Performance Tests Failure Troubleshooting; Troubleshooting For Performance Test Failure - Agilent Technologies E4991A Service Manual

Troubleshooting

Performance Tests Failure Troubleshooting

Performance Tests Failure Troubleshooting
Perform the following procedure sequentially when any performance tests fail.

Troubleshooting for Performance Test Failure

Table 4-3 gives the recommended adjustments when the performance test fails. You should
perform the corresponding adjustments using the Spot Adjustment in the Adjustment
Program as shown in Table 4-3. If the performance test still fails, replace the assembly as
shown in Table 4-4. Note that this table lists some typical cases. In a few cases, other
assembly may actually be faulty.
Table 4-3 Recommended Adjustment for Performance Test Failure
1
2
3
4
Table 4-4 Isolate Faulty Assembly for Performance Test Failure
Test
1
2
3
4
†††
: Suspicious assembly
††
196
Test First Failed Test
No.
Frequency Accuracy Test (Std)
Frequency Accuracy Test (Opt. 1D5)
OSC Level Accuracy Test
Impedance measurement accuracy test
DC Bias Level accuracy Test (Opt.001)
First Failed Test
No.
Frequency Accuracy Test (Std)
Frequency Accuracy Test (Opt. 1D5)
OSC Level Accuracy Test
Impedance Measurement Accuracy Test
DC Bias Level Accuracy Test (Opt. 001)
: Most suspicious assembly
Recommended Adjustment
(Spot Adjustment in Adjustment Program)



Probable Faulty Assembly
A1 Ref A3 A4
OSC Source Receiver
†††
†††
†† †††


A2 DC A5 Freq
Bias(001) Ref(1D5)
†††
†††
Chapter 4