#spectrum analyser

[thoughtportrait]

Ono Sokki CF350 dual channel Spectrum Analyser

[ife-tugraz]

Frequency mixers are used in RF engineering for frequency conversion. Both input signals are mathematically multiplied with each other. This video complements the EMI Receiver and Spectrum Analyzer videos and clarifies the term 'superheterodyne'.

[drandrewthomas]

Speccy - A Chrome OS Amateur Radio Spectrum Analyzer

Since my Chromebook can run Android apps I find it really useful for listening to audio from my software-defined radios, and sometimes trying to decode things like morse code using decoder apps. Decoding using an app can sometimes be quite frustrating, because they can get confused when more than one person is transmitting code at the same time. That’s because apps can find it difficult to discriminate between multiple tones of differing frequencies.

To get over that problem, like many other people I use a variable bandpass filter (mine’s a SotaBeams digital filter module). That helps remove a lot of the extra tones and make it a lot easier for the app to do the decoding while I’m off doing something else. Getting the filter width and centre frequency right is a bit fiddly though, so I wanted an audio spectrum analyser app that worked as a Chrome App. Unfortunately the Chrome App Store didn’t have any, so I decided to write my own.

That’s how my Speccy Chrome App started out, and you can see what it looks like in the picture below.

It shows a real-time spectrum graph at the top, as well as a waterfall graph below to monitor how the audio changes over time. It shows frequencies up to around 6 kHz, because that’s the range of my filter and because most morse transmissions have low-frequency tones. The code is pretty simple, but I find it very useful for playing with radios. So, if you’ve got a Chrome OS computer and want a play, or just want a look at the code, the links are below.

https://chrome.google.com/webstore/detail/speccy/jajjhmhlemmokkafbebdacciakdbpcdg

https://github.com/drandrewthomas/Speccy

[vigerpersinger]

3D Music Effects (1280 LEDs) Project Site: Here

[analysers123]

Kinds of Analysers and their Uses

Instrument which conducts chemical analysis on sample streams is called analyser. It can be a device that analyze given data. Analysers could be a mechanism to handle analysis on a given substance or sample matter. These are also instruments used to evaluate and break down provided data in detail to discover any relationship between the acquired data. Analyser can either be mechanical, electronic and chemical type of equipment analysers. These devices are also used in solid, liquid and gas samples for chemical analysis. They can be attached to the sample source of easy, quick and automatic sampling. These analysers also called online and inline analysers. Attached sensor for conducting are called the in line’s process stream of fluid substances. Listed below are the common kinds of analysers.

Ø      Logic Analysers – these analysers is used to take number of signals from a system or a circuit and present them in an understandable manner like state machine, timing diagrams, trace and protocol decodes.

Ø      Automated Analysers – this analyser are commonly used in the medical field. They are also a type of medical laboratory instruments employed that can also used to determine various properties of a given human sample.

Ø      Network Analysers – this analyser also used to measure and determine an electrical network’s parameter such as y-parameter, h-parameter and z-parameters.

Ø      Packet Analysers or Protocol Analysers – this analysers used to analyze and detect any network problems externally and internally.

Ø   Spectrum Analysers – used to determine the amount of spectrum power any of the signals may be unknown or may be known.

Ø      Bus Analysers – these are a mixture of hardware and software that is used to diagnose if a bus has already defects or none. This is to avoid possible accidents that can cause due to the unseen faulty component.

Ø      Quadruple Mass Analysers – this is the only type of analyser that is applied for mass analysation.  This kind of analyser are made by four parallel cylindrical rods and equipped with a quadruple to filter ion sample.

Ø      Vector Signal Analyser – it is a device that can measure the magnitude and it is a part of the input signal at a single frequency. It is commonly used for making in-channel measurements like code domain power, error vector magnitude and spectral flatness on known signals.

[scientechworld]

DSA800 series is one of compact size, light weight, economic spectrum analyzers and the digital IF technology guarantees its reliability and performance to meet the most demanding RF applications.

9 kHz to 1.5 GHz Frequency Range

Typical -135 dBm Displayed Average Noise Level (DANL)

-80 dBc/Hz @10 kHz offset Phase Noise

Total Amplitude Uncertainty <1.5 dB

100 Hz Minimum Resolution Bandwidth (RBW)

EMI Filter & Quasi-Peak Detector Kit (optional)

VSWR Measurement Kit (optional)

Standard with Preamplifier and AM/FM Demodulation Function

Advanced measurement functions kit (optional)

1.5 GHz Tracking Generator (optional)

8 inch (800×480 pixels) high-definition display with clear, vivid, and easy to use graphical interface

Complete connectivity with standard interfaces such as LAN, USB Host, USB Device and GPIB (optional)

Compact size, light weight (9.4 lbs)

[scientechworld]

DSA800 series is one of compact size, light weight, economic spectrum analyzers and the digital IF technology guarantees its reliability and performance to meet the most demanding RF applications.

[vorpalgatorade]