Yaesu FT-857D Operating Manual
Also see for FT-857 series: ManualTechnical supplementOperation manualBrochure & specsTechnical supplement
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Contents
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33FT-857 Operating ManualDATA JackThis 6-pin, mini-DIN jack accepts AFSK input from a Ter-minal Node Controller (TNC); it also provides fixed-levelReceiver Audio Output, Push-To-Talk (PTT), Squelch Sta-tus, and ground lines.ACC JackThis 3.5-mm 3-pin jack accepts external ALC (Automatic Level Control) voltage froma linear amplifier on the tip connection, and accepts a “Transmit Request” command onthe ring connection. The main shaft is the ground return.The “TX Request” connection, when shorted to ground, puts the FT-857 into the transmit mode, and sends out a steady CW carrier, forlinear amplifier or manual antenna tuner adjustment.KEY JackThis 3.5-mm, 3-pin jack is used for connection to a CW keyer paddle or a straight key.EXT SPKR JackThis 3.5-mm, 2-pin jack provides variable audio output for an external speaker. Theaudio output impedance at this jack is 4 W ~ 16 W and the level variesaccording to the setting of the front panel’s AF control.144/430 MHz Antenna JackConnect your 144 and/or 430 MHz antenna’s 50 W coaxial cable to this M-type (“SO-239”) connector.HF/50 MHz Antenna JackConnect your HF and/or 50 MHz antenna’s 50 W coaxial cable to this M-type (“SO-239”) connector.REAR PANEL CONNECTORSDATADATA OUT1200bpsDATA OUT9600bpsSQLGNDPTTDATA INEXT ALC GNDTX REQSIGNAL GNDCOMMONCOMMONDOTDOT DASHDASHKEY GNDGNDKEY |
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