[Dick, Daniel, Koji]
The POP 2f demodulator unit previously installed on row 28 of the ISC R2 rack (c.f. this entry ) was replaced with the 2f demod unit.
This unit has a 24MHz LPF and a 80MHz HPF on CH1 and CH2, respectively, forming a diplexer configulation for 18MHz (2xf1) and 90MHz (2xf2) signals.
Therefore, the temporary power splitter for the POP 2f path was removed.
Because of this action, we expect that the demod phase for the POPAIR18 and POPAIR90 were changed.
The 3f demods (CH3/4) still have the power splitter. This will be removed when the 3f diplexer unit is installed on row 27.
We also cleaned up some of the RF cables:
- The REFLAIR9 cable plugged on row 34 is now routed through the patch panel on row 27.
This means that the demod phase of the REFLAIR_A_RF9 was changed.
- The cable for REFL9 was made and connected to the demodulator on row 34.
- Unnecessary connectors/cables were removed from the patch panel on row 29.
We also added the cables between the greeen PFDs and the PLL error signals, as well as 2-pin LEMOs between the PLL servo outputs and the VCO tune inputs.
Then I adjusted the demod phase of REFLAIR_A_RF9 by toggling the swtiches of the phase shifter. This was adjusted for PRX. I haven't done it for REFL_A.