Agilent Technologies 4352B, Service Manual

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SP AN 100 kHz
RBW 1 kHz
REF LEVEL 0 dBm
6. Turn the 4352B power on.
7.
Set the RF attenuator according to the following table by pressing 4
Sense Range
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNN
RF ATTEN ,
and entry keys , and record each 30 MHz peak value of each RF attenuator setting of the
spectrum analyzer as LEVEL(0) through LEVEL(25).
RF A TTEN Record peak value @ 30MHz as:
0 dB LEVEL(0)
5 dB LEVEL(5)
10 dB LEVEL(10)
15 dB LEVEL(15)
20 dB LEVEL(20)
25 dB LEVEL(25)
8. Calculate the following formula, and conrm that each calculated value is within the range
of the limits .
F ormula Limits
LEVEL(0) -12 dBm LEVEL(0) -2 dBm
LEVEL(5) - LEVEL(0) + 5 = A -1.5 dB A 1.5 dB
LEVEL(10) - LEVEL(0) + 10 = B -1.5 dB B 1.5 dB
LEVEL(15) - LEVEL(0) + 15 = C -1.5 dB C 1.5 dB
LEVEL(20) - LEVEL(0) + 20 = D -1.5 dB D 1.5 dB
LEVEL(25) - LEVEL(0) + 25 = E -1.5 dB E 1.5 dB
9. Turn the 4352B power o.
10. Disconnect the cable from the connector \J", and reconnect the cable \J".
11. Decide which assembly is faulty according to the following guideline .
If all tests pass , continue with the next step .
If all fail, replace the A10 1st Mixer assembly .
If only LEVEL(0) fails , replace the A10 1st Mixer assembly .
Otherwise , replace the A8 RF attenuator assembly .
7. Check the Residual FM
P erform the following steps to checks that the residual FM is within the limit.
1. Connect the test equipment as shown in Figure 8-8.
8-12 Receiver Group T roubleshooting