RADIO SS450
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The SS-450 remote transceiver is a high quality, full featured, half duplex radio transceiver, designed specifically for narrow band data transmission applications which employ filtered base band or audio sub carrier data modulation.
These radio transmitters are fantastic for transmission of data over long distances, for example we have used these to transmit start time of days from the start to the finish of motor rally stages that were many, many kilometers apart. As these radios are transmit and receive units, so they can also be used as relay stations so the transmission distance can be virtually unlimited.
Features -
- Low power consumption - reducing power supply costs.
- Excellent specification and performance figures.
- Digital temperature compensation, low ageing quartz reference for long term stability.
- Internal 13.8V D.C. 7 Amp hour gel cell supply.
- Over Voltage transorb protection.
- Wide temperature range -10 to 60C.
- Over temperature transmitter power fold back.
- Digital modulation capability - true digital radio capable of higher data rates (4800/9600) - more efficient use of radio spectrum.
- The use of Microwave Stripline Technology to minimise components and in turn the likelihood of failures.
- Excellent electrical noise immunity - minimal if any effects from external equipment.
- Fast Tx/Rx switching - offering greater efficiency and in turn greater remote populations from a single base.
All connections extend from a single 15 way Din connector for simple connection.
PRODUCT Specifications
| Radio Frequency Band | 472 Mhz |
| Tx/Rx Frequency Spacing | Various frequency splits - 12.5Hz |
| Nominal Operating Voltage | Equipment operates at 13.8V (6.25 to 16V) |
| Maximum Current Drain 12V: Receiving | 70 mA |
| Maximum Current Drain 12V: Transmitting | 650 mA |
| Antenna Port Impedance | 50 Ohms (nominal) |
| Antenna Connector (type) | BNC Female (Optional TNC or SMA) |
| Operating Temperature | -10 to 60C (Optional -30 to 70C) |
| Humidity Range (operating) | 0 -95% non condensing |
| Tx/Rx Turnaround Time | 30mSec |
| Channel Spacing | Synthesised : 12.5 and 25KHz (6.25KHz Raster) |
TRANSMITTER
| Transmit Frequency Range | 472 Mhz |
| RF Output Power | 0 to 5 Watts |
| Frequency Stability | +/- 1ppm (-10 to 60C) : Optional (-30 to 70C) |
| Modulation Response | Direct FM DC to 25KHz |
| Time Out Timer | Disabled OR programmable from 1 to 60 seconds |
| Keying Time to 90% Full Power | < 1msec |
RECEIVER
| 12 dB SINAD sensitivity | -118dBm |
| Audio Distortion | < 5% THD |
| Frequency Stability | +/- 1ppm (-10 to 60C) : Optional (-30 to 70C) |
| Receiver Frequency Range | 472MHz - Various Models Available |
| AFC (internal) | ±5kHz tracking @ -90dBm/attack time <10Ms |
| Response | DC to -6dB @ 5KHz |
| Distortion | < 5% THD |
| Selectivity and Desensitisation | 65dB EIA |
| Blocking | 90dB EIA |
| Spurious response | 70dB EIA |
| Intermodulation Rejection | 70dB EIA |
| Mute setting (min. to max.) | Fully Open to -60dBm |
CONTROLS AND TELEMETRY
| Tx enable input | TTL active low (0.1mA) |
| RSSI output | Rx AFC error volt 2.0KHz/V ref 2V DC via 1K |
| Rx CD (RSSI) out | TTL active low (program -120 to -70dBm) |
| Tx Power sense Output | Analogue DC square law (Po(Watt)=0.02*(7*(Vsens+0.15))2 -in 10) |
| Temp Sense Output | Analogue DC voltage proportional to Absolute temp (calculate T0 (Kelviin) =Vsens*100 in 100k load) |
