This is an old revision of the document!
Installed Debian Etch & mark5b software as per instructions on the haystack website. The pdf & iso's are temporarily located on hobart in ~oper.
After this process, the mark5b was ready for use. The only change to the system is that the
Mark5B recording server program is no longer invoked by
Mark5B but instead by
The syntax of commands is otherwise the same. This change in observing program may also have fixed the dot problem noted in test recordings where multiple recordings would all be recorded as having the same start time, until a new
dot_set=:force command was issued.
One of the mark5Bs destined for either Ka or Yg has also been upgraded at this time (hardware id 733).
Booted Mark5B initially with no network connection to avoid DHCP problems.
After logging in as root, changed passwords of both root and oper to the observatory standards.
Edited /etc/network/interfaces/ (with
nano /etc/network/interfaces/) to read
iface eth0 inet static
Rebooted and connected network cable. Network ok.
To configure the mark5b for recording from the dbbc, first set the mode on the dbbc (though dbbc_control) with
dbbcmode=astro. This sets the VSI output and track selection correctly.
For a test recording, start the mark5b software in an xterm with
mark5b -m0 &
In a second xterm, start the recorder interface with
This will bring up a prompt at which you can issue the following commands
clock_set=32:ext (To synchronise the dbbc clock to the32 MHz VSI clock)
This last command will return a string which should have the correct date and time, with
FHG_off. Next, set the mode on the recorder and then you can start the recording.
record=off to stop).
Data can be checked with
scan_check? (which returns the start time, duration and number of bytes rercorded, as well as somme other flags) and the amount of data recorded can be obtained from
pointers? which reports the current tally of recorded bytes.
To export the data from the mk5 module into a file, at the
tstdimino prompt, use
The example command given above will record 1 billion btyes of data, starting from 0, into the file
/home/observer/disk2file/testfile. Space is relatively limited on the mark5b partitions so don't do this for large files. Instead you'll need to set up a network partition - http://www-ra.phys.utas.edu.au/wiki/index.php?n=MtPleasant26m.Computing has some instructions for Hobart.