Rohde & Schwartz CMU200-B41 cards on Ebay - Page 1
Forum section: electronics / testgear

author: geoffwood
author_rank: Newbie
timestamp: June 05, 2025, 11:50:07 pm
content: The ones from China - are they likely to be 'real' or are they counterfeit/fakes ?And if the latter, do they work as well as the real thing ?

author: thm_w
author_rank: Super Contributor
timestamp: June 05, 2025, 11:59:23 pm
content: Link?Most look real as they are old and dirty. Though it is a bit suspicious some are using the same photos copied from other listings.

author: pdenisowski
author_rank: Super Contributor
timestamp: June 09, 2025, 09:55:09 am
content: I can't speak to these particular cards, but I would be very surprised if someone were making counterfeits / fakes of CMU hardware -- we manufactured tens of thousands of CMUs

author: Radioman260
author_rank: Contributor
timestamp: June 10, 2025, 03:22:49 pm
content: If you're a member over on groups.io someone is selling one. I also bought one off a guy direct in China, he came recommended from a member on groups.io.https:..xgeqpt.com.ask for David. His price was in line with other used ones, good communication and it worked find in my CRTU.

author: bdunham7
author_rank: Super Contributor
timestamp: June 10, 2025, 05:59:36 pm
content: Quote from: pdenisowski on June 09, 2025, 09:55:09 amI had no idea the numbers were so high, although they are plentiful in the surplus aftermarket. Who were the customers beyond cell-phone manufacturers and operators?

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 10, 2025, 06:24:14 pm
content: Quote from: bdunham7 on June 10, 2025, 05:59:36 pmI think they were popular with ham radio types, and I think the CMU200 is supposed to be decent as a regular SA also.ETA: Rudi has a video on it:

author: pdenisowski
author_rank: Super Contributor
timestamp: June 11, 2025, 09:04:45 am
content: Quote from: bdunham7 on June 10, 2025, 05:59:36 pmAlmost all of the CMU200 customers were in the mobile wireless industry (as reflected in the brochure) and/or people who were integrating wireless connectivity into other products.https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/CMU200_bro_en.pdfI can't recall ever meeting a CMU200 customer who was not somehow involved with wireless communications testing.

author: pdenisowski
author_rank: Super Contributor
timestamp: June 11, 2025, 09:11:38 am
content: Quote from: KungFuJosh on June 10, 2025, 06:24:14 pmThey became popular with hams / hobbyists when they entered the used market - I'm pretty sure very few CMU's were sold to them at list priceAnd yes, the spec an functionality is pretty good. We have this on most of our communications testers (e.g. the successor CMW500). It's not quite as good as on our "dedicated" spec ans, but it's more than sufficient for most basic spec an tasks.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 11, 2025, 01:41:54 pm
content: Who buys anything at list price?? 😉😉

author: bdunham7
author_rank: Super Contributor
timestamp: June 13, 2025, 02:21:21 am
content: Quote from: KungFuJosh on June 11, 2025, 01:41:54 pmI don't think any hobby users would buy one even at 50% off. IDK the list price for these (dependent on options) but perhapspdenisowskicould give us a clue? I sort of have an idea but IDK if I'm right.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 13, 2025, 02:22:42 am
content: Quote from: bdunham7 on June 13, 2025, 02:21:21 amIIRC for R&S it's at least one limb and a kidney.

author: pdenisowski
author_rank: Super Contributor
timestamp: June 13, 2025, 09:55:56 am
content: Quote from: bdunham7 on June 13, 2025, 02:21:21 amAs you say, like most T&M instruments, it really depended on how the CMU200 was optioned (hardware and software) .... and there were a lot of optionsIf I remember correctly, typical configuration was in the low tens of thousands of dollars, but don'tquoteme on that

author: pdenisowski
author_rank: Super Contributor
timestamp: June 13, 2025, 10:09:59 am
content: Quote from: KungFuJosh on June 13, 2025, 02:22:42 am(laughs) One of the things I struggle with in German is that there is no direct (but idiomatic) translation of "costs an arm and a leg"In conversation I would normally say "schweineteur" or "sauteuer" (literally, pig-expensive). German likes to use "schweine-" (Engl. swine) or "sau-" (Engl. sow) as a colloquial prefix to indicate "very, extremely, etc." Still doesn't really capture the same meaning though.

author: LazyJack
author_rank: Frequent Contributor
timestamp: June 13, 2025, 10:23:48 am
content: It's really a pitty R&S left so many potential in the CMU with stopping the software development. I mean I guess from their viewpoint is is good, they sold a ton of them, before it went obsolete with mobile technology advaces. But from a hobbyist viewpoint having the firmware opensourced or at least the API or SDK published would open up endless possibilities.Of course it is all dreaming...We have to reverse engineer and at least make the 'for future development' speaker provide audio :-)

author: FPSychotic
author_rank: Regular Contributor
timestamp: July 25, 2025, 07:33:27 am
content: Hi , is anyone selling crtu-ru handles or B6 option?