SECTION 4 | TECHNICAL DESCRIPTION |
|
4.1 | RECEIVING CIRCUIT OPERATION | 25 |
4.1.1 | Antenna Switching Circuit | 25 |
4.1.2 | High Frequency Amplifier Circuit | 25 |
4.1.3 | 1st Intermediate Frequency Amplifier Circuit | 25 |
4.1.4 | 2nd Intermediate Frequency Amplifier Circuit | 25 |
4.1.5 | Low Frequency Circuit | 26 |
4.1.6 | Squelch Circuit | 26 |
4.1.7Low Frequency Treatment Circuit (CPU AF 26
| Board) |
|
|
|
|
4.1.8 | WX Alert Detection |
|
| 26 | |
4.2 | TRANSMITTING CIRCUIT OPERATION |
| 26 | ||
4.2.1 | Microphone Amplifier Circuit |
| 26 | ||
4.2.2 | High Frequency Power Amplifier |
| 27 | ||
4.2.3 | APC Circuit |
|
|
| 27 |
4.2.4 | Antenna Monitoring Circuit |
| 27 | ||
4.3 | PLL CIRCUIT OPERATION |
| 27 | ||
SECTION 5 | MAINTENANCE |
|
|
|
|
5.1 | GENERAL |
|
|
| 30 |
5.1.1 | How to contact Raymarine |
| 30 | ||
5.2 | PREVENTATIVE MAINTENANCE |
| 31 | ||
5.3 | ALIGNMENTS AND SERVICE |
| 31 | ||
5.3.1 | Test Equipment |
|
| 32 | |
5.3.2 | PLL Adjustment |
|
| 32 | |
5.3.3 | Frequency Adjustment (TRANSMITTER) | 33 | |||
5.3.4 | Modulation Adjustment (TRANSMITTER) | 33 | |||
5.3.5 | Power Output Adjustment |
| 33 | ||
5.3.6 | RF Sensitivity Adjustment (RECEIVER) | 33 | |||
5.3.7 | Weather | Alert | Frequency | Adjustment 34 | |
| (RECEIVER) |
|
|
|
|
5.4 | TROUBLE SHOOTING GUIDE |
| 34 | ||
5.4.1 | Master Reset |
|
| 34 | |
SECTION 6 PARTS LIST & DRAWINGS |
|
| |||
6.1 | PART LOCATION LIST |
|
| 37 | |
6.2 | ASSEMBLY DRAWING |
|
| 43 | |
6.3 | SCHEMATIC DRAWING |
|
| 45 | |
SECTION 7 | APPENDIX |
|
|
|
|
7.1 | VHF MARINE CHANNEL USAGE GUIDE |
| 52 | ||
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