This circuit configuration is different from a generic PLL that generates a local signal.
YAESU PROGRAMMING SOFTWARE FOR FTM 100 SD CARD SERIES
The local circuit of the FTDX101 series uses the 400 MHz HRDDS (High Resolution Direct Digital Synthesizer) method that was used in the FTDX5000. The C/N ratio (signal-to-noise ratio) of the local signal injected into the 1st mixer is an important factor in improving the proximity multi-signal characteristics. Ultra Low-Noise Local Oscillator System 400MHz HRDDS (High Resolution Direct Digital Synthesizer)
Therefore, interference is reduced making it is possible to continue to operate even under such difficult conditions. This reduces the signal load on the A/D converter which is a bottleneck from the viewpoint of the entire receiving circuit. If there is a powerful AM station near your location or in challenging operating situations where there are a lot of strong signals in the band from Contests, DX-pedition activities, those signals outside the pass band can be attenuated by the very effective roofing filter in the front stage of the A/D converter. 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. The FT DX 101 series uses a hybrid SDR configuration that integrates a direct sampling SDR receiver in order to view the entire band status in real time, with the excellent dynamic receiver performance achieved by the narrow band SDR receiver circuit.īy using this hybrid SDR design, the overall performance of the entire FTDX101 receiver system is improved. The Narrow band SDR receiver removes strong out of band signals by using a superheterodyne method, with narrow band roofing filters which significantly attenuates unwanted out of band frequency components, and the wanted signals within the passband are converted to digital by a high resolution 18-bit A/D converter and sent to an FPGA (Field Programmable Gate Array) for signal processing. Digital Processing Generated Real-Time Spectrum Scope.Emphasises Excellent Receiver Performance and Hybrid SDR Functionality.In addition to IF down-conversion, The FTDX101 receivers implement the YAESU legendary powerful RF Front-Ends, outstanding low-noise Local Oscillators, roofing filters with sharp shape factors, and the latest circuit configurations that we carefully selected for all circuit elements.Ĭonsequently, 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. This achieves the amazing multi-signal receiving performance when confronted with the most challenging on-the-air interference situations. Narrow band SDR configuration makes it possible to use the narrow bandwidth crystal roofing filters that have the sharp shape factor. 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.
The Down Conversion type receiver construction is similar to the FTDX5000. *300Hz and 1.2kHz roofing filters (Optional)Ĭrystal Roofing Filters produce phenomenal Multi-signal characteristics In addition to the Narrow band SDR receiver, that boasts overwhelming Basic Performance, the Hybrid Configuration Digital Processing with Direct Sampling SDR permits inclusion of the superb Real-Time Spectrum Scope.
400MHz HRDDS (High Resolution Direct Digital Synthesizer).Hybrid SDRs (Narrow Band SDR & Direct Sampling SDR) Raising and meeting the goal is the ultimate mission that Yaesu has challenged for over 60 years. We believe that hearing a weak target signal in an environment of close strong interference is the most important feat required of HF DX communications equipment in every era. The Ultimate HF/50MHz/70MHz transceiver.In Homage to Yaesu Founder - Sako Hasegawa JA1MP.Named after the well-known FT-101, a corner stone in the history of HF Transceivers,Ĭreate the future of HF communications with the birth of the FTDX101. the FTdx101D has gone straight to the top of the Sherwood transceiver performance charts, what better reason to own one?