AV4024D/E/F/G Spectrum Analyzer
4024 series spectrum analyzer has many advantages: wide frequency range, high performance , high sweep speed, various functions, and easy operation. In terms of performance index, it has excellent displayed average noise level, low phase noise, and high sweep speed. In terms of measurement functions, it has measurement functions of spectrum analyzer, interference analyzer, AM/FM/PM analyzer, power meter, channel scanner etc. as well as intelligent measurement functions of channel power, occupied bandwidth, adjacent-channel power ratio, tune&listen, emission mask, and carrier-to-noise ratio etc. 4024 adopts the integrated design of 8.4 inch LCD and capative touch screen, which improves the display definition and operation convenient. It is handheld, compact and light, with flexible power supply, which is very suitable for field work.
4024 can be used for signal and equipment test in the fields of aerospace, microwave & satellite communication, radio communication, radar monitoring, electronic countermeasures & reconnaissance, and precision guidance.
Wide frequency range: from 9kHz to 44GHz, 4 models
Low displayed average noise level: -163dBm@1Hz RBW(typical)
Excellent phase noise performance: -106dBc/Hz@100kHz frequency offset@1GHz carrier
High sweep speed: for 1GHz span, shortest sweep time <20ms
Resolution bandwidth: 1Hz~10MHz
Full-band pre-amplifier: standard configuration
The portable spectrum analyzer is in line with the market demand
For spectrum analyzer, the most basic and commonly used instrument in the field of radio frequency, spectrum analyzer has the name of "microwave engineer's multimeter", which can measure and analyze the signal's chipping component, parasitic, cross modulation, noise sideband and so on very directly, and is one of the indispensable measuring instruments in microwave measurement. For a long time, due to the high price of traditional desktop spectrum analyzer, and the domestic application of microwave mainly focuses on radar, electronic countermeasures, space technology, satellite earth station, EMC testing and other fields, the popularity of spectrum analyzer is not high. In recent years, with the rapid development of communication technology, especially the arrival of 5G era, more and more field operations need the support of spectrum analyzer. In this situation, the large body and high price of traditional spectrum analyzer increasingly restrict the expansion of its application.
The first problem to be solved in the design of portable spectrum analyzer is volume.
Speaking of portable spectrum analyzer, first of all, what is portable, easy to carry, must meet the characteristics of small size, light weight, as we all know spectrum display device is spectrum analyzer display spectrum analysis results platform, is an indispensable important functional components of spectrum analyzer.If the screen is too small, it will be hard to see, but is there a portable spectrum analyzer that is small, light and completely on-screen to meet the market demand?Using computer-screen displays instead of spectral displays, Triarchy's engineers dramatically reduced the size of their instruments.
The portable spectrum analyzer is small in size, low in power consumption and achieves high technical performance, which can meet the needs of general microwave measurement in microwave communication network.
Basic principles of spectrum analyzer
In the measurement of some CATV system indicators, spectrum analyzer is often used. In order to make the measurement results accurate, the use of spectrum analyzer often involves a problem of resolution bandwidth setting.To understand this problem, one must know some basic principles of a spectrum analyzer.
In spectrum analyzer, frequency resolution is a very important concept, it is determined by if filter bandwidth, the bandwidth determines the resolution of the instrument bandwidth.For example, the filter has a bandwidth of 100KHZ. Then the spectrum line frequency is uncertain of 100KHZ, that is, if two spectral lines appear within the bandwidth frequency range of a filter, the instrument cannot detect the two spectral lines, but only displays one spectral line. At this time, the spectral line level (power) reflected by the instrument is the superposition of the level power of the two spectral lines.So you have measurement errors.Therefore, for the two closely related spectral lines, the resolution depends on the bandwidth of the filter.
The filter after the detector in figure 1 is called the detector filter or video filter. It is a low-pass filter, which can reduce the noise changes of the detector output, reveal some signals that have been covered up and close to the background noise, and help stabilize the measurement if the noise power is measured.
The output end of the detector usually has dc component and ac component, and the dc component represents the energy existing in the if bandwidth. Therefore, the dc component can be extracted and some ac components can be removed through video filter, which can give a more stable noiseless output. When using broadband filter, the noise fluctuation is large, while when using narrow-band filter, the fluctuation is significantly reduced. However, the average noise value of the two is the same. In other words, the filter will not reduce the average noise level, but can reduce the peak noise level.Thus it can expose low level signals that cannot be seen with a wide range of visual frequency filters.However, in some cases, such as the analysis of some special noise signals, we need a wide video filter bandwidth for observation and analysis, so we can set the bandwidth of video filter according to different situations.
The relation between the bandwidth of video filter and the resolution bandwidth is as follows: the noise of the detection front can be reduced by a narrow resolution bandwidth, thus reducing the noise output level of the detector;The noise after detection is smoothed down by narrow-band video filter, but the average power level of the noise cannot be reduced.