 Wed Feb 15 18:08:13 2012, Yuji Iwai, Evaluation Board v4 Trigger/Clock Connectors
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| Quick question - what type of connectors are used for the trigger and clock in/out on the v4 eval board? |
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Sat Feb 4 11:59:26 2012, Zhongwei Du, what sort of detectors for physical experiment the DRS4 used?
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Hello.
We are designing a waveform sampling board for Si strip array detector ,whose rise time is less than 10 ns, which makes we doubt whether the
DRS4 can do more accurate than traditional charge integral circuit for charge measuring. |
 Mon Feb 6 08:15:38 2012, Stefan Ritt, what sort of detectors for physical experiment the DRS4 used?
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Zhongwei Du wrote:
Hello. |
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Tue Jan 31 08:10:37 2012, Stefan Ritt, IEEE Real Time 2012 Call for Abstracts
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Hello,
I'm co-organizing the upcoming Real Time Conference, which covers also fields of waveform processing and sampling, so it might be interesting for
people working with the DRS4 chip. If you have recent results, you could also consider to send an abstract to this conference. It will be nicely |
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Thu Jan 26 09:12:03 2012, Ravindra Raghunath Shinde, DRS4 Rev2.0 for analog pulse counting
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Hello,
We are using DRS4 Rev.2.0 board.
We want to measure number of pulses generated by charge particle detector. These negative going analog pulses are very fast having rise time |
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Thu Jan 26 09:15:42 2012, Stefan Ritt, DRS4 Rev2.0 for analog pulse counting
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Ravindra Raghunath Shinde wrote:
Hello, |
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Thu Jan 26 09:44:34 2012, Ravindra Raghunath Shinde, DRS4 Rev2.0 for analog pulse counting
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Stefan Ritt wrote:
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Thu Jan 26 09:49:38 2012, Stefan Ritt, DRS4 Rev2.0 for analog pulse counting
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Ravindra Raghunath Shinde wrote:
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Thu Jan 26 10:05:57 2012, Ravindra Raghunath Shinde, DRS4 Rev2.0 for analog pulse counting
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Stefan Ritt wrote:
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Thu Jan 19 23:26:26 2012, Heejong Kim, drs_exam.cpp for evaluation board version 4
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Hello,
I'm using DRS4 evaluation board version4 in Linux (Scientific Linux 5).
Version4 software (drs-4.0.0) was installed without any troubles. |
Fri Jan 20 08:09:38 2012, Stefan Ritt, drs_exam.cpp for evaluation board version 4 
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Heejong Kim wrote:
Hello, |
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Fri Jan 20 23:50:39 2012, Heejong Kim, drs_exam.cpp for evaluation board version 4
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Stefan Ritt wrote:
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Wed Dec 14 00:44:37 2011, Hao Huan, Synchronization Delay in the Firmware for 8051 Controller
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Hi Stefan,
I have a question regarding the DRS 4 evaluation board firmware for the 8051 controller embedded in the CY7C68013 USB chip:
on the board the controller is running at 12 MHz and the FIFO interface of the USB chip is running at 30 MHz, so the number of delay cycles for synchronization |
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Wed Dec 14 08:55:29 2011, Stefan Ritt, Synchronization Delay in the Firmware for 8051 Controller
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Hao Huan wrote:
Hi Stefan, |
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Mon Dec 12 16:43:04 2011, Stefan Ritt, DC coupled DRS4 input stage
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In the attachement you will find a working DC-coupled input stage to the DRS4 chip. The bandwidth of this design is about 700 MHz, the gain is 1.
The upper version does not have an additional input buffer. This is not a very "clean" design, since the differential driver has an input
impedance of 150 Ohm, which together with the 75 Ohm termination resistor gives about 50 Ohm termination. |
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Thu Apr 14 18:23:53 2011, Bob Hirosky, Fixes to DOScreen.cpp for recent built on linux
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Hello,
I was just building version 3.1.0 and ran into some problems in DOScreen.cpp. Basically the conversions from
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Fri Apr 15 08:28:54 2011, Stefan Ritt, Fixes to DOScreen.cpp for recent built on linux
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> Hello,
>
> I was just building version 3.1.0 and ran into some problems in DOScreen.cpp. Basically the conversions from
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Fri Dec 9 17:45:48 2011, Michael Büker, Fixes to DOScreen.cpp for recent built on linux
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> I was just building version 3.1.0 and ran into some problems in DOScreen.cpp. Basically the conversions from
> char* to wxString were generating "ambiguous overload" errors (in gcc 4.4.3, wx-2.8)
>
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Mon Oct 31 09:15:02 2011, Zhongwei Du, How to link PMT
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I want to measure the signal from PMT . But it is a current signal, should i just put a series resistance, or use a amplifier to convert it to voltage
signal before drs4?
Can you give me some advice ? |
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Tue Nov 1 11:07:02 2011, Stefan Ritt, How to link PMT
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Zhongwei Du wrote:
I want to measure the signal from PMT . But it is a current signal, should i just put a series resistance, |
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Sun Oct 23 23:32:28 2011, Hao Huan, Phase Shift for ADC Readout
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Dear Dr. Ritt,
In the DRS 4 datasheet it is recommended to sample the analog output of the chip after 8~10 ns of the SRCLK edge for it to stablize
and thus a phase shift between SRCLK and the ADC sampling clock is necessary. However in the latest version of the evaluation board firmware the phase-shifted |
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Mon Oct 24 10:30:15 2011, Stefan Ritt, Phase Shift for ADC Readout
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Hao Huan wrote:
Dear Dr. Ritt, |
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Sat Oct 15 04:45:25 2011, Aurelien Bouvier, DRS4 eval board: readout rate
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Hi,
Our setup uses a DRS4 evaluation board (version 2.0).
Although we trigger the board at a rate of ~4kHz (on channel2), readout through USB2 is only happening at a rate of ~125Hz. |
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Sat Oct 22 00:40:02 2011, Stefan Ritt, DRS4 eval board: readout rate
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Aurelien Bouvier wrote:
Hi, |
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Fri Sep 16 22:06:07 2011, Andriy Zatserklyaniy, compilation error for version 4.0.0 on linux
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Hi Stefan,
When I compiled DRS4 software version 4.0.0 on Linux (Debian Squeeze) I got this compilation error:
g++ -g -O2 -Wall -Wuninitialized -fno-strict-aliasing -Iinclude -DOS_LINUX -DHAVE_LIBUSB -DUSE_DRS_MUTEX musbstd.o mxml.o strlcpy.o DRS.o ConfigDialog.o |
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Mon Sep 19 08:53:22 2011, Stefan Ritt, compilation error for version 4.0.0 on linux
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Andriy Zatserklyaniy wrote:
To fix it I added TriggerDialog.o into CPP_OBJ line of the Makefile: |
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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, |
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Mon Jul 19 12:07:04 2010, Jinhong Wang, Fixed Patter Timing Jitter
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| Hi Stefan, can you give some suggestions on determination of fixed pattern timing jitter of DRS4? Thanks~ |
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Mon Jul 19 12:47:17 2010, Stefan Ritt, Fixed Patter Timing Jitter
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Jinhong Wang wrote:
Hi Stefan, can you give some suggestions on determination of fixed pattern timing jitter of DRS4? |
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Mon Jul 4 05:06:00 2011, Jinhong Wang, Fixed Patter Timing Jitter
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Stefan Ritt wrote:
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Tue Jul 5 10:09:43 2011, Stefan Ritt, Fixed Patter Timing Jitter
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Jinhong Wang wrote:
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Tue Jul 12 09:49:08 2011, Jinhong Wang, Fixed Patter Timing Jitter
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Stefan Ritt wrote:
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Wed Jul 13 04:26:52 2011, Stefan Ritt, Fixed Patter Timing Jitter
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Jinhong Wang wrote:
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Wed Jun 1 09:57:43 2011, Martin Petriska, Removing spikes
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I have DSR4 eval board. Found that there are spikes in channels. Procedure Osc::RemoveSpikes to remove them looks litlle dificult. There is simple way,
if you doesnt need to measure all 4 channels.Spikes are in all channels, and it looks like they are same in time and value between channels. To remove
them, if you are not using one channel, substract that unused channel with spikes from used channel and your data will be without spikes. If you need all |
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Thu Jun 2 21:01:29 2011, Stefan Ritt, Removing spikes
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Martin Petriska wrote:
I have DSR4 eval board. Found that there are spikes in channels. Procedure Osc::RemoveSpikes to remove |
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Fri Feb 25 10:13:51 2011, Stefan Ritt, Announcement digital pulse processing workshop
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Dear colleague,
if you live not so far from Zurich, you might be interested in this workshop:
http://www.xtronix.ch/hep/psi_workshop.htm |
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Sat Feb 19 17:25:29 2011, S S Upadhya, how to synchronize Sampling frequency of two evaluation boards
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Dear sir,
We have two evaluation boards of DRS4. We would like to use 8 inputs to be recorded on a trigger and we would like to find the relative time difference
of inputs. So is it possible to synchronize the sampling frequency of the two evaluation boards. |
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Sat Feb 19 22:46:35 2011, Stefan Ritt, how to synchronize Sampling frequency of two evaluation boards
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S S Upadhya wrote:
Dear sir, |
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Mon Feb 21 08:10:31 2011, Stefan Ritt, how to synchronize Sampling frequency of two evaluation boards
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Stefan Ritt wrote:
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Mon Feb 21 12:42:33 2011, S S Upadhya, how to synchronize Sampling frequency of two evaluation boards
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Stefan Ritt wrote:
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Tue May 18 09:24:02 2010, Stefan Ritt, Reference design for DRS4 active input buffer
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The design of high frequency differential input stages with the DRS4 is a challenge, since the chip draws quite some current at the input (up to 1 mA
at 5 GSPS), which must be sourced by the input buffer. A simple transformer as used in the DRS4 Evaluation Board 2.0 limits the bandwidth to 220 MHz. In
meantime two active input stages have been worked out and successfully been tested, both utilizing the THS4508 differential amplifier. The first design |
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Tue Oct 12 03:53:37 2010, Jinhong Wang, Reference design for DRS4 active input buffer
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Stefan Ritt wrote:
The design of high frequency differential input stages with the DRS4 is a challenge, since the chip |
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Tue Nov 16 16:38:06 2010, Stefan Ritt, Reference design for DRS4 active input buffer
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Jinhong Wang wrote:
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Wed Jul 21 10:46:32 2010, Jinhong Wang, ENOB of DRS
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Hi, Stefan, I see in your ppt "Design and performance of 6 GSPS waveform digitizing chip DRS4" , you define DRS4 ENOB as 1Vpp/0.35mv(RMS)
= 11.5bit, where, 1Vpp is the linearity input range, and 0.35mv is the rms voltage after offset correction. What I understand is that 0.35mV is obtained
from DC offset Correction, hence 11.5 bit is for DC input, am i right? If true, what about ENOB for AC input in the whole analog bandwidth? thanks~ |
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Wed Jul 21 10:58:20 2010, Stefan Ritt, ENOB of DRS
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Jinhong Wang wrote:
Hi, Stefan, I see in your ppt "Design and performance of 6 GSPS waveform digitizing chip |
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Mon Jul 12 16:07:37 2010, Stefan Ritt, Announcement evaluation board V3
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Dear DRS4 users,
a new version of the evaluation board has been designed and is in production now. The main difference is that it uses active input amplifiers,
which result in an analog bandwidth of 700 MHz (as compared with the 220 MHz of the previous board) at moderate power consumption, so the board can still |