Questions & Answers on Test & Measurement

May 7, 2017

RF Devices in Satellite communication systems, including filters and multiplexers are subject to high RF power levels. These high power levels can lead to a unique nonlinear breakdown voltage phenomenon in a vacuum or near-vacuum environment called Multipaction. This effect can render a device useless and, thus degrades the reliability of the satellite. All high power devices that are used in spac...read more

Seeing Through the Noise

Test & Measurement

Dr. Jon Bradley

CRFS

Following 20 years in electro-optics and the telecoms industry, I’ve recently shuffled along the electromagnetic spectrum and joined the RF community in earnest. I’m busy preparing a range of educational seminars which we will be announcing soon and thought it might be a great way to introduce those by sharing a few of my own thoughts and experiences in the RF domain.First, what a culture shock!We...read more

What is a Compact Range System?

Antennas Test & Measurement

Editorial Team

Dec 9, 2016

A Compact Range system makes direct far-field measurements of electrically large antennas in a shielded anechoic chamber. It uses a large parabolic reflector to project a small radiating source (feed) into the far field. The reflector is used to transform a spherical wave into a plane wave with far-field characteristics. Multiple-feed systems may be used to improve the far-field characteristics.Th...read more

Who is X-Microwave?

Test & Measurement

Editorial Team

Jun 21, 2017

X-Microwave is a company that has developed an innovative solution that helps engineers to go from similation to production with ease. The X-MWsystem from X-Microwave is a complete modular building block eco-system of RF and Microwave components and test and production accessories. It helps optimize the RF and Microwave Design Process by seamlessly merging simulation, prototyping and production.Th...read more

Difference between EMI and EMC?

RF Basics Test & Measurement

Editorial Team

Nov 13, 2017

All electronic devices emit electromagnetic waves while operating, if these emissions are excessive then they can impact other devices that are operating around it by causing interference. The measure of the level of emission of electromagnetic waves from a device is called EMC (Electromagnetic Compatibility) testing.EMI (Electromagnetic Interference) testing is a test to check the amount of elect...read more

What is a Scalar Network Analyzer?

Test & Measurement

Editorial Team

Aug 6, 2018

A Scalar Network Analyzer is a type of RF network analyzer that is used to measure only the amplitude properties of a DUT (Device Under Test). Unlike a Vector network Analyzer, it does not measure both amplitude and phase of the DUT.They can be used to measure parameters like VSWR and Return loss, which only requires the measurement of the magnitude of a signal at a particular frequency or frequen...read more

What is an Anechoic Chamber?

Antennas Test & Measurement

Glenn Robb

Jun 21, 2017

Anechoic means without echoes. Simply put, it is a chamber (a box or room) without reflections from the walls, ceiling, or floor. It may be an acoustic anechoic chamber, where the walls are treated with fiberglass sound absorbers to suppress echoes. In our RF world, we are talking about a shielded room, where the inner surfaces have been treated with radio wave absorbers. Typical absorbers may be ...read more

What is RBW and VBW in a Spectrum Analyzer?

Test & Measurement

What do you mean by resolution bandwidth and video bandwidth in a spectrum analyzer?

Answer

What is TETRA (Terrestrial Trunked Radio)?

Test & Measurement

Answer

What is Electromagnetic Compatibility (EMC) Testing?

RF Basics Test & Measurement

Editorial Team

Nov 13, 2017

All electronic devices emit some level of electromagnetic waves while operating, if these emissions are excessive then they can impact other devices that are operating around it by causing interference. EMC (Electromagnetic Compatibility) is a compliance test that checks the ability of a device to work as intended without affecting the working of other devices in a common or shared Electromagnetic...read more

What Causes PIM (Passive Inter-modulation)?

Test & Measurement

Answer

What are the challenges that test instrument companies face while delivering solutions to the 5G ecosystem?

5G Test & Measurement

Raghunandan N V

National Instruments

Test and measurement solutions will be a key link in the commercialization cycle. The initial 3GPP specification drafts for release 15 introduce new antenna concepts with controllable/steerable beams, new spectrum in the mmWave frequency bands, and very wide bandwidths compared to LTE today. In hybrid beam forming systems using phased array antenna technologies for mmWave mobile access, the test e...read more

What is a Test Socket?

Test & Measurement

Editorial Team

Dec 11, 2018

RF Test Sockets are used to test high frequency IC's without soldering them on to a PCB. The IC is placed in a test socket which is soldered on to a PCB board which is placed within a test setup. It is easy to add and remove an IC from a test socket.An ideal test socket should be electrically “transparent;” that is, its presence should have no effect on the test results. This chara...read more

Why do mmWave channel measurement campaigns continue to be a focus for the entire industry?

5G Test & Measurement

Raghunandan N V

National Instruments

As the 5G standardization effort moves forward, mmWave channel measurement campaigns continue to be a focus for the entire industry. The challenge with mmWave spectrum is that it is not well understood and the deployment models may in fact be very different from traditional cellular networks below 6 GHz. mmWave beams are highly directional and the mmWave channels change very rapidly, hence, it is ...read more

What is EMI Testing?

Test & Measurement

Editorial Team

Nov 13, 2017

EMI (Electromagnetic Interference) testing is a test to check the amount of electromagnetic interference in an electromagnetic environment caused by external devices or factors. Higher level of interference may result in damage or malfunctioning of any electronic equipment.

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