Yaesu FTDX-9000MP Operation Manual

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Page 52 FTDX9000MP OPERATION MANUALUsing Headphones for Dual ReceiveTo take advantage of dual reception, you will want to connect stereo headphones to the PHONES jack. Like the AFGAIN control, headphone audio mixing can also be configured as desired from Menu Selection: [RX AUDIO 076HEADPHONE MIX]. Three audio mixing schemes are selectable as follows:OFF: Audio from the Main (VFO-A) band receiver is heard only in the left ear, and Sub band (VFO-B) receiver audiosolely in the right ear.MID: Audio from both Main (VFO-A) band 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 (VFO-A) band audio is attenuated in the right ear.FULL: Audio from both Main (VFO-A) band and Sub (VFO-B) band receivers is combined and heard equally in bothears “Monaural” mode).Sideband Diversity ReceptionHere you receive a single AM signal through the two receivers, each receiving the opposite sideband. Skywave-propagatedsignals often show phase distortion in this mode, but it gives you a view of the entire passband, from which you can thenselect the best sideband for listening (or for SWL Dx’ing, you may want to listen to both sidebands at the same time, to getthe best copy). On groundwave signals, where the phase of the sidebands is likely to be the same, there is an interestingsense 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 anexternal stereo speaker connected to the rear panel EXT SP jacks.DUAL R ECEIVE : F ULL D UPLEX O PERATION Set the Main (VFO-A) band to either LSB or USBmode, and tune for zero beat on the desired signal. Press the AB button (# ) to copy this mode andfrequency into the Sub (VFO-B) band, then press themode button to select the opposite sideband for theMain (VFO-A) band. If using headphones, set the headphone mixing schemeto the “MID” mode via the Menu Selection 15: HeadPhone Mix (MIX, AMIX), and activate dual recep-tion. Adjust the AF GAIN knob(s) (# and ) to bal-ance the volume of the two receivers.If interference is present on one of the channels, you mayhave to turn its AF GAIN control to suppress that chan-nel (or press the green RX LED/button to disable thereceiver with the sideband experiencing interference). Oth-erwise, try changing the headphone audio mixing schemeto “FULL” or “OFF” in the Menu Selection: [RX AUDIO076 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 thepotential for much better copy than in regular AM or evensingle-sideband ECSS modes.CONVENIENT F EATURESSwitchMAIN(VFO-A)AF GAIN KnobSUB(VFO-B)AF GAIN KnobSUB(VFO-B)RX KeySUB(VFO-B)RX Key