User's Manual

7
7
The 2-way pager is a low-powered transmitter device used in monitoring the automobile security
status as well as in remotely arming/disarming car security system and other optional features.
Its features and functions are described in the separate attached sheet.
The transmission is powered by 12 V of the car alarm control mudle and works on 433.92 Mhz
single fixed frequency. Details of circuit diagram and its block diagram are shown on the
attached sheets.
The automobiles sensor will trigger the digital control signals and modulate the carrier
signal. The carrier signal is generated by a crystal oscillator/amplifier circuit of a 433.92
MHz crystal and a npn transmitter. The modulated output of the RF amplifier is coupled to the
coil.
Fundamental Frequency
433.92MHz
Power Source
12V
Transmitting Time
Periodic 5 seconds
Associated Transceiver
FCC ID : NJQTR68A
All the tuning and verification are done by manufacturer during the production process and
no adjustment is allowed by any consumer. No external ground is needed in such device.