 Fri Apr 1 22:09:07 2016, Chris Thompson, Trigger on the And of a positive and negative signal
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The coilcraft part number is: JA4220-ALB. Iordered two of them and they were sent as free samples. You might want to buy some slightly bigger
ones. I found them so small it was very hard to solder the coax cable to the connectors. Since I got them, I managed to damage one as they are quite fragile!
In the confirmation email I got there was some contact info which may be useful for you: "For help, contact Victoria Berner |
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Sat Apr 2 17:22:34 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal
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Thanks again, this is very useful, just another question did you put any other passive elements in the circuit for inverting the signal
or just simply swaped the transformer connections?
Chris |
Sun Apr 3 22:10:19 2016, Chris Thompson, Trigger on the And of a positive and negative signal 
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No there are no other components. I put a photo of the inverter with its cables SMA and one end, BNC at the other. You can see it is very small. I glued
the inverter to a piece of thin plywood, and fixed the cables to it before attempting to solder them to the pads on the ferite bead support
Abaz |
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Sun Apr 3 22:34:28 2016, Abaz Kryemadhi, Trigger on the And of a positive and negative signal
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Thanks, great!
Chris
Thompson wrote:
No there are no other components. I put a photo of the inverter |
 Mon Dec 14 10:14:16 2009, Jinhong Wang, Trigger of DRS4
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Dear Mr. S. Ritt
The following is my confusion about the trigger of DRS4. It mainly concertrates on the generation
of trigger signal to stop DRS4 sampling process for readout of sampled waveform. |
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Tue Dec 15 14:38:09 2009, Stefan Ritt, Trigger of DRS4
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Jinhong Wang wrote:
Dear Mr. S. Ritt |
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Mon Dec 21 10:17:05 2009, Jinhong Wang, Trigger of DRS4
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Stefan Ritt wrote:
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Mon Dec 21 16:52:08 2009, Stefan Ritt, Trigger of DRS4
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Jinhong Wang wrote:
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Tue Dec 22 01:30:55 2009, Jinhong Wang, Trigger of DRS4
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Stefan Ritt wrote:
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Tue Dec 22 09:07:27 2009, Stefan Ritt, Trigger of DRS4
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Jinhong Wang wrote:
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Mon Oct 25 18:48:04 2021, Javier Caravaca, Trigger multiple boards independently
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Hello,
I recently acquired 4 DRS4 boards and I wanted to ask if it was possible to trigger them independently from the same computer.
I know that you can daisy-chain boards and trigger them all at the same time, but in my case, each of my boards record independent events, so |
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Tue Oct 26 12:02:56 2021, Stefan Ritt, Trigger multiple boards independently
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Unfortunately an independent operation from a single computer is not supported by the software. You can try to modify the drs_exam program and extend
it. You can poll all boards in sequence and just read out that one which got a trigger, then start the loop again. But I don't know how good you are
in programming. I needs a bit of experience to do that. |
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Tue Oct 26 23:18:32 2021, Javier Caravaca, Trigger multiple boards independently
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Thank you Stefan. Actually I noticed that the source code of drs_exam was available after I started this thread, and that was the solution that
occurred to me too. I'll give that a try.
A related question is: if the 4 boards are triggering at max rate (500Hz), would the total data throughtput (of the four boards together) be |
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Wed Oct 27 08:11:42 2021, Stefan Ritt, Trigger multiple boards independently
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I'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 is to buy 4 RaspberryPis
(total cost 150$) and run everythign in parallel. The evaluation boards works nicely with the Pi's.
Javier |
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Sun Sep 23 02:22:46 2018, Gerard Arino-Estrada, Trigger OUT pulse width variable from 100 us up to 100 ms
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Hello Stefan,
I am using the DRS4 board connected to a Raspberry PI and through the drsosc application. I am interested on using the "Trigger OUT"
signal to do some extra data processing with NIM modules. According to the manual, for each hardware trigger a TTL pulse of 150 ns width should be send |
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Wed Sep 26 14:44:14 2018, Stefan Ritt, Trigger OUT pulse width variable from 100 us up to 100 ms
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The "Trigger OUT" has changed recently. It goes high on a new trigger, but then STAYS high until the board has been read out by the PC and
re-started. This allows better synchronization with some external trigger, which can be re-armed with the falling edge of the trigger out signal. The signal
can be quite long, since readout of an event via USB typically takes 2 ms, but can be more if the PC is busy. If you need back your 150 ns pulse, |
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Wed Sep 26 18:25:07 2018, Gerard Arino-Estrada, Trigger OUT pulse width variable from 100 us up to 100 ms
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Thank you very much for the answer, I really appreciate your help.
Thanks!
Gerard |
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Wed Sep 26 18:28:20 2018, Gerard Arino-Estrada, Trigger OUT pulse width variable from 100 us up to 100 ms
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Thank you very much for the answer, I really appreciate your help.
Thanks!
Gerard |
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Wed Sep 26 19:21:03 2018, Stefan Ritt, Trigger OUT pulse width variable from 100 us up to 100 ms
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In meantime I even updated the manual.
Stefan
Gerard |
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Thu Jul 18 01:03:44 2019, Ismael Garcia, Trace Impedance
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Hi Steffan,
I'm an engineer at UCLA developing a board with the DRS4 chip. Our team has a question on |