| Receiver Frontend: General |
V3.2.3 |
V4 |
| Number of simultaneous hardware connections |
3 (one DAB demodulator) |
3 (one DAB demodulator) |
| Hardware Support |
Airspy, RTL-SDR, RSPs |
Airspy, RTL-SDR, RTL-SDR.com V4 (in V4.1.3), 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 |
| Bias-T auto-off (where HW supported, V4.0.5) |
No |
Bias-T is switched off before stopping |
| Gain automatic (AGC), manual |
Yes |
Yes |
| Level Indicator (V4.1.1) |
No |
WFM: SNR, Power; DAB: Power |
| Maximum Spectrum, (V4.0.8) |
No |
Yes |
| Remote Control of Signal Generator, (V4.0.8) |
No |
Available on request. Agilent protocol subset via Virtual COM port. |
| Receiver Frontend: Tuner, Driver supported |
V3.2.3 |
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 |
RTL-SDR, RSPs |
| Fully automatic AGC |
RTL-SDR |
RTL-SDR |
| Hardware register editor |
RTL-SDR |
RTL-SDR |
| Hardware IF sideband selector |
RTL-SDR |
RTL-SDR |
| Driver Selection (Settings, V4.0.8) |
No |
RTL-SDR |
| Notch Filter for DAB and WFM (V4.0.9) |
No |
RSP's |
| Receiver Frontend: Raw Files |
V3.2.3 |
V4 |
| Raw file recorder (arbitary large files) |
Yes |
Yes |
| Raw file player (arbitary large files) |
Yes |
Yes |
| GNSS support on recording and replay |
Yes |
Yes |
| 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 |
| Raw file player: Fast Forward (V4.1.1) |
No |
Factor 2, 4, 8 (No demodulator) |
| Demodulators (without DAB) |
V3.2.3 |
V4 |
| WFM, NFM, AM, SSB, ADS-B |
Yes |
Yes |
| Stereo Decoder |
WFM |
WFM |
| Deemphasis |
NFM, WFM |
NFM, WFM |
| RDS decoding (V4.1.1) |
No |
PI-Code, Station name |
| AM Airband: Channels with standby flip-switch |
Yes |
Yes |
| AM Airband: Correct 8.33kHz handling |
Yes |
Yes |
| Maximum Spectrum for Audio (V4.0.9) |
No |
yes |
| SSB |
USB, LSB |
USB, LSB |
| ADS-B filter |
No |
Altitude, ft/min, distance, heading, velocity |
| ADS-B: Squawk (V4.0.4) |
No |
Yes |
| ADS-B: Ground movement |
When in range |
When in range |
| DAB: Overview |
V3.2.3 |
V4 |
| Decoding Sensitivity |
Good |
Excellent |
| TII Decoding |
Yes |
Yes |
| Map Display |
Yes |
Yes |
| SPI Decoding, parallel with audio |
Yes |
Yes, including EPG |
| Ensemble Overview (GUI table) |
Yes |
Enhanced Features (V4.1.3) |
| Slideshow, Dynamic Label |
Yes |
Slideshow Pictures saveable (V4.0.8) |
| Scanner (GUI configurable) |
Yes |
Yes |
| Various Spectra |
Yes |
Yes |
| DAB: Frequency Control |
V3.2.3 |
V4 |
| Frequency: Coarse deviation allowed (GUI indication) |
< 30kHz |
< 30kHz |
| Frequency: Fine freq. accuracy (GUI indication, selection) |
< 1Hz |
< 1Hz |
| Frequency: Hardware calibration (GUI command, 1ppb V4.0.7) |
1/100 ppm |
1/1000 ppm = 1 ppb (for the SDRplay devices) |
| Frequency: Hardware calibration automatic (V4.0.6) |
No |
Accuracy better than 10Hz (RTL-SDR dongles), better 1Hz (SDRplay devices) |
| Frequency: Sampling freq. error correction (GUI manual / auto) |
Yes |
Yes |
| DAB: Audio |
V3.2.3 |
V4 |
| DAB, DAB+ (AAC decoding in separate app: qirx_audio) |
Yes |
Yes |
| Recorder: WAV, AAC |
Yes |
Yes |
| Mute |
Yes |
Yes |
| Volume control |
No |
Planned |
| Spectrum |
Yes |
Yes |
| DAB: TII |
V3.2.3 |
V4 |
| 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: List on the GUI (V4.1.3 with transmitter names) |
Yes |
Yes, including TII transmitter names |
| TII recording: Manual, automatic when scanning |
Yes |
Yes |
| TII transmitter locations: Ofcom (UK), DABLIST (all except UK) |
Yes |
Yes |
| TII UK transmitter locations selection: DABLIST or Ofcom (V4.0.3) |
No |
Yes |
| TII detection profiles (GUI selectable) |
Adjustable averaging |
Adjustable averaging |
| TII collision resolution (GUI supported) |
Yes |
Yes |
| TII threshold automatic(V4.0.4) |
No |
Yes |
| TII Phase-based detection(V4.0.7) |
No |
Yes, but experimental |
| DAB: SPI (Logos, EPG) |
V3.2.3 |
V4 |
| Logo decoding (GUI: display next to service label) |
Yes |
Yes |
| The same logo more than once in a multiplex allowed (V4.1.3) |
No |
Yes |
| Large logos |
No |
Displayed next to Dynamic Label (V4.0.6) |
| Inter-Mux logos (V4.0.5) |
No |
Logos for services not contained in the collecting mux |
| EPG: Electronic Program Guide |
No |
Where available (e.g. BBC, DLF) |
| Visual Indication of an ongoing collection (V4.0.6) |
No |
Yes, blinking lamps |
| DAB: Measurements |
V3.2.3 |
V4 |
| FIC ok % |
Yes |
Yes |
| Audio ok % |
Yes |
Yes |
| Null Symbol ok |
Yes |
Yes |
| Symbol Time |
Yes |
Yes |
| Frame Time |
Yes |
Yes |
| CNR: Carrier to Noise ratio (V4.0.3) |
No |
Yes |
| BER: Bit Error Ratio for FIC, MSC, RS (V4.0.3) |
No |
Yes |
| MER: Modulation Error Ratio (V4.0.3) |
No |
Yes |
| Bitrate: Pre-Viterbi (V4.2.2) |
No |
Indication in Mux Overview table |
| Bitrate: Post-Viterbi (V4.2.2) |
No |
Indication in Mux Overview table |
| Bitrate: AAC stream inc. XPad (V4.2.2) |
No |
Indication in AAC tab |
| Bitrate: XPad (V4.2.2) |
No |
Indication in AAC tab |
| DAB: Recorders |
V3.2.3 |
V4 |
| Controllable from separate tab (V4.0.3) |
No |
Yes, incl. Raw Recorder |
| Audio Recorder |
Yes, WAV or AAC (no LATM/LOAS) |
Yes, WAV or AAC (LATM/LOAS for correct pitch) |
| TII Recorder (auto-on when scanning) |
Yes |
Yes |
| GNSS Recorder (auto-on when Raw Recording) |
Yes |
Yes, but only when GNSS sensor available |
| PPP-RTK-AdV Recorder (ensemble 5C Germany) (V4.0.3) |
No |
Yes |
| DAB: Database Browser (separate tab V4.2.1) |
V3.2.3 |
V4 |
| Results visible on the map |
No |
Yes |
| Search criteria |
No |
Country, Block, EId, Main Id, Sub Id |
| Text search |
No |
Ensemble name, site name |
| DAB: Spectra |
V3.2.3 |
V4 |
| Constellation: Linear, I/Q |
Yes |
Yes |
| CIR with TII indication and error bars |
Yes |
Yes |
| CIR with TII indication, higher sensitivity (V4.0.6) |
No |
Yes, but still experimental |
| CIR x-axis as Samples, Distance or Time |
Yes |
Yes |
| TII: TIIs selectable in the table |
Yes |
Yes |
| TII: High resolution spectrum for carrier pairs display |
Yes |
Yes |
| Time Domain: Magnitude of I-Data, sync-able with Null Symbol |
Yes |
Yes |
| Time Domain: Time shift up to several 100ms |
Yes |
Yes |
| Audio spectrum |
Yes |
Yes |
| GUI: General |
V3.2.3 |
V4 |
| All parts resizeable |
Yes |
Yes |
| Most GUI settings are persisted |
Yes |
Yes |
| Settings no longer disabled when receiver active (V4.0.4) |
No |
Yes |
| Docking / floating windows support |
No |
Receiver, Map, and DAB items |
| Layout Save and Restore commands |
No |
Yes |
| Layout Reset command |
No |
Yes |
| Table Sorting (V4.1.1) |
Partly |
Columns sorted correctly; Sorting Indication; Realtime Update |
| "Rx active" indication in its receiver tab (V4.0.4) |
No |
Yes |
| GUI: Frontend |
V3.2.3 |
V4 |
| Device Frequency selection numerical |
Yes |
Yes |
| VFO Frequency numerical selection (mouse wheel) |
Yes |
Yes |
| VFO Frequency by click into spectrum |
Yes |
Yes |
| Waterfall, timeline selectable |
Yes |
Yes |
| RF spectrum calibrated (dBuV, dBm) (V4.0.4) |
No |
RTL-SDR, RSPs |
| FFT length |
4,096 ... 2Mio |
4,096 ... 2Mio |
| FFT window |
incl. Flattop |
incl. Flattop |
| GUI: Demodulators (without DAB) |
V3.2.3 |
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 |
| WFM: RDS PI-Code, Station Name (V4.1.1) |
No |
Yes |
| Squelch |
Yes |
Yes |
| Audio spectrum, zoomable (zoom point selection) |
Yes |
Yes |
| Audio spectrum, raw or filtered display |
Yes |
Yes |
| GUI: Map |
V3.2.3 |
V4 |
| Auto-reload of map 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 |
| Center at own position automatically on GNSS connected (V4.0.3) |
No |
Yes |
| DAB: Display all detected or all present TIIs of a multiplex |
Yes |
Yes |
| DAB: Display results of database browser query |
No |
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 |
V3.2.3 |
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 |
