QIRX Features: Version Comparison

Receiver Frontend: General V3.2.2 (free) V4 (free demo, time limited)
Number of simultaneous hardware connections 3 (one DAB demodulator) 3 (one DAB demodulator)
Hardware Support Airspy, RTL-SDR, RSPs Airspy, RTL-SDR, RSPs
Connection to hardware driver TCP/IP only (no direct USB) TCP/IP only (no direct USB)
Remote Frontend, manual or automatic Yes Yes
Three same or different HW receivers, mixed local-remote Yes Yes
Frequency Calibration (DAB xmitter as the reference) Yes Yes
Calibrated Magnitudes (dBm, dBuV) RTL-SDR, RSPs RTL-SDR, RSPs
Software bandpass filter, GUI-selectable Yes Yes
Bias-T (where HW supported) Yes Yes
Gain automatic (AGC), manual Yes Yes
Receiver Frontend: Tuner, Driver supported V3.2.2 V4
Tuner bandpass filter RTL-SDR, RSPs RTl-SDR, RSPs
Gain indication from hardware driver RTL-SDR, RSPs RTL-SDR, RSPs
Overload indication from hardware driver RSPs RSPs
Fully automatic AGC RTL-SDR RTL-SDR
Hardware register editor RTL-SDR RTL-SDR
Hardware IF sideband selector RTL-SDR RTL-SDR
Receiver Frontend: Raw Files V3.2.2 V4
Raw file recorder (arbitary large files) Yes Yes
Raw file player (arbitary large files) Yes Yes
GNSS support on recording and replay RTL-SDR, RSPs RTL-SDR, RSPs
Raw file player: timeline, seekable, pausable Yes Yes
Raw file recorder/player: XML header Yes Yes
Raw file recorder/player: ensemble change on DAB processed Coordinated with DAB GUI Coordinated with DAB GUI
Demodulators (without DAB) V3.2.2 V4
Stereo Decoder WFM WFM
Deemphasis NFM, WFM NFM, WFM
AM Airband: Channels with standby flip-switch Yes Yes
AM Airband: Correct 8.33kHz handling Yes Yes
ADS-B filter No Altitude, ft/min, distance, heading, velocity
ADS-B: Ground movement When in range When in range
DAB: Demodulator and GUI V3.2.2 V4
Frequency: Coarse deviation allowed (GUI indication) > 30kHz > 30kHz
Frequency: Fine freq. accuracy (GUI indication, selection) < 1Hz < 1Hz
Frequency: Hardware calibration (GUI command) 1/100 ppm 1/100 ppm
Frequency: Sampling freq. error correction (GUI manual / auto) Yes Yes
Marginal signals: decoding sensitivity Good Excellent
TII decoding: All TIIs in range of an ensemble Yes Yes
TII decoding: Correlation with CIR (GUI in CIR spectrum) Yes Yes
TII: Display on the map Yes Yes
TII recording: Manual, automatic when scanning Yes Yes
TII transmitter locations: Ofcom (UK), DABLIST (all except UK) Yes Yes
TII detection profiles (GUI selectable) Adjustable averaging Adjustable averaging
TII collision resolution (GUI supported) Yes Yes
Audio recording (GUI: selection, file size, time indication) WAV, AAC (LATM/LOAS) WAV, AAC (LATM/LOAS)
Scanner (GUI configurable) Yes Yes
Slideshow, Dynamic Label Yes Yes
MOT logo decoding (GUI: display next to service label) Yes Yes
EPG decoding (GUI: display all available) No Where available (e.g. BBC, DLF)
BER, MER measurement No Yes
Mute (GUI: command) Yes Yes
Volume control No Planned
Ensemble overview (GUI table) Yes Yes
GUI: General V3.2.2 V4
All parts resizeable Yes Yes
Most GUI settings are persisted Yes Yes
Docking / floating windows support No Receiver, Map, and DAB items
Layout Save and Restore commands No Yes
Layout Reset command No Yes
GUI: Frontend V3.2.2 V4
VFO Frequency numerical selection (mouse wheel) Yes Yes
VFO Frequency by click into spectrum Yes Yes
Waterfall, timeline selectable Yes Yes
Device Frequency numerical selection Yes Yes
FFT length 4,096 ... 2Mio 4,096 ... 2Mio
FFT window incl. Flattop incl. Flattop
GUI: Demodulators (without DAB) V3.2.2 V4
VFO Frequency raster Yes Yes
Graphical bandwidth indication and numerical selection Yes Yes
WFM: Stereo selector and indication Yes Yes
WFM: MPX spectrum Yes Yes
Squelch Yes Yes
Audio spectrum, zoomable (zoom point selection) Yes Yes
Audio spectrum, raw or filtered display Yes Yes
GUI: DAB Spectra V3.2.2 V4
Constellation: Linear, I/Q Yes Yes
Constellation: Single carrier, single symbol No Yes
CIR with TII indication and error bars Yes Yes
TII: TIIs selectable in the table Yes Yes
TII: High resolution spectrum for carrier pairs display Yes Yes
Time Domain: Magnitude or I-Data, sync-able with Null Symbol Yes Yes
Time Domain: Time shift up to several 100ms Yes Yes
Audio spectrum Yes Yes
GUI: Map V3.2.2 V4
Auto-reload of image tiles Yes Yes
Zoom, Pan, Dim Yes Yes
Own position, moveable by drag'n drop Yes Yes
Center at own position option (i.e. moving map when mobile) Yes Yes
TII: Display all detected or all present TIIs of a multiplex Yes Yes
Range rings, km or nautical miles No Yes
ADS-B: Permanent indication of flight id No Yes
ADS-B: Filter, syncronized with table filter No Altitude, ft/min, distance, heading, velocity
ADS-B: Altitude color bar No Yes, in feet
GNSS V3.2.2 V4
Automatic recognition on startup (Virtual COM port) Yes Yes
Display of raw NMEA sentences Yes Yes
Automatic display of own position on the map Yes Yes
Raw recording: Own position continuously stored Yes Yes
Raw replay: Continuous display of own position Yes Yes

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