Product Design and Development

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For purposes of clarity the photograph shows a partially screened unit, actual unit is fully screened.

General

Frequency Range_________458.500 - 458.950 MHz ( Approved for band extension)
Channels________________Synthesised 25KHz channel spacing resulting in 15 Channels
________________________Optional 12.5KHz variant resulting in 32 channels
Switching & Settling Time__ <20mS
Channel Selection________ Default at power up using DIL switch.
________________________Simple sequential stepping uning two digital lines
________________________Absolute change using serial comms
Frequency Stability_______Within +/- 1.5KHz over temp range -10 to +60 Centigrade
Modulation______________Tamed direct FM
Modulation Inputs________ 0-5V Digital , 100K impedance, 2.5V threshold
_______________________Analogue, 5K impedance 1V Pk-Pk, AC coupled
Out of lock indicator______Digital output line low when synthesiser not in lock
Spare Digital line________1 uncommitted line to on-board micro-controller
Serial Comms link________2 wire, half duplex 9600 asynchronous port,ability to configure the frequency and
_______________________mode and also transmit and receive data
Supply Voltage__________9V - 13 Volts DC
Receive Current_________<70mA
Transmit Current_________<300mA
Standby Current_________<5mA
Conformance___________MPT 1329 and ETSI300-220

Interface details

Signal Connector________13*2 2mm pich header to mate with PCB or wiring harness
RF Connector__________ MCX Socket

Size__________________93mm*60mm*17mm

Transmitter

RF Power out (Hi)_______500mW +0dB -1.5dB
RF Power out (Lo)_______5mW +/- 3dB
Modulation rate_________9600 Baud max (4800 Baud Max)
Deviation______________+/- 3KHz (+/- 1.5KHz)

Receiver

Type__________________Dual Conversion superhet, IF's at 45MHz and 455 KHz
Sensitivity______________Typically 0.3uV for 10dB SINAD
Bandwidth______________+/- 7.5 KHz (+/- 3.75KHZ)
RSSI out________________Logarithmic output, range 60dB : 0-2.5 Volts
Carrier Detect Out_______+5V when signalpre-defined level, 0V otherwise

• Specifications in italics correspond to 12,5 KHz model

Full technical manual available- please contact us for further details

A&R Electronic Developments Ltd
Unit A1, Trent Business Park
Power Station Road
Rugeley
Staffordshire
WS15 2WB
England

Tel ++ 44 1889 574980
Fax ++ 44 1889 574975
Email: asol@arelectronics.co.uk

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