General Description - Yaesu FTDX101D Operation Manual

General Description

Hybrid SDR configuration
In addition to the narrow band SDR receiver that boasts awesome basic performance, the FTDX101D has
a hybrid SDR configuration utilizing an integrated direct sampling SDR receiver, which permits visualiza-
tion of the spectrum of the entire band in real time.
By adopting the hybrid SDR method, and utilizing the features of the direct sampling method, wide-view
displays of the information in the entire band in real time, and improved performance of the entire receiv-
ing circuit with the narrow band SDR technology down conversion method are possible.
Comes equipped with three types of roofing filters
This transceiver is equipped with three types of roofing filters for 600 Hz, 3 kHz and 12 kHz bandwidths.
These narrow band filters are especially useful on a very crowded band during contests, because they
can dramatically attenuate powerful out-of-band signals in the first IF stage, and thus reduce their impact
in the second stage. Further, the excellent dynamic range and IP3 characteristics optimize the processing
of all signals ranging from faint to powerful.
Adopts 3DSS/Hybrid Dual SDR Display
In addition to the conventional waterfall display, a 3DSS (3 Dimensions Spectrum Stream) image method
has been newly adopted. The 3DSS image uses the horizontal axis (X axis) for frequency, the vertical
axis (Y axis) for signal intensity, and the Z axis for time. Compared to the conventional waterfall method,
the signal strength is displayed in three dimensions as well as in color, recognition of changes in the band
conditions is instant, convenient and intuitive.
The 3DSS waterfall display has a choice of the mono display that displays only the MAIN frequency band;
or the dual display that illustrates both the MAIN and SUB frequency bands.
The Hybrid Dual SDR Display presents two SDR outputs, narrow band SDR and direct sampling SDR,
combined the same screen. Since the display color of each SDR output can be changed, the band re-
ceived by the narrow band SDR receiver can be viewed while also observing the condition of the entire
band.
High-brightness TFT full-color display with touch-panel functionality
The FTDX101D is equipped with a 7-inch full-color TFT display. Operating functions, including the receiv-
ing band noise and signal interference reduction tools, are graphically displayed. Even while involved in
rigorous operations, such as DXpeditions and contests, the operator may instantly grasp the status of
each function.
Filter Function Display monitors the status of the passband
In the upper part of the display, an S meter and a filter function display present the state of the pass-band.
They are arranged independently for the MAIN Band and SUB Band respectively. In addition to the oper-
ating state of the interference removal functions, the filter function information is displayed. Not only can
you grasp the operating status of WIDTH, SHIFT, NOTCH and CONTOUR at a glance, you can also view
the status of the RF spectrum in the passband.
RF Pre-selector, Continuously Variable RF, & VC-TUNE
The newly developed VC tuning circuit drives a variable capacitor with a high-precision stepping motor
and is comparable with a µ-Tuning mechanism, it achieves remarkable interference reduction character-
istics with significant downscaling and maximum attenuation of -70 dB. When compared with the conven-
tional preset method, which switches a coil and a capacitor with a relay, the high-precision stepping motor
continuously follows the frequency inside the pass-band, there is no sense of discomfort as there is with
relay switching. Even when there are multiple powerful signals in the band, fine adjustment to the optimal
tuning point is possible.
Two selectable RF Stages amplify the desired signals from low band to
high band
Push-pull RF amplifier AMP1, and AMP2 are low noise negative feedback RF amplifiers that may be se-
lected or combined in series as is needed for various low-band, high-band, frequency and noise conditions.
In addition, the IPO (Intercept Point Optimization) function maximizes the dynamic range and enhances
the close multi-signal and inter-modulation characteristics of the receiver. The influence of strong broad-
casting stations, especially in the low bands, can be minimized.
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