I opened a very old dtt, and did not check nor recall that it was set up for an injection, and then I hit start, and for approximately 1 second there was an excitation on H1:SUS-IM2_M1_TEST_L_EXC.
Attached are two plots. The first shows the EXCMON signal, the length, pitch, and yaw DAMP signals, and the MASTER_OUT signals for each OSEM. The second plot shows the EXCMON signal, the length, pitch, and yaw DAMP signals, and the OSEMINF signals. There was an effect on IM2, seen in the Master_OUT and OSEMINF swignals, and an unknown effect on H1.
The IFO should automatically be taken out of observe when an injection happens. Reading the alog above, it sounds like you are saying that this didn't happen. Was the intent bit really observe while this injection was happening?
The IFO was not in OBSERVE at the time of the excitation (1=True for the 'OK' channels):
The IFO node didn't go OK until about 45 seconds later; The DIAG_EXC node that monitors AWG injections was already not OK:
2020-03-09_20:15:15.145648Z DIAG_EXC [RUN_TESTS.run] USERMSG 0: EXC: susim excitation!
2020-03-09_20:15:15.220819Z IFO [READY.run] USERMSG 0: DIAG_EXC: has notification
2020-03-09_20:15:15.291508Z IFO [READY.run] USERMSG 1: waiting for node: DIAG_EXC
2020-03-09_20:15:15.333495Z IFO JUMP target: WAITING_FOR_NODES
2020-03-09_20:15:15.334183Z IFO [READY.exit]
2020-03-09_20:15:15.334183Z IFO STALLED
2020-03-09_20:15:15.400427Z IFO JUMP: READY->WAITING_FOR_NODES
2020-03-09_20:15:15.401093Z IFO calculating path: WAITING_FOR_NODES->OBSERVE
2020-03-09_20:15:15.401093Z IFO new target: READY
2020-03-09_20:15:15.402705Z IFO executing state: WAITING_FOR_NODES (20)
2020-03-09_20:15:15.471219Z IFO [WAITING_FOR_NODES.run] USERMSG 0: DIAG_EXC: has notification
2020-03-09_20:15:15.474856Z IFO [WAITING_FOR_NODES.run] USERMSG 1: waiting for node: DIAG_EXC
2020-03-09_20:15:56.341314Z IFO JUMP target: READY
2020-03-09_20:15:56.341912Z IFO [WAITING_FOR_NODES.exit]
2020-03-09_20:15:56.341912Z IFO STALLED
2020-03-09_20:15:56.388676Z IFO JUMP: WAITING_FOR_NODES->READY
2020-03-09_20:15:56.391380Z IFO calculating path: READY->OBSERVE
2020-03-09_20:15:56.391380Z IFO new target: OBSERVE
2020-03-09_20:15:56.391380Z IFO executing state: READY (50)
2020-03-09_20:16:36.396095Z IFO REQUEST: OBSERVE
2020-03-09_20:16:36.397782Z IFO STALL cleared
2020-03-09_20:16:36.400184Z IFO calculating path: READY->OBSERVE
2020-03-09_20:16:36.448505Z IFO EDGE: READY->OBSERVE
2020-03-09_20:16:36.449190Z IFO calculating path: OBSERVE->OBSERVE
2020-03-09_20:16:36.449967Z IFO executing state: OBSERVE (100)