This morning, following the last failed acoustic injections #67509 (despite the loudspeaker being left powered), a few tests were carried out to investigate and fix the problem with the smart PDU (Loudspeaker_PDU).

• Test 1: All acoustic injections via METRATON → failed

• Test 2: Only NEB and WEB acoustic injections via METRATON → successful

• Test 3: Only CEB acoustic injection via METRATON → failed

• Test 4: Only CEB acoustic injection via AcousticInjectionCEB VPM process→ failed

• Test 5: Only CEB acoustic injection via ENVnoise VPM process → successful

From Figure 1, the problem seems to be related to a loss of communication with the PDU. As a temporary workaround to enable acoustic injections, the code lines handling the switch-on/off were commented out:

• code: /virgoDev/EnvSwepts/v3r0/scripts/AcousticColoredInjection_v1.py
• lines: #177, 282, 283 

After this modification, both CEB-only acoustic and all acoustic injections via METRATON were successfully tested, Figure 2.

The issue should ultimately be fixed by addressing the malfunction of the smart PDU.