Chapter 4 79
Troubleshooting
Performance test failure troubleshooting
4. Troubleshooting
Adjustment failure troubleshooting
Table 4-4 represents the relationships between the failed adjustment and probably faulty
assembly. Note that this table lists some typical cases. There are possibilities that another
assembly may be faulty.
###: Most suspicious assembly
##: Suspicious assembly
#: Possible faulty assembly
Performance test failure troubleshooting
Table 4-5 represents the relationships between the failed test and probable faulty assembly.
If the performance test failure cannot be removed by a proper adjustment, replace the
assembly shown in this table.
Note that this table lists some typical cases. There are possibilities that another assembly
may be faulty.
Table 4-4 Adjustment failure troubleshooting information
Adj
Num.
First failed adjustment Probable faulty board assembly
A1 A2 A3 A4/5 A6
1 DC Control Voltage
###
2DC Power Voltage ###
3 DC Power Current ### ##
4 Reference Frequency # ###
5 Pre-LO Sampler PLL BW ###
6 Receiver DC offset # ###
7PM Offset ###
8 PM Linearity ###
9PM Temp ###
10 PM Flatness ###
11 Receiver RF Flatness # ## # ###
12 Receiver IF Gain/Flatness ## # ###
13 Receiver RF Dir Flatness # ## # ###
14 Receiver IF Dir Gain/Flatness ## # ###
15 LO Sampler PLL BW # ## # ###
16 Phase Noise BW # ### #
17 FLL BW # ### #
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