OK -
First confirm the gain of the YTF. There should be an expected signal level specified and the expected output (input to the next stage) - you should be able to calculate the stage gain; then measure it. If it is low, look ad the drive signals - the problem could be the logic signals to the YTF - quit a bit of work to do B4 you decide the YTF is the problem.
I have not worked on this particular device so someone with more experience on the 8594E might be a better resource.
The fun is starting :-)
Cheers!
Bruce
Quoting Rik Rasmussen <rikrasmussen@...>:
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When I said I was feeding the First Converter, that was apparently icorrect. I was looking at the wrong block diagram. I am now looking at the block diagram for the 8594E. The block diagram does include the tracking generator although my unit does not have that option.
After looking at the output of the attenuator and checking that it is stepping correctly, I then inserted the CAL OUT signal directly to the next stage after the attenuator. According to the block diagram that is a "SWITCHED YTF". Feeding at that point I am seeing a low signal on the display and reading is very low.
