Parts List

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 T ime-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: ins talled 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).
• Microphone Input: 1 kHz signal at -10 dBm gives ±50% maximum deviation,
1 kHz signal compression set at ±60% maximum deviat ion.
• 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.
• 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 deviati on 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.