Filiberto and Kiwamu

Filiberto swapped the delay line phase shifter that has been used for the IMC length PDH demodulation at the R1 field rack because the right half of the unit had malfunctioned (see 6282 from May.2013). Since we were not locking the IMC most of the time today, we took this opportunity to swap it. The delay logic is set the same as that of the old one. In principle, this should not impact on the PDH demodulation, but we just have to keep this in mind. The attached picture is the setting of the delay logic of the old unit. Note that the logic was optimized for the RF phase as of December 3rd (see alog 8792 from yesterday).