Cw Spotting ( Zero-Beating ); Cw Convenience Features - Yaesu FT-991 Operating Manual

"Spotting" (zeroing in on another CW station) is a handy technique to ensure you and the other station are precisely on
the same frequency.
The Tuning Offset Indicator in the display may also be moved so you can adjust your receiver frequency to center the
incoming station on the pitch corresponding to that of your transmitted signal.
Using the Auto Zeroing System
(Only when the optional FFT unit is installed)
Press the F(M-LIST) button,
LCD to adjust the receiving frequency to the zero-in au-
tomatically while receiving the CW signal.
Using the SPOT System
Press the F(M-LIST) button,
Touch [ MONI ] on the LCD, the Spot tone will be
LCD.
heard through your speaker. This tone corresponds to the
pitch of your transmitted signal. If you adjust the receiv-
er frequency until the pitch of the received CW signal
matches that of the Spot tone, your transmitted signal
will be precisely matched to that of the other station.
Touch [ SPOT ] on the LCD again to turn the Spot tone
off.
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dvice
 In a tough DX pile-up, you may actually want to
use the SPOT system to find a "gap" in the spread
of calling stations, instead of zeroing in precisely
on the last station being worked by the DX station.
From the DX side, if a dozen or more operators (also
using Yaesu's SPOT system) all call precisely on the
same frequency, their dots and dashes merge into a
single, long tone that the DX station cannot decipher.
In such situations, calling slightly higher or lower in
frequency may get your call through.
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 The displayed frequency on CW normally reflects
the "zero beat" frequency of your offset carrier. That
is, if you were to listen on USB on 14.100.00 MHz
to a signal with a 700 Hz offset, the "zero beat" fre-
quency of that CW carrier would be 14.100.70 MHz;
the latter frequency is what the FT-991 displays, by
default. However, you can change the display to be
identical to what you would see on SSB by using
Menu item "060 CW FREQ DISPLAY" and setting
it to "DIRECT FREQ" instead of the default "PITCH
OFFSET" setting.
FT-991 O
peraTing
Cw C
cw S
potting
then touch [ ZIN ] on the
then touch [ SPOT ] on the
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anual
onvenienCe
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ero eAting
f
eaTures
F(M-LIST) Button
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