The difference between spectrum analyzer and network analyzer
Spectrum analyzer is an instrument that studies the spectrum structure of electrical signal, which is used for the measurement of signal parameters such as signal distortion, modulation, spectral purity, frequency stability and alternating modulation distortion.It can also be called frequency domain oscilloscope, tracking oscilloscope, analysis oscilloscope, harmonic analyzer, frequency characteristic analyzer or Fourier analyzer.Modern spectrum analyzers can display analysis results in either analog or digital mode, and can analyze electrical signals in all radio bands from the very low frequency band to the submillimeter band below 1 hz.If digital circuit and microprocessor are used inside the instrument, it has storage and calculation functions.When standard interface is configured, automatic test system can be easily constituted.
Spectrum analyzer is used to analyze the signal intensity of each frequency, such as an FM transmitter calibration frequency is 153.000 MHz, if in the position of 153 m 2 m near see response spectrum is higher, shows that the bandwidth of the transmitter has 2 m or so, and if the transmitter launch see 51 m, 102 m and 204 m, 255 m have higher ups and downs, such as frequency transmitter bandpass filter is bad, no filter harmonic three times (the above frequency, for example, only related to the frequency point and transmitter frequency doubling method).
The analog spectrum analyzer is called a frequency sweeper, which is equivalent to a receiver that constantly changes the receiving frequency and then displays the amplitude of the field intensity received at each frequency.Digital spectrum analyzer is the first broadband sampling, and then through DSP FFT processing real-time spectrum information.
Network analyzer is more, don't know what you mean with, but whether the Ethernet or mobile GSM network and so on, only digital network using network analyzer, it is based on the agreement, the normal capture data in a network, and then according to analyze the indicators, such as Ethernet network analyzer, have broadband, sending packages, receive package number, TCP packets, UDP packets, ICMP packets, IGMP packets and so on, for analysis in the network data flow.Monitoring ARP attacks, for example, can capture and analyze MAC and IP addresses that send large Numbers of ARP packets.
Network analyzer a comprehensive microwave measuring instrument capable of scanning measurements over a wide band to determine network parameters.The full name is microwave network analyzer.The network analyzer is a new instrument for measuring network parameters, which can directly measure the complex scattering parameters of active or passive, reversible or irreversible two-port and single-port networks, and give the amplitude and phase frequency characteristics of each scattering parameter in the way of sweep frequency.Automatic network analyzer can correct the measurement results point by point, and convert dozens of other network parameters, such as input reflection coefficient, output reflection coefficient, voltage standing wave ratio, impedance (or admittance), attenuation (or gain), phase shift and group delay, as well as isolation degree and orientation degree.
The spectrum analyzer is constantly updating from the previous clumsy large-scale products to the miniature spectrum analyzer series. In particular, the Triarchy series products imported from Canada are more convenient than hand-held ones. The size of the U disk can be called the smallest spectrum analyzer in the world.