Products > Test Equipment
Rohde & Schwarz CMU200
Robert763:
--- Quote from: dcarr on March 08, 2020, 01:10:48 am ---I have a working CMU200 -> MMC (SD) card setup. See the pictures below for the PCMCIA adapter and the MMC card I use. I suspect that the it's important to use a SD (or MMC) card below a certain size...
--- End quote ---
I suspect that your setup works because that is not a simple SD card adaptor. It is an older multiformat SD, Sony Stick, Xd etc adaptor. This meains it has a conroller and probably presents the PC interface as ATA parallel.
Robert G8RPI.
Robert763:
--- Quote from: Octane on June 11, 2020, 03:15:21 pm ---Hi,
Does anyone know the differences between a CMU200 and a CMU300 by heart? Looking through the specs and manuals they seem identical.
Thanks,
Michael
--- End quote ---
The CMU-300 was configured / marketed for base station testing. The only significant difference is that only the 300 supports the B71 ABIS interface option. This provides a E1/T1 line interface that is used for wired communication with cellular base stations. No use what so ever to the average RF user. So unless you are testing base stations the 300 can be considered identical to the 200 with same options fitted.
Robert G8RPI.
szszjdb:
Anyone could help ?
The RF generator of my cmu200 dead. Running the RXTX1 selftest, all passed. But fail all in the internal RF loop selftest with no signal detected at all. Checked with another SA, the SG output a small signal nearly -60dbm than it is set. The RX path seems ok checked with anther SG.
Checked the service manual online , found no schematics of the RXTX board. Does anyone got the full version of service manual?
As the 3 tx LO were pass the selftest, the issue should be on some RF switch?
Best Regards,
szszjdb:
Hello everybody,
Does anyone know the component in the RXTX PCB, as attached picture? The yellow one with 4 signal port. I am tracing the signal flow and confused with this part.
Best Regards,
ZL1CVD:
looks like a SMD filter
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