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VIS (SRM)
fabian.arellano - 20:56 Friday 30 November 2018 (7215) Print this report
LVDT driver characterization (complete set of values)

Here is the table with the complete set of values for the six channels. An incomplete set was reported in entry 7033. The following applies:

  • Input signal: 4.86 Vpp at 10 kHz.
  • The input gain is the amplitude measured at the probe point (P0, P1, P2) divided by the amplitude of the reference signal (measured at probe point REF_SIG at the central board).
  • For some devices the phase was set to zero by visual inspection using an oscilloscope.
  • Phase measurements were recorded in photos which are uploaded to NAOJ's Google Photos.
  • This information should also be found in SRM information page.
LVDT Input gain Output gain resistance (Ohm) Phase (µs) Board and probe point
BF 0.975 57.1 21, signal at probe point ahead. left board, P0
SF 0.977 57.5 20, signal at probe point ahead. left, P1
F0 0.975 32.86 zero left, P2
IP #1 0.975 31.75 zero right, P0
IP #2 0.975 31.2 zero right, P1
IP #3 0.971 31.8 zero right, P2
Comments to this report:
fabian.arellano - 14:52 Wednesday 19 December 2018 (7437) Print this report

This is the updated table after a change in the F0 channel of the LVDT driver board. See entry 7427.

LVDT Input gain Output gain resistance (Ohm) Phase (µs) Board and probe point
BF 0.975 57.1 21, signal at probe point ahead. left board, P0
SF 0.977 57.5 20, signal at probe point ahead. left, P1
F0 0.975 64.4 16, signal at probe point ahead. left, P2
IP #1 0.975 31.75 zero right, P0
IP #2 0.975 31.2 zero right, P1
IP #3 0.971 31.8 zero right, P2
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