Products > Test Equipment
Rohde & Schwarz CMU200
Kribok:
With my little experience with CMU 200, I will first see the reinstallation of the software, because it will probably be easier. Thank you for the instructions, I'm reading them.
In my CMU 200, from the moment the ON button is turned on, it takes about 8 minutes to fully standby. After activating the spectrum analyzer, it works normally, you can change the values of the RF generator, but when you turn on the RF ON generator, the entire CMU is suspended.
When I bought it, it worked normally and quickly turned on, after a week of use something changed.
In the middle of the module located closest to the power supply, on one of the tiles I found such a button?
Kribok:
At the beginning, the CMU worked normally, after a week of its purchase, the RF generator stopped working and a message appeared - photo 01
In my CMU, such modules are installed - picture 02
Since the appearance of this board, about 8 minutes will pass until full launch - picture 03 - 04
After starting the self test, the CMU hangs on the '' Diagnostic CMU -B56 Var14 '' message - photo 05
I made a reinstallation - photo 06
After starting the system a message appeared - photo 07
I turned off and turned on the CMU 200, after restarting the system (as before 8 minutes) the RF generator does not work.
I am looking for information on error codes, but it is probably only Rohde & Schwarz who has access to them?
If it is the fault of the software, then with the help of colleagues, you can try to fix it, and if it is a malfunction of a module, then only the replacement of it comes into play. After cleaning the modules, I saw how complicated the CMU is and why the price of the new device is so high. In the radioamateur studio, we can use the spectrum analyzer and RF generator for our home tests if you can buy a second-hand CMU at an affordable price.
I am very happy to hear the proposals on how to repair my CMU!
_Wim_:
Disclaimer first: I am no specialist of the CMU200, just looking at the service manual (http://gotroot.ca/cmu200/CMU_Service.pdf)
Option CMU-B56- appears to be a plug-in module of the signalling card (B21):
Option POWER PC
R&S CMU-B56 Var14
The option POWER PC R&S CMU-B56 Var14 is directly inserted on
the UNIV. SIGN. UNIT. It performs WCDMA signaling function.
So would it not be possible to remove this option module only? My CMU does not have one, but still the signal generator can be used.
According to the above service manual, this module should have the following number:
1122.9737.22
EE POWER QUICC II MODUL
POWER QUICC II MODUL
included in CMU-B56/MOD14
So if you open up the B21 module, I would remove the module labeled with "1122.9737.22", but as stated above, I say this from only looking at the manual, no real experience in doing this.
Qw3rtzuiop:
You didnt update the firmware. It is still an old version. The newest should look like this:
Kribok:
Yes, I did not want to change the software, just verify it, as my colleagues suggested.
I take all the hints into account, because I do not know about programming, if I need it I will buy a PCMCIA module and I will make the software update to the latest one.
All hints and suggestions are very welcome.
Thank you very much .
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