Connection
Radio DATA (Mini-DIN 6) ↔ audio interface ↔ PC. CAT: ACC (Mini-DIN 8) ↔ compatible CAT interface ↔ PC. Radio CAT is logic-level; do not wire directly to RS-232C.
Digirig Mobile
Use Digirig Mobile 1.6+ in logic-level configuration. PC↔Digirig USB; black AUDIO↔DATA Mini-DIN6; green SERIAL↔ACC Mini-DIN8 with FT-8xx cables. Distinguish CI-V/RS-232C versions.
SCU-17 + CT-62
PC↔SCU-17 USB. Audio: SCU-17 DATA↔radio DATA using the supplied matching cable. CAT: SCU-17 CAT/RS-232C↔CT-62↔radio ACC. CT-62 converts electrical levels; a passive Mini-DIN adapter is not a substitute. Adjust TX/RX knobs.
Radio settings · AFSK
Hold F → select item with SEL → change with DIAL → hold F to save. Select DIG with MODE; set DIG MODE to USER-L.
| Item | Setting / check |
|---|---|
| Mode | DIG |
| 26 DIG MODE | USER-L: LSB side of DIG. After connecting, check this menu as well as the DIG display. |
| 25 DIG MIC | Default 50 (0–100). Keep working FT8 gain; adjust with interface TX and PSRTTY volume. Separate from SSB MIC GAIN and FM packet PKT MIC. |
| 24 DIG DISP / 27 DIG SHIFT | Record existing FT8 values. Shared USER-L/USER-U display/carrier offsets. For a new setup, start at 0Hz and verify actual TX frequency. |
| 14 CAT RATE | Match PSRTTY baud; start with the working FT8 rate. |
| NAR / RX filter | Start with NAR OFF and a wide RX filter. Pass both 2085/2295Hz tones before narrowing. |
| DATA OUT 1200bps / RX audio | Use a matching cable taking RX audio from DATA 1200bps output (pin5), GND(pin2), not the 9600bps output. Adjust level at interface RX and Windows/PSRTTY. |
FSK keying transmission · Ver1.18
Example: DTR for FSK and CI-V/CAT for PTT. Adjust settings to your wiring and selected signals.
The manufacturer manual specifies AFSK operation for this model. Native direct FSK keying is not supported; use normal AFSK mode.
Manufacturer reference: manual / USB port settings (FT-818ND)
If FT8 already works
If FT8 works with DIG+USER-U, keep DATA cable, audio device and DIG gain. PSRTTY uses DIG+USER-L; restore USER-U for FT8. Plain USB with microphone-jack audio is a different path; do not apply this DATA-jack guide unchanged.
PSRTTY settings · AFSK
Select FT-818ND, Hamlib and CAT PTT. Use Digirig CAT COM or SCU-17 Enhanced COM, matching baud. Specify interface Audio IN/OUT. Close FT8, test connection; check DIG and DIG MODE USER-L. If switching fails, set DIG+USER-L manually and disable connection auto-switch.
No modulation
TX but no audio: DIG → USER-L → interface Audio OUT → DATA cable → DIG gain/TX level. Missing RX: 1200bps audio-output cable, Audio IN/RX gain. CAT fails: check jack selection, electrical cable type, COM/baud.
Official sources
- FT-818ND 取扱説明書
- FT-818ND Manufacturer Manual (archived copy)
- Digirig FT-8xx Cable Set — logic-level CAT
- SCU-17 Manual — CT-62 / FT-817ND / FT-857D
Based on official manufacturer operating/CAT manuals. Names and positions may vary by firmware/region.