User's Manual

Lotek Biotracker Receiver User’s Manual Page 9
Liquid Crystal Display (LCD)
The LCD has two rows with 16 character places per row. The diagrams below show the
position of information displayed in different modes.
LCD Functions in Frequency Mode or Channel Mode
LCD Functions in Scanning Mode
Signal Strength Display
The Lotek Biotracker Receiver displays signal strength in two ways: using a bar graph
and a number. Both indicators are displayed on the top line of the LCD. The system
responds to pulses over 10 ms long and above a threshold, so under normal
circumstances noise is ignored. The display is held for 1 second after triggering
(otherwise pulses would be too short to see). If the display is constantly being triggered
by noise, the pulses are likely to be missed.
The display can be changed by adjusting the gain. If there is too much noise and it is
triggering the display, turn the gain down. Similarly, reduce gain if the signal is causing
the bar graph to swing full scale (and the number displayed is 99).
Battery State Indicator
The empty battery symbol in the top right of the LCD indicates when the battery needs to
be recharged. When the battery is OK this symbol is NOT shown; it only appears when
the battery has about 10% of its capacity remaining. There is no ‘full battery’ symbol.
Selection of
channels for
scanning
Channel to
be scanned
All
channels
Selected
channels
Channel
not selected
Frequency in MHz
0.1 kHz
resolution
In Channel Mode
only. 001 to 256
Signal Strength
Bar Chart
1 kHz
resolution
Gain
(01 to 99)
Signal Strength
Battery Low
Relative scale
(01 to 99)
Mode
Channel
Number
Channel
Mode
Scanning
Mode
Frequency
Mode