Click on spectrum/waterfall no longer sets localCenter immediately.
The filter passband now appears exactly at the clicked pixel instead of
jumping to screen center. Server's center_hz (arrives ~200ms later)
naturally re-centers the display once fresh spectrum data is ready.
VFO display wheel (vDispA/vDispB) now updates localCenter when tuning
the active VFO. Previously localCenter lagged behind, causing applyState
to teleport the filter back to center every 200ms (the "passes through
center" oscillation).
Spectrum canvas wheel (doWheel) is unchanged: user expects the spectrum
to scroll when wheel-scrolling over it, filter stays at center — correct.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add freq_a command: sets VFO A regardless of active VFO; fixes A=B and
SWAP when VFO B is active (prev. sent freq_b which overwrote wrong VFO)
- Add pend("freq") to B=A / A=B / SWAP to guard local display during round-trip
- RX step attenuator: HPSDRNetwork.SetStepAtten → bytes 1442/1443 in HP packet;
WebServer attn command; MainForm FAtten + SyncWebAttn; attSel.onchange in JS
- TUN mode: set_tun WebSocket command wired to ApplyTUN(); toneBtn toggles
with on/off highlight and pending protection; tuning field in state JSON
- FNP button opens semi-transparent filter overlay (10 buttons, 5×2 grid)
with mode-appropriate widths (SSB/CW/AM/FM); active filter highlighted;
cur.filter_bw updated immediately on click so passband redraws within 50ms
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ew8bakandClaude Sonnet 4.6