[Test-Equipment] Re: 141T problems

[Carl Walker]

Hi folks. Thanks for all the answers and insights. Here's the scoop so far;

I was incorrect when I stated my 8553L worked with my 8444A - it was my 8554 
plug-in that I tested with the high frequency TG. Such is my memory after 
packing the gear up and moving it from one house to the next - details seem 
to get lost ;-)

I don't have manuals for either of the TGs, or any of the plug-ins. I'd like 
to acquire them if the cost was not prohibitive.

I took a look at the '53 plug-in with the connector on the back, and it is 
missing one coax insert and cable (the black one) which is indeed in the TG. 
This cable is marked 3 MHz inside the TG where it terminates. 

I did check out the connectors and cabling from the back of the plug-in slot 
in the 141T to the TG end of the connecting cable, and that all checks out 
fine.

I think the attenuators in the TG box are fine - since changing them in 
either 10 or 1 db steps varies the "noise" I'm seeing on the output.

There really doesn't seem to be all that much in the way of signal level 
coming out of any of the cabling from the plug-in - I'd expect the LO outputs 
to have some measurable level  - but I really didn't see all that much there 
when I went looking. I'm going to take another look at those signals, along 
with looking at the sweep and blanking signals - and I didn't see all that 
much there, either. Perhaps this plug-in is simply toast - but I really doubt 
that all the outputs would have been damaged.

If I can figure out what's going on there, I guess then next thing would be 
to try and add the required 3 MHz output to the plug-in connector. Does 
someone have a web pointer for any of this documentation?

Thanks,

Carl