Research in mmWave communication applications.

We at Vigven are actively pursuing research in the millimeter wave area to deliver products to our customers using the existing commercially available test equipment (COTS)

Exploration in the mmWave frequencies has taken giant leaps in the past few decades with the advancement in devices physics and fabrication of mmWave components. In particular, the 71–76, 81–86 and 92–95 GHz bands are also used for point-to-point high-bandwidth communication links, inter-satellite links, and point-to-multipoint communications. There are tentative plans to use millimeter waves in the future for 5G mobile phones

These higher frequencies do not suffer from oxygen absorption. There are plans for 10 Gbit/s links using these frequencies as well. In the case of the 92–95 GHz band a small band has been reserved for space-borne radios, limiting this reserved range to a transmission rate of under a few gigabits per second.

The smaller wavelengths in the band permit the use of smaller antennas to achieve the same high directivity and high gain as larger ones in lower bands. Due to the high directivity, coupled with the high free space loss at these frequencies, there is   great scope for a more efficient use of frequencies for point-to-multipoint applications. A large number of highly directive antennas can be placed in a given area, which will enable frequency reuse and also increase the number of users. The large usable channel capacity in this band also will allow for some applications and could be a replacement for the optical fiber.

For more details, contact us on

Krishnagiri, Tamil Nadu 635112
M :- 95000 65885
Tel 080-2354-1313 / 080-2333-9220 /
E Mail

3 Day RF Fundamentals Course

3 Day RF Fundamentals Course Outline

Day One

Transmission Line Basics

Why do we need a special class for microwaves?
What are transmission lines?
Various wavelengths and their corresponding frequencies

Characteristic Impedance

Transmission lines versus regular hook-ups
Distance and propagation in a transmission line
Characteristic impedance
Basic transmission lines

Terminating a Transmission Line

Infinite transmission line
Terminating a lossless transmission line


Incident and reflected waves on a shorted line, an open line and on an arbitrarily terminated line
Reflection coefficient

Impedance and Smith Chart

Gamma plane, plotting impedance
Plotting impedance on a rectangular plane
Smith chart

Standing Waves

Understanding phasors
Phasor representation at an instant for short and open circuit transmission lines
Phasor representation for arbitrary termination
Slotted line
Standing wave ratio (SWR), scalar reflection coefficient (Rho) and return loss
Reflectometer calculator
Converting between Rho, return loss and SWR

Practical Transmission Lines

Propagating modes

Connector Care
  Introduction to Connectors

Connector Examples
Maintaining Connectors
Visual Connector Inspection
Mechanical Connector Inspection
Principles of Connector Care
Industry Standard Specifications

Power Measurements

Why we measure power instead of voltage or current
Units of power
Terms such as average power, square law, pulse power and
peak envelope power

Decibels (dBs)

Relative power and absolute power
Understanding dB and how its use simplifies power transfer calculations

Types of power sensors

Diode sensors

Power transfer

Reflection diagrams for various scenarios of source and load impedance
Uncertainty and mismatch loss with scalar reflection coefficients
Other sources of power meter uncertainty
Ideal and practical power measurement
Maximum or available power

Appendix on understanding logs and dB

Comparing quantities using exponents or powers
What is a logarithm?

dB: a logarithmic power ratio
dBm: a way to express absolute power
Using dB and dBm together
dB as an expression of a voltage ratio
An example of power and voltage ratios
dB used to express tolerances
Power and voltage tolerances

• Lab demo: how to use power measurements to measure insertion loss of a cable

Day Two
Amplitude Modulation

Explain why carrier modulation is used when Transmitting information
Introduce AM
Describe the term “AM modulation Index”
Describe the operation of the envelope detector
AM Measurements
Single Sideband and […]

Join Us at Productronica-India September 21-23, 2016

Pickering Interfaces to showcase PXI, LXI & PCI switching and simulation at Productronica-India September 21-23, 2016

Pickering Interfaces, a leading provider of signal switching and simulation solutions used in electronic test and verification, will showcase their broad catalog of PXI & PCI switching and simulation and Ethernet LXI switching solutions at productronica in Bangalore, India, September 21-23 in booth 3211. These products include Pickering’s LXI Matrix Modules, High-Density PXI Relays Modules, PXI RF Multiplexers, PCI High-Density Resistors, and LXI Chassis. A sampling of products that Pickering will display at electronica are highlighted below:
LXI Simulation Tool – (this tool will be released the week prior to productronica) This simple and highly portable tool provides users with a simple and highly portable platform for application development. Supported products include Pickering Interfaces’ PXI & LXI switching modules as well as partial support of their PXI simulation and instrumentation products. This tool allows programmers to develop and debug test code for Pickering’s LXI switching devices prior to receiving the devices or before installing the LXI switching in a test system.

High-Density 2 Amp PXI Relay Module (model 40-100) – Configured with 83 SPDT relays, this relay module is suitable for applications requiring medium power switching with very high density. It features a 2 Amp current capacity and voltages to 200VDC/140VAC. Typical uses are found in automotive, aerospace, military and power cell testing applications.

PXI Microwave Multiplexer (model 40-784A) – These MUXs have a characteristic impedance of 50Ω and are capable of switching signals up to 40GHz. Available in single, dual or triple, 6 to 1 or 4 to 1 formats, they are suitable for constructing complex microwave switching networks and provide a range of switching configurations to suit most applications.

PCI High-Density Resistor Card (model 50-295) – […]

VigVen is Now the Distributor for Fluke Technologies in Southern India

Fluke Technologies has appointed VigVen Tech Mark Pvt. Ltd., as its distributor in Southern India for their Industrial Group Products.

Fluke Corporation is the world leader in the manufacture, distribution and service of electronic test tools and software. From industrial electronic installation, maintenance and service, to calibration and quality control, Fluke tools help keep business and industry around the globe up and running.

VigVen team is very much delighted to add fluke products to VigVen’s Products portfolio.


    Application Note – Mechanical Measurements Using Digitizers

Application Note – Mechanical Measurements Using Digitizers

Measurements on mechanical devices and systems using a modular digitizer requires the use of a variety of transducers or sensors in order to convert mechanical parameters such as force, acceleration, pressure, rotational speed, and their kindred into electrical signals you can measure. This article is a primer on making such measurements using a modular digitizer.

Click here to read the full article from spectrum Instruments 

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    Permalink spectrum_40_mhz_sine_pre-amplifer_400pxGallery

    Pre-amplifiers extend digitizers dynamic range and sensitivity

Pre-amplifiers extend digitizers dynamic range and sensitivity

For applications where low level electronic signals need to be acquired and analyzed Spectrum has added a range of pre-amplifiers that can be used to boost signal levels. When combined with a Spectrum digitizer these low noise pre-amplifiers can greatly increase the measurement systems overall dynamic range and sensitivity. The new pre-amplifiers are designed to compliment the built-in amplifiers of the digitizer, effectively extending the available input ranges, and allowing the detection and measurement of much smaller signals.

Click here to read the full article 

Spectrum publishes a free Digitizer Handbook

To  keep engineers and scientists up to date with the latest developments in PC based digitizer technology Spectrum has published a handbook that covers the major product features of this powerful class of instrument and also explains when a digitizer can replace an oscilloscope. The 120 page booklet is printed in full color and includes a number of graphical images that highlight and explain key digitizer concepts and their application.

Topics covered include how and when to select a digitizer, understanding the various terms and comparing their performance with other instruments, such as digital oscilloscopes. The handbook then has sections that explain how to achieve the best performance from a product with emphasis being given to measurement speed and accuracy. Examples show how to setup a digitizer and use the various acquisition, trigger and readout modes to ensure important events are always captured and that the acquired data is analyzed as fast as possible. More examples demonstrate the effects of proper signal conditioning and explain how digitizers can be used with a variety of different probes and sensors.

The handbook then discusses the importance of software and what effect this has on project development. It explains the structure of device drivers and how you can program the cards using today’s most popular programming languages such as Visual C++, Borland C++, Gnu C++, Visual Basic, VB.NET, C#, J#, Python and Delphi as well as with third party software tools such as LabVIEW and MATLAB. To help with programming the handbook discusses the advantages of using debug logging and other tools that allow you to test hardware setups and assess their potential data transfer speeds. For those not wanting to develop their own code there is even a […]

High-precision 625 MS/s 16-Bit AWG’s released by Spectrum

Spectrum has announced the release of three new M4i series Arbitrary Waveform Generators (AWG’s) that set new standards in speed and precision. The new models of the M4i.66xx series offer one, two and four channels with each channel capable of outputting electronic signals at rates of up to 625 Megasamples/second (MS/s) with 16 bit vertical resolution. The combination makes these new AWG’s ideal for generating high frequency signals up to 200 MHz with the best possible accuracy and fidelity.
The frequency range and dynamic performance of these AWG’s makes them of interest to engineers and scientists working in areas such as communications, radio, radar, semiconductors, nano-technology, media testing, automation, ultrasound, optics, medical and biological science.

Based on Spectrum’s proven M4i series PCI Express (PCIe) platform the products are much smaller than conventional instruments and can be used in most modern PC’s. Simply install the AWG cards into a vacant PCIe x8 or x16 slot, install the driver, load Spectrum’s software and start generating waveforms. The AWG’s are fully programmable and work with Spectrum’s own SBench 6 control software as well as third party software tools such as LabVIEW, LabWindows and MATLAB.

To allow the generation of long and complex waveforms the AWG’s include a generous 2 GSamples of on-board memory and a number of operating modes such as Single-Shot, Loop, FIFO, Gating and Sequence Replay. The Sequence Replay mode allows to store different waveform segments in memory and concat and loop them in a sequence. Furthermore one can switch between stored waveforms by software command or overload waveforms in run-time.

In FIFO mode the cards use an ultra-fast PCIe x8 Gen2 interface to stream data continuously from the PC memory to the AWG at speeds in excess of 1.5 GB/s. If […]

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    How PXI Can Solve Your Toughest Test & Measurement Challenges

How PXI Can Solve Your Toughest Test & Measurement Challenges

Technology – who can keep up? New applications are announced daily, and many more already in our cars, PCs, appliances, and home theaters that did not exist a short time ago. Every year, products and systems with more intelligence and convenience are available, usually at a lower cost than previous models. The basic premise of our market driven economy is the need to create new products that people will purchase – essentially, technology drives the economy. And don’t we all like new technology!

But just as technology progresses, test technologies and their implementation strategies must change as well. Today’s test requirements include factors such as increased simulation of sensors, fault insertion, higher data rates, and increased precision. All of these factors must be accomplished while simultaneously increasing test throughput and lowering costs. While these electronic test strategies have always been a tough challenge for our industry, it seems to be a more daunting prospect to support today’s technology.
Fortunately, the Test and Measurement industry has been developing new solutions to address these needs. In many cases, the solution has been the PXI (PCI eXtensions for Instrumentation) modular instrumentation architecture, which has shown itself to be a remarkably flexible platform. Over the last 17 years, the sixty plus members of the PXI Systems Alliance (PXISA) have continued to innovate and create modules that can address the newest technologies. Unique test and measurement solutions are being developed in PXI that are not available in other test platforms.
Why is PXI Successful?
Some of the reasons for PXI’s success are obvious. Many vendors, many more products, and many previous applications successes are key reasons. But looking beyond this, there are other reasons for success.

Choices in Software – Many programming languages, including Real Time Operating Systems, […]

PICOSCOPE for Every Application

Here  is an link to an article on electronicsmaker magazine April 2015 issue describing PICOSCOPE for Every Application

PC Oscilloscopes – A Modern Alternative to the Traditional Benchtop Oscilloscope, Pico Technology’s PC oscilloscopes are light and portable.

When used with a laptop computer, a PC oscilloscope allows you to carry a complete electronics lab in the same bag as your PC.

The PicoScope 2200A Series oscilloscopes offer a small, light, modern alternative to bulky benchtop devices. You can now fit a 200 MHz, 1 GS/s instrument easily in your laptop bag! They are perfect for engineers on the move; ideal for a wide range of applications including design, test, education, service, monitoring, fault finding, and repair PicoScope 2200A Series low-cost oscilloscopes offer the powerful performance and reliability of a PicoScope in an exceptionally small form factor. Weighing less than 0.2 kg (7 oz), they slip easily into your pocket or laptop bag; perfect for the engineer on the move!

When you buy one of Pico PC oscilloscopes you don’t just get an oscilloscope: you also get a spectrum analyzer, logic analyzer and data logger. Some models even include a built-in function generator, arbitrary waveform generator and, in MSO models, a logic analyzer too. So with a Pico Technology PC oscilloscope you really do get a complete test and measurement lab in one cost-effective unit. We have an impressive and innovative portfolio of small-footprint, high-performance products
Key Features
Huge Buffer Memory

These days most digital oscilloscopes have high sampling rates, but many of them let you down with a tiny memory buffer which means that you can only use the maximum sampling rate on a few timebases. We offer memory options from 8 kS on our entry level PicoScope 2000 series, to an enormous 2 […]

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