Yaesu FTDX-9000D, Руководство по эксплуатации

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Page 50 FT
DX
9000D O
PERATION
M
ANUAL
Using Headphones for Dual Receive
To take advantage of dual reception, you will want to connect stereo headphones to the PHONES jack. Like the AF GAIN
control, headphone audio mixing can also be configured as desired from Menu Selection “RX AUDIO 076 HEADPHONE
MIX.” Three audio mixing schemes are selectable as follows:
OFF : Audio from the Main band (VFO-A) receiver is heard only in the left ear, and Sub band (VFO-B) receiver audio
solely in the right ear.
MID : Audio from both Main (VFO-A) and Sub (VFO-B) band receivers can be heard in both ears, but Sub band (VFO-
B) audio is attenuated in the left ear and Main band (VFO-A) audio is attenuated in the right ear.
FULL : Audio from both Main (VFO-A) and Sub (VFO-B) band receivers is combined and heard equally in both ears
“Monaural” mode).
Sideband Diversity Reception
Here you receive a single AM signal through the two receivers, each receiving the opposite sideband. Skywave-propagated
signals often show phase distortion in this mode, but it gives you a view of the entire passband, from which you can then
select the best sideband for listening (or for SWL Dx’ing, you may want to listen to both sidebands at the same time, to get
the best copy). On groundwave signals, where the phase of the sidebands is likely to be the same, there is an interesting
sense of depth to the signal.
To tune in a signal using this mode, you should have stereo headphones connected to the front panel PHONES jack or an
external stereo speaker connected to the rear panel EXT SP jacks.
D
UAL
R
ECEIVE
: F
ULL
D
UPLEX
O
PERATION
Ì
Set the main band (VFO-A) to either LSB or USB
mode, and tune for zero beat on the desired signal.
Ì
Press the A B button (# ) to copy this mode and
frequency into the sub band (VFO-B), then press the
mode button to select the opposite sideband for the
main band (VFO-A).
Ì
If using headphones, set the headphone mixing scheme
to the “COMBINE-1” mode via the Menu Selection
76: Head Phone Mix , and activate dual reception.
Ì
Adjust the AF GAIN knob(s) to balance the vol-
ume of the two receivers.
If interference is present on one of the channels, you may
have to turn its AF GAIN control to suppress that channel
(or press the green “RX” LED/button to disable the re-
ceiver with the sideband experiencing interference). Oth-
erwise, try changing the headphone audio mixing scheme
to “FULL” or “OFF” in the Menu Selection “RX AUDIO
076 HEADPHONE MIX” for different effects (or try set-
tings with similar effects on your external amplifier). Al-
though you don’t get the “stereophonic” effect in the mon-
aural mode, the two signals are still mixed, offering the
potential for much better copy than in regular AM or even
single-sideband ECSS modes.
C
ONVENIENT
F
EATURES
switch
switch
Main (VFO-A)
switch
Sub (VFO-B)