Verifying The A8 Analog If Assembly Signal Path; Analog If Assembly Quick Check - Agilent Technologies PSA Series Service Manual

Troubleshooting the IF Section

Verifying the A8 Analog IF Assembly Signal Path

Verifying the A8 Analog IF Assembly Signal
Path
This procedure assumes the A10 3rd Converter assembly is functioning
correctly. To verify proper 3rd Converter functionality, refer to the
"Verifying the A10 Third Converter Board E4440A, E4443A, E4445A,
E4446A, E4448A)" on page

Analog IF Assembly Quick Check

1. Inject a −25 dBm, 50 MHz signal into the RF input of the
instrument.
2. Press on the instrument and tune to 50 MHz by pressing
Preset
, ,
Input Input Port RF
3. Press and set the input attenuation to 0 dB.
Amplitude
4. Disconnect the flexible gray cable (W10) going into the A7 digital IF
assembly at A7P1. Refer to
locations.
5. Connect a calibrated spectrum analyzer to the end of this flexible
cable, and measure the 7.5 MHz output from the analog IF assembly
going to the digital IF assembly.
6. If the analog IF assembly is operating properly, the 7.5 MHz 4th IF
out of the Analog IF assembly will measure −23 dBm ±1 dB, on the
calibrated spectrum analyzer.
7. Reconnect the cable to A7P1.
136
129.
, .
Frequency 50 MHz
Figure 10-21 on page 282 for cable
Chapter 6