- First make sure that econtrol is running for the antenna you wish to monitor.
  - In econtrol, in the "Logging and Operator Input" section, click on the red dot icon ("record the logfile"):\\ {{:operations:econtrol_log_area.jpg|}} \\ This will open a dialog window where you need to give a name for the log file to be saved. Select the "Browse for other folders" option, then double-click on "File System" about half way down on the left, then under the "Name" column to the right, double-click on ''vlbobs'', then on ''ivs'' log, then on ''logs''. Finally, give the log file a name at the top of the dialog. Suggested syntax is <code><experiment_name>_<station_code>_econtrol.log</code>e.g.: a file is saved in this location <code>/vlbobs/ivs/logs/r4456_yg_econtrol.log</code>
  - The red dot icon in econtrol should now show a green bar in the top left to indicate that the log is being recorded:\\ {{:operations:econtrol_log_recording.png|}}
  - Type a command into the Operator Input section (next to the blue triangle) so that the new log file is created. e.g. <code>clkoff</code>
  - Open a terminal window on ops4
  - type the following: <code>pcfs_log_monitor.pl <log_file_name></code>. e.g. if you used the recommended syntax: <code>pcfs_log_monitor.pl r4456_yg_econtrol.log</code>.
  - You will be asked which station is being monitored (type 1, 2 or 3) and then the GUI will start.
  - At the moment, this program will 
    - monitor the difference in delays between maser and GPS and formatter and GPS, and sound an alarm if they differ by more than 1 us
    - watch for all other error messages and either beep or sound an alarm depending on severity
    - watch for Mark5 sync errors that require fmset to be run.
  - You can acknowledge an alarm which will turn off the siren

Note the log monitor script can also be started on ops6 (the PC in the "Lounge"). Just open a terminal window and repeat steps 5 and 6 above. You don't need to start econtrol on ops6 (but you can if you want), and please **don't** start another log file recording through econtrol on ops6. Both ops4 and ops6 share the /vlbobs directory, so log recording needs to be started only from one place.