CN1588114A

CN1588114A - Quick correcting method for multiple test port

Info

Publication number: CN1588114A
Application number: CN 200410052838
Authority: CN
Inventors: 李春锋; 江斌
Original assignee: SAIKELI OPTICAL CABLE CO Ltd SHANGHAI; Shanghai Electric Cable Research Institute
Current assignee: Shanghai Saikeli Photoelectric Technology Co ltd; Shanghai Electric Cable Research Institute
Priority date: 2004-07-14
Filing date: 2004-07-14
Publication date: 2005-03-02
Anticipated expiration: 2024-07-14
Also published as: CN100420956C

Abstract

The invention provides a multiple test port fast-calibrating method, connecting N same calibration pieces to the extended test ports 1-N at the same time; a computer sets a vector network analyzer to be in one of the M states by a communication interface and control the analyzer to test a calibration piece, and then stores the obtained test data; repeating the above step until the calibration piece is tested in all the M states; the computer switches on the other communication interface to repeat the above steps until the test of all the calibration pieces on the N extended test ports are completed; connecting another N same calibration pieces to these extended test ports 1-N, repeating the above steps until the test for all these calibration pieces are completed; using the computer to regulate the data stored according to the specified addresses to form a M*N error array that corresponds to the N extended test ports in M states. It can largely shorten operating time and increases worked efficiency.

Description

The quick calibration method of a plurality of test ports

Technical field

The present invention relates to the quick calibration method of a plurality of test ports, belong to the wireline test technical field.

Background technology

In the calibration of vector network analyzer, must configure the parameter of analyser earlier, as frequency, power, bandwidth etc., measure the value of calibrating device (as open circuit, short circuit, load and straight-through calibrating device) then under the state after being provided with, and form an error array in view of the above.This error array is stored in the vector network analyzer.When test, test data will utilize this error array to carry out error correction, obtain correct test data.If any setting of vector network analyzer is changed, the error array will accurately lose efficacy in the test.At this moment, must under being provided with state, this calibrate again.Most of vector network analyzers all have communication interface, and computing machine can be by this interface control vector network analyzer, read or send various data (comprising the error array) to vector network analyzer from vector network analyzer.Finish the primary calibration operation in the prior art, only form the error array under a kind of set condition.Change setting, must carry out another time calibration operation.In some test, may require to use multiple different set state, at this moment, must under each set condition, calibrate respectively.If the quantity that test port is expanded more for a long time, the calibration operation workload will be very big.

In the port expanded application of vector network analyzer, computing machine communicates by communication interface and vector network analyzer, the test port PORT1 of vector network analyzer and test port PORT2 are connected on the port expansion switch, select test channel by computing machine by control line control port expansion switch.Suppose on the test port 1～N after the test port PORT1 expansion, to carry out M kind difference single port calibration operation under the state is set.The single port calibration of vector network analyzer is finished by testing three kinds of calibrating devices respectively and forming the error array.These three kinds of calibrating devices are: open circuit calibrating device, short circuit calibrating device, load calibrating device.Utilize traditional method, under certain is provided with state, three kinds of calibrating devices are tested, form the error array then.In this process, the attended operation number of times of calibrating device is 3 times.The number of operations of finishing N test port is 3*N time.Change is provided with then, repeats aforesaid operations, all calibrates until M state to finish, and total number of operations is 3*N*M.

Summary of the invention

The invention provides a kind of quick calibration method of a plurality of test ports, it can realize finishing fast the calibration that multinomial difference is provided with state.

For reaching above-mentioned purpose, the present invention is achieved in that

A kind of quick calibration method of a plurality of test ports,

A) N identical calibrating device is connected on expanding port 1～N simultaneously;

B) computing machine is selected the expanding port that will calibrate by control line;

C) computing machine is set to a kind of state in the M kind state by the communication interface vector network analyzer, and control described vector network analyzer calibrating device is tested, test data is transferred to computing machine by communication interface, and these data is stored in the storer of regulation by computing machine;

D) computing machine changes the state, repeating step c of being provided with), the calibrating device under M kind state is all tested;

E) computing machine makes it connect another expanding port, repeating step c by control line control port expansion switch), step d), the described calibrating device end of test (EOT) on N expanding port;

F) N another identical calibrating device is connected to simultaneously on test port 1～N after the expansion repeating step b), step c), step d), step e), until the equal end of test (EOT) of whole calibrating devices;

G) by described computing machine the data of address storage are in accordance with regulations put in order, form M*N error array, the error array of N expanding port under the corresponding M state.

Described calibrating device can be open circuit calibrating device, short circuit calibrating device, load calibrating device and straight-through calibrating device or its combination.

In the above-mentioned steps, except that the attended operation of calibrating device, all the other are all finished by under the computer control, and the connection number of times of calibrating device is 3*N time, are the 1/M of classic method.Big in test port expansion quantity, it is many to require that state is set, and needs the occasion of frequent calibration, and this method can shorten the running time greatly, increases work efficiency.Simultaneously, number of operations is few, also can reduce the generation of maloperation.

Description of drawings

Fig. 1 is the quickly calibrated schematic diagram of a plurality of test ports

Label declaration:

1 vector network analyzer

2 test ports one

3 test ports two

4 computing machines

5 port expansion switch

6 expanding port

7 communication interfaces,

8 control lines

9 calibrating devices

Embodiment

Further specify the present invention below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of quick calibration method of a plurality of test ports, wherein two port expansion switch 5 link with the test port 1 and the test port 23 of vector network analyzer, and this method may further comprise the steps,

1) N identical calibrating device 9 is connected on 1～N of expanding port 6 simultaneously;

2) computing machine 4 is selected the expanding port 6 that will calibrate by control line 8;

3) computing machine 4 is set to a kind of state in the M kind state by communication interface 7 with vector network analyzer 1, and control 1 pair of calibrating device 9 of described vector network analyzer and test, test data is transferred to computing machine 4 by communication interface 7, and these data is stored in the storer of regulation by computing machine 4;

4) computing machine 4 changes the state, repeating step 3 of being provided with), the calibrating device 9 under M kind state is all tested;

5) computing machine 4 makes it connect another expanding port 6, repeating step 3 by control line 8 control port expansion switch 5), step 4), described calibrating device 9 end of test (EOT) on N expanding port 6;

6) N another identical calibrating device 9 is connected on 1～N of expanding port 6 repeating step 2 simultaneously), step 3), step 4), step 5), until whole calibrating device 9 equal end of test (EOT);

7) by 4 pairs in described computing machine in accordance with regulations the data of address storage put in order, form M*N error array, the error array of N expanding port 6 under the corresponding M state.

Wherein said calibrating device 9 is open circuit calibrating device, short circuit calibrating device, load calibrating device and straight-through calibrating device.

Claims

1, a kind of quick calibration method of a plurality of test ports, it may further comprise the steps,

1) N identical calibrating device is connected on expanding port 1～N simultaneously;

2) computing machine is selected the expanding port that will calibrate by control line;

3) computing machine is set to a kind of state in the M kind state by the communication interface vector network analyzer, and control described vector network analyzer calibrating device is tested, test data is transferred to computing machine by communication interface, and these data is stored in the storer of regulation by computing machine;

4) computing machine changes the state, repeating step 3 of being provided with), the described calibrating device under M kind state is all tested;

5) computing machine makes it connect another expanding port, repeating step 3 by control line control port expansion switch), step 4), the described calibrating device end of test (EOT) on N expanding port;

6) N another identical calibrating device is connected to simultaneously on test port 1～N after the expansion repeating step 2), step 3), step 4), step 5), until the equal end of test (EOT) of whole calibrating devices;

7) by described computing machine the data of address storage are in accordance with regulations put in order, form M*N error array, the error array of N expanding port under the corresponding M state.

2, the quick calibration method of a plurality of test ports according to claim 1 is characterized in that: described calibrating device is open circuit calibrating device, short circuit calibrating device, load calibrating device and straight-through calibrating device or its combination.