Products > Test Equipment

new killer scope in town - a true game changer from R&S - RTB2002 & RTB2004

<< < (650/672) > >>

2N3055:

--- Quote from: Lino22 on December 18, 2023, 09:48:56 am ---
--- Quote from: egonotto on December 15, 2023, 03:37:07 pm ---Hello,

with a divider probe you must use DC-coupling.

Since a coupling capacitor has an extremely high impedance at DC, practically the entire input voltage at the coupling capacitor drops at DC. This can be very unhealthy.

See the circuit in the picture Divider.png.

Best regards
egonotto

--- End quote ---

I am afraid that it is more like this. So the input impedance the signal right after the probe can see is largely set by the 100k resistor.

--- End quote ---

If we are  being pedantic upper resistor in divider would be circa 99,9 MΩ and lower circa 99,9kΩ...  ^-^

But I think egonotto was talking about first probe you mentioned not the P6015A ...

Lino22:

--- Quote ---But I think egonotto was talking about first probe you mentioned not the P6015A ...
--- End quote ---

Oh of course.

Robaroni:

--- Quote from: EEVblog on December 18, 2023, 10:28:29 am ---
--- Quote from: pdenisowski on December 10, 2023, 12:19:28 am ---
--- Quote from: Robaroni on December 09, 2023, 12:14:18 pm ---Unfortunately I can't find out because your tech dept. doesn't even have basic schematics that trouble shoot down to board level. It's always been that way? Maybe you shouldn't have told me that, I think end users should have the right to repair with schematics and access to parts, it's not a good omen that your tech dept. doesn't even have schematics.

--- End quote ---

Just curious:  have you tried getting schematics for current products from Rigol or other T&M instrument manufacturers?  I would be very interested in seeing them.

--- End quote ---

So would I. I don't know of any scope manufacturer who has released schematics in probably the last 25 years.
Siglent for example do service manuals, which is fantastic, but there are no schematics:
https://siglentna.com/download/6149/?tmstv=1702895353

--- End quote ---

Dave,
First, he told me he was looking right at the schematic and wouldn't even tell me if the encoder connected to a chip on the same board. You'll notice that the person who said "he was very much interested in this conversation" never got back to me. (I did see he was quick to give you a thumbs up though!)

Here's a link to the Agilent 33220A from 2012 with a full service manual and a schematic (the 33220A was discontinued in 2016 BTW):

https://www.keysight.com/us/en/assets/9018-04439/service-manuals/9018-04439.pdf

Here's a current production 34465A service manual:

https://www.keysight.com/hk/en/support/34465A/digital-multimeter-6-5-digit-truevolt-dmm.html

And a service manual for the Tek TPS2000B scopes.

https://download.tek.com/manual/077044700web.pdf

I haven't checked any other instruments but these were quick searches, do a search for an RTB 2004 service manual.

R&S doesn't even offer a service manual on a scope that has been out over 7 years. Ask them about buying parts, I've directly bought parts from Tex and Keysight (Agilent). They won't even sell you parts.

Their own tech dept. specifically told me they don't have access to schematics, search down, you'll see people still looking for a schematic around here. Their service dept. was only interested in one thing - send it in for repair.

R&S, I'm going to tell you again - here comes China. That's why you guys are burning the midnight candle in snow storms. I just bought a fully loaded 250M 12 bit scope for eight hundred bucks that's pretty darn good and well finished to boot.

I'll ask you again - are you sure you really want to have this conversation? I remember when Japan went after VW in the 70's and the VW dealer laughed at me, then I remember when Japan went after MB with the Lexus and Germany laughed.......



edavid:

--- Quote from: Robaroni on December 18, 2023, 02:09:30 pm ---First, he told me he was looking right at the schematic and wouldn't even tell me if the encoder connected to a chip on the same board.

--- End quote ---

No, he never said he had the schematics.  Here is his exact quote:


--- Quote ---I've been with R&S for over 15 years and it's always been that way:  even service manuals don't necessarily have detailed, component level schematics (the RTB2000 service manual does not - I have it in front of me).

--- End quote ---

He has the internal service manual, which has no schematics.

Robaroni:
Okay, thanks for the clarification, I stand corrected but that doesn't change the fact that their tech dept. doesn't have schematics AND probably never has AND they don't have service manuals AND they won't even tell me if the encoder drives a chip on the same board AND they won't even sell me a part if it does!

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod