We have developed
a highly sophisticated receiver able to cover from 138 - 174 MHz. Despite it's
compactness, it has all the advantages of storing and scanning frequencies and
is more waterproof than any other receiver designed for radio-tracking.
Currently we have a high demand from satisfied customers. Therefore please
contact us (info@biotrack.co.uk) to get you a lead
time.
Sika Specifications
Frequency band
within 138.000 to 173.999 MHz
4 MHz, 8 MHz or 30 MHz
bands available
Sensitivity
-150 dBm (min. discernible signal)
Battery Life
24 hours (rechargeable battery)
Size of box
150 x 85 x 55 mm
Weight
800 g (1.8 lb)
Sika Functions
Programmable memory (256 channels)
Scanning (1 - 999 seconds)
RS232 control
Analogue and digital gain
Signal strength indication by bar graph and numerical
readout
The DataSika is a practical and user-friendly datalogger, designed for autonomous data collection of presence/absence, migration through an area or the logging of activity/temperature. The DataSika has an extremely tough, waterproof housing to withstand long-term deployment in adverse conditions. Up to 20 traditional tags on different frequencies can be monitored sequentially, or over 200 coded tags on the same frequency can be monitored simultaneously; increasing sample size and reducing the chance of missing an event. Please contact one of our biologists (info@biotrack.co.uk) to discuss which version would best meet the needs of your project.
DataSika Specifications
Frequency band
4 MHz (148-152 or 170-174 MHz)
Audio Sensitivity
-150 dBm (min. discernible signal)
Logging Sensitivity
-135 dBm (min. discernible signal)
Logging tolerance
Peak over 4 kHz
Battery Life
External Battery Required
Operating Current
< 160 ma @ 12V
Size of box
270 x 250 x 130 mm
Weight
1.4 K g (3.1 lb) - no battery
Memory
4 Mb
Dynamic Gain Control
90 dB
DataSika Functions
Programmed from PC/Laptop (RS232 & USB)
20 frequencies or >200 coded tags on same frequency
Records signal strength and pulse characteristics (for sensors)
Coded technology reduces the chance of missing an event when logging, because the logger does not have to scan through separate frequencies.
Yagi Antenna
Biotrack supplies two models of
Yagi antenna. Both antennas give excellent performance, and are light-weight
and robust. One Yagi has conventional rigid elements, and the other has
flexible elements that fold on impact and automatically spring back into
position afterwards. In common with most good Yagi designs, these antennas are
'matched' to the standard 50 ohms input impedance of radio-tracking receivers.
However, the matching is achieved by 'inductive coupling' via internal windings
that are sealed within the central element. This avoids the need for a more
cumbersome external device such as a gamma-match.
This pdf document explains
the principles of radio-tracking, how to improve performance and gives easy
exercises for those who are new to the technique.
RANGES software allows easy analysis
of locations, whether animals, humans or plants. If you need to determine
animal home ranges, analyse dispersal, decide which habitat is most often used
or how animals arrange themselves socially, RANGES is an invaluable tool.
