 Fri Mar 2 20:17:17 2018, Stefan Ritt, ROI
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N'/N is correct. The 2 us "from the response you got from me" come from the fact that after readout, you have to start the DRS4 again.
During this time, the power supply usually becomes slightly unstable, and it takes on the evaluation board about 2us to stabilize it again. Tha't why
I add the 2 us. If you don't care about slight offset effect, or if you make a better power supply, you dead time would be 10*30ns = 300ns for 10 samples. |
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Fri Mar 2 21:05:48 2018, Steven Block, ROI
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Great! That is very helpful.
One more question. If no signals were detected in the 1024*200ps time frame in ROI mode, would the DRS4 go dead for 32us (or 30us depending on
the supply) for, or would it dump the earliest events in the buffer for the more recent ones until it detects a signal to readout? Or rather, does |
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Mon Mar 19 16:22:42 2018, Stefan Ritt, ROI
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The DRS4 has an internal storage of 1024 capacitors. They work as a ring buffer, so at 5GSPS you can store 200ns wide signals. After 200ns, the first
samples are overwritten by new samples, so you always have the last 200ns of samples stored. Once you trigger the DRS4, this buffer is frozen, and the
readout of this buffer causes the dead time. No trigger, no dead time. Hope this answers your question. |
 Tue Mar 30 22:57:34 2010, Hao Huan, ROFS Configuration
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Hi Stefan,
according to the DRS4 datasheet, if we want an input range centered around U0, the ROFS should be 1.55V-U0. However when I read
the codes of the evaluation board application, ROFS seems to be 1.6V-1.25*U0 where the coefficient 1.25 is said to come from sampling cell charge injection |
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Thu Apr 15 13:48:40 2010, Stefan Ritt, ROFS Configuration
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Hao Huan wrote:
Hi Stefan, |
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Tue Dec 4 09:24:22 2012, Zhongwei Du, Question of drs4 using
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When Denable and Dwrite is high , the voltage of PLLOUT is 0 V. And the Dtap is turn high with no delay when the Denable turns high.
After power up and configuration(the WSR,WCR,CR are all set to 11111111), the readout data is no change whenever the input analog signal and rofs,bias,oofs
changes. I have test useing the DAC to supply the Dspeed voltage, and change a new DRS4 chip, but all is the same. The readout data is strange : the first |
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Tue Dec 4 09:39:44 2012, Stefan Ritt, Question of drs4 using
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Zhongwei Du wrote:
When Denable and Dwrite is high , the voltage of PLLOUT is 0 V. And the Dtap is turn high |
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Tue Dec 4 09:50:11 2012, Zhongwei Du, Question of drs4 using
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Stefan Ritt wrote:
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Tue Dec 4 09:55:43 2012, Stefan Ritt, Question of drs4 using
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Zhongwei Du wrote:
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Wed Nov 21 08:34:52 2012, Gyuhee Kim, Question for using Multi board
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Hi.
I have 2 DRS4 evaluation V4 boards, and I want to use these 2 board to multi board DAQ system for 4 ch vs 4 ch DAQ. |
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Wed Nov 21 08:38:26 2012, Stefan Ritt, Question for using Multi board
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Gyuhee Kim wrote:
Hi. |
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Wed Nov 21 08:48:00 2012, Gyuhee Kim, Question for using Multi board
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Stefan Ritt wrote:
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Sat Apr 2 11:21:10 2016, Felix Bachmair, Question about timimng calibration
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Hi,
I am trying to understand some details about the timing calibration.
We wrote our own code but we more or less use the ideas of the Oscilloscope class. |
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Sat Apr 2 11:41:07 2016, Stefan Ritt, Question about timimng calibration
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The evaluation board normally has 1024 bins per channel. We offer an option with 2048 bins using channel cascading, to capture longer waveform windows.
The binary data format is however defined as having 1024 bins. Therefore, for the 2048 bin boards, the software averages over two adjacent cells and saves
effectively 1024 bins. The noise of each bin improves this way by sqrt(2). The time however is not very well defined, since you average the voltage of |
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Wed Aug 19 15:07:53 2015, Martin Petriska, QtPALS
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There is software for DRS4 board and positron lifetime measurement availiable. Still in beta but works. Its usable for measuring time between
pulses in two or three channels and histogramming that time. (May be time of flight measurement should be tested too) Project code is here: http://sourceforge.net/projects/qtpals/.
More about it is here http://iopscience.iop.org/1742-6596/505/1/012044/. |
Wed May 11 15:48:57 2016, SANDJONG Saturnin Orly, Probléme de Calibration de la DRS4 
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Bonjour, Je suis en stage dans un laboratoire ou on utilise pour echantillonnage des données, une cartes DRS4 5GSPS avec 1024 cell, mon probléme
réside dans la partie Calibration en tension selon l'article "Novel Calibration Method for Switched Capacitor Arrays Enables Time
Measurements with Sub-Picosecond Resolution". |
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Mon Mar 7 13:38:03 2022, Radoslaw Marcinkowski, Problems with DRS4 Evaluation Board after Windows 10 upgrade - share of experiences
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Dear DRS4 Users,
I would like to share my expireinces with using of DRS4 Evaluation Board software (oscilloscope) after upgrade of Windows 10.
I had Windows 10 (Enterprise) in version from ~2016. It was working fine with DRS4 Scope software. Due to the company policy, Windows was upgraded |
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Wed Oct 26 21:15:35 2016, Alexey Lubinets, Problems with DRS command line
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Hello, everybody
I have installed the software for the DRS4 Evaluation Board.
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Thu Oct 27 08:29:26 2016, Stefan Ritt, Problems with DRS command line
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[quote="Alexey Lubinets"]Hello, everybody
I have installed the software for the DRS4 Evaluation Board.
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Fri Oct 28 15:02:18 2016, Simon Mendisch, Problems with DRS command line
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[quote="Stefan Ritt"]
You are the first one describing this problem (out of ~200 people), so I guess the problem must be on your side. Have you made sure to start the DRS oscilloscope
and the Command Line Interface not at the same time? Only one program can access the board at a given time. Have you tried disconnecting and re-connecting |