1. Position trace to the center horizontal graticule line.
2. Adjust TRACE ROTATION so the trace is parallel to
the center horizontal graticule line.
Channel 1 and Channel 2 Step Attenuator Balance
(Figure 11)
1. Obtain a free-running trace.
2. While switching the CHI (CH2, if applicable)
VOLTS/DIV switch between the 20m and 5m position, ad
just the CHI STEP ATTEN B A l for minimum trace shift
between these positions.
Vertical System
Demonstrate the operation of the vertical deflection
system controls as follows:
1. Connect 10X probe from CHI INPUT connector to
the .3V CAL OUT jack.
2. Set Trigger Mode to NORMal and TRIGGER LEVEL
for a stable square wave display.
VOLTS/DIV to 10m.
4. Adjust the horizontal POSITION control so the dis
play begins at the left vertical graticule line.
5. Rotate CHI POSITION control fully counterclock
wise and fully clockwise settings. The display should move
o ff screen in both vertical directions. Adjust for a normal
centered display.
6. Adjust the CHI POSITION for an equal deflection
above and below the center horizontal graticule line. The
display should total approximately three vertical divisions
in amplitude and full cycle pulse width approximately
two divisions wide. This corresponds to .3 volts, 1 kilo
hertz calibrated square wave output (refer to Application
and Measurements Section of this manual for peak-to-peak
amplitude, time duration and frequency measurement
formulas).
7. Set CHI Vertical Coupling to GND and note position
of the baseline trace. Set Coupling to AC. The display should
be equally deflected above and below the reference base
line trace position. Reset Coupling to DC.
18
305 Operators
REV A SEP 1979
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