Commercial In Confidence
18
2.1.3
RECEIVER:
Sensitivity:
Better than 0.25
µ
V (-120dBm) for 12dB
SINAD (de-emphasised response)
Spurious Response:
>80dB
Blocking:
>90dB relative to 1
µ
V
Intermodulation:
>70dB with 9600bps data
Adjacent Channel:
>65dB at 12.5KHz
IF Frequencies:
VHF & UHF 45MHz and 455KHz
900MHz 70MHz and 455KHz
Spurious Emissions:
<2nW
External Audio Output:
+3dBm to -20dBm into 600 ohms with
Programmable De-emphasised or Flat
response and mute enable.
Mute Response Time:
<3msec
Received Signal Strength
(RSSI): Range -120dBm to -40dBm
2.1.4
INTERNAL MODEM
Serial Comms:
Asynchronous or Synchronous with custom software.
Baud rate programmable between 150bps and 38400bps
Interface:
Selectable RS232 or 5V TTL plus inverted/non-inverted,
Parity:
Programmable odd, Even or None
Stop bits:
Programmable 1 or 2
Data Bits:
Programmable 7 or 8
Synchronous/Async. Programmable either up to 1200bps, above 1200bps synchronous
Signalling Formats:
Programmable V23, Bell202, up to 1200 baud, 2400 baud FFSK,
4800 baud GMSK, 9600 baud 4 level FSK.
Baud date:
150 – 9600bps within 12.5KHz
Bit Error Rate:
150 - 2400 baud, less than 1 x 10-3 at –120dBm
4800 baud, less than 1 x 10-3 at –117dBm
9600 baud, less than 1 x 10-3 at –112dBm
2.1.5
BIT ERROR RATE BER
The Bit error rate quoted in the specification is for fixed messages with no Forward Error Correction
(FEC) and represents that which will be obtained from typical data sent over the link. The BER should
not be compared with other manufactures figures unless the data format is known, as many
