Rohde & Schwarz HMO1202 - Come-a-Gutsa - Page 1
Forum section: electronics / testgear

author: trophosphere
author_rank: Frequent Contributor
timestamp: November 20, 2021, 04:45:20 am
content: As a temporary/semi-permanent one off measure, one could use aluminum foil to see if noise improves. Just make sure it makes a good connection to ground.

author: tautech
author_rank: Super Contributor
timestamp: November 20, 2021, 06:48:24 am
content: Someone needs all their screwdrivers confiscated.

author: Muttley Snickers
author_rank: Unknown
timestamp: November 20, 2021, 08:12:09 am
content: The first rule offorgot the shield clubis.......

author: tautech
author_rank: Super Contributor
timestamp: November 20, 2021, 08:27:28 am
content: Quote from: Muttley Snickers on November 20, 2021, 08:12:09 amActually, Muttley needs a new DSO....how much would you offer Muttley ?C'mon now be kind and make it at least $50.Got a spare alloy pie dish to knock up a shield with ?

author: DEV001
author_rank: Contributor
timestamp: November 20, 2021, 11:39:28 am
content: Digikey has a decent selection of various shields that you may be able to adapt for use in your scope for only a couple of dollars.https://www.digikey.com/en/products/filter/rf-shields/867

author: Old Fart Analog Engineer
author_rank: Contributor
timestamp: November 20, 2021, 04:51:28 pm
content: Of course the obvious answer is to order one from R&S! ROFL 🤣🤣🤣.These are made of cold rolled, tinplated steel. Practical idea: Get one from one of your "dumpster dives" and reform it with pliers and tin snips. The exact dimensions don't matter, just so it does not short out anything. Since you want to be a perfectionist, yes there are companies that would make you one, but at high costs, the main one being an expectation of a production quantity order follow-on.

author: 2N3055
author_rank: Super Contributor
timestamp: November 20, 2021, 07:35:41 pm
content: Noise is 50 Hz.Other can has additional magnetic shield layer stuck on it...Something that looks like sintered ferrite sheet...

author: Doctorandus_P
author_rank: Super Contributor
timestamp: November 21, 2021, 03:26:05 pm
content: Why is the USB connector upside down?Rigol also does that. It took me the better part of an hour to turn that connector around in my DS1052E.

author: AJ3G
author_rank: Regular Contributor
timestamp: November 22, 2021, 02:17:43 am
content: Dave:I just placed an order through my company from this outfit:https://www.orbel.com/emi-rfi-shielding/board-level-shieldingWe used them to fabricate some custom shields for bandpass filter assembly, to include cutouts for tuning the VARICAPS. I think in orders of 50 we are getting these shields for about $3.00/per. They did all the prototyping for us, but you may find a suitable stock item in their inventory.Rich

author: EEVblog
author_rank: Unknown
timestamp: November 22, 2021, 03:29:29 am
content: Fixed:

author: David Hess
author_rank: Super Contributor
timestamp: November 22, 2021, 06:15:13 am
content: It would take less than 10 minutes to notch and bend a piece of brass sheet from a hobby shop. They might also have tin plated steel sheet.

author: Fungus
author_rank: Super Contributor
timestamp: November 22, 2021, 09:16:02 am
content: Quote from: David Hess on November 22, 2021, 06:15:13 amIt takes much more than ten minutes to go to the hobby shop and buy it though...

author: David Hess
author_rank: Super Contributor
timestamp: November 22, 2021, 04:09:01 pm
content: Quote from: Fungus on November 22, 2021, 09:16:02 amPicky, picky ... If I did not have brass sheet, then I have a holiday cookie tin here that I could cut up. I would use the cookie tin just to have Frosty, Santa, and Rudolf inside my oscilloscope guarding measurements from noise.

author: Fungus
author_rank: Super Contributor
timestamp: November 22, 2021, 04:15:04 pm
content: Quote from: David Hess on November 22, 2021, 04:09:01 pmWe're only in November and you already ate all the Xmas cookies?Lock Picking Lawyer would use a Red Bull can but I know Dave doesn't drink anything like that.Luckily Dave has a magic dumpster that can produce absolutely anything on demand.Those little R&S 'scopes look awesome. It's a pity they never made them at a reasonable price.

author: David Hess
author_rank: Super Contributor
timestamp: November 23, 2021, 05:27:39 am
content: Quote from: Fungus on November 22, 2021, 04:15:04 pmIt is a cookie tin from Christmas past. I do not know what is in it ... eww, fossilized cookies of Christmas past.QuoteR&S make the DSOs I would be most interested in if I bought a new one, but I would want to do an evaluation. Some of their DSOs can operate with multiple acquisition modes simultaneously during decimation.