Yaesu FT-857D Operating Manual page 55

This adjustment also controls the BFO offset (actual pitch of your transmitted signal
relative to your current receive frequency). To adjust the CW sidetone pitch:
Ÿ Press and hold in the [ FUNC ] key for one second to enter the Menu mode.
Ÿ Rotate the SELECT knob to Menu Mode No-027 [ CW PITCH ] .
Ÿ Rotate the DIAL to select a new pitch tone/BFO offset. The available offset range is
400 ~ 800 Hz (default value is "700 Hz").
Ÿ When done, press and hold in the [ FUNC ] key for one second to save the new setting
and exit to normal operation.
9. The FT-857 also has a "CW SPOT" feature, utilizing the sidetone. Because the sidetone
is a representation of the actual pitch of your transmitted signal, it may be used for
zeroing in on another station. To activate the CW SPOT tone, just press and hold in the
[ HOME ] key for one second while in the CW mode.
Pressing the [ A ]( SPOT ) key while in Multi Function Row "j" [SPOT, BK, KYR]
will also activate the CW SPOT tone.
FT-857 Operating Manual
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RANSMITTER
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RANSMISSION
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PERATION
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