I tried to lock both the north and south this afternoon and ran into issues with engaging the lock.
First: when I plugged the laser PZT into a HV amp and scanned the voltage I couldn't see an error signal on the oscilloscope for the south path. I didn't get to the bottom of why this is the case. I got as far as checking the 14.75 MHz modulation was on, checking electronics were powered and connected properly and sticking a high impedance oscilloscope probe directly into the field box. Tracking down what is going on here is the first order of business tomorrow morning.
Second issue: I also checked the level of the voltage going into the digital switch U1 (pin 20) on the D040105 board in the field box. This was registering nothing. I tracked this back to no voltage out of the acromag digital logic outputs. Through various iterations of dissembling the TTFSS Ethernet controller box I found that the culprit was the DC level of the external excitation voltage supplied to the Acromag. It activates on >= 5.1 V but not below 4.9 V supply. The level supplied by the LM7805 (from 24V line) is below 5.0 V -- many of these regulators are -- so the it is failing to provide any voltage at the output of the digital outs. I suspect that the plug pack we were previously using was also doing such things intermittently (it looks cheep). Tomorrow's second order of business is finding a plug pack that supplies a generous 5.1+ volts and connecting barrel connectors into the TTFSS Ethernet module.
If we can't resolve the Ethernet module digital issues we should go ahead and manually lock to take a beat not spectrum tomorrow afternoon.