Adjacent Channel Monitor (Acm) Cw Mode Only - Yaesu FTDX9000D - DATA MANAGEMENT Operation Manual

A
DJACENT
While operating on CW on the Main band (VFO-A), the ACM feature provides a visual indicator of encroachment by
another station (someone you may not be able to hear because of the tight DSP filter in your FT
of a nearby strong signal will be displayed on the Sub-receiver's S-meter. The Sub (VFO-B) receiver is taken over by the
ACM, when engaged, and reception on the Sub band (VFO-B) is not possible while ACM it turned on.
To activate the Adjacent Channel Monitor, press the
[ ACM ] switch. The LED imbedded in the switch will
glow Red.
If you do not have Dual Receive engaged, turning on the ACM feature will cause the [ RX ] LED associated with
the Sub (VFO-B) receiver to become illuminated.
When ACM is turned on, the frequency of the Sub (VFO-B) receiver will automatically be set to match that of
the Main (VFO-A) receiver.
When operating on Dual Receive, engaging the ACM feature automatically sets the Sub (VFO-B) receiver to
the same frequency as the Main (VFO-A) receiver, and by inverting the DSP filter the Sub receiver is used for
monitoring (visually) for activity outside your current receiver passband on the Main receiver.
When ACM is turned on during Dual Receive operation, the audio from the Sub (VFO-B) receiver will disappear.
A typical operating circumstance where ACM can help is when you are running stations during a contest in a 250
Hz bandwidth. If stations suddenly stop calling you, it may be because another strong station has started calling CQ
near your frequency. By engaging ACM, your Sub-receiver S-meter will display the strongest station on the area ±
1.2 kHz from your current operating frequency; if the encroaching station is sufficiently close, you might want to
ask him or her kindly to QSY.
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