How Do I Verify That The Test Set Is Operating Properly?; Instrument Quick Check - HP 8920A User Manual

Chapter 1, Get Started

How do I Verify that the Test Set is Operating Properly?

How do I Verify that the Test Set is Operating Properly?

Instrument Quick Check

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S:\HP892XX\USRGUIDE\manual\getstart.fb
If your Test Set powers-up and displays the RX TEST screen, but you suspect an
instrument problem, use the Instrument Quick Check to verify operation of the
basic instrument functions.
If no failure is indicated by this test, but you still suspect a problem, refer to the
"Performance Tests" information in the Assembly Level Repair Manual.
1. Set up the quick check:
a. Connect a cable between the DUPLEX OUT and ANT IN ports.
b. Turn instrument power on (if it is not already on).
c. Press PRESET.
d. Press DUPLEX to access the DUPLEX TEST screen.
e. Set the Tune Mode field to Manual.
f. Set the Tune Freq field to 825 MHz.
g. Set the Input Port field to Ant.
h. Set the RF Gen Freq field to 825 MHz.
i. Set the Amplitude field to -10 dBm.
j. Set the Output Port field to Dupl.
k. Verify that AFGen1 Freq is set to 1.0000 kHz, and that AFGen1 To is set to
FM and 3.00 kHz.
l. Set the AF Anl In field to FM Demod.
m. Set the Filter 1 field to 300Hz HPF.
n. Set the Filter 2 field to 3kHz LPF.
o. Verify that De-Emphasis is Off.
p. Set the Detector field to Pk+-/2.
q. Turn the VOLUME knob clockwise until you hear a tone (1 kHz default for
AFGen1 Freq).
2. Check the following readings:
SINAD should be >35 dB.
FM Deviation should be about 3.0 kHz.
3 Access the OSCILLOSCOPE screen using the To Screen menu. With the default
Vert/div setting of 2 kHz and a default Time/div setting of 200 µs, you should
see two complete sinewaves across the screen.
4 Access the SPECTRUM ANALYZER
an 850 MHz FM carrier.
1. Optional on some Test Set models.
1
using the To Screen menu. You should see