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Basic Principle of Network Analyser
Three series of calibration network carbon and sulfur analyzers are usually used for calibration:
1.
Short Circuit, Open Circuit, Load, Direct Line (SOLT)
2.
Direct, Reflective, Linear (TRL)
3.
Automatic calibration using external automatic calibration model
Because each series of calibration has many different requirements, requirements, according to DUT, and determine which method the test system uses to test requirements.
Because SOLT is widely used, we use it to display a series of calibrations of changes.
Require short circuit, open circuit, task, pass standard in the case of system SOLT (DUT) and impedance.
The standard data of their mechanical properties are loaded into the network carbon and sulfur analyzer before accuracy calibration.
The calibration criteria for the location of port connections (network carbon and sulfur analyzer, end cables, or in test fixtures) are start and end tests.
This is a single reference platform or a single test platform.
Further instructions, you must use a single pluggable connection to make a direct connection.
For example, a single mother-to-man mouth connection or other connection does not require an external device or adapter to complete a direct connection in the SOLT test.
Insertion of any calibration device in the calibration process, rather than in the measurement process, may lead to measurement errors.
If you can't make a single direct connection, it's called insertion.
There are several ways to handle a single insert.
The simplest is to use the same stage (including most of the calibration rings being a horse) with high interest, converters, and adapters for direct connection to each type of short circuit, open circuit and load calibration process, in which the calibration test for DUT is exchanged with a single suitable adapter.
Other calibration calibrations in the SOLT series include response model calibration.
It is faster, but does not delete the bandwidth loss frequency accurately.
It only considers the forward and reverse errors in the 12 model.
You can put short circuit, open circuit and load in a single port for port calibration.
So I can save some time.
If you only measure a single port, such as antenna return loss.
Single enhanced single port calibration is a single complete single port. It is common to use a T/R structure that connects directly to measurement port 2 and has no source.
Finally, according to the regulation, the two-port SOLT calibration can be completed by placing a single short circuit, open circuit and load on two ports.
General SOLT calibration
SOLT calibration laboratory, there are many changes, you can in the actual terminal such as the detection node does not exist or if DUT is used for test fixture, TRL calibration application.
Because the lab does not need to load in these cases, it can be achieved very well.
Auto-calibration is a relatively new method because of its speed, repeatability, simplicity and ease of use.
Further, they remove most of the manual intervention, thus greatly reducing the probability of misoperation in calibration.
These units include traditional electronic components, such as diodes, single terminals or other markers, and prevent eepm from storing information encoded in electronic description details.
When connected to a network of carbon and sulfur analyzers, automatic calibration can be set to a single country.
In these countries, calibration measurements and storage in block and eepm are compared with the relevant countries in order to achieve correct revisions.
No matter which calibration method you use, random error sources should be avoided, reducing bandwidth, using average if reducing noise, providing better results.
When calibrating network carbon and sulfur analyzers, high quality components, consolidation of measurement practices, and a comprehensive understanding of calibration instruments are equally important.
Process requirements
When measuring accurately using a network carbon and sulfur analyzer, you need to understand and perform each step correctly in order to get the best results.
Use high performance components and overall measurement practices.