STACKED LIVE WORKSPACES
Every receiver gets its own spectrum, band plan, waterfall, signal meter, tuning state, hold controls, and focus mode.
MULTI-RECEIVER SPECTRUM WORKSTATION
SPECTER SDR
SCAN WITH FIVE RADIOS AT ONCE.
Turn one to eight RTL-SDR receivers into a coordinated Windows radio array. Partition channel scans across every radio, hold on simultaneous signals, manage frequency libraries, capture and replay raw IQ, decode live traffic, connect remote receivers, and feed external radio tools.
1-8RECEIVERS
5XARRAY SCAN
5BUILT-IN DECODERS
$199ONE TIME
LIVE ARRAY // FIVE RECEIVERSLOCAL PROCESSING
// ONE RADIO DESK, EVERY RECEIVER
Stop operating your array one dongle at a time.
SPECTER SDR treats every connected receiver as part of one instrument. Each radio keeps its own tuning, gain, antenna role, bearing, squelch, DSP calibration, waveform holds, and recording tracks while the workstation gives you one synchronized operational view.
// CORE CAPABILITIES
A complete spectrum operations desk.
Real controls, real local processing, and a workflow built for long monitoring sessions rather than quick single-radio checks.
FULL DEMODULATION
NFM, WFM, AM, DSB, LSB, USB, CW, and RAW modes with bandwidth, filter, shift, gain, squelch, and calibration controls.
ARRAY CORRELATION
Compare simultaneous events across antennas, infer direction from amplitude relationships, and flag movement across the array.
WAVEFORM HOLDS
Define frequency ranges and dB-over-floor thresholds per receiver, preserve peaks, and clear individual or array-wide holds.
MULTI-CHANNEL AUDIO
Hear every active receiver through one mixer with channel volume, mute, solo, live meters, and a master output.
QUALIFIED ALERTS
Build Notice, Alert, and Critical classes by threshold and band, then capture synchronized waveform evidence when they fire.
AGGREGATE FULL-RANGE VIEW
Split 24-1766 MHz across the connected array and stitch each receiver slice into one faster combined spectrum and waterfall.
GPU DISPLAY ENGINE
Render spectrum interpolation and waterfall palettes through WebGL2, with automatic high-performance canvas fallback.
// ARRAY SQUELCH SCANNER
Five radios sweep five times faster and hold on five signals at once.
Choose a frequency range or a saved channel group. SPECTER SDR partitions the work across the connected array, attributes every hit to the receiver that heard it, and leaves a dedicated ADS-B radio untouched.
PARTITION
Split contiguous ranges or saved channel groups across every available receiver.
HOLD
Pause each radio independently while active transmissions remain above the configured floor.
PRIORITIZE
Revisit priority channels, skip current activity, and persist nuisance-frequency lockouts.
LOG
Store time, frequency, strength, duration, detected CTCSS tone, and receiver identity.
// CAPTURE + CONNECT + CONTROL
A complete radio desk that works with the rest of your toolchain.
Move frequency lists, raw signal recordings, remote radios, aircraft data, audio, and tuning commands through established radio formats and protocols.
FREQUENCY MANAGER
Search and group named frequencies, tune on double-click, and import or export CSV lists.
CTCSS DETECT + SQUELCH
Detect all 38 standard PL tones, filter NFM audio by tone, and stamp tones onto scanner hits.
SIGMF IQ CAPTURE
Record gapless cu8 baseband, then replay cu8 or cf32 files at real-time pace with metadata restored.
REMOTE RTL_TCP RADIOS
Add roof, field, or network receivers as full array elements with forwarded tuning and gain controls.
SBS + ICECAST OUTPUT
Feed decoded aircraft over BaseStation TCP and stream a receiver's MP3 audio to an Icecast mount.
RIGCTL CONTROL
Let hamlib-compatible software read and retune a chosen SPECTER receiver through a standard TCP endpoint.
// DECODER LAB
Decode the signal before you call it unknown.
Decoder Lab validates Mode-S and ADS-B aircraft telemetry, AX.25 and APRS packets, POCSAG paging, and NOAA SAME weather alerts through five built-in profiles. Supported live engines add rtl_433 devices, AIS Marine, DSD-FME digital-voice events, and NOAA APT processing.
- Five built-in live protocol profiles with checksum or frame validation
- Source, destination, payload summary, frequency, receiver, and time
- Pinned one-click installation for supported live decoder engines
- Engine packets flow into the same receiver-tagged live feed
MODE-S / ADS-BDECODED
UAL218 · ICAO A4B921
1090.000000 MHz · ALT 28,900 FT · 446 KT · HDG 071°
AX.25 / APRSVALID FCS
N0CALL-1 → APRS
144.390000 MHz · POSITION / STATUS FRAME
NOAA SAME WEATHERVALID HEADER
WEATHER ALERT FRAME
162.550000 MHz · ORIGINATOR / EVENT / LOCATION
// INSIDE THE WORKSTATION
Move from the radio wall to directional and automated analysis.
The same receiver array powers the Rosebud radial display and Research Labs without leaving the local workstation.
// ROSEBUD ARRAY VIEW
Turn separate antennas into one directional display.
Assign names, physical slots, antenna types, and bearings, then move the array to a dedicated Rosebud window or second display. One receiver renders as a full 360-degree waterfall; larger arrays add comparative direction and confidence.
- One to eight receiver layouts
- Omnidirectional, directional, and vertical reference roles
- Inferred bearing and movement indicators
- Touch and stylus annotation with PNG export
72°INFERRED
NESW
// SYNCHRONIZED EVIDENCE
Record the session, not just the moment.
CAPTURE
Record one workspace or Rosebud composite, lossless timestamped spectrum tracks, and per-receiver BWF audio without spawning one video encoder per dongle.
FLAG
Drop event markers during the run. Alert classes automatically preserve frequency-labeled waveforms and synchronized array views.
REVIEW
Replay post-roll clips, navigate the timeline, export selected ranges, and open the exact saved Gallery event from the alert dialog.
REPORT
Generate printable HTML and PDF alert reports with signal metadata, session context, and embedded spectrum and waterfall evidence.
// 1090 MHZ ADS-B
Keep aircraft context beside the spectrum.
Reserve one receiver for continuous ADS-B monitoring or let periodic mode borrow an assigned radio for a 10-second check every minute. Traffic extends the window to 15 seconds, then the receiver returns to its previous tuning automatically.
- OpenStreetMap view with cursor zoom, pan, trails, and persistent manual framing
- Callsign, ICAO, altitude, heading, speed, and position-pending contacts
- Dedicated and periodic receiver modes
- New-contact and persistent emergency-state alerts
- Windows location support with manual coordinate fallback
// OPT-IN ADVANCED RESEARCH
Automate the search. Preserve the reasoning.
Research Labs stays out of the normal workflow until enabled. When active, it learns the local RF environment, distributes search bands across available radios, and checks qualified events against ordinary explanations.
ADAPTIVE BASELINE
Learns each receiver's normal spectrum and flags explainable novelty, chirps, Doppler-like drift, hopping behavior, periodic bursts, and wideband events.
MULTI-RADIO SURVEY
Assigns aerospace, digital discovery, or wide survey ranges across idle receivers, alternates sweep direction, and restores saved tuning when stopped.
CONTEXT CHECKS
Compares findings with known protocol bands, live aircraft, visible satellites, array confirmation, bearing, and apparent movement before assigning a review status.
A research score is an evidence-prioritization value, not a probability and not a claim about an object's identity or cause.
// LOCAL FIRST
Your radios and recordings stay on your machine.
No cloud service is required for receiver control, decoding, pattern analysis, alerting, correlation, recording, reports, or the local evidence library. Optional map tiles and satellite catalog updates use OpenStreetMap and CelesTrak when those features are requested. SPECTER Imaging integration is optional and limited to local alert and trigger handoff.
// HARDWARE
Start with one receiver. Build to eight.
WINDOWSWindows 10 or 11, 64-bit
RADIOSOne to eight RTL-SDR compatible receivers
USBPowered hubs recommended for multi-radio arrays
ANTENNASMatched antennas and feed lines recommended for correlation
// LICENSING
Permanent workstation license.
No subscription and no required cloud service.
SPECTER SDR$199one time
- Complete one to eight receiver workstation
- All demodulation and DSP controls
- Built-in and supported live-engine protocol decoding
- Array scanner, Frequency Manager, CTCSS, and hit log
- SigMF IQ capture/replay and remote rtl_tcp receivers
- SBS, Icecast, and rigctl network interoperability
- Pattern Hunter, Search Director, and Skywatch correlation
- Rosebud array and second-display modes
- Continuous recording and event capture
- ADS-B dedicated and periodic monitoring
- Local Gallery, replay, export, and reports
- Optional local SPECTER Imaging integration