Module swaps should be coordinated with local staff at the observatories and should only occur at the start of a System Check period. Remember that not all System Check periods require a module swap. Before a module is swapped, you and the local person must agree, on the phone, that both modules are idle.
and if it isn't, change to the correct one with a
, wait about 10 sec, then do and another
Note that you can view the Mark5 recorder and the status of the modules remotely using the control room Pan-Tilt-Zoom (PTZ) web cameras: