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A Yaesu FT-891 Radio Tuned to the 10 Meter Band. The Yaesu FT-891 is a HF and 6 meters all mode mobile amateur radio transceiver. The FT-891 was first announced to the public by Yaesu at the 2016 Dayton Hamvention. [1] The radio has 100 watts output on CW, SSB, and FM modulations and 25 watts of output in AM. [2]
Compared with the "fast modes" (JT9E-H), FT8 is significantly more sensitive, has much narrower bandwidth, uses the vertical waterfall, and offers multi-decoding over the full displayed passband. The mode also supports two-pass decoding and use of " a priori (already known) information as it accumulates during a QSO".
FT8 involves 77-bit message blocks transmitted in regular 15-second periods, consisting of 12.64 seconds of transmission time and 2.36 seconds of decode time, giving a digital data rate of 6.09 bits/sec. Source encoding gives an effective message throughput equivalent to about 5 words per minute.
FT-857 FT-857D. The Yaesu FT-857 is one of the smallest MF/HF/VHF/UHF multimode general-coverage amateur radio transceivers. [46] The set is built by the Japanese Vertex Standard Corporation and is sold under the Yaesu brand. [47] The FT-857 is developed on the FT-897 and MARK-V FT-1000MP transceivers. [46]
The System Fusion communication protocol enables devices to analyze an incoming signal and automatically determine if it is using C4FM or conventional FM mode. System Fusion also enables data transfer at full rate with speeds reaching up to 9,600 bits per second. [5] Yaesu is the only company with System Fusion-enabled devices.
Yaesu FT-7 is a rugged, solid state and modular built HF amateur-band radio transceiver, suitable for fixed and for mobile operation. The set was built by the Yaesu Corporation in Japan in the late 1970s and early 1980s.
The FT-1000MP is an amateur radio ("ham") transceiver series, built by Yaesu.It is an "all-mode" set, operating in the high frequency (HF) frequency range. The "MP" suffix in the name was an homage to Sako Hasegawa, the late founder of the company whose callsign was JA1MP, and who heavily influenced the design and feature set built into this radio.
When several separate paths from transmitter to receiver exist, a condition known as multipath, they almost never have exactly the same length so they almost never exhibit the same propagation delay.