[Dsg-hallb_magnets] 2017-01-19 Torus Fast-Daq filter results + 2017-01-20 filter test plan

[Tyler Lemon]

Hello, 

Yesterday, the two filter configurations I tested did not visually affect signals. The results of yesterday's filter tests are as follows: 

Test 1 : Notch filter centered at 60Hz with bandwidth +/- 10Hz. Filter did not have any visual affect. Root file in analyzer torus_20170119_134700.root corresponds to one minute of data recorded with this filter in use. 

Test 2 : Notch filter centered at 60Hz with bandwidth +/- 15Hz. Filter did not have any visual affect. Root file in analyzer torus_20170119_154725.root corresponds to 1.5 minutes of data recorded with this filter in use. 

Today, I plan to test notch filters centered at 60Hz with bandwidth ranging from +/- 20Hz to +/- 30Hz. After testing the notch filters, I will try a lowpass filter with cutoff frequency set at 50Hz. 

Today's testing will start at about 9:00AM. 

Best regards, 
Tyler 


From: "Ruben Fair" <rfair at jlab.org> 
To: "Tyler Lemon" <tlemon at jlab.org> 
Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org> 
Sent: Thursday, January 19, 2017 1:44:07 PM 
Subject: Re: [Dsg-hallb_magnets] Starting Torus Fast-Daq filter tests 

Thank you 

R 

On Jan 19, 2017, at 1:35 PM, Tyler Lemon < tlemon at jlab.org > wrote: 




Hello, 

At 1:45PM, I will start testing digital filters for the Torus Fast-Daq cRIO. This should not affect the cool down. Fast-Daq data will be logged during the tests via EPICS so there will be a log of any changes in the signals. 

Best regards, 
Tyler 




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