Alinco DJ-438, Руководство по обслуживанию

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Reference Frequency Adjustment
1. In the adjustment mode, select channel 1 by rotating the main tuning dial.
2. Press the ( p f T ) key to start transmission.
3. Rotate TC1 on the Main board until the value on the frequency counter
matches the one displayed on the LCD.
4. On 435.00MHz measure TP1 near the VCO and to obtain 0.8V±0.1 V
( If the frequency display is flashing, the PLL is unlocked.)
High Power Adjustment
1. In the adjustment mode, select channel 2 by rotating the main tuning dial.
2. Hold down the (FUNC) key and press the H/L key to enter the high power
mode. (“L” at the upper-left of the display disappears.)
3. Hold down the i^PTT^ kev to start transmission.
4. While watching the reading of the TX power meter, set the output power to
the value closest to 5 W by rotating the main tuning dial.
5. When the ( P f T ) key is released, the output power at that time will be
stored as the high power setting.
Low Power Adjustment
1. In the adjustment mode, select channel 3 by rotating the main tuning dial.
2. Hold down the (FUNC) key and press the H/L key to enter the high power
mode. (“L” appears at the upper-left of the display.)
3. Hold down the (~P T D key to start transmission.
4. While watching the reading of the TX power meter, set the output power to
the value closest to 0.8 W by rotating the main tuning dial.
5. When the ( P f T ) key is released, the output power at that time will be
stored as the low power setting.
Minimum Frequency Sensitivity Adjustment
See “Note on Adjusting the Sensitivity” later in this section.
1. In the adjustment mode, select channel 4 by rotating the main tuning dial.
2. Set the minimum frequency sensitivity rotating the main tuning dial, while F
appears after the
(FUNC)
key is pressed.
Medium Frequency Sensitivity Adjustment
See iNote on Adjusting the Sensitivity! later in this section.
1. In the adjustment mode, select channel 5 by rotating the main tuning dial.
2. Set the medium frequency sensitivity rotating the main tuning dial, while F
appears after the (FUNC} key is pressed.
Maximum Frequency Sensitivity Adjustment
See “Note on Adjusting the Sensitivity” later in this section.
1. In the adjustment mode, select channel 6 by rotating the main tuning dial.
2. Set the maximum frequency sensitivity rotating the main tuning dial, while
F appears after the (FUNC) key pressed.