Since we plan to do some TCS tests on the IFO in the near future, I recommend we make use of the AWGLines guardian, which injects a variety of lines that can be used to monitor things like noise couplings and optical gain changes.

Taking a quick survey of the guardian, I don't see any immediate issues. The guardian injects these lines: intensity noise (47.3 Hz, 222 Hz, 4222 Hz), frequency noise (25.2, 203, 4500 Hz), jitter (111.3, 167.1, 387.4 Hz), and MICH (40.7 Hz), PRCL (35.3 Hz) and SRCL (38.1 Hz). There is an additional state that engages the 8.125 Hz notches in the ASC and then injects one ASC line. The guardian is currently set up to inject in CHARD Y (8.125 Hz), but that can be adjusted to any ASC loop. The amplitude for the CHARD Y injection looks good, but that will need to be adjusted for other ASC loops. I have no idea if the laser noise and LSC noise line amplitudes are "good", but we ran this guardian regularly before O4 started so they are probably ok.

It does not appear that any notches or bandstops are engaged for the laser noise or LSC injections. Not sure if we want to change that. The cable for frequency noise will need to be plugged in to ensure the frequency noise gets injected.

The way the states are currently written, you will need to manual to "SET UP ASC INJECTIONS" to ensure the ASC line gets injected before going to "INJECTING". The "STOP INJECTING" state will stop all the injections, including the ASC injections and revert all changes such as switches and filters.