What is a network analyzer?
A network analyzer is a device that tests the properties of transmission and reflection on the electric network. Network components include transmission lines, capacitors, switches, inductors and resistors. Network analyzers are usually used to characterize two -ports such as filters and amplifiers, but can also be used in a multi -port network.
The scalar network analyzer (SN) and a vector network analyzer (VNA) are two types of network analyzer. The three main components consist of each network analyzer including a signal generator, test set and one or more receivers. These devices mainly work on a high -frequency range between 9 kHz and 110 GHz, but several of them work at lower frequencies of about 1 kHz. Lower frequency analyzers are best used to measure the stability of open loops and sound.
Although older models lacked a signal generator, they were designed to work with external separate generators through a special second -rate connectioné as connection of bus interfaces for interface (GPIB). This connection makes it easier to communicate between two pieces of hardware and replace the data between them very quickly. Modern analyzers come with one but two such generators, so they are able to perform more complicated tests. One example is a blender test that requires radio frequency signals (RF) and local oscillator (LO) to be created simultaneously.
The test kit plays two important roles in both analyzers because it divides the incident signal and either uses it to calibrate the signal generator in the SNA or as a phase reference for VNA. The last part in both devices is the receiver that works to record the test results. Both devices have a standard reference port and multiple test ports. Depending on the tag, each test port may be associated with its own receiver or shared.
A scalar network analyzer isAble to measure signal size, while the vector's network analyzer can measure the size and phase of the signal. The measurements are calibrated to make the repetition accurate. The test port that is used for reference is marked R and the primary are marked A, B and C.
vector network analyzers are most commonly used from both types. To ensure that the network analyzer provides accurate results, it must be calibrated regularly. Calibration can be completed automatically or manually, but the process must be in line with certain standards.