Daniels VT-3/140-SWA2, Instruction Manual

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1-4 VHF Enhanced Transmitter Instruction Manual VT-3 132 - 174 MHz
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 from 1 sec. to 8 hrs. (factory set 5 min.).
1.4.2 Audio Specifications
Audio Input: Balanced 600 ohm or unbalanced (optional).
Input level sensitivity, -25 dBm to 0 dBm.
Audio Response: Pre-emphasis (6 dB per octave); +1.0 to -2.0 dB
from 300 Hz to 3 kHz;
Flat Audio Response: +1 to -1 dB from 100 Hz to 3 kHz.
Audio Deviation: Preset to ±3.0 kHz with a 1 kHz tone.
Subtone Audio Input 1: 0.5 Vpp at 200 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 1 Frequency range: 60 Hz to 300 Hz.
Subtone Audio Input 2: 0.5 Vpp at 100 Hz for ±500 Hz deviation
(internally adjustable).
Subtone Audio Input 2 Frequency range: DC to 150 Hz.
Direct Modulation Input: 0.5 Vrms at 1 kHz or ±3 kHz deviation.
Direct Modulation Frequency range: DC to 5 kHz.
Audio Distortion: Less than 2.5% THD; 1 kHz tone at 1.5 kHz or
3 kHz deviation (-40°C to +60°C).
Hum and Noise: Better than 55 dB
(test receiver band limited: 400 Hz to 30 kHz).