00NB912 WLS912-433, PWLS912-433, WLS912L-433 & PWLS912L-43 Operational Description Circuit description Digital Security Controls .

Digital Security Controls . WLS912-433, PWLS912-433, WLS912L-433 & PWLS912L-43

Page 1 of 00NB912 WLS912-433, PWLS912-433, WLS912L-433 & PWLS912L-43 Operational Description Circuit description Digital Security Controls .

CIRCUIT DESCRIPTION
Device: WLS912L-433 Lithium Glass Break Detector
Model: WLS912L (UA261)
ESI Identifier:
Description:
The lithium Glass Break Detector sends the sensor status appropriately to the control unit
of the wireless security system. A sensor is incorporated to sense the frequency of a
broken glass.
This unit consists of Three main circuit sections. A control section with a microprocessor,
a digital controls sensor section and the RF transmitter.
The control section receives status information from the sensor inputs triggered by
detecting the frequency pitch when a glass is brake and distinguishing its direction. The
information is then coded to produce ASK modulation signal. This section also controls
transmitter activity.
The transmitter consist of an integrated chip fully implemented with a phase locked loop
(PLL) ,divide-by-64 prescaler, a phase detector, a voltage controlled oscillator, and an
automatic lock detect that disables the transmitter output when the PLL is out of lock.
The external reference crystal frequency provide a complete phase-locked detector
which when divide-by-64 produce the output signal frequency of 433.92MHz
compensated with a matching network to antenna.
Download: 00NB912 WLS912-433, PWLS912-433, WLS912L-433 & PWLS912L-43 Operational Description Circuit description Digital Security Controls .
Mirror Download [FCC.gov]00NB912 WLS912-433, PWLS912-433, WLS912L-433 & PWLS912L-43 Operational Description Circuit description Digital Security Controls .
Document ID130184
Application IDsz093TMdL6DWnUtJf2glQg==
Document DescriptionCircuit description
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeOperational Description
Display FormatMicrosoft Word - pdf
Filesize2.62kB (32769 bits)
Date Submitted2000-12-22 00:00:00
Date Available2001-02-08 00:00:00
Creation Date2000-12-22 10:11:00
Producing SoftwareAcrobat Distiller 4.0 for Windows
Document Lastmod2000-12-22 10:11:02
Document TitleCircuit description

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Create Date                     : 2000:12:22 10:11:00
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