DRS4 Forum
  DRS4 Discussion Forum, Page 38 of 44  Not logged in ELOG logo
New entries since:Thu Jan 1 01:00:00 1970
ID Date Authorup Subject Text Attachments
  830   Mon Aug 9 12:50:31 2021 Stefan RittC code to read the 4 channel with external triggerSorry the late reply, I was on vacation. 

Here are some answers:

1. I'm sorry I can't help
  834   Sat Sep 18 15:47:50 2021 Stefan Ritthow to acquire the stop channel with 2x4096 cascading The problem must be on your side, since
the Write Shift Register readout works in
other applications with the DRS4 chip. So
  835   Sat Sep 18 15:48:30 2021 Stefan Rittdrs_exam_multi with non-v4 boards, default configurationHi,

please note the the evaluation
board is what it says, a board to evaluate
  838   Thu Oct 14 15:25:07 2021 Stefan Rittlivetime (or deadtime) of DRS4 evaluation boardThe one thing you can do easily is to look
at the scaler values. If one channel counts
all physical events, and you have all read
  840   Thu Oct 14 18:42:31 2021 Stefan Rittlivetime (or deadtime) of DRS4 evaluation boardI would say not exactly, but it's a
good approximation.

  844   Tue Oct 26 12:00:51 2021 Stefan RittExternal trigger and drs_exam1. Why should your waveform start from
0 to 5ns? I don't get your point. Whenever
you trigger a readout, you get a 200ns wide
  845   Tue Oct 26 12:02:56 2021 Stefan RittTrigger multiple boards independentlyUnfortunately an independent operation
from a single computer is not supported by
the software. You can try to modify the drs_exam
  848   Wed Oct 27 08:11:42 2021 Stefan RittTrigger multiple boards independentlyI'm not sure if the rate would go up
to 2 kHz (not 2 GHz!). Depends how the USB
hub is designed. What you can do however
  852   Tue Nov 16 08:51:14 2021 Stefan RittV3 board, only one channel works, all components at each channel input workingA V3 boards is already 10 years old and
out of warranty. The software has no configuration
to turn channels off except the channel buttons
  855   Mon Jan 3 17:13:41 2022 Stefan RittDRS4 request assistance1. fDOMINO is defined as fREFCLK * 2048

2. Good values can be derived from
the evaluation board schematics: C1=4.7nF,
  857   Sat Jan 15 10:50:47 2022 Stefan RittI want to know about the readout

  859   Tue Jan 25 14:34:42 2022 Stefan RittRegarding measuring for a set timedrsosc is a graphical application contiously
acquiring data from the board, and drscl
is a command line tool for debugging, as
  864   Tue Feb 15 12:02:29 2022 Stefan RittCannot trigger on pulses, have to trigger on undershootThe trigger comparator is a ADCMP601 unit
which requires a minimum pulse width of 3-4
ns. I see that your pulses are only 1-2 ns
  868   Thu Mar 3 13:47:26 2022 Stefan RittHow to convert samples to volt?The 'drscl' tool is more for experts,
normal users are advised to use the DRSOsc
  869   Thu Mar 3 16:14:16 2022 Stefan RittScaler issue to evaluate live time The scalers are read out 10x per seconds,
so they have an accuracy of 10 Hz. I tried
a 50 Hz pulser, and measured 40 Hz, I tried
  872   Mon Mar 7 08:45:32 2022 Stefan RittWhy does not trigger at higher sampling frequencies?Unfortunately I have not idea what the
problem could be. In principle the trigger
should be independent of the sampling speed,
  874   Mon Mar 7 16:37:54 2022 Stefan RittScaler issue to evaluate live time I tried your measurement with the DRSOscilloscope
app (see below), and I measure a constant
difference of 10 Hz among the whole range
  878   Sat Mar 12 10:13:24 2022 Stefan RittTime calibration and the C++ APIDRSBoard::GetTime is declared in DRS.h
line 720.

If you want to measure timing down
  880   Mon Mar 14 08:59:51 2022 Stefan RittTime calibration and the C++ APILooks like you have the some time calibration,
not sure if it's the correct one. Sample
the sine wave from the calibration clock,
  883   Tue Apr 12 10:49:27 2022 Stefan Ritt A3-A0 = 1001 should be all you need to
activate OUT0-OUT7. It works in our designs.
Maybe double check the address lines with
ELOG V3.1.4-bcd7b50