====== Making a Test Recording ======

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

<code>disk_record=on
mk5=dot?                 (Output should appear as before, but it should say FHG_on)
disk_record=off</code>
Now check the data are OK:
<code>scan_check</code>
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:
<code>postob</code>
The output should appear in the pcfs[hb|ke|yg] VNC session. Good data should contain quite flat bandpasses and zero phase. See [[operations:monitoring_autocor|autocorrelation spectra plots]] for an example and what problems to look out for. If there are dropped or strange-looking bands, the [[hardware:dbbc.reprogram|DBBC may need reprogramming]].

To clear the disk module, ONLY IF YOU'RE CERTAIN there is no useful data (e.g. from a previous experiment) already on the disk!
<code>mk5=protect=off
mk5=reset=erase </code>

Now repeat this test on the second module (if it's loaded):

Swap the module with the following commands:
<code>
mk5=bank_set=inc
ready_disk
</code>
Then repeat the test. Lastly, go back to the first module:
<code>
mk5=bank_set=inc
ready_disk
</code>