Products > Test Equipment
Rohde & Schwarz Oscilloscopes - Questions/Comments? Let me know!
LaurentR:
--- Quote from: Rich@RohdeScopesUSA on March 13, 2017, 02:38:03 am ---Hi Folks,
--- End quote ---
Hi Rich,
I am a brand new owner of a RTB2004. It is an awesome scope and I am really enjoying it.
However, I find it to be not nearly as quiet as I thought it would be. There is some serious attention to details on the airflow and the rubber mounting on the fan, but I found that, except briefly during the first seconds of boot, the fan is running at full speed (10.7V) all the time. Other users report having a nearly silent unit, so I am wondering if there is something wrong. Over on the RTB2004 thread, at least one other user has the same issue. This is at 21C ambient and no airflow restriction.
1. Is the fan supposed to be thermally controlled or is it supposed to run at full speed all the time?
2. If it is supposed to run at full speed, I may have gotten a noisy fan.
3. If it is thermally controlled, is there a diagnostic for whatever temp sensor is used to decide the fan speed?
As an aside, is the 01.204 firmware available somewhere? I downgraded to 01.203 to see if it fixed the fan issue, but I am now getting an error during boot.
Laurent
Rich@RohdeScopesUSA:
--- Quote from: fonograph on May 11, 2017, 01:12:48 pm ---this is not oscilloscope question but I will try anyway.The HMF2550 arbitrary function generator,if I have PWM carrier,and I want to module it with sinewave,what is the highest freqency that modulating sinewave can be? Also what is the maximum PWM carrier freqency?
--- End quote ---
Hi fonograph - unfortunately, I'm not sure. And I have to admit, I've been swamped lately and haven't had much time to follow up on non-scope questions. If you need an answer quickly, I'd highly suggest calling the support line for your region. Go to https://www.rohde-schwarz.com/, make sure to select your country and then go under the service and support section. There will be contact info there for you and they should be able to get you the answer faster than I can.
-Rich
Rich@RohdeScopesUSA:
--- Quote from: LaurentR on May 12, 2017, 06:28:32 pm ---
--- Quote from: Rich@RohdeScopesUSA on March 13, 2017, 02:38:03 am ---Hi Folks,
--- End quote ---
Hi Rich,
I am a brand new owner of a RTB2004. It is an awesome scope and I am really enjoying it.
However, I find it to be not nearly as quiet as I thought it would be. There is some serious attention to details on the airflow and the rubber mounting on the fan, but I found that, except briefly during the first seconds of boot, the fan is running at full speed (10.7V) all the time. Other users report having a nearly silent unit, so I am wondering if there is something wrong. Over on the RTB2004 thread, at least one other user has the same issue. This is at 21C ambient and no airflow restriction.
1. Is the fan supposed to be thermally controlled or is it supposed to run at full speed all the time?
2. If it is supposed to run at full speed, I may have gotten a noisy fan.
3. If it is thermally controlled, is there a diagnostic for whatever temp sensor is used to decide the fan speed?
As an aside, is the 01.204 firmware available somewhere? I downgraded to 01.203 to see if it fixed the fan issue, but I am now getting an error during boot.
Laurent
--- End quote ---
Hi LaurantR - first, thanks for getting a R&S scope and I'm glad you like it. Second, I am checking on how the thermal management works. I believe it will vary based on temp, but I want to make sure. Having said that, your scope should be very quiet. It sounds like something is abnormal. One thing I'd like you to try to see if it solves the fan issue - a hard reset. To do that:
-Switch off unit
-Switch on unit
-When the units shows the remark about pressing AUTOSET to reset the language: press and hold PRESET until the unit boots to the update FW screen
-Exit that menu
With respect to 1.204 - that was a tweak for manufacturing and didn't change anything functionally between 1.203 and it. Which is why it hasn't been posted on the web. I'll see if I can get you a version of it in the meantime, otherwise when the new firmware comes out this month that should solve the issue you are seeing.
-Rich
LaurentR:
--- Quote from: Rich@RohdeScopesUSA on May 13, 2017, 01:39:58 am ---Hi LaurantR - first, thanks for getting a R&S scope and I'm glad you like it. Second, I am checking on how the thermal management works. I believe it will vary based on temp, but I want to make sure. Having said that, your scope should be very quiet. It sounds like something is abnormal. One thing I'd like you to try to see if it solves the fan issue - a hard reset. To do that:
-Switch off unit
-Switch on unit
-When the units shows the remark about pressing AUTOSET to reset the language: press and hold PRESET until the unit boots to the update FW screen
-Exit that menu
With respect to 1.204 - that was a tweak for manufacturing and didn't change anything functionally between 1.203 and it. Which is why it hasn't been posted on the web. I'll see if I can get you a version of it in the meantime, otherwise when the new firmware comes out this month that should solve the issue you are seeing.
-Rich
--- End quote ---
The reset procedure did what it was supposed to do, but that didn't change anything to the fan noise/speed issue.
Please let me know if the fan is indeed supposed to be thermally controlled and if there is any diagnostic steps I can take (or seek direct support with R&S or the reseller).
Hydron:
Hi Rich,
I have the exact same problem with the fan noise, and the reset procedure didn't fix mine either. In the RTB2k thread it seems that some have very little noise (difficult to tell that unit is on) while others have a lot (annoyingly loud), and I'm unfortunately in the latter camp. I'll wait and see what the response is - hopefully it's easily resolvable and I don't need to get my unit replaced (fan cycles through speeds on bootup, including the almost-inaudible one, then goes full blast during operation, so it's pretty clearly being set to the wrong speed, but that speed control does work).
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version