Real Time Spectrum Analyser RTSA7500 from BNC

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

ADLINK PCI-9527 for Audio Testing, Acoustic Measurement & Vibration Analysis Applications

ADLINK PCI-9527 24-Bit High-Resolution Dynamic Signal Acquisition and Generation Module

Audio Testing with the ADLINK PCI-9527

The PCI/PXI-9527 is a high-performance, 2-CH analog input and 2-CH analog output dynamic signal acquisition module. This module is specifically designed for audio testing, acoustic measurement, and vibration analysis applications.





The ADLINK PCI/PXI-9527 features two 24-bit simultaneous sampling analog input channels. The 24-bit sigma-delta ADC provides a sampling rate up to 432 kS/s at high resolutions, making it ideal for higher bandwidth dynamic signal measurements and audio testing. The sampling rate can be adjusted by setting the module DDS clock source to an appropriate frequency. All channels are sampled simultaneously and accept an input range from ±40 V to ±0.316 V. The PCI/PXI-9527 analog input supports software selectable AC or DC coupling and 4 mA bias current for integrated electronic piezoelectric (IEPE) sensors.

The ADLINK PCI/PXI-9527 also has two channels of 24-bit resolution, high fidelity analog output. The outputs occur simultaneously at software programmable rates up to 216 kS/s. A software programmable output range of ±0.1 V, ±1 V, and ±10 V is available on the output channels.



  • PXI specifications Rev. 2.2 compliant (PXI-9527)
  • 24-bit Sigma-Delta ADC and DAC
  • 2-CH simultaneous sampling analog input
  • 2-CH simultaneous updated analog output
  • 432 kS/s maximum sampling rate with software programmable rate
  • Programmable input range: ±40 V, ±10 V, ±3.16 V, ±1 V, ±0.316 V
  • Programmable output range: ±10 V, ±1 V, ±0.1 V
  • AC or DC input coupling, software selectable
  • Trigger I/O connector for external digital trigger signal
  • Supports IEPE output on each analog input, software-configurable

Supported Operating System

  • Windows 7/8 x64/x86, Linux

Driver and SDK

  • LabVIEW, MATLAB, C/C++, Visual Basic, Visual Studio.NET

Software Utility

  • DSA Utility



Dynamic Signal Acquisition Overview

Highly dynamic range measurement for audio signal analysis, audio testing, acoustic measurement and vibration monitoring continues to present challenges in the industry. To meet the needs of different applications, ADLINK announces the PXI-9527/PCI-9527, its high resolution 24-bit dynamic signal acquisition module with flexible input configuration and easy-to-use driver. The module provides analog input sampling rates up to 432KS/s and analog output update rates up to 216KS/s. The software selectable AC/DC coupling and IEPE current output also enable easy connection with multiple sensors.


Dynamic Signal Assistant (DSA):

ADLINK’s Dynamic Signal Assistant is a ready-to-run software utility designed for dynamic signal acquisition modules. A Windows®-based configuration interface for setting parameters is provided in addition to a real-time visualized data display. An instrument-style user interface is also provided for basic waveform generation. The Dynamic Signal Assistant can additionally log data from hardware modules. With the Dynamic Signal Assistant, signal acquisition and generation can be accomplished in just minutes, with no need for additional programming.




Acoustic Response Testing

Acoustic Response Testing
Historically, testing of acoustic response in audio playback devices has required critical performance analysis conducted by specialized audio engineers. In addition to design verification, acoustic response testing is also important in production line testing of multimedia devices.


Device Ausio Quality Testing

Device Audio Quality Testing
As multimedia devices in the marketplace increase in complexity and use, expectations for the quality of multimedia output have increased correspondingly, such that market leadership requires excellence of not only design and overall performance, but also output quality.


Noise, Vibration and Harshness

Noise, Vibration and Harshness
Beyond simply accommodating user comfort, monitoring and regulation of NVH can inform overall durability and may include analysis into the acoustic range. NVH management can be applied to cars, trucks and trains. Highly dynamic performance measurement facilitates accurate identification and analysis of noise sources.


Machine Condition Monitoring

Machine Condition Monitoring
Machine condition monitoring allows timely maintenance scheduling and preemptive action to avoid consequences of failure. ADLINK’s dynamic signal acquisition module provides flexible architecture for a wide variety of sensor input types.


Cost Effective Solutions for Audio Testing

Publication Download:

Cost-effective Solutions for Audio Testing (5.71MB)

The universal popularity of mobile devices presents potentially unprecedented growth for device makers. As the user base evolves, multimedia quality features increasingly as a major determinant in market dominance. Accordingly, integration of electro-acoustic components (i.e. receiver, speaker and microphone) into home use and industrial applications is becoming more of an industry mainstay every day. With audio quality thus recognized as a key consumer consideration, providers must maximize the effectiveness of audio testing in their manufacturing process.

This article discusses how high-resolution dynamic signal acquisition modules can serve as a low-cost replacement for existing sound cards while meeting all testing requirements for high-profile mobile devices


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