SR500 Radio

Reseptor SR500
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  SR500 RECEIVEROPERATING INSTRUCTIONS .These operating instructions are intended to provide the user with sufficient information toinstall and operate the unit correctly. The Wood and Douglas SR500 UHF synthesized receiver is intended to fulfil the numerousOEM applications by virtue of its highly flexible synthesized design approach, miniaturesize and cost-effective performance. The unit complies with MPT1329 and as such doesnot require an operating licence in the UK. It is also approved to various ECspecifications. INSTALLATION NOTES:Pin spacing on all connectors is 2.54mm (0.1 ) All dimensions in millimetres  CONNECTION Connection to the SR500 receiver is via PL1, PL2 and PL3 which plug directly into theuser's own equipment. The location of these connectors is shown in Figure 1 and detailedin the following tables. PINNAMEFUNCTIONREMARKS 10V0 voltscommon ground2RF I/PRF input50 ohms input30V0 voltscommon groundConnector PL1 pin detail PINNAMEFUNCTIONREMARKS 1+VINpositive supply+6.0V to +15.0V20V0 voltscommon groundConnector PL2 pin detail  PINNAMEFUNCTIONREMARKS 1RSSIS meter output0.5 - 2V signal strength indicator, 60dB range2SQFSquelch flagopen collector output, ON (low) = no signal3AUDIOAF output250mV p-p ±20% into 10k S Note: The output audio is inverted with respect tothe ST500 (or similar Wood & Douglas product)audio input. 4DATAData outputopen collector, no pull-up Note: The data output is inverted with respect tothe ST500 (or similar Wood & Douglas product)data input.5+5V+5 volt supply output50mA maximum current drain60V0 voltscommon ground7RS232I/Pserial programminginputRS232 programming input Note: inverted TTL level data can also be used. If not used, leave not connected, or connect to 0/V8RB1parallel frequencyselect internal pull-up to +5V, active low9RB210RB3Connector PL3 pin detail  Figure 2 Programming adaptor  FREQUENCY PROGRAMMING The SR500 has an internal memory which can store up to 128 RF channels (16 randomlyprogrammed and 112 sequentially programmed). The frequency and set-up informationis programmed into the unit by a synchronous PCM interface protocol.The software supplied with the SR500 receiver is the STSRn00.exe program. The softwarecan be run on a PC with the serial port connected to PL3 of the SR500 receiver via asuitable adaptor as shown in Figure 2. For the read-back function PL3 pin 10 of thereceiver must be connected to pin 2 of the PC serial port via a buffer circuit. A 1k pull-upresistor to +5V must also be provided as shown.


Jul 23, 2017

Bahay Na Bato

Jul 23, 2017
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