Codan Radio Communications VT-3-150-SN User Manual
Transmitter Main Board Instruction Manual
3-3
• Jumper J26:
installed
Time-Out-Timer Timing resistor select.
• Jumper J27:
not installed
Time-Out-Timer Timing resistor select.
• Jumper J28:
not installed
Time-Out-Timer Timing period output select.
• Jumper J29:
installed
Time-Out-Timer Timing period output select.
• Jumper J31:
installed
Time-Out-Timer Timing period output select.
• Jumper J32:
not installed
Time-Out-Timer Timing period output select.
• Jumper J33:
installed
Time-Out-Timer input enable
• Jumper J34:
installed
Time-Out-Timer power enable
• Jumper J35:
installed
Time-Out-Timer output enable
Note: Jumpers J1, J5, J8, J10, J11 designations not used
3.5.2 MT-3 Audio Processor Factory Configuration (Version 1.6)
The MT-3 Audio Processor is factory configured as follows:
• Maximum Deviation:
±2.5 kHz (12.5 kHz or 15 kHz channel),
±5.0 kHz (25 kHz or 30 kHz channel).
±5.0 kHz (25 kHz or 30 kHz channel).
• Microphone Input:
1 kHz signal at -10 dBm gives ±50% maximum deviation,
1 kHz signal compression set at ±60% maximum deviation.
1 kHz signal compression set at ±60% maximum deviation.
• Audio Balanced Input:
Enabled - pre-emphasis response,
1 kHz tone at -8 dBm gives ±60% maximum deviation.
1 kHz signal compression set at ±60% maximum deviation.
1 kHz tone at -8 dBm gives ±60% maximum deviation.
1 kHz signal compression set at ±60% maximum deviation.
• Subtone Input 1:
100 Hz tone at -18 dBm gives ±500 Hz deviation.
• All other audio inputs:Disabled.
• Time-Out-Timer:
5 minutes ± 30 seconds.
The corresponding Audio Processor jumper settings are:
• Jumper JU1:
not installed
Power source select for Direct Modulation circuits.
• Jumper JU2:
not installed
MT-2 deviation enable (MT-2 transmitters).
• Jumper JU3:
installed
Microphone preamplifier power enable.
• Jumper JU4:
installed
Balanced audio preamplifier power enable.
• Jumper JU5:
not installed
Balanced audio ground enable.
• Jumper JU6:
installed
Processed audio path enable (limited and filtered).
• Jumper JU7:
not installed
Unprocessed auxiliary audio path enable (unfiltered).
• Jumper JU8:
not installed
Audio output DC coupled (MT-2 transmitters).
• Jumper JU9:
installed
Balanced input preemphasis response enable.
• Jumper JU10: not installed
Balanced input flat audio response enable.