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Entry  Fri Oct 18 17:35:07 2019, gautam, Update, SUS, ETMX sat box disconnected 
    Reply  Mon Oct 21 16:02:21 2019, gautam, Update, SUS, ETMX over the weekend filteredData.pdf
Message ID: 14977     Entry time: Fri Oct 18 17:35:07 2019     Reply to this: 14982
Author: gautam 
Type: Update 
Category: SUS 
Subject: ETMX sat box disconnected 

Koji suggested systematic investigation of the ETMX suspension electronics. The tests to be done are:

  1. Characterization of PD whitening amplifiers - with the satellite box disconnected, we will look for glitches in the OSEM channels.
  2. Characterization of LT1125s in the PD chain of the amplifiers - with the in-vacuum OSEMs disconnected, we will look for glitches due to the on-board transimpedance amplifiers of the satellite box.
  3. Characterization using the satellite box tester - this will signal problems with the physical OSEMs.
  4. Characterization of the suspension coil driver electronics - this will happen later.

So the ETMX satellite box is unplugged now, starting 530 pm PDT.

The satellite box was reconnected and the suspension was left with watchdog off but OSEM roughly centered. We will watch for glitches over the weekend.

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