The energy measurement uses scanners #1 to #4 with PMT read out. One PMT (PMT0) is in the BSY reading scanners #1 and #2. One other is in the Compton region (PMT1), reading scanners #3 and #4. They both are energized by the "beam line HV module", card#1 channel#0 (PMT0) and channel#1 (PMT1), under EPICS control of the general Hall A control. Both voltages must be -1200V, make sure that "Meas. V" indicates this voltage. If needed, push on "enable/disable" or edit the "SET V" field.