Yaesu FT-991A, Technical Supplement

Page: 22 / 131

Alignment
ALIGNMENT-11
FT-99
1
Technical Supplement
FM Squelch Adjustment

Set the VFO-A frequency to 145.900 MHz in the
FM-WIDE mode.

Connect the RF Signal Generator to the “144/430
MHz” ANT jack, then set the output level to -14
dBµ at the 145.900 MHz with ±3.5 kHz devia-
tion FM modulation of a 1 kHz audio signal.

Press and hold in the [A=B], [A/B], and [FAST]
keys, while turning the radio on, to enter the
alignment mode.

Rotate the [MULTI] Dial knob to select the
alignment menu item “08-01 FM SQL THW”.

Press the [F(M-LIST)] button to save the new
setting.

Press and hold in the [MENU(SETUP)] button
for one second to save the new setting and exit
the alignment mode.

Set the FM-NARROW mode.

Set the RF Signal Generator output level to -14
dBµ at the 145.900 MHz with ±1.75 kHz devia-
tion FM modulation of a 1 kHz audio signal.

Press and hold in the [A=B], [A/B], and [FAST]
keys, while turning the radio on, to enter the
alignment mode.

Rotate the [MULTI] Dial knob to select the
alignment menu item “08-02 FM SQL THN”.

Press the [F(M-LIST)] button to save the new
setting.

Press and hold in the [MENU(SETUP)] button
for one second to save the new setting and exit
the alignment mode.

Set the FM-WIDE mode.

Set the RF Signal Generator output level to +3
dBµ at the 145.900 MHz with ±3.5 kHz devia-
tion FM modulation of a 1 kHz audio signal.

Press and hold in the [A=B], [A/B], and [FAST]
keys, while turning the radio on, to enter the
alignment mode.

Rotate the [MULTI] Dial knob to select the
alignment menu item “08-03 FM SQL TI”.

Press the [F(M-LIST)] button to save the new
setting.

Press and hold in the [MENU(SETUP)] button
for one second to save the new setting and exit
the alignment mode.
FM Center Stop Adjustment

Set the VFO-A frequency to 145.900 MHz in the
FM-WIDE mode.

Connect the RF Signal Generator to the “144/430
MHz” ANT jack, then set the output level to
+10 dBµ at the 145.900 MHz with ±3.5 kHz de-
viation FM modulation of a 1 kHz audio signal.

Press and hold in the [A=B], [A/B], and [FAST]
keys, while turning the radio on, to enter the
alignment mode.

Set the RF Signal Generator to 145.897 MHz.

Rotate the [MULTI] Dial knob to select the
alignment menu item “09-01 FM CTR-L”.

Press the [F(M-LIST)] button to save the new
setting.

Set the RF Signal Generator to 145.903 MHz.

Rotate the [MULTI] Dial knob to select the
alignment menu item “09-02 FM CTR-H”.

Press the [F(M-LIST)] button to save the new
setting.

Press and hold in the [MENU(SETUP)] button
for one second to save the new setting and exit
the alignment mode.