ID |
Date |
Author |
Subject |
Text |
 |
|
420
|
Wed May 13 16:25:24 2015 |
Stefan Ritt | transparent-mode voltage | To get the good linearity, you need indeed
ROFS = 1.05V. With a O-OFS of 0.9V, a zero
input signal would give you DRS_OUT+=1.05V |
|
|
419
|
Wed May 13 16:13:07 2015 |
Chenfei Yang | transparent-mode voltage | If using a ROFS of 0.9V, the input would
not between 1.05V~2.05V better non-linearity
area. Is that appropriate? |
|
|
418
|
Wed May 13 12:52:22 2015 |
Chenfei Yang | transparent-mode voltage | Yes. I use exactly the same scheme as you
mentioned. I'll try your solution.
|
|
|
417
|
Wed May 13 12:34:49 2015 |
Stefan Ritt | transparent-mode voltage | There might be a solution. How do you bias
th input of the
DRS4 chip? If you use a scheme as described |
|
|
416
|
Wed May 13 10:27:43 2015 |
Chenfei Yang | transparent-mode voltage | I'm using an AD9252, 0.9V common mode
voltage is suggested and I already use 8
un-switchable level shifters. Just as you |
|
|
415
|
Wed May 13 10:16:40 2015 |
Stefan Ritt | transparent-mode voltage | I see your point. Actually I will soon
have the same issue since we design right
now a board with an AD9637 using the transparent |
|
|
414
|
Wed May 13 09:55:09 2015 |
Chenfei Yang | transparent-mode voltage | Here's the problem. My external ADC
has 2Vpp differtial input voltage range.
And the common-mode voltage of the inputs |
|
|
413
|
Wed May 13 09:45:51 2015 |
Stefan Ritt | transparent-mode voltage | The ROFS signal has no effect in the transparent
mode, so you have to adjust O_OFS between
sampling and transparent mode accordingly. |
|
|
412
|
Wed May 13 09:31:18 2015 |
Chenfei Yang | transparent-mode voltage | Hello Mr. Stefan Ritt
For DRS4 differential inputs
ranges form 500mV to 1100mV, with ROFS set |
|
|
411
|
Wed May 13 08:19:53 2015 |
Stefan Ritt | Getting Trigger Source | DRSBoard::GetTriggerSource() simply returns
what has been enabled via DRSBoard::SetTriggerSource().
The actual source which causes the trigger |
|
|
410
|
Wed May 13 01:07:36 2015 |
Cosmin Deaconu | DRS4 Evaluation Board + Powered USB Hub | I am trying to use 4 evaluation boards
with a powered USB hub (since eventually,
I will have to do this on a laptop). |
|
|
409
|
Wed May 13 00:52:51 2015 |
Cosmin Deaconu | Getting Trigger Source | I'd like to be able to know which channel
(0,1,2,3 or external) was responsible for
the trigger. DRSBoard::GetTriggerSource() |
|
|
408
|
Tue Apr 21 13:06:39 2015 |
Stefan Ritt | DRS4 Evaluation Board Baseline/Voltage Calibration | Sure, for a V3 board you need a pre-V5
software, but I assumed Julien had a V5 board.
|
|
|
407
|
Tue Apr 21 13:03:38 2015 |
Daniel Stricker-Shaver | DRS4 Evaluation Board Baseline/Voltage Calibration | I also use Ubuntu 14.04 LTS and for my
V3 borad I have to use drsosc 4.x or ealier
to perform the calibration. |
|
|
406
|
Tue Apr 21 12:52:18 2015 |
Stefan Ritt | DRS4 Evaluation Board Baseline/Voltage Calibration | 1) I tried to cablirate a V5 board with
drsosc 5.0.3 and it just worked fine for
me. No idea what went wrong in your case. |
|
|
405
|
Tue Apr 21 12:01:45 2015 |
Stefan Ritt | DRSBoard::SetTriggerSource | Your first assumption is correct, e.g.
source = 00000000'00000001
= 0x0001 ==> CH1 |
|
|
404
|
Mon Apr 20 13:08:24 2015 |
Stefan Ritt | Clock settings in daisy chain DAQ | The resolution coming from the sampling
rate goes into these numbers, but just marginally.
At 5 GSPS, you get a few ps reolution, while |
|
|
403
|
Fri Apr 17 10:07:38 2015 |
Simon Weingarten | Clock settings in daisy chain DAQ | Hi Stefan,
do you know how these numbers (400ps
and 60ps) scale with the sampling rate? The |
|
|
402
|
Thu Apr 9 11:46:33 2015 |
Felix Bachmair | DRSBoard::SetTriggerSource | Hi
I have a question about the function
SetTriggerSource in the class DRSBoard (DRS.h/DRS.cpp) |
|
|
401
|
Sun Apr 5 22:16:48 2015 |
Julien Wulf | DRS4 Evaluation Board Baseline/Voltage Calibration | Hi,
I`m trying to calibrate my DRS4
evoluation board to an input range of 0-1V |
|