Displaying report 1-1 of 1.
Reports until 15:39, Tuesday 13 January 2015
H1 SYS
daniel.sigg@LIGO.ORG - posted 15:39, Tuesday 13 January 2015 (16047)
Timing comaparator/frequency counters

Version 3 (svn tag 97) FPGA code was loaded into all timing comparator/frequency counters. This addresses:

There can still be a problem with crosstalk between channels, especially at frequencies above 200 MHz and signals stronger than 0 dBm. This has only been seen in open channels with no input. Channels with an RF input signal don't seem to suffer from it.

The CER and EX units were swapped with units which had a proper heatsink installed for the 5 V regulator. The following units were modified:

Serial Location Heatsink Code
S1107952 CER installed 3
S1201886 EX installed 3
S1201222 EY installed 3
S1201227 shop (MSR)   3
S1201224 shop (spare)   3
Displaying report 1-1 of 1.