FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.
24
ALL:
Locks all front panel keys and knobs (except POWER and LOCK keys) and microphone keys.
4. When you have made your selection, Press and hold in the [F] key for one second to save the new
setting and exit to normal operation.
When the controls are locked out, press the LOCK button once more to release them to normal 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. Press and hold in the CLAR/IF SHIFT button for one second to activate the IF SHIFT feature. An icon, such as “
”,
“
S
” (slightly shifted to the upper side), “
SS
” (more shifted to the upper side), “
T
”(slightly shifted to the lower
side),” or “
TT
” (more shifted to the lower side)” icon will appear at the right of the frequency display to indicate the
IF SHIFT’s current position.
2. Rotate the CLAR knob, as needed, to reduce or eliminate the interference.
3. To turn the IF SHIFT feature off, again press and hold in the CLAR/IF SHIFT button for one second. The last setting
of the IF SHIFT control will be retained until you change it again.
If you wish to make a more permanent shift in the receiver’s IF passband, use Menu Mode No-015 [CAR LSB R] (for
LSB mode) or No-017 [CAR USB R] (for USB mode). This allows you to set up a higher or lower listening pitch, if you
prefer such as compared to the default passband response. See page 55.
AGC (Automatic Gain Control)
The receiver recovery time constant of the AGC system may be modified to match your operating needs.
1. Press the [F] key momentarily, then rotate the MEM/VFO CH knob, as needed, until Multi Function Row “l” [NB,
AGC, AUTO] appears on the display.
2. Press the [C] key to toggle the AGC recovery time constant among the following selections:
AUTO
∏
FAST
∏
SLOW
∏
AUTO
∏
where “AUTO” represents “FAST” on CW and DIG (AFSK), and “SLOW” on the voice modes.
If you disable the AGC by pressing the [B](AGC) key (to make the parentheses disappear), 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.
Noise Blanker
The IF Noise Blanker may be useful in reducing or eliminating some types of impulse noise, especially noise generated
