Yaesu FT-450D, Technical Supplement

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ALIGNMENT-8
Alignment
FT-450 Series Technical Supplement
TX Gain Adjustment

Connect the 50-Ohm Dummy Load and Wattme-
ter to the "ANT" jack.

Connect the Audio Generator to pin 5 of the MIC
jack (pin 7: GND), then set the output level to 1
mV @1 kHz.

Press and hold in the [ ATT / IPO ], [ NB ], and [ AGC ]
buttons, while turning the radio on, to enter the
alignment mode.
ALC Meter Adjustment

Connect the 50-Ohm Dummy Load and Wattme-
ter to the "ANT" jack.

Press and hold in the [ ATT / IPO ], [ NB ], and [ AGC ]
buttons, while turning the radio on, to enter the
alignment mode.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "ALCM L".

Press the PTT switch, then press the [ STO ] but-
ton.

Connect the Audio Generator to pin 5 of the MIC
jack (pin 7: GND), then set the output level to 4
mV @1 kHz.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "ALCM H".
Press the PTT switch, then press the [
STO ] but-
ton.

Press and hold in the [ F ] button for 2 seconds to
save the new setting and exit from the alignment
mode.
Reverse ALC Adjustment

Connect the 16.6-Ohm Dummy Load (parallel
connections of the three 50-Ohm Dummy Loads)
to the "ANT" jack.

Press and hold in the [ ATT / IPO ], [ NB ], and [ AGC ]
buttons, while turning the radio on, to enter the
alignment mode.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "1-RALC".

Press the PTT switch, then rotate the [ MAIN DIAL ]
knob for 50 W on the PO meter of the FT-450.

Release the PTT switch.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "2-RALC".

Press the PTT switch, then rotate the [ MAIN DIAL ]
knob for 50 W on the PO meter of the FT-450.

Release the PTT switch.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "3-RALC".

Press the PTT switch, then rotate the [ MAIN DIAL ]
knob for 50 W on the PO meter of the FT-450.

Release the PTT switch.

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "50RALC".

Press the PTT switch, then rotate the [ MAIN DIAL ]
knob for 50 W on the PO meter of the FT-450.
Release the PTT switch.
Press and hold in the [
F ] button for 2 seconds to
save the new settings and exit from the alignment
mode.

Press and hold in the [
F
] button for 2 seconds to
save the new settings and exit from the alignment
mode.
AM Carrier Level Adjustment

Connect the 50-Ohm Dummy Load and Wattme-
ter to the "ANT" jack.

Press and hold in the [ ATT / IPO ], [ NB ], and [ AGC ]
buttons, while turning the radio on, to enter the
alignment mode.

Set the [ MODE ] switch to "AM".

Rotate the [ DSP/SEL ] knob to select the align-
ment parameter "AM-CAR".

Press the PTT switch, then rotate the [ MAIN DIAL ]
knob for 25 W±2 W on the Wattmeter.

Release the PTT switch.

Press and hold in the [ F ] button for 2 seconds to
save the new setting and exit from the alignment
mode.
A
LIGNMENT
P
ARAMETER
TXG1H
TXG2H
TXG3H
TXG4H
TXG5H
TXG6H
TXG7H
TXG1L
TXG2L
TXG3L
TXG4L
TXG5L
TXG6L
TXG7L
W
ATTMETER
50 W ±10 W
50 W ±10 W
50 W ±10 W
50 W ±10 W
50 W ±10 W
50 W ±10 W
50 W ±10 W
10 W ±2 W
10 W ±2 W
10 W ±2 W
10 W ±2 W
10 W ±2 W
10 W ±2 W
10 W ±2 W