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FM-RX1-xxxF Dataheets PDF



Part Number FM-RX1-xxxF
Manufacturers RF Solutions
Logo RF Solutions
Description (FM-RX1-xxxx) Receiver Module FM
Datasheet FM-RX1-xxxF DatasheetFM-RX1-xxxF Datasheet (PDF)

www.DataSheet4U.com FM R. F. RECEIVER M ODULES. FEATURES FMRX1- XXXX • • • • • • • • • • • SELECTIVE DOUBLE CONVERSION SUPERHET. LOW POWER ⇒ 13mA CONTINUOUS, ⇒ 130uA POWER SAVE MODE. FAST ENABLE TIME; ⇒ ‘A’ VERSION <3mS. ⇒ ‘F’ VERSION <1mS. WIDE SUPPLY VOLTAGE, 4.5 - 9 VOLTS. ANALOGUE & DIGITAL OUTPUT. HIGH DATA RATES (up to 5Kbps). CARRIER DETECT OUTPUT. AVAILABLE AS EITHER 418 OR 433MHz. APPLICATIONS REMOTE SWITCHING SYSTEMS REMOTE DATA COMMS PAGERS • • • ALARM SYSTEMS GARAGE DOOR OPENE.

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www.DataSheet4U.com FM R. F. RECEIVER M ODULES. FEATURES FMRX1- XXXX • • • • • • • • • • • SELECTIVE DOUBLE CONVERSION SUPERHET. LOW POWER ⇒ 13mA CONTINUOUS, ⇒ 130uA POWER SAVE MODE. FAST ENABLE TIME; ⇒ ‘A’ VERSION <3mS. ⇒ ‘F’ VERSION <1mS. WIDE SUPPLY VOLTAGE, 4.5 - 9 VOLTS. ANALOGUE & DIGITAL OUTPUT. HIGH DATA RATES (up to 5Kbps). CARRIER DETECT OUTPUT. AVAILABLE AS EITHER 418 OR 433MHz. APPLICATIONS REMOTE SWITCHING SYSTEMS REMOTE DATA COMMS PAGERS • • • ALARM SYSTEMS GARAGE DOOR OPENERS REMOTE TELEMETRY GENERAL DESCRIPTION The R.F. Solutions FMRX1 - XXX range of Radiometrix Receivers are compact board SIL Modules which can be used to capture R.F. data from an FM transmitter such as the RFS FMTX-1 (see RF Solutions FM Transmitter Module data sheet FMTX1-XxXX). When used as a remote control system, up to 200 metres range can be achieved. The Receiver may also be supplied as a bare board or as a custom solution unique to customer specific requirements. Please contact R.F. Solutions for further information. BLOCK DIAGRAM SAW 1s t LO 433.92MHz 2nd LO 16MHz 5 Vc c 3 DETECT R.F. IN 1 418MHz BPF PRE A MP 1s t MIXER 2nd MIX IF AMP DEMOD 3rd ORDER 5k hz LPF BUFFER AF 6 ACTIVE DATA SLICER + _ DATA 7 GND 2 Rev 2.1 Jul ‘99 ©1999 REG No 277 4001, ENGLAND. 4 Page 1 0V DS000021 www.DataSheet4U.com FM R. F. RECEIVER M ODULES. PIN DESCRIPTION Pin No Name Description FMRX1- XXXX 1 2 R.F. IN R.F. GND 3 4 5 DETECT 0 VOLT Vcc 6 AF 7 DATA Connects to the Receiver antenna. Has nominal 50Ω impedance and is capacitively isolated from internal circuit. Should be connected to any ground plane against which the antenna works. (Internally connected to pin 4). May be used to derive a carrier detect to enable external circuit when a signal is being received. If the detect function is unused connect a 10k Ω resistor to Vcc (pin 5). Ground for Supply. Supply Voltage. Note; Must be a clean supply (<2mV pk-pk ac), stable and free of high frequency digital noise. A supply filter is recommended unless the module is driven from its own regulated supply. FM Demodulator output. It has a standing DC bias of approx. 2 volts and may be used to drive analogue data detectors such as modem IC’s or DTMF decoders. Can drive load impedances down to 2k Ω and up to 100pF. Digital output from the internal data slicer (true data as fed to the Transmitter’s Data input). Output is a squared version of the AF signal (pin 6). This signal is used to drive external digital decoders. Can drive load impedances down to 1k Ω and up to 1nF. FUNCTIONAL DESCRIPTION This receiver module is a double conversion FM Superhet with a data slicer driven by the AF output. Additionally, a fast acting carrier detect signal is a available to indicate to external circuits that a signal is present. This signal is extremely useful when implementing duty cycle power save circuits or to indicate to external logic that a signal is being received. It is internally derived from the degree of noise quieting due to the presence of a received carrier. The receiver is designed to work with the matching transmitter (FMTX). With the addition of simple antenna the pair may be used to transfer serial data up to 200 metres. The range of the system depends upon several factors, principally the type of antenna employed and the operating environment. The 200m quoted range is a reliable operating distance over open ground using 1/4 whip antenna at both ends of the link at 1.5 metres above ground. Smaller antenna, interference or obstacles (e.g. buildings) will reduce the reliable working range (down to 30 metres in extreme cases). Increased antenna height, slow data or a larger receive antenna will increase the range. Warning - Don’t be tempted to adjust the trimmer on the module, it controls the receive frequency and can only be correctly set-up with an accurate RF signal generator. MODULE MOUNTING CONSIDERATIONS 1. The module may be mounted vertically or bent horizontal to the motherboard. 2. No conductive items should be placed within 4mm of the module’s component side, to prevent detuning. 3. Observe RF layout practice between the module and it’s antenna, i.e <10mm unscreened track, use 50Ω microstrip or coax for >10mm. 4. It is good practice to earth plane all unused area around the module. 5. Mount as far as possible from high frequency interference sources. Microprocessors with external busses are especially incompatible with sensitive radio receivers and should be kept at least 1 metre from the receive antenna. Single chip microcontrollers are much less of a problem. 6. In some applications it is advantageous to locate the receiver and it’s antenna away from the main equipment. This avoids interference problems and allows for flexibility in the sitting of the receive antenna for optimum RF performance. DS000021 Rev 2.1 Jul ‘99 ©1999 REG No 277 4001, ENGLAND. Page 2 www.DataSheet4U.com FM R. F. RECEIVER M ODULES. DETECT OUTPUT (Pin 3) FMRX1- X.


FM-RX1-xxxA FM-RX1-xxxF FMRX1-433A


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