Read manual, added attenuation to input 10 MHz reduce amplitude to ~-1 dBm rather than 9 dB.
Re-tightened internal and external SMA connections - none were loose
Removed moderate quantity of bugs from input fan, PSU area.
Removed fan and cleaned with compressed air.
Voltages Measured at Supply:
PS1 - Multimeter AC Volts all zero. Ripple present with ~2 MHz frequency.
PS2 - Multimeter AC Volts all zero. Ripple present with ~2 MHz frequency.