Yaesu FTDX101D Operation Manual page 7

WIDTH and the continuously variable Bandwidth SHIFT features per-
mit elimination of interfering signals
The WIDTH feature allows the bandwidth to be narrowed by rotating the WIDTH knob. The SHIFT feature,
can eliminate interference in one side of the passband. Often, weak signals disappear due to interfering
signals (including pile-ups). The interfering signals may be extracted, leaving only the desired signal, be-
cause of the unique DSP sharp filtering characteristics.
CONTOUR feature is renowned for effective noise reduction
Rather than using the DSP extremely sharp attenuation characteristics, the CONTOUR circuit provides
gentle shaping of the DSP passband filter, and can thus attenuate or peak bandwidth components in seg-
ments. The interfering signal can be naturally shaped without having part of the signal suddenly disrupted.
The contour function is very effective in making the desired signal rise out of the interference.
DNR (Digital Noise Reduction) by DSP digital processing
The incorporated digital noise reduction circuit may be set to the optimal working algorithm by varying the
15 step parameters according to the noise type.
NOTCH feature can eliminate an unwanted heterodyne, and the DNF
feature can instantly attenuate multiple heterodyne signals
When interfering beat signals are present in the receiver passband, the IF NOTCH feature can significant-
ly eliminate a narrow portion of the passband and remove the interfering signal. Moreover, when there are
multiple interfering signals, the DSP DNF (Digital Notch Filter) Automatic Tracking System can be effec-
tive, even when an interfering frequency is changing.
ABI (Active Band Indicator)
Band keys are arranged in a row at the top above the main dial so that the operation status of the MAIN
and SUB Bands can be checked at a glance. The band selected on the MAIN side is white, the band se-
lected on the SUB side is blue. The white and blue correspond to the colors of the MAIN and SUB Band
Switches.
When transmitting, the LED on the transmission band turns red. It is possible to instantly distinguish which
band is transmitting and thus prevent erroneous operation.
Additionally, when the band key is pressed and held, the LED lights up in orange, so you can use this to
display a band connected with an antenna, display a band to be operated with a DXpedition, etc., or as a
MEMO.
MPVD (MULTI PURPOSE VFO OUTER DIAL)
A large multi-functional ring, cut from high-grade aluminum is placed on the outside of the Main Dial. It is
frequently used for the SUB VFO dial, VC tune, Clarifier or a CS (Custom select) function. The operator
may assign favorite functions to the MPVD that can then be operated with one touch. The ring can be
used to adjust important functions without releasing your hand from the Main Dial. This feature can be a
great convenience in the ever-changing shortwave radio communications.
Reliable High-output Final Amplifier Stage
The final amplifier utilizes a pair of RD100HHF1 transistors in a push-pull RF arrangement that delivers
100 watts of low-distortion, high-quality transmitter power.
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