User's Guide

DE
DANIELS
ELECTRONICS
UHF Transmitter Instruction Manual UT-3 896 - 960 MHz 1-3
Frequency Generation: Synthesized (internal plug-in module: 2 bands).
Reference Frequency: 9.600000 MHz.
Channel Selection: In 6.25 kHz increments selected through four internal BCD
rotary switches. Preset capability for 16 channel memory
selectable through external control.
Frequency Stability: Standard: ±1ppm -30°C to +60°C.
Optional: ±1ppm -40°C to +60°C.
Optional: High stability external reference.
System Impedance: 50 Ω; Type N (Standard).
Duty Cycle: 100%; Continuous operation +60°C
Spurious Emissions: More than -80dB below carrier.
Hum and Noise Level: 45 dB (300 Hz to 3.4 kHz).
Front Panel Control: NORM (repeat mode), OFF, and KEY TX (Tx on).
PTT Activation: • Active to ground with or without time-out timer;
• Microphone activated with or without time-out timer;
• Front Panel switch:
KEY TX - without time-out timer
NORM - with or without time-out timer.
• Isolated (optional relay) with or without time-out timer.
PTT Time-Out-Timer: Selectable 1 second to 8 hours (factory set 5 minutes).
Transmitter Mismatch Protection: 20:1 VSWR at all phase angles. Protected by internal ferrite
Isolator
Transmitter Alarm: Forward power sense and reverse VSWR;
• open collector output (separate or 'OR'ed configuration);
• linear output (separate lines only).
Transmit Current: 1.8 Amps at 3 Watts RF Power Output.
Standby Current and Rise time: 95% RF power, 95% system deviation within;
50 ms: typically 7 mA (Mode 1),
25 ms: typically 50 mA (Mode 2),
10 ms: typically 75 mA (Mode 3).
Operating Temperature Range: -30˚C to +60˚C (Optional: -40˚C to +60˚C).
Operating Humidity: 95% R.H. (Non-condensing) at +25°C.