Now make a test recording using the Mark5. This is done through the Operator Input window.

disk_record=on
mk5=dot?                 (Output should appear as before, but it should say FHG_on)
disk_record=off

Now check the data are OK:

scan_check

Check the last numbers are the correct date at the start of the scan, duration, the data rate (should be 256 for the 8MHz mode, 128 for the 4 MHz mode) and 0 at the end for no problems. Then plot an autocorrelation from the data:

postob

The output should appear in the pcfs[hb|ke|yg] VNC session. Good data should contain quite flat bandpasses and zero phase. See autocorrelation spectra plots for an example and what problems to look out for. If there's a problem, the DBBC may need reconfiguring.

To clear the disk module, ONLY IF YOU'RE CERTAIN there is no data already on the disk!

 mk5=protect=off; mk5=reset=erase 

Check that the spectra are OK. If there are dropped or strange-looking bands, the DBBC may need reprogramming.