NOEMA April 2019

R2DBE setup

Clock  2048 MHz clk, 0 +- 3 dBm 50 ohm

Driven by 5 MHz H-maser locked R&S SMB 100A

HB input from GPS 1PPS

1PPS ref input from Maser 1PPS, to utilize internal counter-comparator in addition to separate external 1PPS GPS-MASER unit

Control computer setup

Enabled ip4 NAT/masquerade to allow Mark6's to use further NTP, and access the internet for installing DiFX for zero baseline tests

Added jwagner as publickey-only auth (/etc/ssh/sshd_config section like "Match User daan").

Reverted back to the R2DBE scripts from SAO-EHT https://github.com/sao-eht rather than Radbout written-from-scratch "vlbicontrol" (we have not tested it, especially not for GMVA, and no earlier experience since neither NOEMA nor APEX were in the EHT dress rehersal)