3.1.3
RECEIVER:
Sensitivity:
0.25uV (-120dBm) for 12dB SINAD de-emphasised
0.355uV (-117dBm) for 12dB SINAD flat
Bandwidth:
New and old MPT1411 band without re-alignment
Nominal pre-aligned bandwidth 12MHz.
Spurious Response:
> 80dB
Blocking:
> 90dB relative to 1uV
Intermodulation:
> 70dB
Adjacent Channel:
> 65dB at 12.5KHz
IF Frequencies:
45MHz and 455KHz
Spurious Emissions:
< EN 300 113
Analogue Mode:
Programmable audio output levels in the range +3dBm to -30dBm into
600ohm, selectable for de-emphasised or flat response. Programmable mute
enable.
Mute Response Time:
< 3msec
3.1.4
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
NRZI:
On or Off
Stop bits:
Programmable 1 or 2
Data Bits:
Programmable 7 or 8
Signalling Formats:
Programmable V23, Bell202, up to 1200 baud, 2400 baud FFSK, 4800 baud
GMSK, 9600 baud 4 level FSK.
Synchronous/Async.
Programmable either up to 1200bps, above 1200bps synchronous
Over-air Baud Rate:
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 –115dBm (FEC on)
9600 baud,
less than 1 x 10-3 at –112dBm (FEC off)
The bit error rates quoted above are for fixed messages representing typical
data sent over the link. The BER should not be directly compared with other
manufactures figures unless the data format is known, as many
manufacturers quote a BER based on a simple alternating data pattern,
which will generally give much better BER results.
F.E.C.
Forward Error Correction programmable on or off at 9600bps.
URT500 Manual
Page 9 of 42
Rev. C – 6 August 2008