Products > Test Equipment
Rohde & Schwarz CMU200
msraya:
Hello dcarr:
I'm using a genuine Agilent GPIB <-> USB adapter and I don't have any problems. The CMU200 uses GPIB multiple addressing, so if you use a third party not full GPIB adapter you will have problems. The sweep rate is slow. You can forget to have real time sweep.. but it is working, and I think the precision is enough.
I will try to program my own software when I can..
Thanks, ZL1CVD, but I do not have folder bios... so I think your unit is newer... You can drop me the files, but I'm afraid to use the wrong bios image and convert my unit in an expensive paperweight. HI HI..
What happens if I use a image from another unit in my unit?? It can boot? Or it needs proper serial numbers?? I will lost the calibration?? Someone Try this?? :blah:
Manuel
ZL1CVD:
From what I understand, calibration is stored in EEPROM on each R&S module installed. When you change a module, you run VersionManager (press menu/select key while DOS R&S boot screen shows). When VersionManager starts up, you then select "Firmware upgrade after board change" and this rebuilds what R&S refer to as 'tables' - I assume these 'tables' to be the module specific calibration data.
I have connected the HDD from a CMU200 to a CRTU-RU and it booted up fine. I wanted to see if there were any options in the latest DOS software to handle switching in the B17 Analogue I/Q IF interface that is installed in my CRTU-RU. I could not find anything. I can only find a Windows application to control this. I'll read manuals more but suspect GPIB will have everything I need.
msraya:
Thank You ZL1CVD for your advice! I made a Firmware Upgrade Change to try to upgrade the B41 firmware and It worked. But I cannot see any changes...
I update today the SW with the help of Wim and the Remote Service Tool.. When the update process finished, the unit not boot anymore.. :wtf:
I get the HDD and when I put on PC I see that the data are destroyed.. so a faulty HDD perhaps... Then I write on it the backup version that I have and the unit come to life.. :clap:
So.. no HDD faulty.. Wrong update process?? I don't know..
I want to update firmware for B41 option from 3.03 to upper level, for extract SINAD result by GPIB, but no luck... The software upgrade doesn't upgrade the internal B41 firmware :-//
When I receive another TOSHIBA HDD that I buyed I would try to upgrade again and install partition magic and a Windows 2000 partition.. I will need software for Windows 2000 that I doesn't have... If someone have?
If I success at it I will make a short tutorial of the process for all the CMU200 users over there.. :popcorn:
By the way.. Someone knows how to use the Frontal Speaker with the B41 application???
I looked for GPIB commands or application options with no avail... :--
Manuel
hoangviet:
--- Quote from: richnormand on May 30, 2016, 04:32:43 pm ---Hi hoangviet,
I seem to have a related issue with my CMU200. Although I think the standby supply is working and it is the secondary supplies that do not start. Either it does not get the power on signal or there is somthing wrong with the power-good signal. I removed all modules from the motherboard in case of a short, but, no luck. Could you read my post and feedback any thoughts you might have. Since I do not have any pinouts on the plugs or schematics it will require lots of tracing, assuming the front control panel is not the cause.
https://www.eevblog.com/forum/repair/rohde-schwartz-universal-radio-communication-tester-cmu200-psu-issues/
Anyone else with any experience fixing the CMU200 PSU here? Please chime in.
Cheers and thanks.
https://www.eevblog.com/forum/repair/rohde-schwartz-universal-radio-communication-tester-cmu200-psu-issues/
--- End quote ---
Hi richnormand,
When i received my CMU200, the unit was totally dead, there was no LED light up when i plug in the power. Also i have another unit that does power on but the screen is dark. When i take a closer look at the LCD, i still see the image but the backlight is dead because of the inverter board which easy to repair. You should check your CMU200 by using a flashlight on the LCD, hope your unit have a same problem :)
cio74:
Does anyone tried to use the spectrum below 10Mhz? Or/and power meter?
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