User's Manual

Precyse Technologies
Date: 22 May 2012 Page 8 of 10
Precyse Technologies
100 Ashford Center North
Suite 360
Atlanta, GA 30338
Enclosure: TBD
Weight: 38g (1.5 ounce)
Schematics
Will be provided on demand and under confidential agreement (not for public use)
System test configuration
SAT
The unit tested was configured with all hardware options present (Motion sensor M1 and keypad
connectors J2 and J3).
Since the unit, under its normal operation, does not transmit data periodically, for emissions
measurements, the SAT was programmed with a special test software to transmit packets
continuously at maximum output power, maximum duty cycle (20%) with power amplifier enabled.
Normal duty cycle, assuming worst case, one event per second is 0.5% (5msec transmit time per
1 second).
Theory of operation
The SAT method of communication is synchronized event based reporting, the SAT spends most
of its time in low power sleep mode. When an event happens, the SAT sends a report to the base
station. In order to avoid packet collisions and associated detection methods, the system uses a
synchronous protocol, that is, An SAT can transmit data only after receiving a synchronization
signal from the base station.