Dsp Notch Filter; Am/Fm Tuning Dial Operation - Vertex Standard FT-857 Operating Manual

2. Press the [A](DNR) key to activate the DSP Noise Reduction feature. "Parentheses" will appear on the both sides of
the "DNR" indication, and the "DSP" will appear at the center top on the display.
3. Now press and hold in the [A](DNR) key for one second. This instantly activates Menu Mode No-049 [DSP NR
LEVEL], which allows adjustment of the DSP Noise Reduction level.
4. Rotate the DIAL to find the point where best signal-to-noise ratio is obtained under the current noise conditions.
5. Press and hold in the [F] key for one second to save the new setting and exit to normal operation.
6. To turn off the DSP Noise Reduction feature, press the [A](DNR) key again.
If noise is present at a level which causes indication on the S-meter, the performance of the Noise Reduction filter may be
enhanced by rotating the SQL/RF (RF Gain) control in a counter-clockwise direction so as to set the (fixed) S-meter
reading at the same level as the noise peaks. This adjustment raises the AGC threshold of the receiver.
The DSP system's Notch Filter may be helpful in removing one or more offending carrier or heterodyne signals from the
audio passband.
1. Press the [DSP] key momentarily. This instantly activates Multi Function Row "p" [DNR, DNF, DBF].
2. Press the [B](DNF) key to activate the Notch Filter. "Parentheses" will appear on the both sides of the "DNF"
indication, and the "DSP" will appear at the center top on the display. You will notice that the audio level of the
carrier signal is now being reduced.
3. Press the [B](DNF) key once more to turn the Notch Filter off.
Do not activate this filter in the CW mode, as incoming CW signals will be notched out of the audio passband!
In the AM and FM modes, the DIAL knob is locked out (via the setting of Menu Mode No-004 [AM&FM DIAL]) so as to
allow "channelized" tuning on these modes. To adjust the operating frequency, simply rotate the MEM/VFO CH knob.
If you wish to enable the DIAL for tuning in the AM and FM modes, change the setting of Menu Mode No-004 [AM&FM
DIAL]. See page 54 for details.
The "channelized" mode of tuning on AM and FM automatically rounds off the frequency to the next "logical" step when
you rotate the MEM/VFO CH knob one "click" in either direction. This eliminates the inconvenience of having to preset
the frequency to an "even" channel.

DSP Notch Filter

AM/FM Tuning Dial Operation

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FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.