Changing VFO frequency to 7.16MHz (example).Frequency is transmitted as 4 bit BCD.Command from radio always begins with 0xff.All commands from radio are 4 bytes, with first byte beeing sent about 50ms before the last 3 (wake up?).
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).Cable is straight through (meaning TX D/RX D are swapped in the tuner).Viewing 1 post (of 1 total) Author Posts Augat 9:52 pm 48583 AnonymousInactive. The TX INH line is used to supress RF while switching the tuning circuit in/out. Home Forums Game of Thrones Fc-30 antenna tuner manual Tagged: antenna, Fc-30, Manual, tuner This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by Anonymous. 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.