Operating instructions

SEA M300USERSGUIDE
MAINWINDOW  68
PLAYBACKTAB
The playback tab displays some information about data being played back on the M300. Here the
user can change the speed of playback and jump to any point within the data being played back, as
well as get a snapshot of how far into the file the M300 is.
Note: Theplaybacktabisonlyapplicablewhilethesystemisinplaybackmode. DuringacquisitionandUDP,
theM300disablesthecontrolsinsidetheplaybacktab.
PlaybackPeriod
Controls the speed at which M300 handles data for the playback mode.
During playback, the M300 will attempt to read a buffer, place this buffer in shared memory and
inform all workers that a buffer is ready to be worked on. The playback period/frequency controls
how fast the worker is called. The worker reading the data will not generate an M300 buffer per each
time it’s called. Basically, the user has control on how fast to playback.
If the user picks 1 ms playback period, this sets the M300 worker responsible for reading the data to
do it as fast as possible.
The playback period is converted into a playback frequency. A playback of 0.002 s, results 500 hz
frequency. A playback of 2 s, results in 0.5 hz.
Dragging the side bar to the left and right has the same effect as changing the playback period.
The M300 remembers the playback speed on exit. If you are trying to playback data and it seems
slow, just check the playback period on the playback tab.
FileScrollBar
Controls where in the file the file pointer is currently at. Clicking and dragging the scroll bar allows
the user to select which section of the data file to playback.