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THE SERVICING INSTRUCTIONS CONTAINED IN THIS MANUAL ARE FOR
USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK, DO
NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE
OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
LBO-516 100 MHz
DELAYED TIME BASE OSCIILOSCOPE
TABLE OF CONTENTS
1. GENERALINFORMATION........................................................................................................................................1
1-1 INTRODUCTION ................................................................................................................................1
1-2 SPECIFICATIONS ...............................................................................................................................................1
2. OPERATING INSTRUCTIONS..................................................................................................................................3
2-1 FUNCTION OF CONTROLS, CONNECTORS, AND INDICATORS .......................................................... 3
2-1-1 Display Block ........................................................................................................................................... 3
2-1-2 Vertical Amplifier Block ........................................................................................................................... 4
2-1-3 Sweep and Trigger Blocks ......................................................................................................................... 5
2-1-4 Miscellaneous ........................................................................................................................................... 7
2-2 INITIAL OPERATION ................................................................................................................................ 7
2-2-1 Power Connections and Adjustments ......................................................................................................... 7
2-2-2 Installation ................................................................................................................................................ 8
2-2-3 Preliminary Control Settings and Adjustments ........................................................................................... 8
2-3 BASIC OPERATING PROCEDURES ......................................................................................................... 9
2-3-1 Signal Connections ................................................................................................................................... 9
2-3-2 Single-trace Operation ..............................................................................................................................11
2-3-3 Triggering Alternatives ............................................................................................................................11
2-3-4 Probe Compensation ................................................................................................................................14
2-3-5 Dual-trace Operation ................................................................................................................................15
2-3-6 Additive and Differential Operation ..........................................................................................................16
2-3-7 Triple-trace Operation ..............................................................................................................................17
2-3-8 Four-trace Operation ................................................................................................................................17
2-3-9 Delayed Timebase Operation ....................................................................................................................18
2-3-10 Single-shot Operation .............................................................................................................................20
2-3-11 X-Y Operation .......................................................................................................................................20
2-3-12 Intensity Modulation ..............................................................................................................................20
2-4 MEASUREMENT APPLICATIONS ...........................................................................................................21
2-4-1 Amplitude Measurements .........................................................................................................................21
2-4-2 Differential Measurement Techniques .......................................................................................................22
2-4-3 Time Interval Measurements ....................................................................................................................23
2-4-4 Phase Difference Measurements ...............................................................................................................24
2-4-5 Distortion Comparison .............................................................................................................................26
2-4-6 Frequency Measurements .........................................................................................................................27
2-4-7 Risetime Measurements ............................................................................................................................27
2-4-8 -3dB Bandwidth Measurement ..................................................................................................................28
1. GENERAL INFORMATION
1-1. INTRODUCTION
1-2. SPECIFICATIONS
The LBO-516, shown in Figure 1-1, is a 100 MHz oscilloscope Specifications for the model LBO-516 oscilloscope are given in
with all of the features normally found on a lab-grade scope: high- Table 1-1.
fidelity pulse response, stable operation, dual timebase with
calibrated sweep delay, flexible triggering facilities, and a bright Table 1-1
CRT display with illuminated internal graticule. Moreover, it also has SPECIFICATIONS
a very unusual feature found on few scopes in any price class: it can Vertical Amplifiers (Ch. 1 & 2)
simultaneously display up to eight traces from three different input
signals! In addition to the two vertical-input channels and their differ- Bandwidth (-3 dB)
ence signal, the signal used to externally trigger the main timebase DC coupled DC - 100 MHz
can also appear on the CRT display. The alternate sweep mode, AC coupled 10 Hz - 100 MHz
which allows the main and delayed timebases to simultaneously Rise Time 3.5 KS
sweep the CRT, effectively doubles this four-trace display to an Deflection Coefficients
eight-trace display.
The comprehensive triggering facilities of the LBO-516 include Accuracy 5 mV/div to 5 V/div in 10 calibrated
several features that ease the problem of triggering on complex steps, 1-2-5 sequence. Continuously
signals: a variety of frequency-selective coupling filters, a trigger variable between steps. XI0
holdoff-control, and a trigger pickoff that alternates between the two magnification adds 0.5, 1, and 2
vertical channels. mV/div steps for frequencies below 5
MHz
Input Impedance -+3%; -+5% with Xl0magniflca-tion
1 megohm +-2%, 25 pF +-3 pF
Maximum Input Voltage 400 V (DC plus AC peak)
1
Signal Delay Leading edge displayed. Modes Auto, Normal, Single-shot
Leading edge displayed. CH-1 only, CH-2 only, Coupling AC, DC, HF reject, TV vertical, TV
CH-1 & CH-2 displayed alternately, horizontal
CH-1 & CH-2 chopped (at 250 Slope + or-
kHz rate), Holdoff Normal, Variable (to greater than
CH-1 & CH-2 added, CH-1 & one sweep), B ends A
CH-2 subtracted, Sensitivity
CH-1 & CH-2 & CH-3 displayed Internal Trigger DC