11
11
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
like vibration or audible beeping warning sound during alert mode. Its features and functions
are described in the separate attached sheet.
The transmission is powered by a 1.5v AAA-sized battery and works on 433.92Mhz single fixed
frequency. Details of circuit diagram and its block diagram are shown on the attached sheets.
There are total 5 buttons which, if pressed, will produce the digital control signals and
modulate the carrier signal. The carrier signal is generated by a crystal oscillator/amplifier
circuit composed of a 433.92 MHz crystal and a npn transmitter. The modulated output of the
RF amplifier stage is coupled to the coil.
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.
Fundamental Frequency
433.92MHz
Power Source
1.5v
Transmitting Time
Periodic
≤
5 seconds
Associated Transceiver
FCC ID : NJQTR53A
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference: and
(2) This device must accept any interference received: including interference that may cause undesired
operation.
Note: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to
this equipment. Such modification could void the user
’
s authority to operate the equipment.
