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SM3BAT Setup
3.16
SM3BAT User Guide
How to Connect the GPS Time-Synch Option
Use the optional GPS time-synch receiver to calculate the location of wildlife signals from multiple SM3BAT units and multiple recordings. The optional GPS time-synch receiver synchronizes the SM3BAT clock to the GPS time base for extremely accurate time stamping on all your recordings. It also logs the path and location of recordings. The GPS coordinates are logged in a file on the SD card and in metadata inside each recording file.
NOTE: The GPS receiver does not synchronize recordings when using recording triggers. You must record continuously to maintain synchronization.
Crystal oscillators used in clocks and electronics, including the SM3, have frequencies that vary over time. The SM3BAT clock uses a temperaturecompensated crystal with very low drift (< 3.5 ppm); however, clock drift of several milliseconds per hour can still occur.
The SM3BAT GPS receiver can synchronize your recordings across multiple recorders to within one millisecond. Arrange multiple time-synchronized recorders to triangulate a source location by measuring the relative time-ofarrival of sound waves as they travel.
NOTE: The GPS Time Synch Option provides synchronized recordings, but additional third-party tools are needed to determine the time of arrival of a particular signal to each microphone and calculate the position of the source.
1.
Order an SM3BAT with this option or place a new order for the GPS timesynch receiver for SM3.
2.
The Location in the Location Settings will be automatically set by the GPS.
NOTE: Although the navigation steps are the same, the values are now read-only. You cannot change them. This change in location may affect the calculated sunrise and sunset times when using advanced scheduling commands.
3.
Time Zone should be set as described on page 19.
4.
Unpack the optional GPS time-synch receiver and the 5 meter cable that is included with it.
5.
Remove the cap over the serial communication connector, the third connector from the top in the series of four ports in the connector module.
Refer to Table 1: Song Meter SM3BAT Product Diagram.
6.
Attach, rotate, and secure the cable to the serial communication connector to make a weatherproof seal.
7.
Position the receiver where a reliable GPS signal can be received.
NOTE: It can be difficult to acquire a GPS signal in thick vegetation. page
24
BIOACOUSTIC MONITORING SYSTEMS
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