#Yaesu fc 30 antenna tuner serial
Serial is normal UART (idle high 5v) 4800bps 8N1.Radio detects presence of tuner based on Sense pulled to GND and also tuner sends serial data after being turned on. TX INH (Tx inhibit, pulled low by tuner to inhibit tx)īefore you connect the tuner you need to select menu 16-15 TUNER SELECT = EXTERNAL, then you need to switch of radio, connect tuner and switchb it on.Reset (this is held high by the radio when on).Sense (this is connected to GND in the tuner, most likely for detection).+13V OUT (not fused I’ve heard, so be careful).Designed specifically to mount to the FT-897 HF/VHF/UHF transceiver, FC-30 antenna tuners include a cooling fan to ensure thermal stability of the critical matching elements within its compact case. Cable is straight through (meaning TX D/RX D are swapped in the tuner) FC-30 Automatic Antenna Tuner, which will present a 50 impedance to your transceiver on the 1.8 50 MHz bands so long as the SWR on the coaxial line. Yaesu FC-30 Automatic Antenna Tuners respond to control commands from the FT-897 Transceiver, providing microprocessor-based impedance matching on the 160 through 6 meter Amateur bands.The TX INH line is used to supress RF while switching the tuning circuit in/out. Then the command to start tuning is sent and a lower power carrier is sent.If the SWR is too high the tuner won’t start tuning.
First a command is sent to disengage the tuner, then a a high(er) power carrier is sent to detect SWR.The ultimate goal of this project is to connect an Icom AH-4 tuner to Yaesu radios.ĭata shown is hex. I have not been able to find any information online at all about the propriatry protocol used, so I’m compiling this from my observations. Notes about the Yaesu FC-30 tuner connected to the FT-891 radio.