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458MHZ RF TRANSMITTER & RECEIVER
FEATURES
* Miniature Crystal Module * 500mw RF Output Power * Very High Frequency Stability * Up To 20km Range (Direct Line Of Sight) * 1-3km Range (Within Buildings) * 15 Single Channel Versions Available * Wide Tx Voltage Range 6.5 - 9v Dc * Rx - Single Supply Voltage 5vdc * Low Power Consumption * Fast Response Time * Standard TTL/CMOS Interface * Mpt1329 Licence Exempt
TX/RX6000
DESCRIPTION The R.F. Solutions 458MHz FM Transmitter and receivers are compact `credit card' sized crystal controlled modules, capable of transmitting data up to 20 kilometres in direct line of sight, up to 1-3km within buildings. These modules are crystal controlled for frequency accuracy and are supplied tuned to one of 15 available channel frequencies. The units are suitable for general purpose telemetry applications where small size and high data rates are needed. The module can transmit digital or analogue (GMSK, or FSK) data at up to 9600baud rate. Supplied as a completed module, no modification or pre tuning is necessary. Connections are by gold plated pins on the module base, enabling the module to be socketed for interchangeability (e.g. for other frequency channels). The radios have been designed to meet ETSI300-220, EN50081-1, EN50082-1 EMC directive and are DTI approved under MPT1329 for licence free use.
TYPICAL OPERATION
Host Data Source
TX6000
RX6000
Host Data Source
DS006-2
Oct 02
2003 REG No 277 4001, ENGLAND.
Page 1
458MHZ RF TRANSMITTER & RECEIVER
TX/RX6000
Frequency of Operation The TX/RX6000 modules operate on the 458.500MHz to 458.950MHz telemetry band. There are 15 channels within this band. The TX/RX6000 modules are supplied at one of these specific channel frequency bands. When ordering the modules, the exact frequency must be stated. Ch No (Hex) Frequency (MHz) 02 458.525 04 458.550 06 458.575 08 458.600 0A 458.625 0C 458.650 0E 458.675 10 458.700 12 458.725 14 458.750 16 458.775 18 458.800 1C 458.850 1E 458.875 20 458.900 22 458.925 Radio Propagation With any radio system, there are a number of factors affecting the system performance. These are * Transmitter power output * Height of transmitter and receiver antenna * Length of feeder cables to the antenna * Type and efficiency of antenna * Surrounding topography * The weather Antennas The types of antenna we recommend for this Modem are; Helical : The smallest, most compact antenna, has a gain of <1, designed for short ranges up to 2km 1/4 Wave Flexi : General purpose antenna with gain <1 gives slightly better range than Helical Yagi : A highly directional antenna (Looks similar to a standard TV aerial). Typically has a gain of +3dB. The output power of a transmitter connected to a Yagi must be reduced in order to comply to the DTI specifications. This does however have the advantage of reducing the power consumed by the transmitter to achieve the same range. By connecting a Yagi to a receiver, the system range may be extended to 20km. Note : Try to keep the feed wire to the antenna as short as possible, If the antenna is to be mounted some distance away low loss 50 co-axial cable should be used as the interconnection. Power Supply It is not advisable to use a switched mode power supply, either to drive the TX6000/RX600 module or within close proximity to it. Switched mode power supplies can produce high energy radio frequencies over a broad spectrum potentially causing interference with the operation of the Modem.
DS006-2
Oct 02
2003 REG No 277 4001, ENGLAND.
Page 2
458MHZ RF TRANSMITTER & RECEIVER
Transmitter Connections : Pins on underside of Module Pin 1 2 3 4 5 6 7 8 9 10 11 12 Description Ground Modulation Input 500mVpk-pk +ve freq deviation Modulation Input 500mVpk-pk -ve freq deviation Digital Data input (TTL) Switched +5V (supply to Rx when used as transceiver) Test Regulated +5V Transmitter ON (Connect to Common to start the Transmitter) Supply Voltage to Module (7.2 - 9V) Receiver RF Output (for use in transceiver) Ground Antenna
TX/RX6000
Direction Input Input Input Input Output Output Output Input Input Output Input Output
Receiver Connections : Pins on underside of Module Pin 1 2 3 4 5 6 7 11 12 Description Ground Receiver Signal Strength Indicator (RSSI) 0-2V Log Range Demodulated Output Test (unfiltered modulated output) +5V supply to Local Oscillator and RF Amplifier Digital Data Ouptut +5V supply to IF and LF Amplifiers Ground Antenna Direction Input Output Output Output Input Output Input Input Antenna
Power Save Mode The receiver may be put into power save mode by removing the 5V supply to pin 5. The RSSI will still indicate a valid signal. After re-applying power to pin5 the data output will be valid within <5msecs.
50.8
12.5mm
12 11 10
4.0 15.0
Top View (pins on underside)
2.5 2 NOTES Pins on a 2.54mm pitch Pins are 2.6 x DIA0.51mm in Gold Plate Pins 8, 9, 10, 11 are on the transmitter only
9 8 7 6 5 4 3 2 1
25.4
36
2.8
4.0 All Dimensions in mm
Mechanical Details
DS006-2
Oct 02
2003 REG No 277 4001, ENGLAND.
Page 3
458MHZ RF TRANSMITTER & RECEIVER
Circuit Connections
TX/RX6000
12 11 10
12
0V 1K +7V TX on Digital Data In
0V
9 8 7 6 5 4 3 2 1
+5V Digital Data Out
7 6 5 4 3 2 1
RSSI 0V
Transmitter Connections Transceiver Application Connections
Receiver Connections
12 11 10
N o te This link to be exactly 100mm of Coaxial Cable
9 8 7 6 5 4 3 2 1
+7V Supply Voltage Transmitter On Digital Data In
Transmitter Connections
Digital Data Out RSSI 0V
12
9 8 7 6 5 4 3 2 1
Receiver Connections
W hen a transceiver is configured, the receiver module is placed into power save mode automatically when the transmitter is powered on.
DS006-2
Oct 02
2003 REG No 277 4001, ENGLAND.
Page 4
458MHZ RF TRANSMITTER & RECEIVER
ABSOLUTE MAXIMUM RATINGS
Storage Temperature..........................................................-30 to +85o Celsius. Operating Temperature....................................................... -25 to +55o Celsius.
TX/RX6000
DIMENSIONS
Length = 36, Width = 51, Height = 12.5mm Weight = 30grams
TECHNICAL SPECIFICATION
Ambient temperature = 25 Celsius.
o
ELECTRICAL CHARACTERISTICS Transmission Frequency Channels Modulation TRANSMITTER Supply Voltage Supply Current Radiated Power Start up Time Data Input (Logic Low) Data Input (Logic High) RECEIVER Supply Voltage Supply Current Power Save Supply Current Sensitivity Modulation Output Data Ouput (Logic Low) Data Ouput (Logic High)
MIN
TYPICAL 458.850 1
MAX
DIMENSION MHz
NOTE
See Note 2
7 150
170
0 3.5 4.7
0.2 3.8 5 15 500
9 200 500 5 0.8 5 5.3
V mA mW mSecs V V V mA A dBm Vpk-pk V V
Transmitting
TTL TTL
-122 0 3.5 0.2 3.8 5 0.8 5
TTL TTL
Notes: 1. There are 15 channels in 5MHz sub-bands. The module is supplied at one fixed frequency. 2. Modulation used is F3D PART No TX6000-XXX RX6000-XXX DESCRIPTION Transmitter 458MHz XXX = Frequency Channel Receiver 458MHz XXX = Frequency Channel
For more information or general enquiries, please call; R. F. Solutions Ltd., Unit 3, Cliffe Industrial Estate, South Street, Lewes, E Sussex, BN8 6JL. England. Tel +44 (0)1273 898 000. Fax +44 (0)1273 480 661. Email sales@rfsolutions.co.uk Web Page http://www.rfsolutions.co.uk RF Solutions is a member of the Low Power Radio Association.
Data appears courtesy of Warwick Industrial Electronics Ltd
Information contained in this document is believed to be accurate , however no representation or warranty is given and no liability is assumed by R.F. Solutions Ltd. with respect to the accuracy of such information. Use of R.F.Solutions as critical components in life support systems is not authorised except with express written approval from R.F.Solutions Ltd.
DS006-2
Oct 02
2003 REG No 277 4001, ENGLAND.
Page 5

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