HP 5334B Service Manual page 93

NOTE
The
10
dB attenuator is used here for impedance matching.
Procedure:
1. Connect the Signal Generator output to the Power Sensor/Power Meter as shown in Figure 5-12.
2. Set the Signal Generator output Frequency to 990 MHz.
3. While observing the display on the HP 436A Power Meter, adjust the amplitude of the output signal for a
power reading of -30.73 dBm -c 0.1 dBm, which is equivalent to 6.5 mV rms
-+ 0.12 mV. If your HP 5334B
has Option 60, rear panel inputs, then adjust the amplitude for a power 29.73 dBm
5
0.1 dBm (equivalent
to 7.3 mV rms
2
0.12 mV).
4. Now, connect the Signal Generator output to the 5334B's INPUT C through the HP 8491A 10 dB attenuator
as shown in Figure 5-12.
5.
Connect the Time Base Out of the 5334B to the Time Base In of the Signal Generator as shown in
Figure 5-12.
6. Set the 5334B as follows:
FUNCTION
................................
FREQ C
GATE TIME
...................................
1.3 Seconds
CAUTION
For 5334Bs containing
A1
Main Boards that are Revision C and below,
take the following precaution:
In the next step (7), R319
(10
ohm resistor) will short out, if R328 is
left too long in its fully clockwise position. To prevent this, quickly
perform steps 7 and 8.
7. Adjust R328 fully clockwise.
8. Adjust R328 counter clockwise until the 5334B just starts to gate (GATE LED will flash).
9. Verify that the 5334B front panel displays 990.000 000 MHz
+
2 Hz.
This concludes the Channel C Peak Detector Adjustment.
HP 5334B
-
Scrvicc Manual
5-21