Icom IC-756PRO - SECTION 3 CIRCUIT DESCRIPTION; 3-1 RECEIVER CIRCUITS

FM transmit modulation
- Set Radio to follows
- Frequency: 29.60000MHz
- Mode: FM
- Filter: 15KHz
- RF POWER: Maximum
- Mic Gain: Center
- Connect Modulation analyzer to ANT connector
- Connect AF signal generator to mic connector
- Apply 1KHz/10mV signals to mic connector
- Transmit
- Adjust R2227 on DSP board for 4.5KHz
- Apply 1KHz/1mV signals to mic connector
- Verify transmit modulation for 3.5KHz
AM Carrier Power
- Set radio to 14.100000MHz AM
- Set RF POWER pot to maximum
- Connect RF Power meter to Antenna connector
- Connect AF signal generator mic connector
- Apply no signals to mic connector
- Transmit
- Adjust R510 for 40W
- Apply 1KHz/10mV signals to mic connector
- Adjust R2229 on DSP board for 90%
Speech processor
- Set R392 to Center