Alan Knee, Camilla Compton, Evan Goetz

We changed the SQZ ADF frequency from 322 Hz to 10 kHz where it should not impact long duration searches (figure), using the command 'python /opt/rtcds/userapps/release/sqz/h1/scripts/ADF/setADF.py -f 10000'. This line appeared in DARM during O4a when it was set to 1300 Hz. It was moved from 1300 Hz to 322 Hz around 1397588061 (2024/04/19 18:54:03 UTC, figure), and was visible in Fscan spectra in O4b (figure).

This line was previously turned "off" on 2024/04/04 (see 76962), but was still visible in DARM (at reduced amplitude) due to the RF driver being left on. You can see the change in behaviour in the attached line height plots. The first shows the height of the 1300 Hz line during April 2024, where the line is at first "on", decreases in strength after April 4, and then disappears on April 19 when it was moved to 322 Hz. The second shows the height at 322 Hz, which appears on April 19.