
Multi-frequency
Covers L, S, and C Bands
Multi-constellation
GPS | Galileo | GLONASS | QZSS | IRNSS NavIC | S-Band | BeiDou | SBAS
Up to 4 RF channels simultaneously
No phase drift between channels during acquisition or replay

Next-Generation of Record & Playback solution for GNSS signals
Whether developing new components, improving algorithms or working on the integration of an entire receiver system, Echo™ 4RP GNSS Recorder is the perfect fit for your testbed environment.
Echo™ singularity lies in the alliance of SDR (Software Defined Radio) and a state of the art RF Analog front-end.
Top-end processing performance and superior RF quality are now met into a COTS appliance with utmost flexibility in recording control.
Highest-Fidelity
- 4 Rx and Tx RF Channels
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Covers L, S, and C bands
(not limited to GNSS spectrum) - Ability to record or replay up to 4 RF channels @16bit I&Q and 93.75MHz sampling rate (each) simultaneously, in a single rack or 187.5MHz @ 8 bits
- 4, 8 or 16-bit I&Q
- Up to 368 MB/s write & read speed per channel
- Tight synchro phase enabling CRPA recording and replaying
Simple data management
- Up to 15.36TB Internal Storage (x4)
- Convenient swappable design for SSDs
- Quick data dump on local or network storage
- No limit on recording time and playback
Easy to set up and use
- Simple local or remote control
- Quick setup, including for multi-antenna or multi-receiver
- Extensive documentation, examples available & local support
- Portable <10kg (excl. battery)
Use cases
Choose the best recorder & playback solution for GNSS signals for DESIGN, VALIDATION & PRODUCTION
Compact, Precise, and High-Fidelity
Designed for space agencies, aviation, and rail industries, Echo 4RP is the all-in-one GNSS recorder and replayer you need.
Weighing less than 10 kg, this compact system delivers unparalleled precision with 4 synchronized RF channels (Rx & Tx) covering the L, S, and C bands simultaneously.
Capture high-fidelity GNSS signals with 16-bit I&Q at 93.75 MHz per channel, or 8-bit I&Q at 187.5 MHz per channel.
Whether you’re validating satellite navigation, conducting aircraft flight tests, or ensuring seamless railway positioning, Echo 4RP offers a cutting-edge solution for recording and replaying real-world GNSS scenarios.
- 4 RF Channels (Record & Replay)
- Multi-Band Coverage (L, S, C)
- High-Precision 16-bit I&Q Sampling
Resilient GNSS Signal Integrity
With perfect phase synchronization, Echo 4RP is the ultimate CRPA (Controlled Radiation Pattern Antenna) testing tool.
As the demand for anti-jamming and anti-spoofing technology grows, resilient GNSS receivers must undergo realistic interference testing. Echo 4RP enables high-fidelity CRPA recordings and replays, preserving tight phase offsets critical for jamming and spoofing mitigation.
From aerospace defense to mission-critical navigation, ensure unmatched accuracy in your CRPA validation workflows.
- Phase-Synchronized CRPA Testing
- Real-World Jamming & Spoofing Replay
- L, S, and C Bands Coverage
Wideband Recording & Replay for Space Telecom
Echo 4RP is not just a GNSS tool—its extensive bandwidth makes it a game-changer for telecommunication signal testing.
With the ability to record and replay beyond GNSS frequencies, it is particularly suited for space telecom applications.
Whether for satellite communications, radio frequency (RF) testing, or next-gen aerospace connectivity, Echo 4RP ensures seamless signal capture and playback, delivering unmatched fidelity for telecom research and development.
- Record & Replay Any Telecom Signal
- Space Telecom & RF Spectrum Testing
- Ultra-Wideband Capability
Need our previous models?
While Echo 4RP is our flagship solution, we continue to offer our trusted GNSS tools:
Echo R™ – Dedicated Recorder
Echo P™ – Dedicated Replayer
Echo MiniRecorder™ – Portable Solution