should require significantly less time than the recording itself.
In
manual recording
the triggering has to be performed through the key pad and may also be stopped this way. If
a manual stop does not occur, the recording will stop automatically after a user selectable manual trigger time
(default = 10 sec), and the #****.wav file be written to memory card.
In
automatic recording
the signal from the microphone is constantly monitored and the recording started
automatically, when a triggering event is registered (detected ultrasound signal). The duration of such recordings
depends on the presence of the triggering criteria. The default setting allow for a recording duration which includes
0.5 seconds before the first and 1 second after the last trigger event (pre- and post-trigger). With the default
settings, the shortest recording duration is therefore 1.5 seconds, which corresponds to roughly 1 MB of data on
the SD card.
2.5 Check and play of recorded #****.wav files
For immediate control, single stored audio files can be replayed through headphones in time expansion mode.
Ultrasound signals are slowed down by a user selectable factor x (default x = 10). A stored sequence therefore
requires an x-fold playback time of the original recording to monitor. Only recorded files can be played back and
listened to. Additionally recording details of a file such as date, time, length, peak frequency and more can be
displayed.
Single recordings on the memory card can also be erased through this mode. Erasing the complete memory card
must be achieved by formatting it (Settings menu).
2.6 Global positioning and time recording / GPS
The BATLOGGER is equipped with a GPS receiver. Its positioning and time data are stored in parallel to the
#****.wav file in a corresponding #****.xml file, and into a Google-Earth -.kml file. Further on, the travelled track can
be recorded to a GPX file.
2.7 Recording the mode of operation of the BATLOGGER
For later control of a BATLOGGER's state, its mode of operation is sequentially written to memory card into a
separate "log"-File (BATREC.log). This ”BATREC.log” file is constantly added to, and will not be overwritten.
However, formatting the SD card will also erase this log file.
BATLOGGER Manual
Elekon AG Nov. 2012
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