When an active connection to the Perseus hardware has been created, JAGUAR always uses a buffer file on the hard disk, making it possible to play back several frequencies close to real time. By default, the buffer file size is 10 minutes (when using the bandwidth of 1.6 MHz) or 8 minutes (when using the bandwidth of 2 MHz).
A new file is always created when the buffer file reaches the upper limit.
When the Perseus connection is activated, the system does an "automatic minute adjustment" breakpoint so that TOHs and BOTs will be positioned to the center of the JAGUAR screen. This function is skipped if manual recording is activated before the breakpoint.
You can re-create a new buffer file also manually any time by pressing ALT-B. However that is seldom needed because the "automatic minute adjustment" relocates the file breakpoints to HH:55 (for 1.6MHz files) or HH:56 (for 2MHz files) for TOHs and HH:25 (for 1.6MHz files) or HH:26 (for 2MHz files) for BOTs. This ensures that a file breakpoint will never happen at the top of the hour (TOH) or at the bottom of the hour (BOT), and that the TOH / BOT times are exactly at the center of the JAGUAR display.