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New entries since:Thu Jan 1 01:00:00 1970
ID Date Authorup Subject Text Attachments
  757   Wed Jun 26 13:08:42 2019 Stefan Rittdrs_exam is always reading out a sin waveSure, that’s correct. The example
program turns on the internal sine wave generator
in case people don’t have a real signal.
  
  760   Mon Jul 8 14:29:12 2019 Stefan Rittdrs_exam is always reading out a sin waveActually in the original drs_exam.cpp the
sine wave oscillator is turned off with this
command
  
  762   Mon Jul 15 17:26:50 2019 Stefan RittEvaluation Board Test FunctionalityHave you set the trigger correctly to the
channel with your signal, polarity and level?
Do you undersand the difference between normal
  
  765   Thu Jul 18 11:37:56 2019 Stefan RittTrace ImpedanceThe requiremnet is the same as for any
high speed analog board, there is othing
special with the DRS4. If you want to terminate
  
  767   Sat Jul 20 12:28:14 2019 Stefan RittTrace ImpedanceThe DRS4 input is high impedance. So if
you like you can terminate it with 100 Ohm
differentially and route it with 100 Ohm.
  
  769   Tue Aug 20 10:44:45 2019 Stefan Rittshould one deassert DENABLE while writing the write-shift register?Hi Bill,

you keep DENABLE active all the
time to keep the Domino Wave running, but
  
  772   Tue Aug 27 09:14:03 2019 Stefan RittDRS4Is a 5 GSPS oscilloscope suitable for use
with Silicon surface barier detectors?

  
  775   Mon Oct 14 10:14:46 2019 Stefan Ritthow to acquire the stop position with channel cascadingYou first set A3-A0, on the next clock
cycle you issue pulses on srclk, and about
10ns after each clock pulse the output shows
  
  777   Mon Oct 14 12:56:13 2019 Stefan Ritthow to acquire the stop position with channel cascadingNote that you have to read out the Write
Shift Register only if you do channel cascading,
e.g. configuring the chip with 4x2048 bins
  
  779   Mon Oct 14 15:27:09 2019 Stefan Ritthow to acquire the stop position with channel cascadingIf you configure the Write Shift Register
with 01010101b, then all you have to do after
a trigger is to set A3-A0 to 1101. The WSROUT
  
  782   Fri Oct 25 16:39:07 2019 Stefan RittComputing corrected time from binary data...what is t_0,0?t0,0 refers to the time of cell #0 of channel
#0. So basically you keep channel 0 fixed,
calculate the difference of each channel's
  
  786   Fri May 22 12:53:33 2020 Stefan RittDRS4 Evaluation board control tool 'drscl' with macro fileThere is an example program in the distribution
under software/drscl/drs_exam.cpp which is
a stand-alone program to do what you need.
  
  788   Fri May 22 13:24:51 2020 Stefan RittType check at DOFrame.h in official softwareThe software is a bit outdated, I will
soon make a new release. 

In meantime, you can replace that
  
  791   Tue May 26 12:44:16 2020 Stefan RittDomino waveLook at the attached picture. For simplicity,
only 4 cells are open and tracking the input
signal. Time is flowing from top to bottom.
 Screenshot_2020-05-26_at_12.43.40_.png 
  794   Mon Aug 31 10:52:42 2020 Stefan RittDynamic Range Evaluation Board and SoftwareYou cannot go below -0.5V for the inputs,
since the board does not have an internal
negative power supply, which would be necessary
  
  796   Mon Aug 31 17:17:30 2020 Stefan RittChannel CascadingIf you have a board with cascading option,
it should show the "combined" option
in the 2048-bin option enabled (not grayed),
 Screenshot_2020-08-31_at_16.52.28_.png 
  798   Wed Oct 7 10:56:03 2020 Stefan RittExternal triggeringThe trigger is there only to trigger the
chip, but cannot be used as a precise time
reference. If you want to measure precise
  
  801   Tue Oct 27 13:37:23 2020 Stefan RittTiming diagram of SROUT/SRIN signal to write/read a write shift registerDear Seiya,

1) That's correct. SRIN is
ampled at the falling edge. Pleae make sure
 Screenshot_2020-10-27_at_13.45.39_.png 
  803   Tue Oct 27 15:24:38 2020 Stefan RittTiming diagram of SROUT/SRIN signal to write/read a write shift registerThis is a static shift register, so you
can make the clock as slow as you want. Actually
I don't use a "clock", I just
  
  806   Thu Dec 17 11:31:34 2020 Stefan Rittdrs sources on github?Not github, but bitbucket: https://bitbucket.org/ritt/drs4eb/src/master/

But development kind of stalled, so there
  
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