[Vetroc_daq_sbs] Pedestals

[Bogdan Wojtsekhowski]

Hi Carlos,

How much time it takes to make the plot?
I can come and look the setup 
tomorrow or Friday afternoon.
Please let me know when you like to meet.

Bogdan

----- Original Message -----
From: "Carlos Gayoso" <gayoso at jlab.org>
To: "Vetroc_daq_sbs" <vetroc_daq_sbs at jlab.org>
Cc: "Todd Averett" <tdaver at wm.edu>, "Bogdan Wojtsekhowski" <bogdanw at jlab.org>
Sent: Wednesday, November 16, 2016 6:45:07 PM
Subject: Pedestals

Hi all,

as Bogdan suggested, I measured the v792 pedestals with the filter he provided. 

There are 5 measurements:
- without any data cable connected to the ADC module (x1)
- with data cable connected to the ADC module, without the filter. With the PMTs ON and OFF (thus x2)
- with data cable connected to the ADC module, with the filter. With the PMTs ON and OFF (thus x2)

The gate width is 120 ns.

I think the attached plot is self explanatory. I will check why the histogram 24 is showing such behavior, but the rest of the channels seem to be normal. 

Unless I have a different criteria, I could say that the difference with and without filter is practically zero.  

I guess we can continue without the filter in order to set the optimal PMT HV to take the measurements with the NINO cards (they are already calibrated). Sure, it won't hurt using it and I will.  

Of course, any suggestion, feedback or advice is appreciated and welcome. 

Evan, meanwhile, has been pushed VETROC under controlled conditions (with a pulse generator) as Bob suggested us. 

Thank you

-Carlos