Products > Test Equipment

Rohde & Schwarz CMU200

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Qw3rtzuiop:
The soldering at the yellow tantalum cap looks sketchy.

Kribok:
I checked this with a multimeter, and it turned out that there is a short circuit, just like you, I thought it was a tantalum capacitor, but after desoldering the PCB did not work, as before. The colleague dismantled this PCB from his CMU and soldered it something, because it also showed a short circuit, but the PCB was working and working in CMU, it turned out that it has an inductance, i.e. a choke! That's why I sold it back to my PCB.
Greetings.

Ivan_Vetrov:
Hello! How to make a calibration after replacing the hard drive? I now have the level of the generator from the level of the analyzer differs by 3 dB. When the generator level is set to -27 dB, the analyzer level is -30 dB. The D-Line marker shows -22 db. What do I need to do to calibrate?  |O Thank .

Kribok:
Thank you very much for the positive transaction and delivery of a working PCB to my CMU 200.
Now the RF generator works like new.
The repair of my CMU is closed, but no further modifications, I really like this machine and it is worth attention!
Thank you again to the Ice-Tea forum user
Greetings to all Kribok

W3AXL:
Hi all!

Wondering if anyone is using their CMU200 with an external reference. I've got an HP Z3801 feeding into the unit at the REF IN port, and I keep getting "Reference frequency not locked" on the screen when I select external reference mode. I've verified that the output of the 3801 is a clean sinewave at about 3.5V pk-pk. Is the CMU picky about its input waveform, or is something else up?

Cheers!

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