Tx Gain Adjustment; Am Carrier Level Adjustment; Alc Meter Adjustment; Reverse Alc Adjustment - Yaesu FT-450/D Technical Supplement

Alignment

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.
A P
LIGNMENT ARAMETER
TXG1H
TXG2H
TXG3H
TXG4H
TXG5H
TXG6H
TXG7H
TXG1L
TXG2L
TXG3L
TXG4L
TXG5L
TXG6L
TXG7L
 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.
ALIGNMENT-8
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

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.
FT-450 Series Technical Supplement