User's Manual

RPT 633
TM 1184 Issue 1Page 1 - 2
PHYSICAL CONSTRUCTION
4. The transmitter consists of two boards, a transmitter board mounted in the base
assembly and a VOX keying module mounted in the cover assembly.
SPECIFICATIONS
Transmitter
5. The following describes the performance and physical characteristics of the RPT 633
UHF transmitter:
a) Frequency Range: 420MHz to 470MHz
b) Frequency Bands: Band 1 420MHz to 424.99MHz
Band 2 425MHz to 446.99MHz
Band 3 447MHz to 470MHz
c) Channel Spacing: Factory set to 10kHz, 12.5kHz, 20kHz
or 25kHz
d) Frequency Stability (normal): ±5ppm from -10EC to +55EC
(high stability): ±1.5ppm from -10EC to +55EC
±2ppm from -25EC to +55EC
±2.5ppm from -30EC to +60EC
e) Output Power: 2.5W ±1dB
f) Duty Cycle: 50% (Max transmit time 2.5 minutes)
g) Nominal Load Impedance: 50 Ohms
h) VSWR Protection: Protection against short term removal
of antenna (maximum of five calls with
antenna disconnected).
Connectors
6. The following connectors are mounted on the transmitter board:
a) PSU - SK3: 2.1mm jack socket
b) Digital - SK2: 2-way modular keyed connector
c) Analogue - SK1: 2-way modular keyed connector
d) RF - SK4: TNC socket