Network analyzing apparatus and test method

• US 20040249605A1
• Filed: 05/25/2004
• Published: 12/09/2004
• Est. Priority Date: 05/27/2003
• Status: Active Grant

• Current Assignee: Agilent Technologies, Inc.
• Original Assignee: Agilent Technologies, Inc.
• Inventors: Komatsu, Yasuaki
• Granted Patent: US 7,298,158 B2
• Time in Patent Office: Days
• US Class Current: 702/182
• CPC Class Codes: G01R 27/28 Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response in line transmission systems H04B3/46

Abstract

A network analyzing apparatus that analyzes the network properties of a device under test by applying reference signals to a device under test by frequency sweeping or power sweeping comprises input device for inputting the sweep range and sweep interval of these reference signals as well as the center coordinates and radius of a test circle for testing this device under test; a measurement apparatus for measuring the network properties of this device under test and obtaining measurements for n number of measurement points determined from this sweep range and sweep interval; and a testing apparatus, with this testing apparatus finding the difference between this measurement and center coordinates and, referring to this difference and this radius, determining that this measurement that has been read passes the test if the magnitude of this referred difference is no greater than this referred radius, or is less than this referred radius.

Claims

1. A network analyzing apparatus, wherein the network analyzing apparatus comprises

a means for inputting the center coordinates and radius of a test circle for testing a device under test,

a means for measuring the network properties of this device under test, and a means for testing whether or not the measurements of this measurement means fit within the circle represented by these center coordinates and this radius.

2. The network analyzing apparatus in claim 1, further wherein this testing means tests the network properties of this device under test by finding the difference between the measurements of this measurement means and these center coordinates and comparing the magnitude of this difference and the radius.

3. A network analyzing apparatus, wherein the network analyzing apparatus comprises

a means for inputting the center coordinates of a test circle for testing a device under test,

a means for measuring the network properties of a device under test, and

a means for displaying the measurement of this measurement means on polar coordinates, whose origin is these center coordinates.

4. A network analyzing apparatus, wherein a network analyzing apparatus that analyzes the network properties of a device under test by applying reference signals to the device under test while frequency sweeping or power sweeping comprises

a first input means for inputting the sweep range and sweep interval of these reference signals,

a second input means for inputting the center coordinates and radius of a test circle for testing this device under test,

a first memory means that stores these center coordinates that are input,

a second memory means that stores this radius that is input,

a measurement means that measures the network properties of this device under test and obtains measurements for n number of measurement points determined from this sweep range and this sweep interval,

a third memory means that has elements for these n number of measurement points and that stores the sequence in which these measurements that are obtained are housed in the respective elements, and

a testing means, which reads these measurements from this third memory means, reads these center coordinates from this first memory means, finds the difference between these measurements that have been read and these center coordinates that have been read, and further, reads the radius from this second memory means and, referring to said difference and said radius that has been read, determines these measurements that have been read pass the test when the magnitude of this referred difference is no greater than this referred radius, or is less than this referred radius.

5. The network analyzing apparatus in claim 4, further wherein this device under test passes the test when all of the measurements housed in each of the elements of the sequence stored in this third memory means pass the test by this testing means.

6. The network analyzing apparatus in claim 4, further wherein it comprises a third input means for inputting, from said sweep range, the inspection range that specifies the range to be tested;

and in that this device under test passes the test when, of the measurements housed in each element of the sequence stored in this third memory means, all of the measurements within the test range input by this third input means pass the test by this testing means.

7. The network analyzing apparatus in claim 4, further wherein it has a means with which these measurements or this test circle are displayed on these polar coordinates, with the center coordinates serving as the origin of the polar coordinates.

8. The network analyzing apparatus in claim 4, further wherein when these measurements are displayed, they are displayed in different shapes, figures, or colors in accordance with whether or not these measurements have passed the test.

9. A network analyzing apparatus, wherein a network analyzing apparatus that analyzes the network properties of a device under test by applying reference signals to the device under test while frequency sweeping or power sweeping comprises

a first input means for inputting the sweep range and sweep interval of these reference signals,

a second input means for inputting the center coordinates and radius of a test circle for determining whether this device under test passes the test,

a first memory means that has elements for these n number of measurement points and that stores the sequence in which these center coordinates that are input are housed in the respective elements, and

a second memory means that has elements for these n number of measurement points and that stores the sequence in which this radius that is input is housed in each of these elements,

a measurement means that measures the network properties of this device under test and obtains measurements for each of these n number of measurement points,

a third memory means that has elements for these n number of measurement points and that stores the sequence in which these measurements that are obtained are housed in each of these elements, and

a testing means, which reads these measurements from this third memory means, reads these center coordinates relating to these measurements that have been read from this first memory means, finds the difference between these measurements that have been read and these center coordinates that have been read, and further, reads this radius relating to these measurements that have been read from this second memory means and, referring to this difference and this radius that has been read, determines that these measurements that have been read pass the test when the magnitude of this referred difference is no greater than this referred radius, or is less than this referred radius.

10. The network analyzing apparatus in claim 9, further wherein this device under test passes the test when all of the measurements housed in each of the elements of the sequence stored in this third memory means pass the test by this testing means.

11. The network analyzing apparatus in claim 9, further wherein it comprises a third input means for inputting, of this sweep range, the testing range that specifies the range to be tested,

and in that this device under test passes the test when, of the measurements housed in each element of the sequence stored in this third memory means, all of the measurements within the testing range input by this third input means pass the test by this testing means.

12. The network analyzing apparatus according to claim 9, further wherein it comprises means with which these measurements or this test circle are displayed on these polar coordinates, with these center coordinates serving as the origin of the polar coordinates.

13. The network analyzing apparatus in claim 9, further wherein when these measurements are displayed, they are displayed in different shapes, figures, or colors in accordance with whether or not these measurements have passed the test.

14. A testing method for testing a device under test in a network analyzing apparatus with which the network properties of said device under test are analyzed by applying reference signals to the device under test while frequency sweeping or power sweeping comprises:

inputting sweep range and sweep intervals of said reference signals,

inputting center coordinates and radius of a test circle for testing said device under test,

storing said center coordinates that are input in a first memory device,

storing said radius that is input in a second memory device,

measuring said network properties of said device under test and obtaining measurements for n number of measurement points determined from said sweep range and said sweep interval,

storing said measurements for n number of measurement points in the respective elements for these n number of measurement points of the sequence in a third memory device,

reading said measurements for n number of measurement points from said third memory device,

reading said center coordinates from said first memory device,

determining the difference between said measurements for n number of measurement points that have been read and said center coordinates that have been read, and

reading said radius from said second memory device,

whereby the test is passed when the magnitude of said difference between said measurements for n number of measurement points and said center coordinates is equal to or less than said radius that is read from said second memory device.

15. The testing method according to claim 14 further comprising:

determining if said device under test passes the test when all of said measurements housed in each of said elements of the sequence stored in said third memory device pass said test.

16. The testing method according to claim 14 further comprising:

inputting a test range that specifies that the range to be tested from said sweep range, and determining that said device under test passes the test when, of said measurements housed in each element of the sequence stored in said third memory device, all of the measurements within said test range input by said third input device pass the test.

17. The testing method according to claim 14 further comprising:

displaying said measurements or said test circle on polar coordinates, with said center coordinates serving as the origin of said polar coordinates.

18. A for testing a device under test in a network analyzing apparatus with which the network properties of a device under test are analyzed by applying reference signals to the device under test while frequency sweeping or power sweeping comprises:

inputting sweep range and sweep interval of said reference signals,

inputting center coordinates and radius of a test circle for testing said device under test,

storing said center coordinates that are input in a first memory,

storing said input radius that are housed in each of the elements for n number of measurement points determined by said sweep range and said sweep interval of the sequence in a second memory,

measuring said network properties of said device under test and obtaining measurements for each of said n number of measurement points,

storing said measurements that are obtained and housed in each of the elements for said n number of measurement points of the sequence in a third memory device,

reading said measurements from said third memory device,

reading said center coordinates from said first memory device,

determining the difference between said measurements that have been read and said center coordinates that have been read, and

reading said radius relating to said measurements that have been read from said second memory device,

whereby the test is passed when the magnitude of said difference between said measurements for n number of measurement points and said center coordinates is equal to or less than said radius that is read from said second memory device

19. A testing method for testing a device under test with network analyzing apparatus with which the network properties of said device under test are analyzed by applying reference signals to the device under test while frequency sweeping or power sweeping comprises:

inputting the sweep range and sweep interval of said reference signals,

inputting the center coordinates and radius of a test circle for determining whether said device under test passes the test,

storing said center coordinates which are imputed and housed in each of the elements for n number of measurement points determined from said sweep range and said sweep interval of the sequence in said first memory device,

storing said radius that is input in a second memory device,

measuring said network properties of said device under test to obtain measurements for each of said n number of measurement points,

storing said measurements which are housed in these elements for n number of measurement points of the sequence in a third memory device,

reading said measurements from said third memory device,

reading said center coordinates relating to said measurements that have been read from said first memory device,

determining the difference between said measurements that have been read and said center coordinates that have been read,

reading said radius from this second memory device,

whereby the test is passed when the magnitude of said difference between said measurements for n number of measurement points and said center coordinates is equal to or less than said radius that is read from said second memory device

20. A testing method that tests a device under test in a network analyzing apparatus with which the network properties of said device under test are analyzed by applying reference signals to said device under test while frequency sweeping or power sweeping comprises:

inputting the sweep range and sweep interval of said reference signals,

inputting the center coordinates and radius of a test circle for testing said device under test,

storing said center coordinates that are input and housed in each of the elements for n number of measurement points determined by said sweep range and sweep interval of the sequence in a first memory device,

storing said radius that is input and housed in each of the elements for these n number of measurement points of the sequence in said second memory device,

analyzing said network properties of said device under test to obtain measurements for said n number of measurement points,

storing said measurements that are obtained and housed in each of the elements for said n number of measurement points of the sequence in said third memory device,

reading said measurements from said third memory device,

reading said center coordinates relating to said measurements that have been read from said first memory device,

determining the difference between said measurements that have been read and said center coordinates that have been read, and

reading said radius relating to said measurements that have been read from said second memory device,

whereby the test is passed when the magnitude of said difference between said measurements for n number of measurement points and said center coordinates is equal to or less than said radius that is read from said second memory device.

21. A testing method whereby a device under test is tested in a network analyzing apparatus, said method comprises:

measuring network properties of a device under test,

determining whether or not the measurements measured by said device under test are within a test circle represented by center coordinates and radius, and

displaying said measurements or said test circle on polar coordinates with said center coordinates serving as the origin of said polar coordinates.