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Flatness adjustment not possible any more on hP / Agilent 8564E
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hafrse:
Hello,
I am trying to adjust the flatness on my 8564E but did not work:
If I choose a band #3 and try to adjust the DAC at the specific frequency 12.4Ghz , previous DAC value was 3501 , if I change to 3256 and can see the trace within the flatness menus at the wanted level , save and exit.
Now measuring the same frequency @12.4Ghz still shows level value which was on DAC 3501! going back to the flatness cal menu and set back band #3 12.4Ghz , the level is correct within that menu and the DAC value is 3256 (the new value) .
I tried values like 100 and 4995 , DAC value will be saved but trace still the same at 12.4Ghz. any clue what that can be?
However, in the low band mixer (9kHz-3GHz) it is possible to adjust and see the results without any problems.
Where do I find the flatness compensation DAC ?
Thanks for any advice!
George
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