The ring has the traditional Yaesu outstanding smooth and solid feeling when used.Raising and meeting the goal is the ultimate mission that Yaesu has challenged for over 60 years.
The first IF frequency is 9 MHz, and a low noise figure dual gate MOS FET, D-quad DBM (Double Balanced Mixer) with excellent intermodulation characteristics, is implemented in the mixer section. ![]() This achieves the amazing multi-signal receiving performance when confronted with the most challenging on-the-air interference situations. Consequently, the proximity BDR (Blocking Dynamic Range) in the 14 MHz band reaches 150 dB or more, the RMDR (Reciprocal Mixing Dynamic range) reaches 123 dB or more, and the 3rd IMDR (third-order Intermodulation Dynamic Range) reaches 110 dB or more. The Direct Sampling SDR driving the real time Spectrum display with its large dynamic range enables the weakest signal to be observed on the display when it appears and the Narrow Band SDR enables that signal to be selected, filtered and then decoded. This reduces the signal load on the AD converter which is a bottleneck from the viewpoint of the entire receiving circuit. Therefore, interference is reduced making it is possible to continue to operate even under such difficult conditions. Ft 897 Control Software Series Uses TheThe local circuit of the FTDX101 series uses the 400 MHz HRDDS (High Resolution Direct Digital Synthesizer) method that was used in the FTDX5000. This circuit configuration is different from a generic PLL that generates a local signal. Creating the local signal by directly dividing the high frequency of 400 MHz, the theoretical PLL lockup time becomes zero, and CN deterioration by the lockup time does not occur. As a result, the phase noise characteristic of the local signal achieves an excellent value of -150 dBcHz or less at 2kHz separation. Using a remarkable miniaturization design while producing unparalleled characteristics and maximum attenuation of -70 dB. The conventional preset method of switching coils and capacitors with relays is eliminated. ![]() In a generic circuit, noise or distortion may occur depending on the circuit configuration and the components, up to the final stage that is producing the transmit signal, even if the local signal is of high quality. In the FTDX101, a thorough examination of each element up to the final TX stage was made. The clock that divides and distributes the local signal from the 400MHz HRDDS circuit to each block, as well as the FPGA, DA converter, the final power amplifier etc., and carefully selecting the latest circuit configurations to improve the CN characteristics of the entire transmitter block. The transmit signal of the FTDX101 is directly generated from a 16-bit DA converter without passing through a mixer circuit, therefore distortion and noise are significantly suppressed. FTDX101 transceiver user will appreciate the finest performance with a high-purity transmission signal. At the status of transmission, the LED turns red so you can instantly confirm which VFO is transmitting. Below the band key is a key for selection between transmission and reception of the MAIN and SUB band, and below that, there is a switching key for using the VFO knob on the MAIN or SUB tuning, so, even when the operating split using both MAIN and SUB bands at the same time, the band control can be performed smoothly, and so tuning the wrong band by mistake is reduced. The ring allows control of SUB VFO frequency dial, VC-TUNE, Clarifier and CS (custom select function). The MPVD is a handy dial that allows you to adjust important functions in ever-changing HF communications without taking your hand off the VFO.
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