Adjacent Channel Monitor (Acm) -- Cw Mode Only - Yaesu FT DX 9000 CONTEST Operation Manual

A
DJACENT
When the optional Dual Receive Unit (RXU-9000) is installed, the Adjacent Channel Monitor will be available for use
(because it utilizes the second receiver to provide the ACM function). ACM utilizes the VFO-B to monitor a 2.4 kHz
window outside your current CW passband (for example, 500 Hz) for the VFO-A. The peak signal strengths within this
2.4 kHz window are displayed on the VFO-B S-meter, alerting you to encroachment from other stations.
To activate the Adjacent Channel Monitor, press the
[ ACM ] switch. The LED imbedded in the switch will glow
Red.
When ACM is turned on during Dual Receive operation, the audio from the VFO-B 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 VFO-B 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.
A
DVICE
By rotating the VFO-B [ AF GAIN ] control fully counter-
clockwise, then setting the VFO-A [ AF GAIN ] control to a
comfortable listening level, you will be able to hear the de-
sired signal within the 300 Hz passband selected.
In addition, if you rotate the VFO-A [ AF GAIN ] control fully
counter-clockwise, then advance the VFO-B [ AF GAIN ] con-
trol, you will be able to hear audio from the passband 1.05
kHz on either side of the VFO-A's 300 Hz passband, but you
will not hear the audio from within that 300 Hz passband. In
other words, you can monitor everything outside the selected
300 Hz bandwidth, but within a 2.4 kHz window, by advanc-
ing the VFO-B [ AF GAIN ] control.
FT 9000 C O
DX ONTEST
C M
HANNEL ONITOR
M
PERATION ANUAL
D D D D D R R R R R U U U U U
U U U U U AL AL AL AL AL ECEIVE ECEIVE ECEIVE
ECEIVE ECEIVE
( ACM )
-- CW M
ODE
[ ACM ] Switch
A
DVICE
If you do not have Dual Receive engaged, turn-
ing on the ACM feature will cause the [ RX ]
LED associated with the VFO-B to become il-
luminated.
When ACM is turned on, the frequency of the
VFO-B will automatically be set to match that
of the VFO-A.
When operating on Dual Receive, engaging the
ACM feature automatically sets the VFO-B to
the same frequency as the VFO-A, and by in-
verting the DSP filter the VFO-B is used for
monitoring (visually) for activity outside your
current receiver passband on the VFO-A.
300Hz
1.05 Hz ｋ
( RXU-9000 RXU-9000 )
RXU-9000 RXU-9000
RXU-9000
NIT NIT NIT NIT NIT
--
O
NLY
VDD BIAS TEMP SWR
1.05 Hz ｋ
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