Table 2-7 Recommended adjustment for performance test failure
(option 115/117/135/137/215/217/235/237)
Test Num.
First failed test Recommended adjustment
Oven reference
Frequency reference
Local gain
Receiver IF Range
Compression
Receiver absolute gain Rch
Synthesizer gain
Source output power
Receiver port characteristics
Receiver absolute gain Tch
1 Frequency accuracy
test
√
2 RF output level
accuracy test
√ √ √ √
3 RF output level
linearity test
4 Crosstalk & system
dynamic range test
√
5 Noise Floor Test √
6 Trace Noise Test
7 Dynamic Accuracy
Test
8 Compression √ √
9 IF linearity at
1.195GHz
√
10 IF linearity at LF √ √
11 Uncorrected System
Performance test
√ √
44 Chapter 2
Troubleshooting
Performance Test failure Troubleshooting
Performance Test failure Troubleshooting
Table 2-8 and Table 2-9 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 other assembly may
be faulty. To troubleshoot further, perform the Diagnostic Test procedures.
NOTE When Crosstalk, System dynamic range or Uncorrected system performance test fails,
check first whether the connections of the RF semi-rigid cables between the suspicious