Real Time Spectrum Analyser RTSA7500 from BNC

RF and Microwave

Berkeley Nucleonics PC-Controlled Real Time Spectrum Analysers (RTSA)


The BNC Model RTSA7500 Real Time Spectrum Analyser has all the standard features of a spectrum analyzer such as frequency controls, marker functions and multi-trace functionality. It also includes a real-time trigger mode for measuring complex data signals such as Wi-Fi and LTE along with markers for tracking specific frequencies.


Real-time triggering is enabled by sophisticated FPGA-based digital signal processing within the RTSA7500 and enables the capture of elusive, time-varying signals across an instantaneous bandwidth of up to 100 MHz. The Model RTSA7500 is a powerful and cost-effective solution for your real time spectrum analyser needs in the lab, on the manufacturing floor or out in the field.


Real Time Spectrum Analyser


  • Real-time spectrum
  • Real-time spectrogram
  • Real-time power spectral density (persistence)
  • Real-Time Triggering
  • Real-Time Recording and Playback

Berkeley Nucleonics Real Time Spectrum Analyser

Extensibility of the RTSA7500 Real Time Spectrum Analyser  for additional functionality and OEMs


  • 10 MHz In for external references and a 10 MHz Out reference for multi-unit synchronization
  • Analog I/Q Out enables OEM high speed digitizers and post-processing software tools
  • GPIO for external triggers and exterior modules such as antenna switches, downconverters, and GPS
  • 10/100/1000 Ethernet port for control and networking the RTSA7500
  • +12 V DC power input allowing drive testing with automobile 12 V DC sources and personal mobility with an external 12 Volt battery
  • External support for 80 MHz and 160 MHz RTBW (optional)
  • External Local Oscillator inputs for phase-coherent radio front-ends (not shown and optional)


SpectrogramSpectrogram View
Along with the standard spectrum graph which plots Power versus Frequency the user can select the Spectrogram View. The Spectrogram View provides a 3-dimensional view of the spectrum adding the dimension of Time. Time zero is at the top of the Spectrogram view and measurements in the past scroll down. The color indicates the relative magnitude of the Power. In this case, white being the highest power. Several palettes are available to optimize for best viewing depending on the signals to be evaluated. By looking at Time, one can see the periodicity of any given signal.


Power Spectral Density

Power Spectral Density Display
The Power Spectral Density Display is commonly called the Persistence Display. Both names give a partial description of what the display does. The color is an indication of how dense or how often the signal is present at the respective power level. In this case yellow represents the level the signal is at most of the time. And signals persist on the screen for a few seconds before fading out allowing you to see signals that come too fast to view in the spectrum graph. One can see the Wi-Fi signal, the Bluetooth Signals, and the Microwave Oven Signals that were present just a few seconds earlier.


IQ PlotsI /Q Plots
The I/Q plot consists of two plots, the I/Q Constellation (if available) on the left, and the I/Q Time Domain on the right. The Constellation data displays the In-phase (I data) vs. the Quadrature (Q data). The Time domain plot shows a trace for the In-phase (I data in green) and a trace for the Quadrature (Q data in red, if available in the mode).


Make measurements locally or remotely Measurement can be made remotely via the Internet around the globe. Ideal for remote monitoring applications.


  • Up to six traces are available as Trace Normal, Trace Average, Max Hold, and Min Hold.
  • Twelve Markers are available as Normal (tracking), Delta, and Fixed with Peak Search functions that can be assigned to any trace.
  • The Real-Time Level Trigger only captures signals over a certain level and is useful for viewing signals over the Internet.
  • For remote applications, Record data on the local PC and then use Playback to view the data without any Internet latency.
  • The widescreen view of a laptop or PC monitor enables enhanced viewing not available on instruments with built-in screens.
  • The intuitive GUI display makes it easy to operate for anyone familiar with a benchtop spectrum analyzer.

Berkeley Nucleonics Real Time Spectrum Analyser Summary Slides








Band FM Radio (88 108 MHz) with 12 Markers


FM Radio Station with Fixed and Delta Markers


Band Wi-Fi 2.4 GHz (2400 2483 MHz) 40 MHz RTBW


Band Wi-Fi 2.4 GHz (2400 2483 MHz) 100 MHz RTBW


Features / Applications

  • Frequency Range from 100 kHz to 8, 18, or 27 GHz
  • Real-Time Bandwidth (RTBW) up to 100 MHz
  • DSP filtering and decimation
  • Real-time FPGA triggering for detection of elusive, time-varying signals
  • Probability of Intercept (POI) as short as 1.02 µs
  • Spurious Free Dynamic Range (SFDR) up to 100 dBc
  • 10 MHz in/out for multi-channel synchronization
  • Analog I/Q outputs for higher sampling rate digitization
  • Open source Python, LabVIEW, MATLAB®, C/C++ and SCPI/VRT APIs

Real Time Spectrum Analyser Options

  • RTSA7500-8B – 100 kHz to 8 GHz with 10 MHz RTBW
  • RTSA7500-8 – 100 kHz to 8 GHz with 100 MHz RTBW
  • RTSA7500-18 – 100 kHz to 18 GHz with 100 MHz RTBW
  • RTSA7500-27 – 100 kHz to 27 GHz with 100 MHz RTBW