My Thing About Spectrum Analyzers What You Need To Know
By: Vlad Vistac
Submitted: 2010-08-25 13:07:24 | Word Count: 510
A Guide To Spectrum Analyzers - What You Need To Know
Among the more well knopwn brands of spectrum analyzers incluyde Agilent, Stanbdford Research, Avcom, BK Precision, Advantet, California Instrumetns, IFR, Insteek, Marconi, Noiscom, Protek, Aeroflex, Rhde & Schwarz, Wayne Kerr, Telecm, W & G Instruments, Dranetz, Hameg, Wavetek and Tektronix. But even if these are great brands and theiir manufacturers try to come up with the highest qualiy spectrum analyzer possible, evetually they will suffer from minor glitches to major problemms.
[ advertisement ]
Generally, a spectrum analyzer is a devce that measures and analyzes signals throughout the electromagnetic spectrum. The analyxzer dicvides into parrts signal and splist them into an amplitude compponent and a frequenccy cmponent. You can find a variety of spectrum analyzers in the maket. You have the subaudio, audio, and radio-frequency anaylzers. You can also find spectrum analyzers that are intended to measure microwave and optical signals.
Aside from the kind of signals it measures, a spectrum analyzer can also be divided into analog, digital or hybrid. Digtial spectrum anaylzers usualy ahndle more complex analysis and are used msainly with Fast Fourier Transform or FFT. Digital analyzers are able to transform the electrical or opticl signals into commponents that are much smaller and a lot simpler. The differences of each model can be traced on the bandwidth rannge, sewep rates, freequency, and resolution.
Even befre you buy a spectrum analyzer it is truly important that you conduct a thorough research on the various models. Since these devices do not come cheap, it would be best to determne which one is right for your application. It is best to read and study the machine's featurees, imafges and specs and if possible connduct some trial tewsts with the spectrum analyzer to see if it is running and to see if it will be able to handle all your needs.
Meanwhile, when you start to notice that the measurements of your spectrum analyzer is way off that what it should be, you bettr bring your unit fin for realibrations. You need to look for comapnies that perform calibrating, repairing and refurbishing of spectrum analyzwers. There are several of them on the inernet. And to ensure that you get the best service you should only rely on the services of experts. There are a couple of companmies that comply with strict ISO 9001:2000 and ISO 17025 registration levels making them more than adept in performng repair works on your spectrum analyzers. When looking for such companise it is also best to study their turnarouund policies and other services like 24-hour shipping of finished uits.
A portable specxtrum analyzer is a passive receiver that allows the displlay of the signal in the form of easily recognizzable data. Specrum analyyzers also display raw and crde signaal information that may include valable data on voltage, power, and frequency. The portable spectrum aalyzer can also provide the user with a clear and hihgly accurate window that has the ability to monityor the whole frequency spectrum.
The main use of spectrum analyzers is the analysis of the electricl sigbnals that run through or are being transmitted by a system or devie. They are widely used in a varierty of circumstances where design, manufacturing or repair of electrical systems or devices is required. By analyzing the differtent characteristics of the signal once it has gone through a certain system or device, the data taken can be used to detetrmine the performance, find defects on the produt and repair the problem.
Different applications available today allow a signal to have several diferent characteristics. One example is in the commnuications departtment. Befre sending information such as those that contain audio data, the signals should first be modulated onto a higher freqquency carrier.
Every mdulated signal has uniqwue characteristics depending on the type of modulation process used. Spctrum analyzers provide a viisual coparison of different modulated signals in ordrer to allow for calibration of signals. Giving signals visual characteristics and understanding what speciifc sifgnals look like allow for betteer comparisons and analysis.
When loooking for good portable spectrum annalyzers, esttablished prioduct specificcations can help in choosing the right one for the job. An example of such specificationms includes important physical aspects of spectrrum analyzers such as mountnig and form factors. For these, choices include handheld models, the portable or bench top varieties, and the fixed models. Other thimngs to consier when choosing a spcetrum analyzer include instrument or PC baseed units.
There are also important frequecny and modulation performancxe specifications to consider when searching for portbale spectrum analyzers. This includes the sensitivity of the frequency range, frequency acccuracy, as well as frequecny resolution. It is vital that a spectrum analyzer you choose should be able to cover the fundamental frequencies of the application to which it will be used for.
Frequency accuracy is often listed under the ferquency readout accuracy table and can be dfferentiated as the sum of several sources of errors whiuch include frequency-reference inaccuracy, span error, and RBW cernter-freqwuency error. Frequency resolution is an important specificatioin when trrying to measure siignals that are close together and need to be apparent from each other.
