Fine-tune the C1/L/C2 relays with the mousewheel¶
After an autotune, you can nudge the C1, L, and C2 relay bank positions one step at a time using the mousewheel. This lets you manually walk the tuner through adjacent relay positions to chase a lower SWR without triggering a full retune.
Before you start¶
- A Tuner Genius XL (TGXL) must be detected by AetherSDR. The Tuner applet is hidden until that happens.
- A direct TGXL connection must be active. Mousewheel scrolling on the relay bars is disabled when AetherSDR is communicating with the TGXL only through the radio (non-direct mode).
- Open the Tuner applet by clicking the TUN tray button on the right sidebar.
Steps¶
- Confirm the Tuner applet is visible. If not, click the TUN tray button.
- Verify a direct TGXL connection is active. If the relay bars do not respond to scrolling, the direct connection is not established — see Tuner overview.
- Position your mouse cursor over the C1 bar.
- Scroll the mousewheel up to increase the C1 relay position by one step, or down to decrease it by one step.
- Repeat on the L bar to adjust the inductance relay bank.
- Repeat on the C2 bar to adjust the second capacitor relay bank.
- Watch the SWR gauge after each step to assess the effect.
What each control does¶
| Control | What it shows | Valid range | Default | Setting key |
|---|---|---|---|---|
| C1 | C1 relay bank position | 0–255 | 0 | — |
| L | L relay bank position | 0–255 | 0 | — |
| C2 | C2 relay bank position | 0–255 | 0 | — |
| SWR | TGXL-reported SWR | 1.0–3.0 (red above 2.5) | — | — |
Tips¶
- Scrolling adjusts the relay position one step per wheel detent. There is no coarse/fine mode; each scroll event sends one increment or decrement to the TGXL.
- If you want to return to a known-good position, run a fresh autotune using the TUNE button rather than stepping back manually.
Troubleshooting¶
- Scrolling the mousewheel over a relay bar does nothing — The direct TGXL connection is not active. Mousewheel scroll is enabled only when the direct connection is present. Check the connection state in the Tuner overview.
- Relay bar values change but SWR does not update — The SWR gauge reflects TGXL-reported values via the direct connection. If the meter is frozen, the direct connection may have dropped.