SSTV.org.ukReceiver bench material
Start with a known signal before diagnosing a weak radio path. These downloads state their sample rate, signal domain and payload so a successful frame decode is not mistaken for a recovered image.
FLAC compresses the waveform losslessly. PCM16 WAV is provided for receivers that expect WAV input. For Mode E, keep both I/Q channels at 192 kHz; do not downmix, normalize the channels independently or resample to an audio-only format. The raw SSDV I/Q fixture uses 96 kHz signed little-endian 16-bit I,Q pairs and a +3200 Hz carrier offset.
The complete SSDV and DRM samples carry the digital test-card JPEG. Transport-only fixtures carry short telemetry or framing examples. The grayscale Weather Fax strip contains no operational weather information.
The FEC and no-FEC samples are complete images, with all generated AX.25/SSDV packets recovered and the JPEG reconstructed by the same codec library. Other link fixtures identify their test payload explicitly. Read the transport reference.
The complete digital test card carried in AX.25/SSDV packets.
48,000 samples/s · 1 channel · 126.67 s
Lossless FLACPCM16 WAVSSDV packetsReconstructed JPEG
All AX.25/SSDV packets recovered from generated WAV; JPEG reconstructed.
The complete digital test card carried in AX.25/SSDV packets.
48,000 samples/s · 1 channel · 108.80 s
Lossless FLACPCM16 WAVSSDV packetsReconstructed JPEG
All AX.25/SSDV packets recovered from generated WAV; JPEG reconstructed.
AX.25 test frame carrying NATIVE9K6FIXTURE; no image payload.
48,000 samples/s · 1 channel · 0.04 s
Generated by the pinned library's native transport fixture generator.
A coded 256-byte test telemetry frame; no image payload.
48,000 samples/s · 1 channel · 4.33 s
Generated by the pinned library's native transport fixture generator.
An IL2P frame carrying TEMP=21.4,V=8.1 telemetry; no image payload.
48,000 samples/s · 1 channel · 0.23 s
Generated by the pinned library's native transport fixture generator.
Telemetry plus the first SSDV packet only; an incomplete image example.
48,000 samples/s · 1 channel · 3.03 s
Generated by the pinned library's native transport fixture generator.
Interleaved signed PCM16 little-endian I,Q pairs; AX.25 test payload, no complete image.
96,000 samples/s · 2 channels
Complex I/Q data. Import as I/Q with the listed sample rate and I,Q channel order; speaker playback is not a decode preview.
Generated by the pinned native transport fixture generator.
Modes A-D use a 10 kHz occupancy, 48 kHz mono PCM and 12 kHz real IF. Mode E uses the 100 kHz DRM+ profile and 192 kHz stereo I/Q. All five carry an MOT image object. These waveforms were generated with the transmitter library pinned in SSTV 2.0; the manifest distinguishes generation checks from receiver recovery evidence.
The digital test-card JPEG carried in a DRM MOT image service.
48,000 samples/s · 1 channel · 24.00 s
Generated by the SSTV 2.0 pinned transmitter library; PCM16 WAV verified by its writer.
The digital test-card JPEG carried in a DRM MOT image service.
48,000 samples/s · 1 channel · 24.00 s
Generated by the SSTV 2.0 pinned transmitter library; PCM16 WAV verified by its writer.
The digital test-card JPEG carried in a DRM MOT image service.
48,000 samples/s · 1 channel · 51.60 s
Generated by the SSTV 2.0 pinned transmitter library; PCM16 WAV verified by its writer.
The digital test-card JPEG carried in a DRM MOT image service.
48,000 samples/s · 1 channel · 51.60 s
Generated by the SSTV 2.0 pinned transmitter library; PCM16 WAV verified by its writer.
The digital test-card JPEG carried in a DRM MOT image service.
192,000 samples/s · 2 channels · 24.00 s
Complex I/Q data. Import as I/Q with the listed sample rate and I,Q channel order; speaker playback is not a decode preview.
Generated by the SSTV 2.0 pinned transmitter library; PCM16 WAV verified by its writer.
Use IOC 576 and width 576 for these 32-line samples, selecting the stated LPM. The image-only strips contain 1500 Hz black and 2300 Hz white tones. Read the timing and tuning reference.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 32.00 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 21.33 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 19.20 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 16.00 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 10.67 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
Synthetic grayscale calibration strip. Image rows only; no start, phasing or stop sequence. Not a weather forecast.
48,000 samples/s · 1 channel · 8.00 s
Generated at 1500 Hz black and 2300 Hz white with a continuous phase and exact configured line length.
The analog mode spec sheet links each mode's raster-matched test card, lossless waveform and available receiver loopback result. Reference-only historical modes remain separate from app-supported modes.
The digital samples use RadioSignalKit revision de358741cb785d86f917c4bf4ffca13874a8cae0, the revision pinned by the 2.0 release. The generator and Swift helper are retained with the website source. The public manifest records waveform and packet hashes, duration, sample format and the precise validation performed for each item.
