Sometimes the DBBC needs reprogramming because channels have been dropped or spectra look strange. To do this, preferable in a gap between scans, follow the following steps:

1. Open a VNC connection to the DBBC. At Hobart, connect to 131.217.63.248:0

   vncviewer -shared 131.217.63.248:0

2. You should see a console window named DBBC Control.exe. At the Enter Command: prompt, type

   Enter Command: reconfig

   The DBBC will be reprogrammed, which takes about 2 minutes.

3. It is then necessary to make sure the DBBC is synchronised with the station PPS:

   Enter Command: pps_sync

   You should then see a row of LEDs on the DBBC flash in sync, once a second.

4. Lastly, the Mark5 time needs synchronising. To do this, open a terminal on pcfsya and type

   fmset

   In the interface, type S followed by y, then press the ESC key.

5. In the oprin window on pcfsya, type

   mk5=dot?

   and check that you see syncerr_eq_0 and FHG_on (or FHG_off). If you see something like syncerr_gt_3 then fmset may need to be run again.