Products > Test Equipment

Rohde & Schwarz CMU200

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msraya:

The free software FreRes from Rohde & Schwarz allows to make sweep and test for example filters or duplexers.

Manuel

_Wim_:

--- Quote from: msraya on May 30, 2016, 08:51:12 am ---
The free software FreRes from Rohde & Schwarz allows to make sweep and test for example filters or duplexers.

Manuel

--- End quote ---

Thanks for the tip. I seem to remember this did not work in the previous version I had. Lastest version can be downloaded here: https://www.rohde-schwarz.com/us/applications/freres-program-for-frequency-response-measurements-application-note_56280-15551.html

richnormand:

--- Quote from: hoangviet on May 18, 2016, 03:40:44 pm ---Hi everybody

I just bought 3 dead CMU200 from a mobile company. They both had faulty PSUs but i manage to repair 2 of them which had issue with standby PSU, only faulty TOP200YN converter IC  :D

One unit had a Non-volatile Ram Empty error with Model CMU XXX and no Serial, work with only basic function, my guess would be the PSU fail at the time they update the firmware. In version manager i do see a choice to copy NVRAM to disk, but couldnt find the other way back  :-\

The other unit work ok with all software option at start, but after few days the start-up process stuck at BaseDiscoverOptionsEnd with the Link LED in Digital Board blink sometime, i had trace the problem to the Digital Board by exchange with other unit but dont have any info to debug it. Anybody have the same error like this one ?

--- End quote ---

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/

msraya:
Hello!

The HDD of my CMU200 is a HITACHI MK2018GAP with 20Gbytes but with only a 2GB partition  :-//.
I try a KingSpeed SSD PATA 32GB with no luck.
Also I try a hgst 40GBytes ATA from my old laptop with no luck.
I think It is possible to enter the disk geometry manually in Bios, but I do not have information about the parameters of the disks.

But It appears that the BIOS is very OLD and doesn't read new hard disk..
I will try with a Compact Flash Adapter...

I would install Windows 2000, but I need a DB9 mouse  |O. I open the mainboard FRM5+8B version to see that It has a only 128MB module from a two sockets, the Intel 430TX Triton chipset must have some USB ports, but where are theses ports????

I will upgrade the memory. However, the old MSDOS Software uses Pharlap DOS Extender and DPMI mode, using only 64Mbytes.. so not interesting to upgrade RAM unless The Old software works under Windows, that I think that is not possible...

So.. please..  some advice...
Thank You!!

Manuel

_Wim_:

--- Quote from: msraya on June 24, 2016, 06:48:50 pm ---Hello!

The HDD of my CMU200 is a HITACHI MK2018GAP with 20Gbytes but with only a 2GB partition  :-//.
I try a KingSpeed SSD PATA 32GB with no luck.
Also I try a hgst 40GBytes ATA from my old laptop with no luck.
I think It is possible to enter the disk geometry manually in Bios, but I do not have information about the parameters of the disks.

But It appears that the BIOS is very OLD and doesn't read new hard disk..
I will try with a Compact Flash Adapter...

I would install Windows 2000, but I need a DB9 mouse  |O. I open the mainboard FRM5+8B version to see that It has a only 128MB module from a two sockets, the Intel 430TX Triton chipset must have some USB ports, but where are theses ports????

I will upgrade the memory. However, the old MSDOS Software uses Pharlap DOS Extender and DPMI mode, using only 64Mbytes.. so not interesting to upgrade RAM unless The Old software works under Windows, that I think that is not possible...

So.. please..  some advice...
Thank You!!

Manuel

--- End quote ---

See my previous post on this subject: https://www.eevblog.com/forum/repair/rs-cmu200-software-(firmware)/msg779471/#msg779471

My HD was also 20GB with 2GB partition, and replaced it with a 40GB one...

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