Yaesu FT-2000D Operating Manual

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Yaesu FT-2000D Operating Manual Manual pdf 45 page image

Page 43FT-2000D O PERATING M ANUALC ONVENIENCE F EATURESDUAL RECEIVEUsing Headphones for Dual ReceiveTo take advantage of dual reception, you will want to con-nect stereo headphones to the PHONES jack. Like theAF GAIN control, headphone audio mixing can also beconfigured as desired from Menu item “091 routHEADPHN.” Three audio mixing schemes are selectableas follows:SEPSEPSEPSEPSEP: Audio from the Main band (VFO-A) receiver isheard only in the left ear, and Sub band (VFO-B)receiver audio solely in the right ear.Con1Con1Con1Con1Con1: Audio from both Main band (VFO-A) and Subband (VFO-B) receivers can be heard in both ears,but Sub band (VFO-B) audio is attenuated in theleft ear and Main band (VFO-A) audio is attenu-ated in the right ear.Con2Con2Con2Con2Con2: Audio from both Main band (VFO-A) and Subband (VFO-B) receivers are combined and heardequally in both ears “Monaural” mode).Sideband Diversity ReceptionHere you receive a single AM signal through the two re-ceivers, each receiving the opposite sideband. Skywave-propagated signals often show phase distortion in thismode, but it gives you a view of the entire passband, fromwhich you can then select the best sideband for listening(or for SWL Dx’ing, you may want to listen to both side-bands at the same time, to get the best copy). Ongroundwave signals, where the phase of the sidebands islikely to be the same, there is an interesting sense of depthto the signal.To tune in a signal using this mode, you should have ste-reo headphones connected to the front panel PHONESjack. Set the Main band (VFO-A) to either LSB or USBmode, and tune for zero beat on the desired signal. Press the [AXXXXXB] button to copy this mode and fre-quency into the Sub band (VFO-B), then press the modebutton to select the opposite sideband for the Main band(VFO-A). If using headphones, set the headphone mixing schemeto the “Con1Con1Con1Con1Con1” mode via the Menu item “091 routHEADPHN,” and activate dual reception. Adjust the [AF GAIN] knob(s) to balance the volumeof the two receivers. If interference is present on one of the channels, youmay have to turn its [AF GAIN] knob to suppress thatchannel (or press the green [RX] LED/button to dis-able the receiver with the sideband experiencing inter-ference). Otherwise, try changing the headphone au-dio mixing scheme to “Con2Con2Con2Con2Con2” or “SEPSEPSEPSEPSEP” in the Menuitem “091 rout HEADPHN,” for different effects (ortry settings with similar effects on your external am-plifier). Although you don’t get the “stereophonic” ef-fect in the monaural mode, the two signals are stillmixed, offering the potential for much better copy thanin regular AM or even single-sideband ECSS modes.