Anritsu 373XXA - Manual (Page 69)

TROUBLESHOOTING SYSTEM HAS ERROR CODE
373XXA MM 5-15
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)?
Buffer Amp, A4 or
A8 Failure
A8, A4, or Buffer
Amp Failure
Transfer Switch
or A8 Failure
Buffer Amp, 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
Not logical. Call
Customer Service
See Sheet 3
From Sheet 1
Figure 5-2. Error Code DE Lock Failure Troubleshooting (37397A) (2 of 3)