Technical Description

FCC ID: NMTBTHR918-01

Operational Description

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FCCID_49585

iDT TDT Technology Limited K K & 8# R A a Technical descriptions of BTHRS18 BTHRG18 is the Remote Baro Thermo Hygro sensor unit of the. Remote Weather Station system. It consists of two parts, one part is the controller part and the other part is the transmiter part, The controller part provides the feature of weather forecast (by sensing the pressure change trend). Pressure sensor being used is P1 (SPX5049A) and analog signal is converted into digital signal then input to Micro— contraller U1. Temperature and Humitity are measured by sensing the thermistor H2 and humidity sensor H.. The fransmitter part is basically a Colipitis oscillator, where ©4, CS and X1 are used to determinate the resonant frequency that is 438.92MHz. There is a LC filtering circuitry, used to suppress harmonics of the ascillator. An inductor, L3, is employed to match the impedance of the antenna. aif Kais: Eaut,a1 ManYae ieHuogham, Kovoon Herg Kore Tel2ree 7ora Fecares cezo case ioimirion® esarsmcormicin


Document Created: 1999-07-23 13:58:07
Document Modified: 1999-07-23 13:58:07
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