Anritsu 37 D Series, Maintenance Manual

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TROUBLESHOOTING NON-RESPONSE OR OTHER UNUSUAL BEHAVIOR
37XXXD MM 7-13
Fails in
Forward only ?
Fails below 38
GHz?
Fails above 38
GHz?
Fails above 38
GHz?
Normal power at
Port 1 (S21)?
Normal power at
Port 1(S21)?
Normal power at
Port 1(S21)?
Sampler/
DownConversion
Module, A4 or A8
failure
A8, A4, or Sampler/
DownConversion
Module failure
transfer sw or A8
failure
not logical
Sampler/
DownConversion
Module, A4, or A8
failure
Ref A MUX coupler
failure
SPDT switch, Ref A
SQM, A8 or MUX
coupler failure
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
1
Go to
2
Figure 7-2.
Error Code DE Lock Failure Troubleshooting (50 and 65 GHz models only) (2 of 3)