Bedienungsanleitung Yaesu FT-DX9000 (Seite 52 von 156) (Englisch)

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Page 50 FT DX 9000D OPERATION MANUAL

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.

DUAL RECEIVE: FULL DUPLEX OPERATION

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.

CONVENIENT FEATURES

switch

Main (VFO-A)

switch

Sub (VFO-B)

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