TX LO (altvoltage1) is now powered down on RX and enabled on PTT, instead
of staying on continuously. Removes the TX carrier leakage that showed up
at the VFO frequency in the RX spectrum (and persisted after MOX), and
stops idle TX-LO radiation. ApplyTxLO sets powerdown from FTransmitting,
which also recovers the LO if external software (e.g. SDR Console) left it
powered down. RX LO (altvoltage0) is kept on — receive is continuous; QO-100
full-duplex still works (RX LO separate).
Trade-off: re-enabling the TX LO re-runs the AD9361 synth calibration
(a few ms), so the first syllable on SSB may be slightly clipped.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Replaced linear interpolation upsampling (192k→device-rate) with a
polyphase FIR interpolator ×L. Prototype: windowed-sinc lowpass (Blackman,
~-58 dB sidelobes), TAPS*L long, cutoff TX_FIR_CUT=40k, normalized to unity
per-phase DC gain (loudness unchanged). Images at multiples of 192k are now
suppressed ~-58 dB instead of only sinc², cleaning up the uplink spectrum.
BuildTxResampler designs coefficients per FTxRatio in StartTX; FTxDlI/Q
delay line persists across SendDUCIQ calls, reset on StartTX/ClearDUCIQQueue.
Removed FTxPrevI/Q.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Fixed 4096-pair TX buffer was too small for full-duplex above ~1 Msps
("not enough ... samples getting dropped" per SoapyPlutoSDR), causing
clicks/dropouts. Now sized as round(rate/60) rounded up to a power of 2,
clamped [4096..65536] (576k→16384, 1536k→32768). FIFO cushion (~4 buffers)
resizes to match in StartTX.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- Status bar / web now show Pluto/LibreSDR model + serial instead of
"Unknown Board" (BoardDisplayName in controller; UI just renders it).
- Field 3 shows AD936x chip temperature + RX RSSI for Pluto (no PA →
Supply only for openHPSDR). Polled via backend.ReadTelemetry (~2 Hz),
filtered for sensor glitches (plausibility window + slew-limit, with
anti-stick) — fixes rare bogus -15°C readings.
- Add libiio binding iio_channel_attr_read_double.
- Remove stale root pluto_integration.MD (superseded by
doc/PLUTO_INTEGRATION_PLAN.md).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
- RX hw-gain (Pluto/AD936x): backend SetRxGain(ModeIdx, GainDb) — gain_control_mode
(manual/fast_attack/slow_attack/hybrid) + hardwaregain. Controller FRxGainMode/
FRxGainDb, commands SetRxGainMode/SetRxGain/RxGainBy, rfRxGain event, snapshot,
applied in StartRunning. Persisted per-device (rx_gain_mode/rx_gain_db). HPSDR
unaffected (backend no-op).
- UI: separate "RF AGC" panel below the (unchanged) WDSP AGC block, shown only for
Pluto — FAST/SLOW/HYB/MAN mode buttons + manual GAIN slider. LayoutLeftPanel
reflows lower panels via RelayoutBelowBands; no layout shift on HPSDR.
- Cold-init fix: direct sampling_frequency write doesn't load the AD9361 FIR
decimation filter, so a cold-booted Pluto showed a wide centre spike that didn't
track tuning (worked only after SDR Console pre-initialised it). Add optional
libad9361 binding (dynamic) and call ad9361_set_bb_rate() in ApplySampleRate,
which configures BBPLL + loads the FIR; falls back to direct write if absent.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add ADALM-Pluto / AD9361 support as a second hardware backend alongside
openHPSDR, sharing the WDSP DSP pipeline and the existing controller API
(UI stays decoupled from logic).
- RadioBackend.pas: abstract TRadioBackend + TBackendCaps + TRadioDevice
(Kind/URI/Serial). THPSDRNetwork now derives from it (state via virtual
getters); TRadioController.FNetwork is the base type.
- IIOBindings.pas: dynamic libiio loader (runs without libiio present).
- PlutoBackend.pas: scan/probe-by-URI, connect, LO/rate/bandwidth/gain
control, RX streaming thread (int16->24bit BE -> OnDDCIQ), Q conjugated
to match WDSP IQ convention. Verified on LibreSDR (AD9361) over network.
- Unified discovery: TDiscoverThread scans both backends; network Plutos
found via direct ProbeURI (no mDNS needed). ConnectDevice dispatches by
Dev.Kind (EnsureBackend swaps backend, preserving callbacks).
- DeviceStore/DeviceForm: persist Kind/URI/Serial; save Pluto via
AddSavedPluto so saved/autostart devices reconnect across restarts.
- VHF/UHF band plan (BoardUtils, kind-aware): 6m..ADS-B for Pluto; fixes
HF clamps (band detect, mouse-wheel 60 MHz cap, freq-display max).
- SampleRateOverlay: configurable presets (Pluto 576k..5760k, >520 ksps),
auto-width to fit.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
ew8bakandClaude Opus 4.8