 Mon Mar 7 16:37:54 2022, Stefan Ritt, Scaler issue to evaluate live time 
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I tried your measurement with the DRSOscilloscope app (see below), and I measure a constant difference of 10 Hz among the whole range of 100 Hz to 3
kHz.
So I don't know what's wrong on your side. Did you try with the oscilloscope app as well? Have you checked your pulse generator? The |
 Fri Sep 13 15:27:41 2019, Arseny Rybnikov, Scaler / How to modify the firmware to change the scaler integration time
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Hello,
We want to use the inner DRS4 counter(scaler) within more than the 100ms integration time. We guess that we need to modify the original
firmware around this point: |
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Thu Nov 26 18:59:27 2015, Robert Adams, Saving histogram data
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I would really love to be able to save histogram data, though I have not been able to do this. I could take a screenshot and extract the data from an
image, but would prefer to avoid this if there is a simpler way... possibly I have overlooked something obvious? Thanks very much for any advice or tips. |
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Tue Feb 16 11:21:43 2016, Stefan Ritt, Saving histogram data
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There is no histogram save functoinality in ther DRSOscilloscope program - on purpose. The board and the software are meant to evaluate the board, not
to replace a full DAQ system. If we want to save histograms, you maybe also want to set the range, make cuts, do fits etc. So it would take lots of resources
to add all that. Therefore we recommend to use the stand-alone C program drs_exam.cpp to read the board, the you can either do whatever you want in the |
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Tue Feb 16 11:55:54 2016, Martin Petriska, Saving histogram data
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Robert
Adams wrote:
I would really love to be able to save histogram data, though I have |
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Sat Feb 2 00:13:12 2019, Hans Steiger, Saving Rate (only 15Acq/s)
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Dear All,
when I use my Evaluation Board with some PMTs I can digitize 450 Acq/s or so. But when I want to save the waveforms the rate goes down. The Acqu. |
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Sat Feb 2 10:10:22 2019, Stefan Ritt, Saving Rate (only 15Acq/s)
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The reduction of rate is because you save in XML format, which is an ASCII format, so human readable, but takes long to write. If you switch to binary
format and write on a decent fast hard disk, you should get back to 450 Acq/s.
Stefan |
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Wed Jul 30 11:38:58 2014, Tsutomu Nagayoshi, Sampling speed of DRS4 Board ver4
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Hello!
I have a question concerning the sampling speed of the DRS4 evaluation board.
It is written in the manual that the sampling speed of DRS4 Evaluation Board is supported above 0.7 GHz. |
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Mon Sep 23 09:22:52 2013, Andrzej Rychter, Sampling Frequency: DRS4 eval board
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Is it possible to set sampling frequency at 100 MHz in DRS4 eval board? Trying to set 0.1GHz in Osci program results in around 0.7 GHz. In drscl.exe
i'm able to set freq at 0.1GHz but calibration is impossible.
Thank For Help! |
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Mon Sep 23 09:26:56 2013, Stefan Ritt, Sampling Frequency: DRS4 eval board
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Andrzej Rychter wrote:
Is it possible to set sampling frequency at 100 MHz in DRS4 eval board? Trying to set 0.1GHz in Osci |
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Mon Sep 23 09:51:48 2013, Andrzej Rychter, Sampling Frequency: DRS4 eval board
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Stefan Ritt wrote:
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Wed Mar 7 22:49:38 2018, Rodrigo Trindade de Menezes, Running drs_example.cpp
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Hello,
We have been using the DRS4 evaluation board (S/N 2636) that works with the scope application. However we are trying to run the DRS4 evaluation
board remotely by modifying the drs_exam.cpp to acquire and store data continuously. |
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Thu Mar 8 22:54:20 2018, Rodrigo Trindade de Menezes, Running drs_example.cpp
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We found a way to solve the previous problem, but right now when we try to set the input range only -0.5 to 0.5 is working. When we set the function
"SetInputRange(0.5)" for 0 to 1V the output is all zeros and with "SetInputRange(0.45)" we just get all the outputs -49.9mV.
What does that means? How to fix? |
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Mon Mar 19 15:12:02 2018, Stefan Ritt, Running drs_example.cpp
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The time channel is already calibrated in ns. So for 5 GSPS, the time scale goes from zero to 200. Concerning your other issues I will come back to you
later.
Stefan |
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Fri May 4 12:11:57 2018, Stefan Ritt, Running drs_example.cpp
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And here is the second part of your answer: When you change the input range, you have to redo the voltage calibration. Best is if you do that in the
DRSOsc program, then you see that it's working. Then start your custom program and use the same range.
Stefan |
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Wed Jun 26 15:17:51 2019, Si Xie, Running drs_example.cpp
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Hi Rodrigo, I'm wondering how you solved your original triggering problem. We are also having trouble with collecting data continously using the
example. Thanks.
Rodrigo |
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Mon Mar 16 16:07:39 2015, Hermann-Josef Mathes, Running 2 instances of a DRS DAQ program
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Hi,
we want to run two instances of our little DRS DAQ program but obviously the first instance started always claims all DRS boards for itself and
the other one exits with an error. The 2 boards used in the example below have the serial number # 2413 and #2414 and are v5 boards. |
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Tue Mar 17 02:53:26 2015, Stefan Ritt, Running 2 instances of a DRS DAQ program
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I never had in mind running two systems in parallel, that's why the code claims all interfaces when started. You have to dig into the usb code which
is located in musbstd.c at function musb_open(). There you will find a line libusb_claim_interface() which requests exclusive access to the usb subsystem.
The code is there because I copied it from some standard example for the libusb library. You have to read the documentation for libusb (http://libusb.sourceforge.net/api-1.0/) and |
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Thu Mar 19 07:37:52 2015, Daniel Stricker-Shaver, Running 2 instances of a DRS DAQ program
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I don't know if it helps, but we measured the time resolution between two independendly running v3 boards using a single PC (latest software) in
Linux. (http://arxiv.org/abs/1405.4975)
You start the DRS DAQ program with only one USB board connected, first. Afterwards connect the second board and start another session. If you |
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Mon Feb 23 09:24:24 2009, Stefan Ritt, Rise-time measurements
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Many applications using the DRS4 need to measure fast rising signals, like for PMTs or MCPs. This short note shows the minimal rise-times which can be
measured with different input signal conditioning.
Evaluation Board
The evaluation board contains four passive transformers ADT1-1WT from Mini-Circuits to convert the single-ended input |