
3. Preliminary Display Adjustments (SN 3001A and Below)
Procedure
X
and
Y
Deflection
1. Connect a 10: 1 (10
MQ)
divider probe to the oscilloscope’s channel
Amplifier
Pulse
1 input and a
1O:l
divider probe to the channel 4 input.
Response
Adjustments
2. On the oscilloscope, press
CRECALL]
[GK]
to perform a soft reset.
3.
On the oscilloscope, press
(CHAN]
more preset probe , select
channel 1, and use the front-panel knob to select a 10: 1 probe.
4. Select channel 4, and use the front-panel knob to select a 10: 1
probe.
5.
Press
@iGiQ
6. Connect the channel 1 probe to the oscilloscope rear panel PROBE
COMPENSATION AC CALIBRATOR OUTPUT connector. Press
[AUTO- SCALE). Adjust the channel 1 probe for an optimum square
wave display on the oscilloscope.
7. Connect the channel 4 probe to the oscilloscope rear panel PROBE
COMPENSATION AC CALIBRATOR OUTPUT connector. Press
[AUTO- SCALE). Adjust the channel 4 probe for an optimum square
wave display on the oscilloscope.
Note
Each probe is now compensated for the oscilloscope input to which it
is connected. Do not interchange probes without recompensating.
8. Connect the channel 1
1O:l
divider probe to AlA4E1,and the
channel 4 probe to
AlA4E2,
as shown in Figure 3-16. Connect
the probe ground leads to chassis ground. See Figure 3-17 and
Figure 3-18 for the location of the assemblies and test points.
DICITIZINC
OSCILLOSCOPE
PULSE/FUNCTION
GENERATOR
I
SPECTRUl
ANALYZER
OUTPUT
Figure 3-16. Preliminary Display Adjustments Setup
9. Set the spectrum analyzer LINE switch to STANDBY. Remove the
cover over A3 Digital Storage Section and remove
A3A2
Intensity
Control Assembly. Insert the Display Adjustment PC board (HP
part number 85662-60088) into the
A3A2
slot. See Figure 3-17 for
the location of the
A3A2
assembly.
Adjustments 3-49
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