 Wed May 13 01:07:36 2015, Cosmin Deaconu, DRS4 Evaluation Board + Powered USB Hub
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I am trying to use 4 evaluation boards with a powered USB hub (since eventually, I will have to do this on a laptop). It seems like destroying
the DRS object is insufficent to properly close the boards when on the hub (i.e. I get usb read errors next time I run my program). When all the boards
are plugged into the computer, all is fine. This is on Linux using libusb1. My guess is something about resetting the port doesn't work properly |
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Tue Jun 16 20:45:54 2015, Michael Buadelk, DRS4 Evaluation Board Osc Application
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Hi, I have a DRS4 v5 evaluation board and I have a novice question about the oscilliscop application. When I connect it to a photo-detector (silicon
photo-multiplier to be exact), the signal appears only on one half of the screen, and I cannot change it to be full screen, and pulse to be centered. I
tried changing delay time and played around with the settings of the applicaton but no success. I'd apprecite if someone help me on this, probably |
 Tue Jun 16 22:26:41 2015, Stefan Ritt, DRS4 Evaluation Board Osc Application
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There is a horizontal position slider in the "Horizontal" box on the right side below the trigger delay. Use it.
Michael
Buadelk wrote:
Hi, I have a DRS4 v5 evaluation board and I have a novice question |
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Thu May 21 07:18:48 2020, Keita Mizukoshi, DRS4 Evaluation board control tool 'drscl' with macro file
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Dear experts,
I would like to use DRS4 evaluation board as DAQ system for small, table-top experiment. |
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Fri May 22 12:53:33 2020, Stefan Ritt, DRS4 Evaluation board control tool 'drscl' with macro file
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There is an example program in the distribution under software/drscl/drs_exam.cpp which is a stand-alone program to do what you need. It uses the C library
coming with the distribution. It configureres the board, defines a trigger, and then writes a few waveforms into a file. You can use it as a starting point
for your development. If you need any other language, you have to develop bindings to the C library. |
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Mon May 25 03:36:12 2020, Keita Mizukoshi, DRS4 Evaluation board control tool 'drscl' with macro file
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Thank you very much. That is what I wanted.
Stefan
Ritt wrote:
There is an example program in the distribution under software/drscl/drs_exam.cpp |
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Mon Apr 23 10:38:51 2012, Guillaume Blanchard, DRS4 Initialization
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Hello,
I am writing a VHDL code to drive a DRS4 chip.
In order to configure the DRS4 chip, I have to set the "Config Register" and the "Write Shift Register" then ... (I do not |
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Wed Apr 25 13:42:37 2012, Stefan Ritt, DRS4 Initialization
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Guillaume Blanchard wrote:
Hello, |
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Wed Nov 30 17:48:39 2016, samridha kunwar, DRS4 Initiation
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I am having a general problem getting read back using the ROI mode. In the transparent mode everything looks good. These are the steps that I take:
1) configure register (b"11111111",addr = "1100")
2) configure write shift register (b"11111111", addr = "1101") |
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Wed Nov 30 19:05:24 2016, Stefan Ritt, DRS4 Initiation
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Uhh, there are 1000 things which might be wrong. A bit like "my car is not working, it makes strange noise". Without having a look under the
hood, there is just some wild guessing:
- Is your ROFS input at the right value? Your O-OFS? |
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Fri Dec 2 15:32:52 2016, samridha kunwar, DRS4 Initiation
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Thanks for replying Stefan.
I was more so just concerned with the steps in the firmware when I had asked. However, yes the ROFS (1.05V) and O-OFS (0.9 V was 1.3 V earlier
but, changed this becasue of ADC input requirements) are per spec, the VDD voltages are all there and input voltages are within the rails and finally the |
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Fri Dec 2 16:47:37 2016, Stefan Ritt, DRS4 Initiation
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No, I can't think of anything else. There is no intermediate addressing stage. The only thing which sometimes happens is that the QFN76 package is
not soldered correctly. If you don't have this under control, some pins might have a bad contact. You can check this by touching with a oscilloscope
probe not the PCB pads but really the pins from the side, which is a bit tricky. |
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Wed May 11 04:01:14 2016, Maksat, DRS4 Macro to save events
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Dear Stefan,
I am trying to setup DRS inside radiation enclosure and would like to write a simple script that will automatically save certain number of events.
Could you please point to me an example that can I use for Mac OS? I saw there is drs_exam.cpp in the directory but was not able to get work |
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Thu May 12 12:38:17 2016, Stefan Ritt, DRS4 Macro to save events
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Dear Maksat,
If your car does not run, and you call the car dealer and tell him "my car does not run", what will the car dealer ask you? Eh... ?
Right ! He will ask "what are the symptoms, what did you try, what did and what did not work". Here it's the same. "was not able to |
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Mon Oct 21 14:43:21 2013, Stephane Debieux, DRS4 analog outputs - interfacing DRS4 to AD9222 ADC
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Hi,
I wish to interface the DRS4 with the 8-channel ADC AD9222 (or AD9637).
I'm reading from the DRS4 datasheet that "the analog output of the DRS4 chip has been designed to match directly the input of the AD9222". |
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Wed Sep 7 16:45:17 2011, Guillaume Blanchard, DRS4 and AD9222
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Normal
0
21
false
false
false
MicrosoftInternetExplorer4
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Wed Sep 7 16:56:43 2011, Stefan Ritt, DRS4 and AD9222
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Guillaume Blanchard wrote:
Normal
0
21
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Wed Sep 7 17:28:25 2011, Hannes Friederich, DRS4 and AD9222
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Guillaume Blanchard wrote:
Normal
0
21
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Fri Sep 9 09:28:57 2011, Guillaume Blanchard, DRS4 and AD9222
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Thank you for your answers,
Another question : Have you ever tried to split the differential signal at the output of the DRS4 chip ? For
example to feed both an AD9222 and a diff. amplifier (followed by discriminators) ? |
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Fri Sep 9 09:31:33 2011, Stefan Ritt, DRS4 and AD9222
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Guillaume Blanchard wrote:
Thank you for your answers, |