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TG 501
TABLE OF CONTENTS
Page
LIST OF ILLUSTRATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Section 1 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Section 2 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
WARNING
THE FOLLOWING SERVICE INSTRUCTIONS ARE FOR USE BYQUALIFIED
PERSONNEL ONLY. TO AVOID PERSONAL INJURY, DO NOT PERFORM
ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
Section 3 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Section 4 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Performance Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Section s Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Section 6 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Section 7 Replaceable Electrical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Section 8 Diagrams and Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Section 9 Replaceable Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
REV D AUG 1980 i
TG 501
LIST O F ILLUSTRATIONS
Figure
No. Page
2-1 Plug-in installation and removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-3 Timing error of time base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-4 Measuring timing error of time base . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-5 Markers approximately at pulse duration and period . . . . . . . . . . . . . . . . 2-4
2-6 Measuring pulse duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
.
2-7 Measuring pulse period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3-1 Functional Block Diagram of schematic diagrams 1 and 2 circuitry . . . . . . 3-3
3-2 Functional Block Diagram of schematic diagram 3 circuitry . . . . . . . . . . . 3-5
3-3 Functional Block Diagram of schematic diagram 4 circuitry . . . . . . . . . . . 3-7
3-4 Functional Block Diagram of schematic diagram 5 circuitry . . . . . . . . . . . 3-9
5-1 Semiconductor device lead configuration found in the TM 500 family . . . . 5-5
5-2 Location of jumpers and integrated circuits required for clock options . . . 5-9
TG 501
OPERATORS SAFETY SUMMARY
The general safety information in this part of the summary power cord into a properly wired receptacle before
is for both operating and servicing personnel. Specific connecting to the product input or output terminals. A
warnings and cautions will be found throughout the protective ground connection by way of the grounding
manual where they apply, but may not appear in this conductor in the power cord is essential for safe opera-
summary. tion .
Terms In This Manual Danger Arising From Loss of Ground
CAUTION statements identify conditions or practicesthat Upon loss of the protective-ground connection, all
could result i n damage to the equipment or other property . accessible conductive parts (including knobs and con-
trols that may appear to be insulating) can render an
WARNING statements identify conditions or practices electric shock.
that could result in personal injury or loss of life .
Terms As Marked on Equipment
Use the Proper Power Cord
CAUTION indicates a personal injury hazard not im-
mediately accessible as one reads the marking, or a Use only the power cord and connector specified for your
hazard to property including the equipment itself . product.
DANGER indicates a personal injury hazard immediately Use only a power cord that is in good condition.
accessible as one reads the marking.
Refer cord and connector changes to qualified service
personnel.
Symbols As Marked on Equipment
DANGER - High voltage. Use the Proper Fuse
Protective ground (earth) terminal . To avoid fire hazard, use only the fuse of correct type,
voltage rating and current rating as specified in the parts
ATTENTION - refer to manual . list for your product .
Refer fuse replacement to qualified service personnel .
Power Source
This product is intended to operate from a power source
Do Not Operate in Explosive Atmospheres
that will not apply more than 250 volts rms between the
supply conductors or between either supply conductor To avoid explosion, do not operate this product in an
and ground . A protective ground connection byway of the explosive atmosphere unless it has been specifically
grounding conductor in the power cord is essential for certified for such operation.
safe operation .
Do Not Operate Plug-In Unit Without Covers
Grounding the Product
To avoid personal injury, do not operate this product
This product is grounded through the grounding conduc- without covers or panels installed. Do not apply power to
tor of the power cord . To avoid electrical shock, plug the the plug-in via a plug-in extender .
@ AUG 1980
TG 501
SERVICE SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Refer also to the preceding Operators Safety Summary.
Do Not Service Alone Disconnect power before removing protective panels,
soldering, or replacing components .
Do not perform internal service or adjustment of this
product unless another person capable of rendering first
aid and resuscitation is present. Power Source
This product is intended to operate from a power source
that will not apply more than 250 volts rms between the
Use Care When Servicing With Power On
supply conductors or between either supply conductor
Dangerous voltages exist at several points in this product . and ground . A protective ground connection byway of the
To avoid personal injury, do not touch exposed connec- grounding conductor in the power cord is essential for
tions and components while power is on . safe operation .
@ AUG 1980
TG 501 Time Mark Generator
Section 1-TG 501
SPECIFICATION
INTRODUCTION
Description
The TG 501 is a general purpose Time Mark Generator waves are selected by self-canceling push-buttons when
plug-in designed to operate in a TM 500 Series Power the rotary switch is in the 521n position .
Module . A Variable Timing Readout provides a simple but
accurate means of measuring timing errors over t7.5%
minimum range. Since many specifications are given in All outputs are available at the front-panel connectors,
percentages, the error readout eliminates the need for or by modification at the interface connector, located at
computations and, additionally, lessens parallax dis- the back of the plug-in, and the TM 500 Series Power
crepancies. Module .
Marker selection from 5 s through 1 ns in a 1, 2, 5, Power supplies are current limited . The 5 V supply is
sequence is available . 5 s through 10 ns markers are over-voltage protected to avoid damage to the integrated
selected by a rotary switch . 5, 2, and 2 ns modified sine circuits.
Table 1-1
ELECTRICAL CHARACTERISTICS
Characteristics Performance Requirements Supplemental Information
Markers 5 s through 1 ns in a 1, 2, 5 5 s through 10 ns are selected
sequence . by a rotary switch . 5 ns, 2 ns,
and 1 ns are push button selected
modified sine waves.
Marker Amplitude >1 V peak on 5 s.through 10 ns
markers. >750 mV peak-to-peak into
50 O on 5 ns and 2 ns markers .
>200 mV peak-to-peak into 50 S2
on 1 ns markers.
Trigger Output Signal Slaved to marker output from 5 s Amplitude same as marker amplitude.
through 100 ns . Remains at 100 ns
for all faster markers.
Internal Reference Standard Option 01
Crystal Frequency 1 MHz 5 MHz
Stability (0