# Yaesu (native CAT)

A native backend talks to an **FTDX10 / FTDX101** (and close relatives) directly
over the rig's USB/serial port — no OmniRig. Pick **Yaesu (USB)** in
Settings → CAT: COM port + baud (FTDX10/101 default 38400).

Frequency, mode, VFO A/B (MAIN/SUB on the 101), split and PTT are covered, and
OpsLog **follows the VFO you are actually on** — the displayed frequency, the
logged frequency and the VFO a cluster spot tunes. Split is worked out from
which VFO transmits, so simplex on the SUB receiver is not shown as split.

## The Yaesu console

With the native backend connected, a console tab (and a Main-view pane) gives:

- **S / PO / SWR meters** — power in watts on a curve measured against the rig's
  own display, SWR as the ratio itself, with peak-hold so they stay readable
  between CW words or SSB syllables.
- **Band and mode buttons** — CW, RTTY, DIGI and PSK show their sideband; click
  the active button again to switch it.
- AF / RF / squelch, AGC, IPO–AMP1–AMP2, 6/12/18 dB attenuator, NB, DNR, narrow
  filter, power, mic gain, VOX, split and **ATU tune**.
- **SPLIT** places the transmit VFO up 1 kHz on CW/data, up 5 kHz on phone.
- In CW the mic gain and VOX give way to a **CW card**: keyer speed, break-in
  and ZIN (zero-in).

Sliders only respond to the mouse wheel after you click them, so scrolling the
panel can't change the transmit power by accident.

## CW with the rig's own keyer

A CW engine sends your macros with the radio's internal keyer (CAT `KY`) — no
WinKeyer, no second cable. Pick **Yaesu (rig keyer)** in Settings → CW keyer.

- Works on the **FTDX101 / FT-991A / FT-710** family.
- An **FTDX10 does not accept it** (`KY` is refused, `DAKY` doesn't help) —
  OpsLog says so and points to the **serial DTR keyer** on the rig's second COM
  port (the *Serial port* CW engine), which works. See [[Audio and Keyers]].
- CW speed is one setting everywhere: the console slider, the CW panel and the
  rig's front panel stay in agreement.

## Notes

- A Yaesu that is switched off is reported as such (opening the port is not
  "connected").
- If your interface goes into transmit the moment OpsLog connects, enable the
  **lower DTR/RTS on connect** option — see [[CAT Control]].