Manual

6-2

3. RECEIVER

Receiving system: Triple superheterodyne

Intermediate frequencies: 70.455MHz, 455kHz, 20.217kHz

Sensitivity (SINAD 20dB): J3E (TEL) 6.3uV or better (1.6 to 4MHz)

3.5uV or better (4 to 27.5MHz)

F1B (DSC/TLX) 1.8uV or better (1.6 to 4MHz)

1.0uV or better (4 to 27.5MHz)

Selectivity: J3E (TEL) 6dB bandwidth 2.4 to 3kHz,

66dB bandwidth Within ±2.1kHz

F1B (DSC/TLX) 6dB bandwidth 270 to 300Hz,

60dB bandwidth Within ±550Hz

Spurious response: 60dB or better

Clarifier range: ±200Hz in 1Hz steps

AF output: 5.0W max. 1W rated

Line output: 600 ohms, 0dBm (balanced)

4. DSC/NBDP TERMINAL

DSC MODEM

Communications protocol: In conformity with ITU-RM.493 and M.541

Emission: F1B/J2B 100 baud

Code: 10 units error detection specified by ITU-RM.493.

Memory capacity: Received Distress messages: 20

Received Other messages: 20

Transmitted message: 11

Clock: Within +/- 30ppm

Data backup time: 24 hours (message content and time data)

Mark frequency: 1615 +/- 0.5Hz

Space frequency: 1785 +/- 0.5Hz

Output level: 0dBm (-20 to +10dBm variable/600 ohms balanced)

Input frequency : 1700 +/- 85Hz

Input level : -25 to +10dBm (600-ohm balanced load)

NBDP MODEM

Communications protocol: In conformity with ITU-RM.476, M.490, M.491, M.492, M.625

and ITU-T Rec. F130