Hi,
My HP 8341B is showing unlock message in certain frequency bands such as:
1.1GHz - 2.4 GHz
4.73 GHz - 7.0 GHz
9.57 GHz - 13.5 GHz
14.5 GHz - 20 GHz.
The 6.99999 GHz is unlocked but 7.0000 GHz is locked so at a minimum it has to do with what band is selected.
I have gone through some of the service level steps to check certain voltages like Pretune, VDAC etc.
I admit I do not have a complete understanding of the machine yet (fairly new to all this), but I was hoping someone could nudge me in the right direction.
I bought the unit in a non-functioning state, No display showing, SHIFT-M4 functional tests with multiple fails, AC voltage transformer wires mistakes and more. I have sorted through those, i.e. SHIFT-M4 shows PASS on all tests, I have a functioning display etc.
I don't know the state of the YO, but from my limited spectrum analysis up to 5 GHz, I can see there is a peak at approximately the frequency of interest. My frequency counter also shows spot-on frequencies when locked, and several tens of MHz off, when unlocked.
The YO is the only lock is that does not seem to fully lock, i.e. REF, M/N, HET, etc seem to lock.
Also, does anybody know what YOs are compatible with the 8341B? Is is only the 5086-7430 listed in the manual or are there possibly other 2.3-7.0 GHz that can be used?
All comments, questions and pointers are welcome.
saevar
