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SYSTEM HAS ERROR CODE TROUBLESHOOTING
5-14 373XXA MM
Fails both
Forward and
Reverse?
Lock Failure DE
Code 6XXX)(Error
Fails below
38 GHz?
Fails above
38 GHz?
Fails above
38 GHz?
Normal power at
Port 1?
Normal power at
Port 1?
Normal power at
Port 1?
OK 40MHz
to 272MHz?
PowerAmp or
LO1 Failure
BufferAmp,A4
orA8 Failure
A8, BufferAmp
Failure
SDM, SW filter, Xfer
Switch, or source
PCB failure
Not logical. Call
Customer Service
BufferAmp, Power
Amp, orA1 Failure
A8,YIG Osc, SW filter,
or Source PCB Failure
SPDT Switch, SW
Filter,A8 or Source
PCB Failure
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Yes
Yes
NOTE: Sampler/Buffer amplifiers are individually matched to
Power Amplifiers. If either fails, both should be replaced with
another matched set, part number ND53249.
Go to
1
See Sheet 2
Figure 5-2. Error Code DE Lock Failure Troubleshooting (37397A) (1 of 3)