DTC Communications Inc. LB1 User Manual
DTC Communications, Inc.
Page 7 of 7
Delay until activation
A useful parameter in mission planning is the “Delay until activation” parameter. This allows further
conservation of the batteries by suppressing transmitter operation for a period of time. Pressing the button
resets the delay timer to the programmed value. A delay value of 0 – 96 hours is programmable (+/- 5%).
Activation schedule
A useful parameter in mission planning is the “Delay until activation” parameter. This allows further
conservation of the batteries by suppressing transmitter operation for a period of time. Pressing the button
resets the delay timer to the programmed value. A delay value of 0 – 96 hours is programmable (+/- 5%).
Activation schedule
The beacon may also operate according to a set ON/OFF schedule. For example, the beacon may be
programmed to operate for 16 hours on and 8 hours off to conserve battery power, and conform to mission
requirements. The ON and OFF times may be programmed from 0-96 hours (+/- 5%).
Parameters in NOVRAM
All of the parameters programmed into the beacon are retained in non-volatile memory, regardless of the
state of the batteries. The parameters can only be changed by re-programming the beacon with the cradle
and DOS software, or by pressing and holding the button for five seconds or more.
When the button is pressed for five seconds, the LED will blink five times indicating the reset to default
values. Upon releasing the button, the LED will blink once and the beacon will begin operating with the
default values.
RF Power
The RF Power output of the beacon is 30 mW typical (50 mW maximum), until low battery indication.
Frequency
The beacon operates on a single, crystal-controlled frequency in the 150-174 MHz band. It is not
programmable.
Modulation
All tones transmitted by the beacon are +/- 2.75 kHz deviation, FM.
programmed to operate for 16 hours on and 8 hours off to conserve battery power, and conform to mission
requirements. The ON and OFF times may be programmed from 0-96 hours (+/- 5%).
Parameters in NOVRAM
All of the parameters programmed into the beacon are retained in non-volatile memory, regardless of the
state of the batteries. The parameters can only be changed by re-programming the beacon with the cradle
and DOS software, or by pressing and holding the button for five seconds or more.
When the button is pressed for five seconds, the LED will blink five times indicating the reset to default
values. Upon releasing the button, the LED will blink once and the beacon will begin operating with the
default values.
RF Power
The RF Power output of the beacon is 30 mW typical (50 mW maximum), until low battery indication.
Frequency
The beacon operates on a single, crystal-controlled frequency in the 150-174 MHz band. It is not
programmable.
Modulation
All tones transmitted by the beacon are +/- 2.75 kHz deviation, FM.