I saw a big RAM offset in REFLAIR_RF45 and didn't like it. So I changed the modulation frequency to 9099170 Hz where the RAM offset became zero. This frequency is consisent to what Alexa got (see alog 9679) in her IMC length measurement.
Before this change, the mod frequency was at 9099471 Hz and the RAM offset was 3000 counts in REFLAIR_RF45_Q with its whitening gain at 21 dB and with PRM aligned.