CN114389983A - Testing device for network analyzer - Google Patents
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- CN114389983A CN114389983A CN202210297388.0A CN202210297388A CN114389983A CN 114389983 A CN114389983 A CN 114389983A CN 202210297388 A CN202210297388 A CN 202210297388A CN 114389983 A CN114389983 A CN 114389983A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/28—Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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Abstract
A test device for a network analyzer is characterized in that a signal output by an output end of the network analyzer is divided into two paths of signals through a power divider, one path of signal is transmitted to a power meter through a first channel, the other path of signal is transmitted to a receiving end of the network analyzer through a second channel, an amplifier is connected into the second channel through a change-over switch module, the switch module is used for controlling the switch to connect the amplifier in the second channel, the signal processor respectively obtains S parameter error values of the receiving end receiving signals of the network analyzer when the amplifier is connected in the second channel by controlling the switch module, and obtaining an S parameter error value of a receiving signal of a receiving end of the network analyzer when the amplifier bypasses the second channel, therefore, a test error curve of the network analyzer is obtained, and the dynamic precision of the receiving end of the network analyzer is tested.
Description
Technical Field
The invention relates to the technical field of network analyzers, in particular to a testing device for a network analyzer.
Background
The network analyzer is a comprehensive microwave measuring instrument which can perform scanning measurement in a wide frequency band to determine network parameters. The dynamic precision is an important index parameter of the network analyzer, the capacity of measuring the amplitude and the phase of a signal when the receiving end of the network analyzer changes in the whole input power dynamic range is measured, and the good dynamic precision of the receiving end is the guarantee for realizing stable and accurate measurement of the network analyzer.
At present, the patent literature on the dynamic accuracy of the receiving end of the network analyzer is very few, and therefore, a device capable of testing the dynamic accuracy of the receiving end of the network analyzer is lacked.
Disclosure of Invention
The invention mainly solves the technical problem of providing a testing device for a network analyzer, which can test the dynamic precision of a receiving end of the network analyzer.
According to a first aspect, an embodiment provides a test apparatus for a network analyzer, the network analyzer comprising a first attenuator, an output terminal and a receiving terminal, wherein the test apparatus comprises: the power divider, the power meter, the switch module, the amplifier, the second attenuator and the signal processor;
the power divider comprises an input end, a first output end and a second output end, the input end of the power divider is connected with the output end of the network analyzer, the first output end is connected with the power meter, and the second output end is connected with the receiving end of the network analyzer through the second attenuator; the power divider is used for dividing a signal output by the output end of the network analyzer into two paths of signals, wherein one path of signal is transmitted to the power meter through a first channel, and the other path of signal is transmitted to the receiving end of the network analyzer through a second channel;
the amplifier is connected in the second channel through the switch module, and the switch module is used for connecting the amplifier in the second channel or bypassing the amplifier in the second channel;
the signal processor is used for configuring current working parameters of the network analyzer, and the current working parameters comprise current working frequency points;
the signal processor is further configured to control the switcher module to bypass the amplifier in the second channel; configuring the attenuation value of the second attenuator to be BkK =0,1,2, … …, n-1, n being a natural number equal to or greater than 1; adjusting the power of a signal output by an output end of the network analyzer so as to enable the power value of the signal received by the power meter to be a first preset power value; obtaining attenuation values of the first attenuator as first preset values A respectively0And a second preset value A1S parameter error value Delta S of receiving end receiving signal of time network analyzerk(ii) a Wherein, Δ Sk=S2k-S1k+△Sk-1，S1kThe attenuation value of the first attenuator is a first preset value A0And the attenuation value of the second attenuator is BkThe receiving end of the time network analyzer receives the S parameter of the signal, S2kThe attenuation value of the first attenuator is a second preset value A1And the attenuation value of the second attenuator is BkReceiving the S parameter of the signal by a receiving end of the time network analyzer; delta Sk-1For the attenuation value of the second attenuator to be Bk-1The attenuation values of the first attenuator are respectively a first preset value A0And a second preset value A1Receiving the S parameter error value of the signal by the receiving end of the time network analyzer;
the signal processor is further used for controlling the change-over switch module to connect the amplifier in the second channel; configuring the attenuation value of the first attenuator to be A0Setting the attenuation value of the second attenuator to be B0(ii) a Adjusting the power of the output signal of the output end of the network analyzer to enable the power of the signal received by the power meter to be a second preset power value; obtaining S parameter error value Delta S of receiving signal of receiving end of network analyzern(ii) a Wherein, Δ Sn= Sn- S1k，SnFor the attenuation value of the first attenuator to be A0And the attenuation value of the second attenuator is B0Receiving the S parameter of the signal by a receiving end of the time network analyzer;
the signal processor is further configured to calculate an S parameter error value Δ S based on the S parameter error value Δ SkAnd Δ SnAnd acquiring a test error curve of the network analyzer at the current working frequency point, and outputting the test error curve.
In one embodiment, the amplifier is connected between the output end of the network analyzer and the input end of the power divider through the switch module;
the switch module is configured to connect the amplifier between the output terminal of the network analyzer and the input terminal of the power divider, or directly connect the output terminal of the network analyzer and the input terminal of the power divider.
In one embodiment, the amplifier is connected between the second output terminal of the power divider and the input terminal of the second attenuator through the switch module;
the switch module is configured to connect the amplifier between the second output terminal of the power divider and the input terminal of the second attenuator, or directly connect the second output terminal of the power divider and the input terminal of the second attenuator.
In one embodiment, the amplifier is connected between the output end of the second attenuator and the receiving end of the network analyzer through the switch module;
the switch module is used for connecting the amplifier between the output end of the second attenuator and the receiving end of the network analyzer, or is used for directly connecting the output end of the second attenuator and the receiving end of the network analyzer.
In one embodiment, the diverter switch module comprises: a first changeover switch and a second changeover switch;
the first end of the first selector switch is connected with the input end of the selector switch module, and the second end of the first selector switch is switched between the input end of the amplifier and the first end of the second selector switch;
the first end of the second change-over switch is switched between the output end of the amplifier and the second end of the first change-over switch, and the second end of the second change-over switch is connected with the output end of the change-over switch module.
In one embodiment, the S parameter of the signal received by the receiving end of the network analyzer includes: an S amplitude parameter and an S phase parameter;
the S parameter error value of the receiving end receiving signal of the network analyzer comprises: an S amplitude parameter error value and an S phase parameter error value;
the test error curve of the network analyzer at the current working frequency point comprises: an amplitude test error curve and a phase test error curve.
In one embodiment, the attenuation value B of the second attenuatorkIs the attenuation value Bk-1An integer multiple of (B), wherein B0=0，Bn-1Less than or equal to the maximum value of the measuring range of the second attenuator.
In one embodiment, the first preset value A of the first attenuator0Is 0, the second preset value A of the first attenuator1Any attenuation value greater than 0 and less than its maximum value of range.
In one embodiment, the signal processor is further configured to adjust a current working frequency point of the network analyzer; and under the adjusted current working frequency point, acquiring a test error curve of the network analyzer at the adjusted current working frequency point, and outputting the test error curve.
In one embodiment, the method further comprises:
the display is used for displaying a test error curve of the network analyzer at the current working frequency point;
and the control panel is provided with a button for controlling the switch module to switch.
According to the testing device for the network analyzer in the above embodiment, the signal output by the output terminal of the network analyzer is divided into two paths of signals by the power divider, one path of signal is transmitted to the power meter through the first channel, the other path of signal is transmitted to the receiving terminal of the network analyzer through the second channel, the amplifier is connected to the second channel through the switch module, the switch module is used for controlling the switch to connect the amplifier in the second channel, the signal processor respectively obtains S parameter error values of the receiving end receiving signals of the network analyzer when the amplifier is connected in the second channel by controlling the switch module, and obtaining an S parameter error value of a receiving signal of a receiving end of the network analyzer when the amplifier bypasses the second channel, thereby obtaining a test error curve of the network analyzer to realize the test of the dynamic precision of the receiving end of the network analyzer;
in addition, the testing device for the network analyzer of the embodiment replaces the program-controlled attenuator of the network analyzer with the program-controlled attenuator, so that the cost of the testing device is greatly saved; and whether the amplifier is connected to the second channel or not is controlled and switched by the switch module, so that the range of the signal power tested by the receiving end of the network analyzer is enlarged.
Drawings
Fig. 1 is a schematic structural diagram of a testing apparatus for a network analyzer according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a testing apparatus for a network analyzer according to an embodiment;
FIG. 3 is a schematic structural diagram of a testing apparatus for a network analyzer according to another embodiment;
FIG. 4 is a schematic structural diagram of a testing apparatus for a network analyzer according to still another embodiment;
FIG. 5 is a flow chart illustrating testing of one embodiment of a signal processor.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
At present, a testing apparatus of a network analyzer includes: the system comprises a program-controlled attenuator, an amplifier, a power divider and a power meter, wherein the program-controlled attenuator is used for adjusting the input power of a receiving end of a network analyzer, the amplifier is used for compensating the signal attenuation of a testing device, one end of the power divider is connected with the power meter and is used for monitoring the transmitting power so as to obtain the reference power required by the receiving end, the program-controlled attenuator is an independent module outside the network analyzer, the program-controlled attenuator is expensive, and the cost and the size area of the testing device are increased by adopting the external program-controlled attenuator; in addition, the front end of the power divider does not have a gating circuit of the amplifier, and the amplifier is not or always present, so that the power consumption of the testing device is increased, and the power of the input of the receiver is dynamically reduced.
Based on the above problems, the testing device for the network analyzer provided by the embodiment of the present invention replaces one programmable attenuator with a self-contained programmable attenuator inside the network analyzer, so that the cost of the testing device is greatly saved, and the switching of whether the amplifier is gated or not is realized by the switch module, thereby improving the dynamic range of the power of the signal received by the receiving end of the network analyzer.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a testing apparatus for a network analyzer according to an embodiment, which is hereinafter referred to as a testing apparatus for short, wherein the network analyzer is any one of network analyzers in the prior art, a network analyzer 10 provided in this embodiment includes a first attenuator 11, an output end a, and a receiving end r, and a testing apparatus 20 provided in this embodiment includes: a power divider 21, a power meter 22, a switch module 23, an amplifier 24, a second attenuator 25 and a signal processor.
Signals of the preset frequency points generated by the network analyzer 10 are attenuated by the first attenuator 11, and then output to the testing device 20 through the output end a, and signals returned by the testing device 20 return to the network analyzer 10 through the receiving end r.
The test apparatus 20 provided in this embodiment divides a signal output by the output end a of the network analyzer 10 into two paths of signals through the power divider 21, where one path of signal is transmitted to the power meter 22 through the first channel, and the other path of signal is transmitted to the receiving end r of the network analyzer 10 through the second channel. The following is a detailed description:
the power divider 21 includes an input terminal, a first output terminal, and a second output terminal. Wherein, the input end of the power divider 21 is connected to the output end a of the network analyzer 10, the first output end is connected to the power meter 22, and the second output end is connected to the receiving end r of the network analyzer 10 through the second attenuator 25; the power divider 21 is configured to divide a signal output by the output end a of the network analyzer 10 into two paths of signals, where one path of signal is transmitted to the power meter 22 through a first channel, and the other path of signal is transmitted to the receiving end r of the network analyzer 10 through a second channel. In this embodiment, the power divider 21 divides the signal output by the output end a of the network analyzer 10 into two paths, and after one path of signal is transmitted to the power meter 22, the power meter 22 can detect the power of the signal output by the output end a.
The amplifier 24 is connected in the second channel by a switch module 23, the switch module 23 being used to connect the amplifier 24 in the second channel or to bypass the amplifier 24 in the second channel. Since the amplifier 24 is capable of amplifying the power of the transmitted signal on the second channel. When the receiving end r of the network analyzer 10 needs to input a high-power signal, the amplifier 24 is connected to the second channel through the switch module 23; when the receiving end r of the network analyzer 10 needs to input a low-power signal, the amplifier 24 is bypassed in the second channel by the switch module 23, that is, the amplifier 24 is not connected to the second channel, and at this time, the power supply of the amplifier 24 needs to be turned off, so as to save power consumption.
Referring to fig. 2, in an embodiment, the network analyzer 10 includes a first attenuator 11; the test apparatus 20 includes: the power divider 21, the power meter 22, the switch module 23, the amplifier 24 and the second attenuator 25, wherein the amplifier 24 is connected between the output end a of the network analyzer 10 and the input end of the power divider 21 through the switch module 23; in this embodiment, the switch module 23 is used to connect the amplifier 24 between the output terminal a of the network analyzer 10 and the input terminal of the power divider 21, or to directly connect the output terminal a of the network analyzer 10 and the input terminal of the power divider 21. The method specifically comprises the following steps: the switch module 23 includes a first switch 301 and a second switch 302, a first end of the first switch 301 is connected to an input end of the switch module 23, that is, the first end of the first switch 301 is connected to the output end a of the network analyzer 10, and a second end of the first switch 301 switches between an input end of the amplifier 24 and a first end of the second switch 302; a first end of the second switch 302 switches between the output end of the amplifier 24 and a second end of the first switch 301, and a second end of the second switch 302 is connected to the output end of the switch module 23, that is, the second end of the second switch 302 is connected to the input end of the power divider 21.
Referring to fig. 3, in another embodiment, the network analyzer 10 includes a first attenuator 11; the test apparatus 20 includes: the power divider 21, the power meter 22, the switch module 23, the amplifier 24 and the second attenuator 25, wherein the amplifier 24 is connected between the second output end of the power divider 21 and the input end of the second attenuator 25 through the switch module 23; the switch module 23 is used to connect the amplifier 24 between the second output terminal of the power divider 21 and the input terminal of the second attenuator 25, or to directly connect the second output terminal of the power divider 21 and the input terminal of the second attenuator 25. The method specifically comprises the following steps: the switch module 23 includes a first switch 301 and a second switch 302, a first end of the first switch 301 is connected to a second end of the power divider 21, and a second end of the first switch 301 switches between an input end of the amplifier 24 and a first end of the second switch 302; a first terminal of the second switch 302 switches between the output terminal of the amplifier 24 and a second terminal of the first switch 301, and a second terminal of the second switch 302 is connected to the input terminal of the second attenuator 25.
Referring to fig. 4, in yet another embodiment, the network analyzer 10 includes a first attenuator 11; the test apparatus 20 includes: the power divider 21, the power meter 22, the switch module 23, the amplifier 24 and the second attenuator 25, wherein the amplifier 24 is connected between the output end of the second attenuator 25 and the receiving end r of the network analyzer 10 through the switch module 23; the switch module 23 is used to connect the amplifier 24 between the output end of the second attenuator 25 and the receiving end r of the network analyzer 10, or to directly connect the output end of the second attenuator 25 and the receiving end r of the network analyzer 10. The method specifically comprises the following steps: the switch module 23 comprises a first switch 301 and a second switch 302, wherein a first end of the first switch 301 is connected to an output end of the second attenuator 25, and a second end of the first switch 301 switches between an input end of the amplifier 24 and a first end of the second switch 302; a first terminal of the second switch 302 switches between the output terminal of the amplifier 24 and a second terminal of the first switch 301, and the second terminal of the second switch 302 is connected to the receiving terminal r of the network analyzer 10.
To sum up, the embodiment of the present invention implements the switching of whether the amplifier 24 is connected in the second channel through the matching switching of the first switch 301 and the second switch 302, and when the second end of the first switch 301 is switched to the input end of the amplifier 24 and the first end of the second switch 302 is switched to the output end of the amplifier 24, the amplifier 24 is connected in the second channel; when the second terminal of the first switch 301 is switched to the first terminal of the second switch 302, and the first terminal of the second switch 302 is switched to the second terminal of the first switch 301, the amplifier 24 bypasses the second channel.
In an embodiment, the switching of the switch module 23 can be controlled by a control panel, a button for controlling the switch module 23 to switch is disposed on the control panel, and the user can complete the switching connection of the amplifier 24 by manually triggering the button. In another embodiment, the switch module 23 may also be controlled by pre-edited software in the signal processor.
The signal processor in this embodiment is connected to each module of the network analyzer 10 and the testing apparatus 20, and can acquire parameters of signals transmitted in each module of the network analyzer 10 and the testing apparatus 20, and also can output a set command to each module of the network analyzer 10 and the testing apparatus 20, so as to control the network analyzer 10 and the testing apparatus 20 to output signals of set parameters or configure the set parameters.
In this embodiment, the signal processor is used to configure the current operating parameters of the network analyzer 10, such as: the current working frequency point, the intermediate frequency bandwidth, the scanning time, the number of measurement points, and other parameters of the network analyzer 10, wherein the current working frequency point of the network analyzer 10 is the frequency point of the output signal at the output end a.
The signal processor can also perform a test process on the network analyzer, in this embodiment, a test flow is described by taking the test apparatus shown in fig. 2 as an example, please refer to fig. 5, where the test flow is as follows:
step 601: the signal processor controls the switch module 23 to bypass the amplifier 24 in the second channel; the second attenuator 25 is configured to have an attenuation value of BkK =0,1,2, … …, n-1, n being a natural number equal to or greater than 1; adjusting the power of the signal output from the output terminal a of the network analyzer 10 to make the power value of the signal received by the power meter 22 be the first preset power value Pref+ILaj-ILar，ILajThe line loss value IL from the output a of the network analyzer 10 to the input j of the power meter 22 when the amplifier 24 is not connectedarFor the output of the network analyser 10 when the amplifier 24 is not connectedThe line loss from the output end a to the receiving end r, at this time, the power of the receiving end r of the network analyzer 10 receiving the signal is Pref(ii) a The attenuation values of the first attenuator 11 are acquired to be respectively configured as first preset values A0And a second preset value A1S parameter error value Delta S of receiving end r receiving signal of time network analyzer 10k(ii) a Wherein, Δ Sk=S2k-S1k+△Sk-1，S1kThe attenuation value of the first attenuator 11 is a first preset value A0And the attenuation value of the second attenuator 25 is BkThe receiving end r of the time network analyzer 10 receives the S parameter of the signal, S2kThe attenuation value of the first attenuator 11 is a second preset value A1And the attenuation value of the second attenuator 25 is BkThe receiving end r of the time network analyzer 10 receives the S parameter of the signal; delta Sk-1Is the attenuation value of the second attenuator 25 is Bk-1The attenuation values of the first attenuator 11 are respectively the first preset value A0And a second preset value A1The receiving end r of the time network analyzer 10 receives the S parameter error value of the signal.
In addition, the S parameters of the received signal at the receiving end r of the network analyzer 10 include: an S amplitude parameter and an S phase parameter; the S parameter error value of the received signal at the receiving end r of the network analyzer 10 includes: s amplitude parameter error values and S phase parameter error values, e.g. S1kIncluding an S amplitude parameter S1kmagAnd S phase parameter S1kphase，S2kIncluding an S amplitude parameter S2kmagAnd S phase parameter S2kphase；△SkIncluding S amplitude parameter error value Delta SkmagAnd S phase parameter error value Delta Skphase。
In step 601, the attenuation values B of the second attenuator 25 need to be arranged in the order of k =0,1,2, … …, n-1kFinally, n groups of S parameter error values Delta S are obtainedkIn this embodiment, the error values Δ S of n sets of S parameters can be first obtainedkSaved to memory and then step 602 is performed.
Step 602: the signal processor controls the changeover switch module 23 to connect the amplifier 24 in the second channel; the first attenuator 11 is configured to have an attenuation value A0The attenuation value of the second attenuator 25 is set to B0(ii) a Adjusting the power of the signal output from the output terminal a of the network analyzer 10 to make the power of the signal received by the power meter 22 be a second preset power value Pmea+ILaj-pa-ILar-paIn which IL isaj-paFor the line loss value, IL, from the output a of the network analyzer 10 to the input j of the power meter 22 when the amplifier 24 is connectedar-paThe power value of the signal received by the receiving end r of the network analyzer 10 is P, which is the line loss value from the output end a of the network analyzer 10 to the receiving end r when the amplifier 24 is connected tomea(ii) a Obtaining S parameter error value Delta S of receiving end r receiving signal of network analyzer 10n(ii) a Wherein, Δ Sn= Sn- S1k，SnThe attenuation value of the first attenuator 11 is A0And the attenuation value of the second attenuator 25 is B0The receiving end r of the time network analyzer 10 receives the S parameter of the signal.
In step 601 and step 602, the attenuation value A of the first attenuator 11 is used to make the attenuation of the signal more uniform in the test procedure0And the attenuation value B of the second attenuator 250Are all 0, B0To Bn-1Covering the entire range of the second attenuator, and BkIncreasing by equal multiples in the order of k =0,1,2, … …, n-1, for example: b is0=0，B1=B，B2=2B,……, Bn-1And (n-1) B. In addition, the attenuation value A of the first attenuator 111Is any attenuation value except 0 in the range of the first attenuator 11.
Step 603: the signal processor obtains a set of S parameter error values deltaS stored in a memorykAnd according to a set of S parameter error values Delta SkAnd Δ SnAnd obtaining a test error curve of the network analyzer 10 at the current working frequency point, and in the same way, the test error curve of the network analyzer at the current working frequency point includes: and finally, outputting the amplitude test error curve and the phase test error curve to a display for displaying so that a user can observe the dynamic precision of the network analyzer more intuitively.
The above steps 601 to 603 are the test error curve of the network analyzer 10 at one working frequency point, and usually, a plurality of working frequency points of the network analyzer 10 need to be tested to obtain test error curves of different frequency points, and the test flow of other frequency points is the same as the method of steps 601 to 603, and is not described here again.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A test apparatus for a network analyzer, the network analyzer including a first attenuator, an output terminal, and a receiving terminal, the test apparatus comprising: the power divider, the power meter, the switch module, the amplifier, the second attenuator and the signal processor;
the power divider comprises an input end, a first output end and a second output end, the input end of the power divider is connected with the output end of the network analyzer, the first output end is connected with the power meter, and the second output end is connected with the receiving end of the network analyzer through the second attenuator; the power divider is used for dividing a signal output by the output end of the network analyzer into two paths of signals, wherein one path of signal is transmitted to the power meter through a first channel, and the other path of signal is transmitted to the receiving end of the network analyzer through a second channel;
the amplifier is connected in the second channel through the switch module, and the switch module is used for connecting the amplifier in the second channel or bypassing the amplifier in the second channel;
the signal processor is used for configuring current working parameters of the network analyzer, and the current working parameters comprise current working frequency points;
the signal processor is further configured to control the switcher module to bypass the amplifier in the second channel; configuring the attenuation value of the second attenuator to be BkK =0,1,2, … …, n-1, n being a natural number equal to or greater than 1; adjusting the power of a signal output by an output end of the network analyzer so as to enable the power value of the signal received by the power meter to be a first preset power value; obtaining attenuation values of the first attenuator as first preset values A respectively0And a second preset value A1S parameter error value Delta S of receiving end receiving signal of time network analyzerk(ii) a Wherein, Δ Sk=S2k-S1k+△Sk-1，S1kThe attenuation value of the first attenuator is a first preset value A0And the attenuation value of the second attenuator is BkThe receiving end of the time network analyzer receives the S parameter of the signal, S2kThe attenuation value of the first attenuator is a second preset value A1And the attenuation value of the second attenuator is BkReceiving the S parameter of the signal by a receiving end of the time network analyzer; delta Sk-1For the attenuation value of the second attenuator to be Bk-1The attenuation values of the first attenuator are respectively a first preset value A0And a second preset value A1Receiving the S parameter error value of the signal by the receiving end of the time network analyzer;
the signal processor is further used for controlling the change-over switch module to connect the amplifier in the second channel; configuring the attenuation value of the first attenuator to be A0Setting the attenuation value of the second attenuator to be B0(ii) a Adjusting the power of the output signal of the output end of the network analyzer to enable the power of the signal received by the power meter to be a second preset power value; obtaining S parameter error value Delta S of receiving signal of receiving end of network analyzern(ii) a Wherein, Δ Sn= Sn- S1k，SnFor the attenuation value of the first attenuator to be A0And the attenuation value of the second attenuator is B0Receiving the S parameter of the signal by a receiving end of the time network analyzer;
the signal processor is further configured to calculate an S parameter error value Δ S based on the S parameter error value Δ SkAnd Δ SnAnd acquiring a test error curve of the network analyzer at the current working frequency point, and outputting the test error curve.
2. The test apparatus of claim 1, wherein the amplifier is connected between the output of the network analyzer and the input of the power divider through the switch module;
the switch module is configured to connect the amplifier between the output terminal of the network analyzer and the input terminal of the power divider, or directly connect the output terminal of the network analyzer and the input terminal of the power divider.
3. The test apparatus of claim 1, wherein the amplifier is connected between the second output terminal of the power divider and the input terminal of the second attenuator through the switch module;
the switch module is configured to connect the amplifier between the second output terminal of the power divider and the input terminal of the second attenuator, or directly connect the second output terminal of the power divider and the input terminal of the second attenuator.
4. The test apparatus of claim 1, wherein the amplifier is connected between the output of the second attenuator and the receiving end of the network analyzer through the switch module;
the switch module is used for connecting the amplifier between the output end of the second attenuator and the receiving end of the network analyzer, or is used for directly connecting the output end of the second attenuator and the receiving end of the network analyzer.
5. The test device of any one of claims 1 to 4, wherein the diverter switch module comprises: a first changeover switch and a second changeover switch;
the first end of the first selector switch is connected with the input end of the selector switch module, and the second end of the first selector switch is switched between the input end of the amplifier and the first end of the second selector switch;
the first end of the second change-over switch is switched between the output end of the amplifier and the second end of the first change-over switch, and the second end of the second change-over switch is connected with the output end of the change-over switch module.
6. The test apparatus of any one of claims 1 to 4, wherein the S-parameters of the signals received by the receiving end of the network analyzer comprise: an S amplitude parameter and an S phase parameter;
the S parameter error value of the receiving end receiving signal of the network analyzer comprises: an S amplitude parameter error value and an S phase parameter error value;
the test error curve of the network analyzer at the current working frequency point comprises: an amplitude test error curve and a phase test error curve.
7. The test device of any one of claims 1 to 4, wherein the attenuation value B of the second attenuatorkIs the attenuation value Bk-1An integer multiple of (B), wherein B0=0，Bn-1Less than or equal to the maximum value of the measuring range of the second attenuator.
8. The test device according to any one of claims 1 to 4, wherein the first attenuator has a first preset value A0Is 0, the second preset value A of the first attenuator1Any attenuation value greater than 0 and less than its maximum value of range.
9. The testing device of any one of claims 1 to 4, wherein the signal processor is further configured to adjust a current operating frequency point of the network analyzer; and under the adjusted current working frequency point, acquiring a test error curve of the network analyzer at the adjusted current working frequency point, and outputting the test error curve.
10. The test device of any one of claims 1 to 4, further comprising:
the display is used for displaying a test error curve of the network analyzer at the current working frequency point;
and the control panel is provided with a button for controlling the switch module to switch.
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