Attached is the analysis of the TDR and delay measurements for the REFL and POP RF sensors.
The 2 columns labeled "phase TDR" and "correction phase" are the calculated phase shifts from the TDR and phase measurements, respectively. A longer cable between the RF sensor and the demodulator will make this phase shift more negative (modulo 360°).
If I got the signs correct, this number needs to be subtracted from the current phase shift values. This is indicate in the highlighted column labeled "new Phase". If not, one can try the column "wrong Phase".
This is the same table assuming REFL WFS A and B were swapped after re-installation.
Sheila, Jennie W
We started updating the demod phases according to the 10th column in Daniel's first table:
We updated LSC-REFL_A 9MHz in beckhoff sitemap->SYS->Ethercat overview->ISCCorner->LSC->REFLA->9->PHASE
LSC-REFL_A 45MHz did not have a screen for phase in beckhoff as it doesn't have a phase shifter here, so we upated its phase in the front-end demod. sitemap->LSC->LSC Overview-> REFL_A_45 -> RD Rotation
We are skipping all of REFL B as hardware has been changed - will phase in full lock.
LSC-POP-A 9 MHZ updated in front end demod, found medm screen in similar way for LSC-REFL_A 45MHz.
We skipped LSC-POP-A 45 MHZ and will check later as commissioning team changed it on Friday.
We went through sdf, so need to redo above.
Updated phasing of four ASC-REFL_A_RF9 segments in front-end. These phases are accessed via sitemap->ASC->ASC Overview -> REFL-A_RF9 -> Settings and then change each of the R values in the phase(deg) column (black circles). This was sdfed in OBVs and safe.snap.
Updated phasing of LSC-REFL_A 45MHz in front-end demod and sdfed in OBVs and safe.snap.
Checked LSC-REFL_A 9MHz in beckhoff had not been changed by sdf revert, it had not.
We updated the phasing of LSC-POP_A 9 MHZ in front-end demod and sdfed in OBVS and safe.snap.
We updated the phasing of the four ASC-REFL_A_RF45 segments in front-end. sdfed in OBVs and safe. Found phase medm screens in a similar way for ASC-REFL_A_RF9.
We updated the phasing of the four ASC-REFL_B_RF9 segments in front-end. sdfed in OBVs and safe. Found phase medm screens in a similar way for ASC-REFL_A_RF9.
We updated the phasing of the four ASC-REFL_B_RF45 segments in front-end. sdfed in OBVs and safe. Found phase medm screens in a similar way for ASC-REFL_A_RF9.
Will need to phase POP X in full lock.
