Horizontal System - Tektronix 7B92A Maintenance Manual

Equipment Required
1. Oscilloscope
2. Wide-band Vertical amplifier plug-in unit
3. Time-mark generator
4. Calibration generator
C1. Set Basic Sweep Calibration
a. Set the 7B92A controls as follows:
MAIN TRIGGERING
SLOPE
LEVEL
MODE
COUPLING
SOURCE
Sweep Controls
POSITION
TIME/DIV OR DLY TIME
DLY'D Time/Division
Delayed Triggering
LEVEL
SLOPE
COUPLING
SOURCE
TERM
b. Connect the time-mark generator to the vertical
amplifier plug-in unit input with a 50-Ω cable. Set the
time-mark generator for 1 ms markers.
c. Set the oscilloscope intensity and focus
controls for a desired display.
C.

HORIZONTAL SYSTEM

+
Midrange
NORM
AC
INT
Midrange
1 ms
1 ms (knob in)
RUNS AFTER
DELAY TIME
+
AC
INT
Inputs
1 MΩ (pushbutton in)
Performance Check/Calibration-7B92A
5. 50-Ω termination
6. 50-Ω cable
7. Screwdriver
d. Set the vertical amplifier plug-in unit for
approximately two divisions of display. Position the
display in the center graticule area. Set the MAIN
TRIGGERING LEVEL control for a stable display
(TRIG'D light on).
e. Set the front-panel SWP CAL adjustment for
one marker/division over the center eight divisions
(position as necessary).
C2. Check Alt Off Function
a. Check-for Delaying sweep (with intensified
zone) positioned at least 3.5 divisions above Delayed
sweep.
c. Check-that Delaying sweep (with intensified
zone) is not alternating with Delayed sweep, and no
readout exists.
C3. Adjust DTM Scale and Delay Start
a. Set the DLY'D Time/Division switch to 10 /s;
set the TRACE SEP control fully clockwise.
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