Products > Test Equipment
Rohde & Schwarz CMU200
ZL1CVD:
Minimum spec analyzer is 10.000005 MHz. I updated to latest 5.21 firmware and there was no change to this.
For power you set frequency and bandwidth (1MHz to 10Hz) and it displays it on graph in RF Power screen.
richnormand:
--- Quote from: hoangviet on June 27, 2016, 10:10:48 am ---
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 :)
--- End quote ---
Thanks for the clarification hoangviet.
In my case the amber/yellow light for standby does work. When I press the button it goes green. However there is no power out of the power supply at all. All the lines, except the standby 12V, are dead. So I have to conclude that my problem is in the PSU and was different than yours. There are more detail in the "repair" section of the forum.
Best of luck fixing the second unit back-light inverter.
cio74:
--- Quote from: ZL1CVD on June 28, 2016, 01:14:15 am ---Minimum spec analyzer is 10.000005 MHz. I updated to latest 5.21 firmware and there was no change to this.
For power you set frequency and bandwidth (1MHz to 10Hz) and it displays it on graph in RF Power screen.
--- End quote ---
Thanks, how much have you paid for yours? There are a couple on Ebay but I find the figure a little too high considering it does not cover below 10MHz (something that I need as a ham radio enthusiast).
ZL1CVD:
I'm using mine for ham radio too. US$450 for CMU200 which has B95 (2nd RF gen). US$500 for CRTU-RU which was loaded B17 I/Q, 2x RF TX/RX, Etc. The CRTU-RU has no audio gen/analyzer. BTW the standard RF generator goes from 100KHz to 2.7GHz in these. The Spec analyzer is 10MHz to 2.7GHz.
I had an HP 8924 & Agilent E8285A. These R&S units are handy but do lack compared with these. Its mainly in the user interface and I think it is worth hacking around with that. In the mean time, there is 'some' usability there. If you want out of the box good old fashioned user interface that does analogue radio, get an 8924, E8285 or 8935. Unfortunately they are old and limited frequency wise but they do old fashioned radio really really well. The analogue duplex screen on these HP's is the 1st thing I want to try and emulate with the R&S's.
msraya:
Hello!
Frequency is not big deal.. Because you can use a coaxial mixer and have SA from 0 Mhz to 6 Ghz.. no problem...
The problem with the unit is that it needs calibration and that the sensibility and noise floor is not very good but sufficient...
This is not a clasic test set... but I think it is more for design and development than repair.. My Stabilock 4032 is more easy to work with and to make quick tests for repair...
I get mine for 900 euros with old mainboard, B17, B41 and B95. Not cheap but in good working condition.
Manuel
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