Advanced Operation; If Shift; Agc (Automatic Gain Control) - Yaesu FT-891 Operating Manual

Advanced Operation

IF SHIFT

The receiver's IF SHIFT feature is an effective interference-reduction tool, which allows
you to shift the passband response higher or lower without changing the pitch of the
incoming signal.
1. Rotate the MULTI knob, as needed, until
Multi Function Row "F-05 [ SHIFT ] [ WIDTH ]
[ NOTCH ] " appears on the display.
2. Press the [ A ]( SHIFT ) key to activate the IF
SHIFT feature.
3. Rotate the MULTI knob, as needed, to re-
duce or eliminate the interference.
4. To turn the IF SHIFT feature off, press the [ F ] key. The last setting of the IF SHIFT
control will be retained until you change it again.

AGC (Automatic Gain Control)

The receiver recovery time constant of the AGC system may be modified to match your
operating needs.
1. Rotate the MULTI knob, as needed, un-
til Multi Function Row "F-04 [ NB ] [ AGC ]
[ MONI ] " appears on the display.
2. Press the [ B ]( AGC ) key to toggle the AGC
recovery time constant among the following
selections:
Where "AUTO" represents "FAST" on CW and DIG (AFSK), and "SLOW" on the voice
modes. If you disable the AGC by press and hold the [ B ]( AGC ) key, the S-meter (which
monitors AGC voltage) will cease to function. Depending on the setting of the RF Gain
control, incoming signals will probably be distorted if the AGC is turned off.
18
AUTO à FAST à MID à SLOW à AUTO à .....
Application for FCC / IC
FCC ID: K6620651X50 / IC: 511B-20651X50
FT-891 Operating Manual