Test & Measurement

RF Receiver combines 120MHz Bandwidth with 32768-Point FFT

2nd December 2015
Mick Elliott

A new option has been added to IZT’s R4000 RF receiver. The 32768-point FFT option in combination with the 120 MHz real-time bandwidth ensures reliable detection of fast bursts and frequency-agile signals. Even the most advanced hoppers with extremely high hop rates are detected under demanding SNR environments.

The Hopper Detector plugin provides real-time information about detected hoppers containing bandwidth, dwell time and time-of-arrival information.

Using the 32768-point FFT, the real-time frequency resolution is less than 5kHz over the full 120MHz bandwidth. The transformation is processed in a high-performance FPGA. The continuous detection without any gaps makes the R4000 a very powerful real-time signal analyser.

In parallel to the PSD (Power Spectral Density), IQ content of sub-bands or even the full bandwidth can be retrieved and forwarded to the sensor controller. This allows users to detect and analyse thousands of signals in parallel.

Utilizing the 4096-point FFT option, the time resolution of the spectrum can be as fast as 25.6 µs per spectrum. This is orders of magnitude faster than swept analysis techniques and meets the demand for systems being able to capture today’s hopping, transient signals.

The IZT R4000 delivers a powerful digitiser, wideband receiver and signal collection system for COMINT and ELINT systems, wideband satellite surveillance and continuous broadband radio signal recording. It achieves an instantaneous bandwidth of 120 MHz and covers a frequency range of up to 18GHz.

 

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