5-3 PA AND FILTER UNITS ADJUSTMENT
| ADJUSTMENT | ADJUSTMENT CONDITIONS |
| MEASUREMENT |
| VALUE | ADJUSTMENT | ||||||
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| LOCATION | UNIT | ADJUST | |||||||||
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| IDLING | 1 | • Operating frequency | : 12.2350 MHz | Rear |
| Connect | an ammeter | 2.0 A | PA | R6304 | ||
| CURRENT |
| • Mode | : J3E | panel |
| (10 A) between an |
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| (For drive |
| • Apply no audio signal to the [MIC] con- |
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| external power supply |
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| FETs) |
| nector. |
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| and the transceiver. |
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| • Disconnect J6702. |
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| • Preset R6304 and R6412 on the PA |
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| unit to max. counter clockwise. |
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| • Preset R6515 on the PA unit to max. |
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| clockwise. |
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| • Connect a dummy load or RF power |
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| meter to the [ANT] connector. |
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| • Transmitting |
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| (For final | 2 | • Transmitting |
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| 0.7 A |
| R6412 | |
| transistors) |
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| • After adjustment, connect J6701 to the PA unit. |
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| SWR | 1 | • Operating frequency | : 22.0000 MHz | Rear |
| Connect an RF power | 90 W | Audio | Output | |||
| DETECTOR |
| • Mode | : J3E | panel |
| meter to | the | [ANT] |
| gen- | level | |
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| • Connect the CP7332 (FOR line) on |
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| erator |
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| the FILTER unit to ground. |
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| 2 | • Connect an audio | generator to the | FIL- |
| Connect | a DC | volt- | Minimum level | FIL- | C7275 |
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| [MIC] connector and set as: | TER |
| meter to | the | check |
| TER |
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| Frequency | : 1.5 kHz |
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| point, CP7331. |
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| Level | : OFF |
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| • Transmitting |
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| • After adjustment, disconnect CP7332 (FOR line) on the FILTER unit from ground. |
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5 - 5
