Yaesu Musen Co. Ltd. 20251X50 사용자 설명서
FT-2000
Operating Manual
Vertex Standard Co., Ltd.
41
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.
Set the Main band (VFO-A) to either LSB or USB mode, and tune for zero beat on
the desired signal.
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).
(VFO-A).
If using headphones, set the headphone mixing scheme to the “Con1” mode via the
Menu item “088 rout HEADPHN,” and activate dual reception.
Adjust the [AF GAIN] knob(s) to balance the volume of the two receivers.
If interference is present on one of the channels, you may have to turn its [AF
GAIN] knob to suppress that channel (or press the green RX LED/button to disable
the receiver with the sideband experiencing interference). Otherwise, try changing
the headphone audio mixing scheme to “Con2” or “SEP” in the Menu item “088 rout
HEADPHN,” for different effects (or try settings with similar effects on your
external amplifier). Although you don’t get the “stereophonic” effect in the
monaural mode, the two signals are still mixed, offering the potential for much
better copy than in regular AM or even single-sideband ECSS modes.
the receiver with the sideband experiencing interference). Otherwise, try changing
the headphone audio mixing scheme to “Con2” or “SEP” in the Menu item “088 rout
HEADPHN,” for different effects (or try settings with similar effects on your
external amplifier). Although you don’t get the “stereophonic” effect in the
monaural mode, the two signals are still mixed, offering the potential for much
better copy than in regular AM or even single-sideband ECSS modes.
Bandwidth Diversity Reception
This mode involves receiving the same signal through two different bandpass filters.
The frequency and mode of both the Main band (VFO-A) and Sub band (VFO-B) are the
same. The Main band (VFO-A) can be set up for a wide bandpass, using the [WIDTH]
knobs, and the Sub band (VFO-B) for a narrow bandpass, resulting in a spatial
perception of the channel. Although any mode (except FM) can be used, CW offers the
widest array of choices, and perhaps the most startling effects on crowded channels.
Stereo headphones or an external stereo speaker are recommended for this mode. To