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DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

*TB 9-6625-2295-35

CALIBRATION PROCEDURE FOR OSCILLOSCOPE, OS-288/G (TEKTRONIX, TYPE 2465B) AND TEKTRONIX, TYPES 2465B OPT46 AND 2467B
Headquarters, Department of the Army, Washington, DC 21 October 2002
Approved for public release, distribution is unlimited.
REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS You can improve this manual. If you find any mistakes or if you know of a way to improve these procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form 2028, directly to Commander, U.S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP, Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may also provide DA Form 2028 information to AMCOM via e-mail, fax, or the World Wide Web. Our FAX number is: DSN 788-6546 or Commercial 256842-6546. Our e-mail address is: [email protected]. Instructions for sending an electronic 2028 may be found at the back of this manual. For the World Wide Web, use: https://amcom2028.redstone.army.mil.

Paragraph SECTION I. IDENTIFICATION AND DESCRIPTION Test instrument identification ............................ Forms, records, and reports................................ Calibration description........................................ II. EQUIPMENT REQUIREMENTS Equipment required............................................ Accessories required........................................... III. CALIBRATION PROCESS Preliminary instructions..................................... Equipment setup ................................................ Vertical gain....................................................... Triggering .......................................................... Timing ............................................................... Bandwidth .......................................................... Calibrator........................................................... Parametric measurements ................................. Final procedure .................................................. 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Page 2 2 2 4 4 4 5 6 10 14 20 21 22 23

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*This bulletin supersedes TB 9-6625-2295-35, dated 13 January 1997.

TB 9-6625-2295-35
Paragraph SECTION IV. MENU CALIBRATION PROCESS Prelim inary instructions..................................... Equipment setup ................................................ Power supply ...................................................... DAC REF and input capacitance.......................... CAL 01 horizontal............................................... CAL 02 vertical................................................... CAL 03 triggering ............................................... CAL 06 vertical transient response ..................... CAL 09 parametric measurements...................... Final procedure .................................................. 15 16 17 18 19 20 21 22 23 24 Page 23 24 25 27 27 33 35 36 39 40

SECTION I IDENTIFICATION AND DESCRIPTION 1. Test Instrument Identification. This bulletin provides instructions for the calibration of Oscilloscope, OS-288/G (Tektronix, Type 2465B), and Tektronix, Types 2465B OPT 46 and 2467B. The manufacturer's manual was used as the prime data source in compiling these instructions. The equipment being calibrated will be referred to as the TI (test instrument) throughout this bulletin. a. Model Variations. equipped with an IEEE bus. Tektronix, Type 2465B OPT46 and 2467B OPT10 are

b. Time and Technique. The time required for this calibration is approximately 6 hours, using the dc and low frequency technique. 2. Forms, Records, and Reports a. Forms, records, and reports required for calibration personnel at all levels are prescribed by TB 750-25. b. Adjustments to be reported are designated (R) at the end of the sentence in which they appear. Report only those adjustments made and designated with (R). 3. Calibration Description. TI parameters and performance specifications which pertain to this calibration are listed in table 1.
Test instrument parameters Vertical gain CH1 and CH2 Table 1. Calibration Description Performance specifications Range: 2 mV/div to 5 V/div Accuracy: ą2% (1 M input coupling) ą3% (50 input coupling) Accuracy: ą(1.25% of reading + .03 div) Range: .1 and .5 V/div Accuracy: ą10%

V cursors CH 3 and CH 4

2

TB 9-6625-2295-35
Table 1. Calibration Description - Continued Test instrument parameters Performance specifications Trigger level readout Accuracy: Within ą[3% of setting + 3% of p-p signal + 0.2 division + 0.5 mV +(0.5 mV x probe attenuation factor)] Sensitivity 0.35 division Dc to 50 CH 1 and CH2 1.0 division at 300 Dc coupled 1.5 division at 500 Ac coupled 0.35 division 60 Hz 1.0 division 1.5 division 0.5 x CH 1 or CH 2 requirement to at at 50 300 500

MHz MHz MHz MHz MHz MHz

CH 3 or CH 4 Horizontal timing A sweep

Range: 500 ms/div to 5 ns/div extended to 0.5 ns with X10 mag Accuracy: 500 and 200 ms ą(1.2% of time interval +0.6% of FS) 100 ms to 5 ns ą(0.7% of time interval +0.6% of FS) X10 mag: ą(1.2% of time interval +0.6% of FS) Range: 50 ms/div to 5 ns/div extended to 0.5 ns with X10 mag Accuracy: ą1.0% of time interval +0.6% of FS X10 mag: ą1.5% of time interval +0.6% of FS Accuracy: X10 mag: Accuracy: X10 mag: Accuracy: X10 mag: ą(0.5% of time interval + 0.3% of FS) ą(1% of time interval + 0.3% of FS) ą(0.3% of time interval + 0.1% of FS + 200 ps) ą(0.8% of time interval + 0.1% of FS + 200 ps) ą(0.8% of time interval + 0.3% of FS ą(1.3% of time interval + 0.3% of FS)

B sweep

time with cursors

time with sweep delay

time with cursors on B sweep Delay sweep Bandwidth Calibrator Output voltage Repetition period Parametric measurement Period accuracy

Accuracy: ą(0.3% of delay setting + 0.6% of FS) +0 to -25 ns Dc to 400 MHz at 5 mV or greater 0.4V ą1% into 1 M load Two times the A SEC/DIV setting for SEC/DIV from 100 ns to 100 ms 0.1% during sweep time 0.9% + 0.5 ns + jitter error

3

TB 9-6625-2295-35 SECTION II EQUIPMENT REQUIREMENTS 4. Equipment Required. Table 2 identifies the specific equipment to be used in this calibration procedure. This equipment is issued with Secondary Transfer Calibration Standards Set AN/GSM-286. Alternate items may be used by the calibrating activity. The items selected must be verified to perform satisfactorily prior to use and must bear evidence of current calibration. The equipment must meet or exceed the minimum use specifications listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio between the standard and TI. 5. Accessories Required. The accessories required for this calibration are common usage accessories issued as indicated in paragraph 4 above and are not listed in this calibration procedure.
Table 2. Minimum Specifications of Equipment Required Minimum use Manufacturer and model specifications (part number) Volts out: John Fluke, Model 5820A-5CRange: 10 mV to 20 V GHz (5820A-5C-GHz) Accuracy: ą0.5% Time markers: Range: .5 ns to .5 s Accuracy: ą0.175% Pulses: Risetime: ą0.225 ns Sine wave frequency range: 0 kHz to 500 MHz Range: 0 to 20 V John Fluke, Model 8840A/AFAccuracy: ą 0.025% 05/09 (AN/GSM-64D) Used in CAL 01 adjustment procedure Tektronix, Type 2465BOPT46 (2465BOPT46)

Common name CALIBRATOR OSCILLOSCOPE

DIGITAL MULTIMETER OSCILLOSCOPE

SECTION III CALIBRATION PROCESS 6. Preliminary Instructions a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration process. Personnel should become familiar with the entire bulletin before beginning the calibration. b. Items of equipment used in this procedure are referenced within the text by common name as listed in table 2. c. Unless otherwise specified, verify the results of each test and, whenever the test requirement is not met, take corrective action before continuing with the calibration. Adjustments required to calibrate the TI are included in this procedure. Additional maintenance information is contained in the manufacturer's manual for this TI.

4

TB 9-6625-2295-35 d. When indications specified in paragraphs 7 through 13 are not within tolerance, perform Section IV, Menu Calibration Process. After adjustments are made, repeat paragraphs 7 through 13. Do not perform Section IV if all other parameters are within tolerance. e. Unless otherwise specified, all controls and control settings refer to the TI. 7. Equipment Setup WARNING HIGH VOLTAGE is used or exposed during the performance of the calibration. DEATH ON CONTACT may result if personnel fail to observe safety precautions. REDUCE OUTPUT(S) to minimum after each step within the performance check where applicable. a. Connect TI to a 115 V ac source. NOTE When POWER pushbutton is pressed to ON, TI automatically performs a self-test sequence. Upon successful completion of self-test, TI will be in normal operating mode. NOTE If instrument is subjected to greater than 85 percent relative humidity, bandwidth is reduced by 50 MHz. After the instrument is subjected to greater than 85 percent relative humidity, it requires more than 50 hours of operation at less than 60 percent relative humidity before full bandwidth is restored. b. Press POWER pushbutton to ON and allow at least 20 minutes for equipment to warm up. NOTE If TI displays DIAGNSTIC, PUSH A/B TRIG TO EXIT at power on, one of the power-up tests has failed. If error message on bottom line of display is TEST 04 FAIL xx, where xx is 01, 02, 10, or 11, stored calibration data is in error. If this error message is displayed, press A/B TRIG pushbutton to exit diagnostic mode and perform Section IV. If any other error message occurs, the failure is probably not related to calibration. In this case, the instrument should be repaired before attempting calibration. c. Press corresponding pushbutton for indications as listed in (1) through (9) below:

5

TB 9-6625-2295-35 (1) VERTICAL MODE CH 1 and CH 2 on, CH 3 and CH 4 off. (2) VERTICAL MODE ADD and INVERT off. (3) VERTICAL MODE CHOP/ALT to ALT, and 20 MHz BW LIMIT to off. (4) CH 1 and CH 2 input coupling to 1 M AC. (5) TRIGGER MODE to AUTO LVL, and TRIGGER COUPLING to DC. (6) TRIGGER SOURCE to VERT CH 1 and TRIGGER SLOPE to + (plus). (7) TRACK/INDEP to INDEP. (8) V and t to off (cursors off). (9) Xl0 MAG to off. d. Position controls as listed in (1) through (9) below: (1) VERTICAL POSITION controls to midrange. (2) CH 1 and CH 2 VOLTS/DIV switches to 100 mV and VAR control cw to detent. (3) A SWP SEC/DIV switch to 2 ms (knobs locked) and VAR control cw to detent. (4) Horizontal POSITION control to midrange. (5) TRIGGER LEVEL control to midrange. (6) TRIGGER HOLDOFF control fully ccw to MIN. (7) TRACE SEP control fully cw. (8) SCALE ILLUM control fully ccw. (9) INTENSITY, FOCUS, and READOUT INTENSITY controls for suitable viewing. 8. Vertical Gain a. Performance Check (1) Press and hold CH 1 and CH 2 input coupling pushbuttons to PUSH BOTH BALANCE position until display readout indicates DC BALANCE IN PROGRESS. (2) When signal and readout displays automatically return to normal, connect oscilloscope calibrator output to CH 1. below: (3) Press corresponding pushbuttons for indications as listed in (a) through (e) (a) VERTICAL MODE CH 1 on, and VERTICAL MODE CH 2, CH 3, and (b) (c) (d) (e) 20 MHz BW LIMIT to on. CH 1 and CH 2 input coupling to 1 DC. TRIGGER coupling to DC. TRIGGER SOURCE to VERT CH 1.

CH 4 off.

6

TB 9-6625-2295-35 (4) Set CH 1 VOLTS/DIV switch to 2 mV and A SWP SEC/DIV switch to 1 ms. (5) Position oscilloscope calibrator controls for 1 kHz voltage output. (6) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 3 below. If oscilloscope calibrator error readout indication is not within ą2 percent, perform b below.
Table 3. Channel 1 Vertical Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 5 2 mV 10 mV 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5 2.0 V 10.0 V 5 5.0 V 20.0 V 4

(7) Press TRIGGER SOURCE lower pushbutton to select CH 2. (8) Press VERTICAL MODE pushbuttons CH 2 on, and CH 1 off. (9) Move connection from CH 1 to CH 2. (10) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 4 below. If oscilloscope calibrator error readout indication is not within ą2 percent, perform b below.
Table 4. Channel 2 Vertical Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 5 2 mV 10 mV 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5 2.0 V 10.0 V 5 5.0 V 20.0 V 4

7

TB 9-6625-2295-35 (11)Position oscilloscope calibrator controls for a 10 mV, 1 kHz output into 50. (12)Press CH 2 input coupling pushbutton to select 50 DC. (13)Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 5 below. If oscilloscope calibrator error readout indication is not within ą3 percent, perform b below.
Table 5. Channel 2 50 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 2 mV 10 mV 5 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5

(14) Press VERTICAL MODE CH 2 pushbutton off and CH 1 on. (15) Press TRIGGER SOURCE upper pushbutton to select CH 1. (16)Press CH 1 input coupling pushbutton to select 50 DC. (17) Move connection from CH 2 to CH 1. (18) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 6 below. If oscilloscope calibrator error readout indication is not within ą3 percent, perform b below.
Table 6. Channel 1 50 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 2 mV 10 mV 5 5 mV 20 mV 4 10 mV 50 mV 5 20 mV 0.1 V 5 50 mV 0.2 V 4 100 mV 0.5 V 5 200 mV 1.0 V 5 500 mV 2.0 V 4 1.0 V 5.0 V 5

(19)Move connection from CH 1 to CH 3.

8

TB 9-6625-2295-35 (20) Press corresponding pushbuttons for indications as listed in (a) through (c) below: (a) TRIGGER SOURCE to select CH 3. (b) VERTICAL MODE CH 1 off and CH 3 on. (c) CH 3 VOLTS/DIV to display .1 V on CRT. (21) Adjust oscilloscope calibrator Scope Z 1 M and output settings for 4 or 5 division display as per table 7 below. If oscilloscope calibrator error readout indication is not within ą3 percent, perform b below.
Table 7. Channel 3 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 0.1 V 0.5 V 5 0.5 V 2 V 4

(22) Move connection from CH 3 to CH 4. (23) Press corresponding pushbuttons for indications as listed in (a) through (c) below: (a) TRIGGER SOURCE to select CH 4. (b) VERTICAL MODE CH 3 off and CH 4 on. (c) CH 4 VOLTS/DIV to display .1 V on crt. (24) Adjust oscilloscope calibrator output settings for 4 or 5 division display as per table 8 below. If oscilloscope calibrator error readout indication is not within ą3 percent, perform b below.
Table 8. Channel 4 Input Gain Test instrument Calibration Test instrument VOLTS/DIV generator vertical deflection switch settings output settings in divisions 0.1 V 0.5 V 5 0.5 V 2 V 4

(25) Move connection from CH 4 to CH 1 and set oscilloscope calibrator for 10 mV, 1 kHz output. (26) Press corresponding pushbuttons for indications as listed in (a) through (d) below: CH 4 off. (a) VERTICAL MODE CH 1 on and VERTICAL MODE CH 2, CH 3, and (b) CH 1 input coupling to 1 M DC. (c) TRIGGER SOURCE to select VERT CH 1. (d) V to indicate V (cursors on).

9

TB 9-6625-2295-35 (27) Set CH 1 VOLTS/DIV switch to 2 mV and adjust CH 1 VERTICAL POSITION control to center waveform on display. (28) Adjust REF OR DLY POS control to align reference cursor with bottom of waveform for each of the following steps. (29) Adjust control to align cursor with top of waveform and verify indications are within tolerances listed in table 9 below. If V readout indications are not within limits given in table 9, perform b below.
Test instrument VOLTS/DIV switch settings 2 mV 5 mV 10 mV 20 mV 50 mV 100 mV 200 mV 500 mV 1.0 V 2.0 V 5.0 V Table 9. V with Cursors Oscilloscope Test instrument calibrator V readout indications output settings Min Max 10 mV 9.81 mV 10.2 20 mV 19.6 mV 20.4 50 mV 49.0 mV 50.9 0.1 V 98.1 mV 102.0 0.2 V 196 mV 204 0.5 V 490 mV 509 1.0 V .981 V 1.02 2.0 V 1.96 V 2.04 5.0 V 4.90 V 5.09 10.0 V 9.81 V 10.2 20.0 V 19.6 V 20.4

mV mV mV mV mV mV V V V V V

b. Adjustments. Perform section IV below 9. Triggering a. Performance Check below: (1) Press corresponding pushbutton for indications as listed in (a) through (e) (a) VERTICAL MODE CH 1 on and VERTICAL MODE CH 2, CH 3, and (b) (c) (d) (e) TRIGGER SOURCE to VERT CH 1. TRIGGER MODE to NORM. CH 1 and CH 2 input coupling to 1 M DC. V to off (cursors off).

CH 4 off.

(2) Position controls as listed in (a) through (c) below: (a) CH 1 VOLTS/DIV switch to 5 mV. (b) CH 1 and CH 2 VOLTS/DIV VAR controls cw to detent. (c) TRIGGER LEVEL control to midrange. (3) Connect oscilloscope calibrator output to CH 1.

10

TB 9-6625-2295-35 (4) Position oscilloscope calibrator controls for a 20 mV, 1 kHz output. NOTE Combine steps (5) and (6) below to avoid resetting standards. (5) Adjust TRIGGER LEVEL control for most positive voltage that produces a barely triggered display when selecting + and - SLOPE. If A TRIGGER LEVEL readout indication is not within limits given in + peak column of table 10, perform b below. (6) Adjust TRIGGER LEVEL control for most negative voltage that produces a barely triggered display when selecting + and - SLOPE. If A TRIGGER LEVEL readout indication is not within limits given in - peak column of table 10, perform b below.
Table 10. Trigger Level 1 M Input Coupling Test instrument trigger level Calibration readout indications generator + peak - peak output settings Min Max Min Max 20 mV 16.8 mV 23.2 mV -2.6 mV 2.6 mV 50 mV 44 mV 56 mV -4.5 mV 4.5 mV 0.1 V 89 mV 111 mV -8.0 mV 8.0 mV 0.2 V 178 mV 222 mV -16 mV 16 mV 0.5 V 450 mV 550 mV -35 mV 35 mV 1.0 V 0.90 V 1.10 V -70 V 70 mV 2.0 V 1.78 V 2.22 V -.16 V .16 V 5.0 V 4.50 V 5.50 V -.35 V .35 V 10.0 V 9.0 V 11.0 V -0.7 V 0.7 V 20.0 V 17.8 V 22.2 V -1.6 V 1.6 V

Test instrument VOLTS/DIV switch settings 5 mV 10 mV 20 mV 50 mV 100 mV 200 mV 500 mV 1.0 V 2.0 V 5.0 V

(7) Set CH 1 VOLTS/DIV switch to 5 mV and position oscilloscope calibrator controls for a 20 mV, 1 kHz output. (8) Pull SEC/DIV knob out and press A/B TRIG pushbutton for B TRIGGER and press TRIGGER MODE pushbutton for TRIG DLY. Adjust TRIGGER LEVEL for a stable display. (9) Adjust REF OR DLY POS control for a delay readout of 0.000 ms. NOTE Combine steps (10) and (11) below to avoid resetting standards (10) Adjust TRIGGER LEVEL control (all table settings) for most positive voltage that produces an intensified point on waveform display when selecting + and - SLOPE. If B TRIGGER level readout indication is not within limits given in + peak column of table 11, perform b below. (11) Adjust TRIGGER LEVEL control (all table settings) for most negative voltage that produces an intensified point on waveform display when selecting + and SLOPE. If B TRIGGER level readout indication is not within limits given in -peak column of table 11, perform b below. 11

TB 9-6625-2295-35 NOTE It may me necessary to reselect A SWP and adjust LEVEL control for stable sweep before returning to check B SWP triggering levels in the following table.
Table 11. Trigger Level 1 M Input Coupling Test instrument trigger level Calibration readout indications generator + peak - peak output settings Min Max Min 20 mV 16.8 mV 23.2 mV -2.6 mV 50 mV 44 mV 56 mV -4.5 mV 0.1 V 89 mV 111 mV -8.0 mV 0.2 V 178 mV 222 mV -16 mV 0.5 V 450 mV 550 mV -35 mV 1.0 V 0.90 V 1.10 V -70 V 2.0 V 1.78 V 2.22 V -.16 V 5.0 V 4.50 V 5.50 V -.35 V 10.0 V 9.0 V 11.0 V -0.7 V 20.0 V 17.8 V 22.2 V -1.6 V

Test instrument VOLTS/DIV switch settings 5 mV 10 mV 20 mV 50 mV 100 mV 200 mV 500 mV 1.0 V 2.0 V 5.0 V

Max 2.6 mV 4.5 mV 8.0 mV 16 mV 35 mV 70 mV .16 V .35 V 0.7 V 1.6 V

(12) Press corresponding pushbuttons for indications listed in (a) through (c) below: (a) 20 MHz BW LIMIT off. (b) TRIGGER SLOPE to + (plus) and TRIGGER COUPLING to AC. (c) TRIGGER MODE to AUTO LVL and TRIGGER SOURCE to VERT CH

1.

(13) Set CH 1 VOLTS/DIV switch to 100 mV and A SWP SEC/DIV switch to 50 ľs (knobs locked). (14) Set oscilloscope calibrator for leveled sine wave and connect output to CH 1 using a 50 feedthrough terminator. (15) Position oscilloscope calibrator controls for 50 kHz and an amplitude of 0.35 division of display. (16) Adjust TRIGGER LEVEL control for a stable display at all settings listed in table 12. If a stable display cannot be obtained, perform b below. NOTE Set A SWP SEC/DIV switch and press X10 MAG pushbutton as necessary to obtain a well-defined display of test signal.

12

TB 9-6625-2295-35
Table 12. Channel 1 Trigger Level Frequency Response Stability Calibration generator frequency 50 kHz 50 50 300 300 500 500 MHz MHz MHz MHz MHz MHz Test instrument trigger coupling AC AC DC DC AC AC DC 1 1 1.5 1.5 Test instrument divisions of display .35 .35 .35

(17) Press corresponding pushbuttons for indications as listed in (a) through (f) below: (a) (b) (c) (d) (e) (f) VERTICAL MODE CH 1 off and CH 2 on. TRIGGER SOURCE to CH 2. TRIGGER COUPLING to AC. CH 2 switch to 100mV. X10 MAG to off. SEC/DIV switch to 50 ľS.

(18) Connect oscilloscope calibrator (with 50 load) to channel 2. (19) Adjust TRIGGER LEVEL control for a stable display at all settings listed in table 13. If a stable display cannot be obtained, perform b below. NOTE Set A SWP SEC/DIV switch and press X10 MAG pushbutton as necessary to obtain a well-defined display of test signal.
Table 13. Channel 2 Trigger Level Frequency Response Stability Calibration generator frequency 50 kHz 50 50 300 300 500 500 MHz MHz MHz MHz MHz MHz Test instrument Trigger coupling AC AC DC DC AC AC DC 1 1 1.5 1.5 Test instrument divisions of display .35 .35 .35

b. Adjustments. Perform Section IV below.

13

TB 9-6625-2295-35 10. Timing a. Performance Check below: (1) Press corresponding pushbuttons for indications as listed in (a) through (c) (a) VERTICAL MODE CH1 on and CH2, CH3, and CH 4 off. (b) TRIGGER MODE to AUTO LVL and TRIGGER SOURCE to VERT CH 1. (c) Xl0 MAG off. (2) Connect oscilloscope calibrator output to CH 1 using a 50 feedthrough termination. (3) Set A SWP SEC/DIV switch to 5 ns (knobs locked). (4) Position oscilloscope calibrator controls for MARKERS, and 5 nS output. (5) Set CH 1 VOLTS/DIV switch for approximately 2 to 3 divisions of display. (6) Adjust TRIGGER LEVEL control for a stable display. (7) Adjust horizontal POSITION control to align 2nd time marker with 2nd vertical graticule line and oscilloscope calibrator err control to align 10th time marker with 10th vertical graticule line for all settings in table 14. If oscilloscope calibrator error readout indication is not within listed accuracies, perform b below.
Table 14. A SWP Timing Test instrument Oscilloscope A SWP SEC/DIV calibrator switch settings output settings 5 ns 5 ns 10 ns 10 ns 20 ns 20 ns 50 ns 50 ns 100 ns .1 ľs 200 ns .2 ľs 500 ns .5 ľs 1 ľs 1 ľs 2 ľs 2 ľs 5 ľs 5 ľs 10 ľs 10 ľs 20 ľs 20 ľs 50 ľs 50 ľs 100 ľs .1 ms 200 ľs .2 ms 500 ľs .5 ms 1 ms 1 ms 2 ms 2 ms 5 ms 5 ms

Accuracy (%) ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45 ą1.45

14

TB 9-6625-2295-35
Table 14. A SWP Timing - Continued Test instrument Oscilloscope A SWP SEC/DIV calibrator Accuracy switch settings output settings (%) 10 ms 10 ms ą1.45 20 ms 20 ms ą1.45 50 ms 50 ms ą1.45 100 ms .1 s ą1.45 200 ms .2 s ą1.95 500 ms .5 s ą1.95 5 mS X10 MAG .5 ms ą1.95

(8) Press Xl0 MAG pushbutton to off. (9) Set A SWP SEC/DIV switch to 10 ns, and B SWP SEC/DIV switch to 5 ns (knob in) for B SWP only. (10) Position oscilloscope calibrator controls for 5 nS output. (11) Adjust TRIGGER LEVEL control for a stable display. (12) Adjust horizontal POSITION control to align 2d time marker with 2d vertical graticule line, and adjust oscilloscope calibrator controls to align 10th time marker with 10th vertical graticule line for all settings in table 15 below. If oscilloscope calibrator error readout indication is not within ą1.75 percent, perform b below.
Table 15. B SWP Timing Test instrument Calibration A SWP SEC/DIV B SWP SEC/DIV generator switch settings switch settings output settings 10 nS 5 nS 5 nS 20 ns 10 ns 10 nS 50 ns 20 ns 20 nS 100 ns 50 ns 50 nS 200 ns 100 ns .1 ľS 500 ns 200 ns .2 ľS 1 ľs 500 ns .5 ľS 2 ľs 1 us 1 ľS 5 ľs 2 us 2 ľS 10 ľs 5 us 5 ľS 20 ľs 10 us 10 ľS 50 ľs 20 us 20 ľS 100 ľs 50 us 50 ľS 200 ľs 100 us .1 mS 500 ľs 200 us .2 mS 1 ms 500 us .5 mS 2 ms 1 ms 1 mS 5 ms 2 ms 2 mSD

15

TB 9-6625-2295-35
Table 15. B SWP Timing - Continued Test instrument Calibration A SWP SEC/DIV B SWP SEC/DIV generator switch settings switch settings output settings 10 ms 5 ms 5 ms 20 ms 10 ms 10 ms 50 ms 20 ms 20 ms 100 ms 50 ms 50 ms 5 mS X10 MAG 2 mS 200 ľs (500 ľs disp) (200 ľs disp)

(13) Press X10 MAG pushbutton off. (14) Press t pushbutton on (cursors on CRT). (15) Position oscilloscope calibrator controls for 5 nS output. (16) Set A SWP SEC/DIV switch to 5 ns (knobs locked). (17) Adjust REF OR DLY POS control to align one cursor with 2d time marker and control to align other cursor with 10th time marker for each setting in table 16. If t readout indication is not within limits as listed in table 16, perform b below.
Test instrument A SWP SEC/DIV switch settings 5 ns 10 ns 20 ns 50 ns 100 ns 200 ns 500 ns 1 ľs 2 ľs 5 ľs 10 ľs 20 ľs 50 ľs 100 ľs 200 ľs 500 ľs 1 ms 2 ms 5 ms 10 ms 20 ms 50 ms 100 ms 200 ms 500 ms Table 16. A SWP Cursor Timing Oscilloscope Test instrument calibrator output t readout indications settings Min Max 5 ns 39.65 ns 40.35 ns 10 ns 79.30 ns 80.70 ns 20 ns 158.6 ns 161.4 ns 50 ns 396.5 ns 403.5 ns .1 ľs 793.0 ns 807.0 ns .2 ľs 1586 ns 1614 ns .5 ľs 3965 ns 4035 ns 1 ľs 7.93 ľs 8.07 ľs 2 ľs 15.86 ľs 16.14 ľs 5 ľs 39.65 ľs 40.35 ľs 10 ľs 79.30 ľs 80.70 ľs 20 ľs 158.60 ľs 161.4 ľs 50 ľs 396.5 ľs 403.5 ľs .1 ms 793.0 ľs 807.0 ľs .2 ms 1586.0 ľs 1614.0 ľs .5 ms 3965 ms 4035 ľs 1 ms 7.930 ms 8.070 ms 2 ms 15.860 ms 16.140 ms 5 ms 39.65 ms 40.35 ms 10 ms 79.30 ms 80.70 ms 20 ms 158.60 ms 161.40 ms 50 ms 396.5 ms 403.5 ms .1 s 793.0 ms 807.0 ms .2 s 1578 ms 1622 ms .5 s 3945 ms 4055 ms

16

TB 9-6625-2295-35 (18) Set A SWP SEC/DIV switch to 10 ns and B SWP SEC/DIV switch to 5 ns (knob out). (19) Press corresponding pushbuttons for indications as listed in (a) through (d) below. (a) (b) (c) (d) TRIGGER SOURCE to VERT CH 1. t to off (DLY readout). A/B TRIG for B TRIGGER and TRIGGER MODE to RUN AFT DLY. Xl0 MAG on.

(20) Position oscilloscope calibrator controls for 10 nS output. (21) Set VOLTS/DIV switch as required for a display of 3 to 6 divisions and adjust REF OR DLY POS control for DLY readout of 10.64 ns. (22) Adjust TRIGGER LEVEL control as required for a stable display. (23) Adjust horizontal POSITION control cw until the trace stops moving, then ccw to position leading edge of the 2d time marker near graticule center. (24) Position oscilloscope calibrator controls for 5 nS output. (25) Press t pushbutton to obtain t display and push in SEC/DIV knob for B SWP only. (26) Adjust control for a t readout indication near -10.00 ns to superimpose the two time markers. If t readout indication is not between -9.68 ns and -10.32 ns with the two time markers superimposed, perform b below. (27) Repeat technique of (26) above for t readout indications listed in table 17. If t readout indications are not within specified limits in table 10 with the two time markers superimposed, perform b below.
Table 17. Delta Time Display Test instrument t readout t readout indications limits indications (ns) Min (ns) Max (ns) 0.0 -0.30 0.30 10 9.68 10.32 20 19.64 20.36 30 29.62 30.38 40 39.58 40.42 50 49.56 50.44 60 59.52 60.48 70 69.50 70.50 80 79.46 80.54

(28) Set A SWP SEC/DIV switch to 20 ns and B SWP SEC/DIV switch to 5 ns (knob out). (29) Press X10 MAG pushbutton on and t pushbutton off for DLY readout.

17

TB 9-6625-2295-35 (30) Position oscilloscope calibrator controls for 20 nS output. (31) Adjust REF OR DLY POS control for DLY readout of 21.25 ns and horizontal POSITION control to position leading edge of 2d time marker near graticule center. (32) Position oscilloscope calibrator controls for 5 nS output. (33) Press t pushbutton to obtain a t display and push in SEC/DIV knob for B SWP only. (34) Adjust control for a t readout indication near -20.00 ns to superimpose the two time markers. If t readout indication is not between -19.55 ns and -20.45 ns with the two time markers superimposed, perform b below. (35) Adjust control for a t readout indication near 20.00 ns to superimpose the two time markers. If t readout indication is not between 19.55 ns and 20.45 ns with the two time markers superimposed, perform b below. (36) Adjust control for a t readout indication near 160.00 ns to superimpose the two time markers. If t readout indication is not between 159.15 ns and 160.85 ns with the two time markers superimposed, perform b below. (37) Set A SWP SEC/DIV switch to 50 ns and B SWP SEC/DIV switch to 5 ns (knob out). (38) Press X10 MAG pushbutton on and t pushbutton off for DLY readout. (39) Position oscilloscope calibrator controls for 50 ns output. (40) Adjust REF OR DLY POS control for DLY 53.2 ns and horizontal POSITION control to position leading edge of 2d time marker near graticule center. (41) Position oscilloscope calibrator controls for 5 ns output. (42) Press t pushbutton to obtain a t display and push in SEC/DIV knob for B SWP only. (43) Adjust control for a t readout indication near -50.0 ns to superimpose the two time markers. If t readout indication is not between -49.20 ns and -50.80 ns with the two time markers superimposed, perform b below. (44) Adjust control for a t readout indication near 50.00 ns to superimpose the two time markers. If t readout indication is not between 49.20 ns and 50.80 ns with the two time markers superimposed, perform b below. (45) Adjust control for a t readout indication near 400.00 ns to superimpose the two time markers. If t readout indication is not between 398.10 ns and 401.90 ns with the two time markers superimposed, perform b below. (46) Press TRACK/INDEP pushbutton for TRACK. (47) Set A SWP SEC/DIV switch to 100 ns and set B SWP SEC/DIV switch to 10 ns (knob out). (48) Press Xl0 MAG pushbutton on. 18

TB 9-6625-2295-35 (49) Position oscilloscope calibrator controls for .1 ľs output. (50) Press t pushbutton for DLY and adjust REF OR DLY POS controls for a t readout of 800.0 ns (8 times A SWP SEC/DIV setting). (51) Adjust horizontal POSITION control to align leading edge of 2d time marker on A sweep with center vertical graticule line. (52) Adjust TRACE SEP control ccw to separate traces. (53)If B sweep time marker is not 3.4 divisions or less from center graticule line, perform b below. (54) Set A SWP SEC/DIV switch to 200 ns and set B SWP SEC/DIV switch to 20 ns (knob out). (55) Press X10 MAG pushbutton on. (56) Position oscilloscope calibrator controls for .2 ľS output. (57) Repeat technique of (50) through (54) above. (58) Press TRACK/INDEP pushbutton for INDEP (out). (59) Set A SWP SEC/DIV switch to 500 ns and set B SWP SEC/DIV switch to 5 ns (knob out). (60) Position oscilloscope calibrator controls for .5 ľs output. NOTE Performing (62) below will lock A and B sweep together at difference established in (60) above. Rotating the SEC/DIV knob will set both A sweep and B sweep while maintaining the established difference. (61) Press and hold TRACK/INDEP separate traces pushbutton then push in SEC/DIV knob. (62) Pull SEC/DIV knob out. (63) Adjust and REF SEC/DIV setting.
OR

DLY POS controls for a t readout of 8 times A SWP

(64) Adjust horizontal POSITION control to align leading edge of 2d time markers on A sweep with 2d vertical graticule line. (65) Adjust TRACE SEP control ccw to separate traces. (66) If B sweep time marker is not 3.4 divisions or less from center graticule line, perform b below. (67) Repeat technique of (63) through (66) above for settings listed in table 18. If B sweep timed marker is not 3.4 divisions from center graticule line, (except where noted), perform b below.

19

TB 9-6625-2295-35
Table 18. Delayed Sweep Delta Time Test instrument Oscilloscope calibrator A SWP SEC/DIV B SWP SEC/DIV output settings switch settings switch settings 1 ľS 1 ms 10 ns 2 ľS 2 ms 20 ns 5 ľS 5 ms 50 ns 10 ľS 10 ms 100 ns 20 ľS 20 ms 200 ns 50 ľS 50 ms 500 ns .1 mS 100 ms 1 ms .2 mS 200 ms 2 ms .5 mS 500 ms 5 ms 1 mS 1 ms 10 ms 2 mS 2 ms 20 ms 5 mS 5 mS 50 ms 10 mS 10 ms 100 ms 20 mS 20 ms 200 ms 50 mS 50 ms 500 ms .1 S 100 ms 1 ms .2 S 200 ms 2 ms 1 .5 S 500 ms 5 ms 1
17.4

divisions or less.

b. Adjustments. Refer to Section IV below. 11. Bandwidth a. Performance Check (1) Set A SWP SEC/DIV switch to 50 ľs (knobs locked). (2) Set CH 1 VOLTS/DIV switch to 20 mV.

below:

(3) Press corresponding pushbuttons for indications as listed in (a) through (e)
(a) VERTICAL MODE CH1 on and VERTICAL MODE CH2, CH3, and (b) (c) (d) (e) CH1 and CH2 input coupling for 1 MDC. TRIGGER SOURCE for VERT CH1. t off. TRACK/INDEP for INDEP.

CH4 off.

(4) Connect oscilloscope calibrator level sine to CH1 using a 50 feedthrough termination. (5) Position oscilloscope calibrator controls for a 6 division display at 50 kHz.

20

TB 9-6625-2295-35 NOTE Adjust SEC/DIV, X10 MAG, and triggering LEVEL as needed in the following checks. (6) Increase oscilloscope calibrator frequency until display is 3.5 divisions for channels and levels as listed in table 19 below. If oscilloscope calibrator frequency is not 400 MHz or greater, perform b below.
Table 19. Bandwidth Test instrument CHANNEL 1 2 3 4 VOLTS/DIVISION 20 mV 20 mV .1 V .1 V Calibrator output 6 Div @ 50 kH (ref) 6 Div @ 50 kH (ref) 6 Div @ 50 kH (ref) 6 Div @ 50 kH (ref)

b. Adjustments. Perform section IV below. 12. Calibrator a. Performance Check below: (1) Press corresponding pushbuttons for indications as listed in (a) through (c) (a) VERTICAL MODE CH 1 on, and VERTICAL MODE CH 2, CH 3 and (b) CH 1 input coupling to 1 M.

CH 4 off.

(2) Set CH 1 and CH 2 VOLTS/DIV switches to 50 mV, and VAR control fully cw to detent. (3) Set A SWP and B SWP SEC/DIV switch to 50 ľs (knobs locked) and adjust SEC/DIV VAR control fully cw to detent. (4) Connect CH 1 to TI CALIBRATOR output terminal. (5) Set CH1 VAR control for a full-scale (8 division) vertical display. NOTE If VAR control will not display full scale, set VOLTS/DIV switch for 20 mV. (6) Disconnect TI calibrator from CH 1. (7) Connect oscilloscope calibrator output to CH 1. (8) Set oscilloscope calibrator controls for 400 mV voltage out at 10 kHz. Adjust oscilloscope calibrator full vertical scale display. If oscilloscope calibrator error is not less than 1% perform b below. b. Adjustments. Refer to Section IV below.

21

TB 9-6625-2295-35 13. Parametric Measurements a. Performance Check (1) Press VERTICAL MODE CH1 pushbutton to on. (2) Press VERTICAL MODE CH 2, 3, and 4 pushbuttons to off. (3) Press CH1 input coupling pushbutton to 50DC. (4) Control settings not listed do not affect the procedure. (5) Connect oscilloscope calibrator output to CH1. (6) Position oscilloscope calibrator controls for MARKERS, and a 2 nS output. (7) Press SETUP MEASURE pushbutton. (8) Press 1 pushbutton to select FREQ measurement. (9) If TI PERIOD readout indication is not between 1.49 ns and 2.51 ns, perform b below. (10) Repeat technique of (6) through (9) above for each oscilloscope calibrator output setting listed in table 20.
Calibration generator output settings 5 nS 10 nS 20 nS 50 nS .1 uS .2 uS .5 uS 1 uS 2 uS 5 uS 10 uS 20 uS 50 uS .1 mS .2 mS .5 mS 1 mS 2 mS 5 mS 10 mS 20 mS 50 mS1 .1 S1 Table 20. Period Test instrument period indications Min 4.48 ns 9.54 ns 19.40 ns 49.25 ns 99.0 ns 198.5 ns 497.0 ns 994.5 ns 1.989 us 4.975 us 9.950 us 19.90 us 49.75 us 99.50 us 199.0 us 497.5 us 995.0 us 1.990 ms 4.975 ms 9.950 ms 19.90 ms 49.75 ms 99.50 ms Max 5.52 ns 10.55 ns 20.40 ns 50.75 ns 101.0 ns 201.5 ns 503.0 ns 1.005 us 2.011 us 5.025 us 10.05 us 20.10 us 50.25 us 100.5 us 201.0 us 502.5 us 1.005 ms 2.010 ms 5.025 ms 10.05 ms 20.10 ms 50.25 ms 100.5 ms

1To perform the 50 and 100 ms measurements, the MINFREQ must be set to 10 Hz.

22

TB 9-6625-2295-35 NOTE To set the MINFREQ to 10 Hz program the TI as follows: ˇ ˇ ˇ Press SETUP MEASURE pushbutton. Select CONFIGURE (4 pushbutton) and press. Select MINFREQ (3 pushbutton) and press. Select 10 Hz (2 pushbutton) and press.

ˇ

NOTE After the 50 ms and 100 ms checks are made, return MINFREQ to 50 Hz. b. Adjustments (1) Press POWER pushbutton to OFF, remove protective cover, and move CAL NO/CAL jumper to the CAL position. (2) Press POWER pushbutton to ON and allow 20 minutes warm-up. (3) Simultaneously press and hold t and V pushbuttons; then press and hold TRIGGER SLOPE pushbutton. Hold in all three pushbuttons for approximately 1 second and then release. Top of display will indicate: DIAGNSTIC.PUSH A/B TRIG TO EXIT. (4) Proceed to Section IV, paragraph 24, below. 14. Final Procedure a. Deenergize and disconnect all equipment. b. Annotate and affix DA label/form in accordance with TB 750-25. SECTION IV MENU CALIBRATION PROCESS 15. Preliminary Instructions a. The procedures in paragraph 17 through 24 should be performed only if an outof-tolerance condition exists in paragraphs 8 through 14 or if an error message on the bottom line of the crt display is: TEST 04 XX where XX is 01, 02, 10, or 11 when POWER pushbutton is pressed to ON. b. When performing paragraphs 19 through 24, touch only the specific control or controls called out in the procedure. Movement of any other control may cause erroneous calibration results.

23

TB 9-6625-2295-35 c. Within the automatic calibration procedure, the calibration constants for timing, vertical gain, and trigger level are generated by the system microprocessor and stored in nonvolatile memory. The adjustments in CAL 01, 02, 03 should be done in numerical sequence. d. When performing automatic CAL steps, initial setting of front-panel controls is not required. 16. Equipment Setup WARNING HIGH VOLTAGE is used or exposed during the performance of this calibration. DEATH ON CONTACT may result if personnel fail to observe safety precautions. REDUCE OUTPUT(S) to minimum after each step within the performance check where applicable. NOTE When performing any of the automatic calibration routines the CAL/NO CAL jumper P501 must be moved to its CAL position (between pins 1 and 2) before turning the power on. When the desired calibration has been performed, return the jumper to its NO CAL position. a. Press TI POWER pushbutton to off and disconnect TI from the 115 V ac source. Remove protective cover and move CAL NO/CAL jumper (P501) on A5 control board (right side of TI) to CAL position. b. Connect TI to a 115 V ac source and press POWER pushbutton to ON and allow at least 20 minutes for equipment warm-up. NOTE When POWER pushbutton is pressed to ON, TI automatically performs a self-test sequence. Upon successful completion of self-test, TI will be in normal operating mode. NOTE Throughout this procedure, readout and control messages are displayed along the top and bottom of display (crt). c. Press corresponding pushbuttons for indications as listed in (1) through (10) below: (1) VERTICAL MODE CH 1 and CH 2 on. (2) VERTICAL MODE CH 3 and CH 4 off. (3) CH 1 and CH 2 input coupling to 1 MDC.

24

TB 9-6625-2295-35 (4) VERTICAL MODE ADD, INVERT, and BW LIMIT off. (5) VERTICAL MODE CHOP/ALT to ALT. (6) TRIGGER MODE to AUTO LVL. (7) TRIGGER SOURCE to VERT, CH 1. (8) TRIGGER COUPLING to DC. (9) TRIGGER SLOPE to + (plus). (10) TRACK/INDEP to INDEP. d. Position controls as listed in (1) through (9) below: (1) VERTICAL POSITION to midrange. (2) CH 1 and CH 2 VOLTS/DIV switch to 100 mV and VAR controls to fully cw detent. (3) A SEC/DIV switch to 100 ľs. (4) SEC/DIV VAR control fully cw detent. (5) Horizontal POSITION control to midrange. (6) TRIGGER LEVEL to midrange. (7) TRIGGER HOLDOFF fully cw to detent. (8) SCALE ILLUM fully ccw. (9) INTENSITY, FOCUS, and READOUT INTENSITY controls for suitable viewing. e. Allow at least 20 minutes for equipment warm-up. 17. Power Supply a. Performance Check (1) Press VERTICAL MODE pushbuttons CH 2, CH 3, and CH 4 to off. (2) Connect digital multimeter HI to TI J119 (fig. 1) pin 4 and LO to chassis ground. If digital voltmeter does not indicate between +9.99 and +10.01 V DC, perform b below. b. Adjustments. Adjust VOLT REF ADJ R1292 (fig. 2) until digital multimeter indicates 10.00 V DC (R).

25

TB 9-6625-2295-35

Figure 1. A1 main board - adjustment locations.

Figure 2. Adjustment locations.

26

TB 9-6625-2295-35 18. DAC REF and Input Capacitance a. Performance Check (1) Connect digital multimeter HI to J119 (fig. 1) pin 13 and LO to chassis ground. (2) Press t pushbutton for a t display on crt. (3) Adjust control ccw until digital multimeter indication remains at a constant value (approximately -1.25 V dc). Record indication. (4) Adjust control cw until digital multimeter indication remains at a constant value (approximately 1.25 V dc). Record indication. (5) Add the absolute values of indications recorded in (3) and (4) above. If sum of indications does not equal 2.500 V dc, adjust DAC RF R2010 (fig. 2) for 1.250 V dc or best compromise on digital multimeter while repeating (3) and (4) above. (6) Disconnect digital multimeter. (7) Press t pushbuttons to off (no cursors on display). (8) Connect oscilloscope calibrator output to CH 1 using a 5-80 pF standardizer. (9) Position oscilloscope calibrator VARIABLE ON, and a 600 mV, 1 kHz output. controls for AMPL MODE EDGE,

(10) Adjust oscilloscope calibrator VAR control for a 6 division display. (11) Adjust 5-80 pF standardizer for a square front corner over the first 40 ľs (0.4 division) of the positive portion of waveform. Note waveform front corner for use in (14) below. (12) Position oscilloscope calibrator controls for a 300 mV, 1 kHz output. (13) Set VOLTS/DIV switch to 50 mV and repeat (10) above. (14) Adjust 50 mV C ADJ C105 (C205 for CH 2) (fig. 1) for same waveform front corner as noted in (11) above. (15) Set VOLTS/DIV switch to 100 mV. (16) Repeat (9) through (15) above until no change is observed in the waveform front corner. (17) Press VERTICAL MODE CH 1 to off and CH 2 to on. (18) Press TRIGGER SOURCE pushbutton to CH 2. (19) Repeat technique of (8) through (16) above for CH 2. 19. CAL 01 Horizontal a. Performance Check (1) Simultaneously press and hold t and V pushbuttons; then press and hold TRIGGER SLOPE pushbutton. Hold in all three pushbuttons for approximately 1 second and then release. Top of display will indicate: DIAGNSTIC.PUSH A/B TRIG TO EXIT. 27

TB 9-6625-2295-35 (2) Press upper TRIGGER MODE pushbutton to CAL 01 (bottom left of display). CAUTION Upon entering CAL 01, the input coupling is automatically set to 50 DC and 50 overload protection is disabled. Before starting procedure, make sure any 50 overload condition has been cleared. NOTE In this procedure, pressing up and releasing TRIGGER COUPLING pushbutton stores current calibration parameter being set and increments routine to next step (except where otherwise noted). NOTE Throughout this paragraph the INTENSITY and POSITION controls may be adjusted as necessary for proper viewing of displayed signal. (3) Connect digital multimeter HI to TI CALIBRATOR output (front panel) and LO to chassis ground. (4) Set digital multimeter to measure dc volts. (5) Press and release upper TRIGGER COUPLING pushbutton. The display readout will indicate ADJ , (step) 0, CH 1 PROBE TO FRONT SIDE OF R489. (6) Connect X10 probe from CH 1 to front side of R489 (TP800) (located at rear of A1 main board near readout connector). (7) Adjust REF OR DLY POS control to center signal on displayed cursor, and adjust control to join traces. (8) Press and release upper TRIGGER COUPLING pushbutton. Check display readout indicates ADJ (step) 1, 100 ľs (for A sweep), 1 ľs (for B sweep), and digital multimeter indicates 0 ąl mV dc. (9) Disconnect X10 probe and connect oscilloscope calibrator output to CH 1. (10) Position oscilloscope calibrator controls for MARKERS and .1 mS output. (11) Set CH 1 VOLTS/DIV switch and adjust TRACE SEP and CH 1 vertical POSITION controls to view main sweep, with time markers on top half of crt and delayed B sweep on bottom half of crt. (12) Adjust horizontal POSITION control to start main sweep at left vertical graticule line and adjust REF OR DLY POS and controls to align both intensified dots on 6th time marker on main sweep and superimpose delayed B sweep time markers.

28

TB 9-6625-2295-35 (13) Press and release upper TRIGGER COUPLING pushbutton. Digital multimeter will indicate between 398 and 402 mV dc, and display readout will indicate ADJ (step) 2, 100 ľs, 1 ľs. (14) Disconnect digital multimeter from TI and adjust REF OR DLY POS control to intensify 2d time marker. (15) Adjust control to intensify 10th time marker and superimpose delayed B sweep time markers within .2 division. (16) Press and release upper TRIGGER COUPLING pushbutton. (17) Display readout will indicate ADJ , (step) 3, 300 ľs, 1 ľs. (18) Adjust REF OR DLY POS control to intensify 4th time marker and control to intensify 28th time marker and superimpose delayed B sweep markers within 1 division. (19) Press and release upper TRIGGER COUPLING pushbutton. NOTE If adjustments are made in (18) above, display readout will indicate ADJ (step) 2, 200 ľs, 1 ľs. Repeat (14) through (19) above until no adjustments are made in (18) above. (20) If no adjustments were made in (18) above, display readout will indicate ADJ , (step) 4, 100 ľs, 1 ľs. (21) Position oscilloscope calibrator controls for 5 ľS output. (22) Adjust control ccw until no further movement of B sweep display occurs. Note position of first time marker of B sweep. (23) Adjust control cw until 2d time marker of B sweep moves left and aligns with position noted in (22) above. NOTE Movement of D REF OR DLY POS control at this point will adversely affect calibration. (24) Press and release upper TRIGGER COUPLING pushbutton. Display readout will indicate Xl, Xl0, HRZ CTR, (step) 5, 10 ľs and two vertical cursors appear on the display. (25) Position oscilloscope calibrator controls for 10 ľS output. (26) If cursors are not aligned with 2d and 10th vertical graticule lines, adjust X1 GAIN R860 (fig. 1), and HRZ CTR R801 (fig. 1) to align the two cursors with 2d and 10th vertical graticule line (R). (27) If TI does not display 1 time marker per division ąl minor division, adjust Xl0 GAIN R850 (fig. 1) for 1 marker per division (R). 29

TB 9-6625-2295-35 (28) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ , (step) 6, 10 ms, 100 ľs. Display

(29) Position oscilloscope calibrator controls for 10 mS output and adjust REF OR DLY POS control to intensify 2d time marker and control to intensify 10th time marker, and superimpose delayed sweep time markers within .2 division. (30) Press and release upper TRIGGER COUPLING pushbutton, and position oscilloscope calibrator controls for 1 ľS output. (31) For each step in table 21 do the following: (a) Adjust REF OR DLY POS and controls as necessary, to intensify indicated time markers on the A sweep and superimpose displayed B sweep time markers within listed limits. (b) Press and release upper TRIGGER COUPLING pushbutton.
Table 21. Timing (CAL 01, steps 7 through 15) Test instrument Calibration REF generator time marker time marker output settings 2 10 1 ľS 2 10 2 ľS 4 28 2 ľS 2 10 10 ľS 2 10 50 ľS 4 28 50 ľS 2 10 .5 ľS 4 28 .5 ľS 3 19 50 nS Test instrument superimposed displayed B sweep ądivision 0.2 0.2 1.2 0.2 0.2 1.2 0.2 1.2 0.2

CAL 01 displayed step number 7 8 91 10 11 121 13 141 15
1If

control is adjusted, the previous step will be repeated.

(32) After completion of step 15 of table 21, TI display will indicate ADJ , (step) 16, 20 ns, 500 ps. (33) Position oscilloscope calibrator controls for 20 nS output. (34) Adjust control for approximately 1 time marker per division. oscilloscope calibrator controls for 2 nS output. (35) Set VOLTS/DIV switch for a display amplitude of >3 division. control to superimpose displayed B sweep time markers. Position Adjust

(36) Press and release upper TRIGGER COUPLING pushbutton and display readout will indicate ADJ , (step) 17, 1 ľs. (37) Return VOLTS/DIV switch to original setting. (38) Adjust TRACE SEP control fully cw. (39) Connect oscilloscope calibrator output to TI CH 1 and oscilloscope CH 1. (40) Connect TI B GATE OUT to oscilloscope CH 2. 30

TB 9-6625-2295-35 (41) Set oscilloscope controls as listed in (a) through (c) below.

31

TB 9-6625-2295-35 (a) CH 1 and CH 2 input coupling to 50 DC and CH 1 on. (b) TRIGGER SOURCE to CH 2 and TRIGGER SLOPE to + (plus). (c) A SWP SEC/DIV switch to 20 ns. (42) Position oscilloscope calibrator controls for 1 ľS output. (43) Adjust TI control for 8 time markers over center 8 major divisions of TI display. Adjust TI REF OR DLY POS control to bring time markers onto oscilloscope display. NOTE It may be necessary to adjust oscilloscope HOLDOFF control to view both time markers. (44) Adjust TI control to superimpose time markers on oscilloscope within 0.2 division. (45) Press and release upper TRIGGER COUPLING pushbutton and display readout will indicate ADJ , (step) 18, 3 ľs. (46) Repeat technique of (42) through (45) for setting listed in table 22. Each time upper TRIGGER COUPLING pushbutton is pressed in (45) above the TI display will indicate next step listed in table 22 unless noted.
Table 22. Timing (CAL 01, Steps 18 Through 27) Test instrument Calibration Oscilloscope CAL 01 generator Superposition displayed Time markers output settings SEC/DIV tolerance in step number over 8 divisions (ľS) settings divisions 181 24 1 20 ns 1.2 19 8 2 50 ns 0.2 201 24 2 50 ns 1.2 21 8 10 200 ns 0.1 22 8 0 1 ľs 0.2 231 24 50 1 ľs 1.2 24 8 .5 10 ns 0.2 251 24 .5 10 ns 1.2 26 8 .1 2 ns 0.2
1If

adjustments are made, TI will indicate previous step.

ns.

(47) After step 26 has been completed TI display will indicate ADJ (step) 27, 20 (48) Adjust control for approximately 1 time marker per division. (49) Position oscilloscope calibrator controls for 5 nS output.

(50) Adjust REF or DLY POS control to bring time markers on to oscilloscope display. (51) Adjust control to superimpose displayed time markers on oscilloscope to within .2 division. 32

TB 9-6625-2295-35 (52) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 28, 500 ps. (53) Disconnect oscilloscope calibrator from oscilloscope CH 1 and connect to CH 2 of TI. (54) Position oscilloscope calibrator controls for 2 nS output. (55) Adjust TRANS RESP (R802) for 2 cycles between 2d and 10th graticule lines at intersections of the two waveforms (R). (56) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 29, 1 ms. (57) Move connection from TI CH 2 to oscilloscope CH 1 and set oscilloscope SEC/DIV switch to 20 ľs. (58) Position oscilloscope calibrator controls for 1 mS output and adjust control for 8 time markers over the center 8 divisions of display. (59) Adjust REF OR DLY POS control as necessary to bring time markers on to oscilloscope display and control to superimpose time markers to within .2 division. (60) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 30, 5 ns. (61) Remove connection from oscilloscope CH 1. (62) Position oscilloscope calibrator controls for 5 nS output. (63) Set VOLTS/DIV switch for >3 divisions of amplitude. (64) Adjust control for 1 time marker per division over center 8 divisions. (65) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 31, 10 ns. (66) Position oscilloscope calibrator controls for 10 nS output. (67) Set VOLTS/DIV switch for >3 divisions of amplitude. (68) Adjust control for 1 time marker per division over center 8 divisions. (69) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 32, 10 ns. NOTE CAL 01 steps 32, 33, and 34 are for instruments with serial numbers B012946 and above. (70) Position oscilloscope calibrator controls for 10 nS output. (71) Set VOLTS/DIV switch for >3 divisions of amplitude. (72) Adjust control for 1 time marker per division over center 8 divisions. (73) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 33, 1 ns.

33

TB 9-6625-2295-35 (74) Position oscilloscope calibrator controls for 2 nS output. (75) Set VOLTS/DIV switch for 1 to 4 divisions of amplitude. (76) Adjust control for 1 time marker per 2 divisions over center 8 divisions. (77) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate ADJ (step) 34, 1 ns. (78) Position oscilloscope calibrator controls for 2 nS output. (79) Set VOLTS/DIV switch for 1 to 4 divisions of amplitude. (80) Adjust control for 1 time marker per 2 divisions over center 8 divisions. (81) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate DIAGNSTIC PUSH A/B TRIG TO EXIT. 20. CAL 02 -Vertical a. Performance Check (1) Press upper TRIGGER MODE pushbutton to CAL 02 (bottom left of display). (2) Press and release upper TRIGGER COUPLING pushbutton. TI will step from 100 to 111 and display will indicate DC BALANCE IN PROGRESS. (3) Display readout will indicate CH 1 VAR, CH 2 POS, (step) 111, 500 mV. (4) Connect oscilloscope calibrator output to CH 1 and position controls for AMPL MODE VOLT and a .5 V, 1 kHz output. (5) Adjust CH 2 POSITION control to position sweep within 1 division of center horizontal graticule line. (6) Adjust CH 1 POSITION and VOLTS/DIV VAR controls for 10 divisions of horizontal deflection. NOTE When step 111 is performed, step 112 is also automatically performed. No indication of step 112 will be shown unless a LIMIT error is encountered. (7) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate (step) 113, 500 mV, BWL. NOTE In the following steps, if the LIMIT message appears, it probably indicates that the upper TRIGGER COUPLING pushbutton was pressed before the required signal was applied. Press and release the lower TRIGGER COUPLING pushbutton, verify that the correct signal is applied, and then press and release the upper TRIGGER COUPLING pushbutton. Display

34

TB 9-6625-2295-35 (8) Press and release upper TRIGGER COUPLING pushbutton for TI step numbers and oscilloscope calibrator output settings as listed in table 23.
Table 23. Vertical Attenuator Check Test instrument CAL 02 Oscilloscope calibrator step numbers output settings 113, 1141 .5 V 115 .2 V 116 .1 V 117 50 mV 118 20 mV 119 1 V 120 10 V
1 When step 113 is performed, step 114 is also automatically done. No indication of stop 114 will be shown unless a LIMIT error is encountered.

(9) Move connection from CH 1 to CH 2. Display readout indicates CONNECT SIGNAL TO CH 2, (step) 121, 500 mV, 500 mV and BWL. NOTE When (step) 121 is performed, (step) 122 is also automatically performed. No indication of (step) 122 will be shown unless a LIMIT error is encountered. (10) Position oscilloscope calibrator controls for a .5 V 1 kHz output. (11) Press and release upper TRIGGER COUPLING switch. Display readout will indicate (step) 123, 500 mV, 500 mV, and BWL. (12) Press and release upper TRIGGER COUPLING pushbutton for TI step numbers and oscilloscope calibrator output settings listed in table 24.
Table 24. Vertical Attenuator Test instrument CAL 02 Oscilloscope calibrator step numbers output settings 1123, 1241 .5 V 125 .2 V 126 .1 V 127 50 mV 128 20 mV 129 1 V 1302 10 V
1When (step) 123 is performed, (step) 124 is also automatically done. No indication of step 124 will be shown unless a LIMIT error is encountered. 2When (step) 130 is performed, (step) 131 is automatically done. No indication of (step) 131 will be shown unless a LIMIT error is encountered.

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TB 9-6625-2295-35 (13) Press and release upper TRIGGER COUPLING pushbutton. TI will automatically step from 130 to 142. Display readout will indicate CONNECT SIGNAL TO CH 1, (step) 142, 50 mV, and BWL. (14) Move connection from CH 2 to CH 1. (15) Position oscilloscope calibrator controls for a 50 mV output. (16) Press and release upper TRIGGER COUPLING pushbutton. Wait approximately 10 seconds for automatic calibration of V cursors. Display readout will indicate VERT CENTER GAIN. Adjust GAIN R638 (fig. 1) for 5 divisions between horizontal cursors (R). (17) Adjust VERTICAL CENTERING R639 (fig. 1) to align cursors with 0 percent and 100 percent graticule lines (R). (18) Press and release upper TRIGGER COUPLING pushbutton. Self calibration will continue 15 to 45 seconds. Display will indicate DIAGNSTIC.PUSH A/B TRIG TO EXIT. 21. CAL 03 - Triggering a. Performance Check (1) Press upper TRIGGER MODE pushbutton to CAL 03 (bottom left of display). (2) Press and release upper TRIGGER COUPLING pushbutton. (3) TI will automatically step from 200 to 214 and stop at 215. Display indicates CH 1, 500 mV, (step) 215. (4) Connect oscilloscope calibrator output to CH 1. (5) Position oscilloscope calibrator controls for AMPL MODE VOLT and a .5 V, 1 kHz output. (6) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate CH 1, 500 mV, (step) 216. (7) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate CH 2, 500 mV, (step) 217. (8) Move connection from CH 1 to CH 2 and repeat (5) above. (9) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate CH 3, 500 mV, (step) 218. (10) Move connection from CH 2 to CH 3 and repeat (5) above. (11) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate CH 3, 2V, (step) 219. (12) Position oscilloscope calibrator controls for a 2 V output. (13) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate CH 4, 500 mV, (step) 220. Display Display Display Display Display

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TB 9-6625-2295-35 (14) Move connection from CH 3 to CH 4. (15) Position oscilloscope calibrator controls for a .5 V output. (16) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate CH 4, 2 V, (step) 221. (17) Position oscilloscope calibrator controls for a 2 V output. (18) Press and release upper TRIGGER COUPLING pushbutton. Display will indicate DIAGNSTIC. PUSH A/B TRIG TO EXIT. 22. CAL 06 - Vertical Transient Response a. Performance Check (1) Press upper TRIGGER MODE pushbutton to CAL 06 (bottom left of display). (2) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 1, 10 mV, 100 ns. Display

(3) Connect oscilloscope calibrator output to CH 1 using pulse head and 10X and 2X attenuator. (4) Position oscilloscope calibrator controls for AMPL MODE FAST EDGE, FREQ 100 kHz, VARIABLE ON. NOTE INTENSITY and POSITION controls may be adjusted as necessary to view waveform in the following steps. (5) Adjust oscilloscope calibrator VAR control for a 5 division display. (6) Press and release upper TRIGGER COUPLING pushbutton twice. (7) Display readout will indicate ADJ (step) 3, 10 mV, 10 ns. (8) Adjust C403, R411, HF ADJUST (R417), L403, (fig. 1) and control for flattest corner over first 5 ns (R). (9) Adjust SEC/DIV VAR control fully ccw and adjust CRT TERMINATION R1501 (fig. 2) for flattest waveform over first 0.2 division (R). Return SEC/DIV VAR control fully cw to detent. Total system will tune up best if indicator cursor is in the 7th or 8th divisions. (10) Press and release upper TRIGGER COUPLING pushbutton. Display readout will indicate ADJ (step) 4, 10 mV, 100 ns. NOTE Pressing the lower TRIGGER COUPLING pushbutton at any step of CAL 06 will return to step 1, then pressing the upper TRIGGER COUPLING pushbutton repeatedly, the routine can be advanced to the desired step. This is useful for CAL steps 1, 2, 3, and 4 where some compromise of adjustments may be necessary.

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TB 9-6625-2295-35 (11) Move connection from CH 1 to CH 2. (12) Adjust oscilloscope calibrator VAR control for a 5 division display. (13) Adjust control for flattest waveform. (14) Press and release lower TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 1, 10 mV, 100 ns. Display

(15) Move connection from CH 2 to CH 1. Position oscilloscope calibrator controls for a 5 division display. (16) Adjust R605, R403, C404, C601 (fig. 1) and CRT TERMINATION R1501 (fig. 2) for flattest response in first 100 ns (R). (17) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 2, 10 mV, 100 ns. Display

(18) Move connection from CH 1 to CH 2. Adjust oscilloscope calibrator VAR control for a 5 division display. (19) Check for necessary compromise of adjustments made in 16 above. (20) Press and release lower TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 1, 10 mV, 100 ns. Display

(21) Remove connection from CH 2 and connect leveled sine wave generator leveling head to CH I using a 50 feedthrough terminator. (22) Position leveled sine wave generator controls for 2 MHz, and a 6 division display. (23) Adjust leveled sine wave generator frequency controls for 250 MHz. (24) Increase leveled sine wave generator frequency from 250 MHz to 420 MHz. Displayed amplitude will be between 4.4 and 6 divisions. (25) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 2, 10 mV, 100 ns. (26) Move connection from CH 1 to CH 2. (27) Repeat (22) through (24) above for CH 2. (28) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 3, 10 mV, 10 ns. Display Display

(29) Connect oscilloscope calibrator output to CH 1 using pulse head and 10X and 2X attenuators. (30) Position oscilloscope calibrator controls for AMPL MODE FAST EDGE, FREQ 100 kHz, VARIABLE ON. Adjust VAR control for a 5 division display. (31) Adjust R411, C403, L403 (fig 1) and control for best response. waveform for use in (35) below (R). (32) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 4, 10 mV, 100 ns. Note

The crt

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TB 9-6625-2295-35 (33) Move connection from CH 1 to CH 2. (34) Adjust oscilloscope calibrator VAR control for a 5 division display. (35) Adjust control until CH 2 waveform matches that noted in (31) above. (36) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 5, 2 mV, 10 ns. Display

(37) Remove connection from CH 2 and connect pulse head to CH 1 using 10X, 5X, and 2X attenuators. Adjust oscilloscope calibrator VAR control for a 5 division display. (38) Adjust control for a spike on front corner of 4 to 5 percent. (39) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 6, 10 mV, 10 ns. Display

(40) Remove 2X attenuator from setup and adjust oscilloscope calibrator VAR control for a 5 division display. (41) Adjust control for best front corner. (42) Press and release the upper TRIGGER COUPLING pushbutton. Display readout will indicate ADJ (step) 7, 20 mV, 10 ns. (43) Remove 5X attenuator from setup and adjust oscilloscope calibrator VAR control for a 5 division display. (44) Adjust control for best front corner. (45) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 8, 50 mV and 10 ns. Display

(46) Replace 10X attenuator in setup with a 5X attenuator and adjust oscilloscope calibrator VAR control for a 5 division display. (47) Adjust control for a spike on front corner of 4 to 5 percent. (48) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 9, l00 mV, l0 ns. Display

(49) Replace 5X attenuator in setup with 2X attenuator and adjust oscilloscope calibrator VAR control for a 5 division display. (50) Adjust control for a front corner overshoot of 6 to 7 percent. This is necessary so 10X bandwidth (0.1 to 0.5 V) will be similar to the 10 mV bandwidth. (51) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 10, 200 mV, 10 ns. Display

(52) Remove 2X attenuator from setup and adjust oscilloscope calibrator VAR control for a 5 division display. (53) Adjust control for best corner. (54) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 11, 500 mV, 10 ns. Display

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TB 9-6625-2295-35 (55) Adjust oscilloscope calibrator VAR control for a 2 division display. (56) Adjust control for best corner. (57) Press and release upper TRIGGER COUPLING pushbutton. readout will indicate ADJ (step) 12, 1 V, 10 ns. (58) Adjust oscilloscope calibrator VAR control for a 1 division display. (59) Adjust control for best corner. (60) Press and release upper TRIGGER COUPLING pushbutton. (61) Steps 13 and 14 are automatically calibrated and display readout will indicate ADJ (step) 15, 2 mV, 10 ns. (62) C