Error vector magnitude characterizes actual QAM signals’ deviations from their ideal locations due to nonlinearity and phase noise. In part 1 of this series, we discussed quadrature amplitude modulation (QAM), which results from summing orthogonal amplitude-modulated cosine and sine waves of the same frequency. In part 2, we looked at assigning bit sequences to QAM […]
Test and Measurement Tips
System tests aircraft VMS using HIL
The Vehicle Management System test platform from Bloomy Controls lets you test aircraft VMS for electric, fueled, commercial, military, rotary, fixed-wing, piloted, and unpiloted aircraft.
How to interpret a QAM display: part 2
Sixteen unique 16-QAM symbols can each convey a unique 4-bit sequence. In part 1 of this series, we discussed quadrature amplitude modulation (QAM), which results from summing amplitude-modulated cosine and sine waves of the same frequency. We also looked at the constellation diagram, which a test instrument such as an oscilloscope or vector signal analyzer […]
USB oscilloscope adds 16 logic inputs
Pico Technology is excited to announce the launch of the MSO (Mixed-Signal Oscilloscope) versions of the highly regarded PicoScope 3000E Series. The latest additions combine cutting-edge technology with user-friendly design to meet the diverse needs of engineers, technicians, and researchers worldwide. These new MSO models offer the same powerful features as the existing 3000E series, […]
USB DAQ system reaches 20-bit resolution
The mioDAQ from NI has two 20-bit and two 16-bit flavors. Analog outputs come with two or four, with 16-bit DIO and counters. USB data-acquisition (DAQ) devices have been on the market for many years and come in many varieties. What makes the mioDAQ series from NI different is its 20-bit vertical resolution on two […]
Flea market vintage test equipment, September 2024
The monthly “Flea at MIT” featured an abundance of test equipment. We even bought some.
How to interpret a QAM display: part 1
A constellation diagram plots a quadrature amplitude modulation (QAM) signal’s in-phase and quadrature components. The EE World article “Should I use a spectrum, signal, or vector network analyzer?” in part 3 mentioned that vector-signal analyzers (VSAs) can display modulation-domain and frequency-domain information. Other instruments incorporating digital signal processing (DSP) capabilities, including oscilloscopes, can provide insights into […]
Collect and analyze production test data in the cloud
Averna announced the release of Proligent Cloud, the latest addition to its industry-leading Proligent data management software family. Proligent empowers manufacturers with centralized, user-friendly data insights to optimize production line performance and ensure consistent product quality. Proligent Cloud builds upon the success of its predecessors, Analytics and QuickView, offering a powerful yet intuitive solution for collecting, analyzing, and […]
Voice testing platform adds satellite communications
GL Communications Inc. addressed the press regarding their Satellite Testing Solutions. These solutions evaluate the user experience across satellite communication networks. As the demand for satellite networks increases for mission-critical applications and rural home internet, GL provides tools that interface with satellite endpoint devices, generate customizable audio, objectively measure voice quality, and produce detailed reports. […]
Testing platform now includes 1.6Tb/s test module for high-speed ML/AI applications
Viavi Solutions Inc. announced the first solution to address the testing and validation needs of the emerging 1.6Tb/s ecosystem based on 224G SERDES. This new testing module, the ONE-1600, is the latest addition to the company’s growing ONE LabPro platform, which also includes the HSE-800 800Gb/s test module. Designed to accommodate OSFP1600 and QSFP-DD1600 form factors, […]
