
3. Preliminary Display Adjustments (SN 3004A and Above)
Procedure
X
and
Y
Deflection
1. Connect a 10: 1 (10
Ma)
divider probe to the oscilloscope’s channel
Amplifier
Pulse
1 input and a 10: 1 divider probe to the channel 4 input.
Response
Adjustments
2. On the oscilloscope, press
[RECALL)
[ZK)
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
1O:l
probe.
5. Press
@iG].
6. Connect the channel 1 probe to the oscilloscope rear panel PROBE
COMPENSATION AC CALIBRATOR OUTPUT connector. Press
CAUTO-
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
AlA2TP204,
and
the channel 4 probe to
AlA2TP205,
as shown in Figure 3-23.
Connect the probe ground leads to
AlA2TP106.
See Figure 3-24
and Figure 3-25 for the location of the assemblies and test points.
SPECTRIJY ANALYZER
L
WIrYI
500
TERYINATION
PULSE/FUNCTION
GENERATOR
Figure 3-23. 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 3-24 for
the location of the
A3A2
assembly.
Adjustments 3-57
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