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Message ID: 2425     Entry time: Fri Sep 13 16:40:56 2019
Author: anchal 
Type: DailyProgress 
Category: BEAT 
Subject: New channel added; BNSignUpdate made better 
  • I added C3:PSL-PRECAV_BEATNOTE_FREQ_SLOPE2 as a new channel. This holds the seconds derivative of precavtybeatnote frequency in Hz/s/s.
  • The slope calculation code is separated now from sign update code.
  • Slope is now calculated with moving averageof changing quantity over 10s. This gives much better estimates of both the slopes.
  • Sign update is also more robust now. It checks if frequency counter is stuck for atleast 0.5s and last read BN frequency was less than 5 MHz.
  • Sign update also has a dead time on its trigger of 1 minute to avoid changing sign multiple times in a single jump.
  • So far, the sign update code is working eallygood. Hopefully, the cavity temperature control will not loose track now.
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