CN107888302B - Device for monitoring radio frequency test of receiver - Google Patents
Device for monitoring radio frequency test of receiver Download PDFInfo
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- CN107888302B CN107888302B CN201610877085.0A CN201610877085A CN107888302B CN 107888302 B CN107888302 B CN 107888302B CN 201610877085 A CN201610877085 A CN 201610877085A CN 107888302 B CN107888302 B CN 107888302B
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- H04B17/20—Monitoring; Testing of receivers
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Abstract
The invention provides a device for monitoring a radio frequency test of a receiver, which comprises a receiver intermediate frequency port, a receiver radio frequency port, a receiver audio port, a frequency spectrograph port, a power meter port, at least two signal source ports, an audio analyzer port and at least eight radio frequency links which are respectively used for monitoring the radio frequency test of different receivers. The device is through coaxial switch at receiver intermediate frequency port, receiver radio frequency port, receiver audio port, the spectrometer port, the dynamometer port, set up a plurality of radio frequency links between two at least signal source ports and audio analyzer ports, and through the switching between the many radio frequency links of connection state control of each terminal on the coaxial switch, thereby make the device can be applicable to different test environment, need not to manually set up different links when carrying out different test items, the degree of accuracy and the efficiency of software testing that have improved.
Description
Technical Field
The invention relates to the technical field of radio frequency circuits, in particular to a device for monitoring a radio frequency test of a receiver.
Background
The terminal radio frequency automatic test system is an automatic test system which is controlled by a computer, automatically completes call establishment, link switching, signal measurement, data calculation and processing and outputs test results, and is mainly applied to radio frequency index test of a monitoring receiver and building of an integrated test system.
In the prior art, the radio frequency switching unit is mainly produced by a few foreign manufacturers and uses advanced testing instruments, but still has many defects. Such as long production cycle, large limitation, high price, and especially difficult flexible application in different testing environments. In the process of testing the radio frequency terminal equipment, corresponding radio frequency links are required to be carried to meet the testing requirements aiming at different testing environments, meanwhile, a plurality of radio frequency links are required to be carried in the process of completing one radio frequency testing, and if the testing links are carried manually, measuring errors can be introduced to influence the accuracy of the testing results. In addition, the terminal switching unit at the present stage has a single function, and cannot complete the test indexes of all the test items of model approval.
Disclosure of Invention
In view of the above, the present invention has been developed to provide an apparatus for monitoring a radio frequency test of a receiver that overcomes, or at least partially solves, the above-mentioned problems.
According to an aspect of the present invention, there is provided an apparatus for monitoring a radio frequency test of a receiver, including a receiver intermediate frequency port, a receiver radio frequency port, a receiver audio port, a spectrometer port, a power meter port, at least two signal source ports, an audio analyzer port, and at least eight radio frequency links for monitoring radio frequency tests of different receivers respectively; wherein:
the intermediate frequency port of the receiver is directly connected with the port of the frequency spectrograph to form a first radio frequency link;
the audio port of the receiver is directly connected with the port of the audio analyzer to form a second radio frequency link;
the first signal source port is connected to the radio frequency port of the receiver through a first coaxial switch and a second coaxial switch in sequence to form a third radio frequency link;
the second signal source port is connected to the receiver radio frequency port through a third coaxial switch and the second coaxial switch in sequence to form a fourth radio frequency link;
the first signal source port is connected to the radio frequency port of the receiver sequentially through a first coaxial switch, a one-to-two power divider and a second coaxial switch to form a fifth radio frequency link;
the second signal source port is connected to the receiver radio frequency port sequentially through a third coaxial switch, the one-to-two power divider and the second coaxial switch to form a sixth radio frequency link;
the first signal source port is connected to the power meter port through the first coaxial switch and the fourth coaxial switch in sequence to form a seventh radio frequency link;
the second signal source port is connected to the power meter port through the third coaxial switch and the fourth coaxial switch in sequence to form an eighth radio frequency link;
the first coaxial switch, the second coaxial switch and the third coaxial switch each include at least three terminals, the fourth coaxial switch includes at least two terminals, and the connection state of each terminal on the first coaxial switch, the second coaxial switch, the third coaxial switch and/or the fourth coaxial switch controls the connection or disconnection of each radio frequency link where the terminal is located.
Optionally, the apparatus further comprises at least two load ports, a ninth radio frequency link and a tenth radio frequency link; wherein:
the first signal source port is directly connected with a first load port to form a ninth radio frequency link, and the ninth radio frequency link is used for calibrating a radio frequency link where the first signal source port is located;
and the second signal source port is directly connected with the second load port to form a tenth radio frequency link, and the tenth radio frequency link is used for calibrating the radio frequency link where the second signal source port is located.
Optionally, an attenuating component is further connected between the second coaxial switch and the receiver rf port.
Optionally, the attenuation member is a first adjustable attenuator.
Optionally, the attenuating component comprises at least two fixed attenuators and at least two coaxial switches; wherein:
and the fifth coaxial switch and the sixth coaxial switch respectively comprise at least two terminals, two ends of the first fixed attenuator and the second fixed attenuator are respectively connected to different terminals of the fifth coaxial switch and the sixth coaxial switch, and the connection state of each terminal on the fifth coaxial switch and the sixth coaxial switch controls the fixed attenuator used in the attenuation part to be the first fixed attenuator or the second fixed attenuator.
Optionally, a second adjustable attenuator is further connected between the power meter port and the fourth coaxial switch.
Optionally, the receiver intermediate frequency port, the receiver radio frequency port, the power meter port, and the load port adopt N-type connectors; the audio port of the receiver and the audio analyzer port adopt BNC connectors; the port of the frequency spectrograph adopts an SMA joint; the signal source port adopts an N-type connector or an SMA connector.
Optionally, the first signal source port adopts an SMA connector, and the second signal source port adopts an N-type connector.
By adopting the device provided by the embodiment of the invention, a plurality of radio frequency links are established among the receiver intermediate frequency port, the receiver radio frequency port, the receiver audio port, the spectrometer port, the power meter port, the at least two signal source ports and the audio analyzer port through the coaxial switch, and the switching among the plurality of radio frequency links is controlled through the connection state of each terminal on the coaxial switch, so that the device can be suitable for different test environments, different links do not need to be established manually during different test items, and the test accuracy and the test efficiency are improved.
Furthermore, in the embodiment of the invention, the attenuator is connected in the device, so that the conditions of instrument overload and even instrument burnout caused by overlarge signals are avoided, and the safety and the test stability of each instrument in the test process can be ensured on the premise that the device is suitable for different test environments.
Furthermore, in the embodiment of the invention, a plurality of attenuators are connected in the device, so that the device can flexibly select the required attenuator according to different test items and test environments, thereby better protecting the safety of each instrument and further improving the test stability to a greater extent.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic block diagram of an apparatus for monitoring a radio frequency test of a receiver in accordance with one embodiment of the present invention;
FIG. 2 is a schematic block diagram of an apparatus for monitoring a radio frequency test of a receiver according to another embodiment of the present invention;
FIG. 3 is a schematic block diagram of an attenuation block of an apparatus for monitoring radio frequency testing of a receiver in accordance with one embodiment of the present invention;
fig. 4 is a circuit diagram of an apparatus for monitoring a radio frequency test of a receiver according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a schematic block diagram of an apparatus 100 for monitoring a radio frequency test of a receiver according to an embodiment of the present invention. As shown in fig. 1, the apparatus 100 for monitoring a radio frequency test of a receiver may generally comprise: a receiver intermediate frequency port 101, a receiver radio frequency port 102, a receiver audio port 103, a spectrometer port 104, a power meter port 105, at least two signal source ports 106 and 107, an audio analyzer port 108, and at least eight radio frequency links for monitoring different receiver radio frequency tests, respectively; wherein:
an intermediate frequency port 101 of the receiver is directly connected with a port 104 of a frequency spectrograph to form a first radio frequency link;
the receiver audio port 103 is directly connected with the audio analyzer port 108 to form a second radio frequency link;
the first signal source port 106 is connected to the receiver rf port 102 sequentially through the first coaxial switch 109 and the second coaxial switch 110 to form a third rf link;
the second signal source port 107 is connected to the receiver rf port 102 sequentially through the third coaxial switch 111 and the second coaxial switch 110 to form a fourth rf link;
the first signal source port 106 is connected to the receiver rf port 102 sequentially through the first coaxial switch 109, the one-to-two power divider 112, and the second coaxial switch 110 to form a fifth rf link;
the second signal source port 107 is connected to the receiver rf port 102 sequentially through the third coaxial switch 111, the one-to-two power divider 112, and the second coaxial switch 110 to form a sixth rf link;
the first signal source port 106 is connected to the power meter port 105 through the first coaxial switch 109 and the fourth coaxial switch 113 in sequence to form a seventh radio frequency link;
the second signal source port 107 is connected to the power meter port 105 through the third coaxial switch 111 and the fourth coaxial switch 113 in sequence to form an eighth radio frequency link;
the first coaxial switch 109, the second coaxial switch 110 and the third coaxial switch 111 each include at least three terminals, the fourth coaxial switch 113 includes at least two terminals, and the connection state of each terminal on the first coaxial switch 109, the second coaxial switch 110, the third coaxial switch 111 and/or the fourth coaxial switch 113 controls the connection or disconnection of each rf link where it is located.
In this embodiment, the test items of each rf link are as follows:
the first radio frequency link may be used to test the following items: working frequency range, frequency resolution, frequency accuracy, level measurement error, third-order intercept point, second-order intercept point, sensitivity, intermediate frequency interference rejection ratio, image frequency interference rejection ratio, undistorted dynamic range, maximum working dynamic range, receiver spurious emission, and scanning speed. In addition, when the spectrometer port 104 is connected to a noise coefficient analyzer, a signal analyzer, a network analyzer, or the like, the first rf link may be used to test the noise coefficient, the if phase noise, the voltage standing wave ratio, or the like.
The second radio frequency link may be used to test the following items: sensitivity, audio distortion factor.
The third radio frequency link may be used to test the following items: sensitivity, third-order intercept point, second-order intercept point, intermediate frequency interference rejection ratio and image frequency interference rejection ratio.
The fourth radio frequency link may be used to test the following items: third order truncation point, second order truncation point.
The fifth radio frequency link may be used to test the following items: third order truncation point, second order truncation point.
The sixth radio frequency link may be used to test the following items: third order truncation point, second order truncation point.
The seventh radio frequency link may be used to test the following items: sensitivity, third-order intercept point, second-order intercept point, intermediate frequency interference rejection ratio and image frequency interference rejection ratio.
The eighth radio frequency link may be used to test the following items: third order truncation point, second order truncation point.
By adopting the device provided by the embodiment of the invention, a plurality of radio frequency links are established among the receiver intermediate frequency port, the receiver radio frequency port, the receiver audio port, the spectrometer port, the power meter port, the at least two signal source ports and the audio analyzer port through the coaxial switch, and the switching among the plurality of radio frequency links is controlled through the connection state of each terminal on the coaxial switch, so that the device can be suitable for different test environments, different links do not need to be established manually during different test items, and the test accuracy and the test efficiency are improved. In addition, the device can flexibly switch the signal path used in the test process according to different test environments, so that the test signal can be necessarily processed according to the radio frequency test standard of the monitoring receiver and the relevant requirements on radio frequency test in the radio equipment model approval test in China on the premise of not influencing the test result, thereby providing wide functions under the condition of not influencing the test precision, laying a foundation for the radio frequency test of the future model approval monitoring receiver and having important significance.
Optionally, the apparatus 100 further comprises at least two load ports and a ninth radio frequency link and a tenth radio frequency link; wherein:
the first signal source port 106 is directly connected to the first load port to form a ninth radio frequency link, and the ninth radio frequency link is used for calibrating a radio frequency link where the first signal source port 106 is located;
the second signal source port 107 is directly connected to the second load port to form a tenth rf link, and the tenth rf link is used to calibrate the rf link where the second signal source port 107 is located.
Wherein, the load port can be connected with an impedance matching resistor.
In this alternative, the method is suitable for use when a radio frequency link where the first signal source port 106 is located or a radio frequency link where the second signal source port 107 is located needs to be calibrated, and when the radio frequency link where the first signal source port 106 is located needs to be calibrated, the first signal source port 106 and the first load port are connected; when the rf link where the second source port 107 is located needs to be calibrated, the second source port 107 and the second load port are connected. During the calibration process, other radio frequency links may not be communicated; in the actual test process, the ninth radio frequency link and the tenth radio frequency link may not be communicated.
Optionally, as shown in fig. 2, an attenuation component 114 is further connected between the second coaxial switch 110 and the receiver rf port 102.
In this alternative, by connecting the attenuation component 114 between the second coaxial switch 110 and the receiver rf port 102, the instrument overload and even instrument burnout caused by an excessive signal can be avoided, so that the apparatus can ensure the safety of each instrument and the stability of the test in the test process on the premise of being suitable for different test environments.
Optionally, the attenuating component 114 is a first adjustable attenuator.
In this alternative, a first adjustable attenuator is connected between the second coaxial switch 110 and the receiver rf port 102, so that a signal attenuation value on a rf link (a third rf link, a fourth rf link, a fifth rf link, or a sixth rf link) where the second coaxial switch 110 and the receiver rf port 102 are located can be selected according to an actual test environment, thereby better protecting the safety of each instrument, and further improving the test stability to a greater extent.
Optionally, the attenuating component 114 comprises at least two fixed attenuators and at least two coaxial switches; wherein:
the fifth coaxial switch 1141 and the sixth coaxial switch 1142 each include at least two terminals, two ends of the first fixed attenuator 1143 and the second fixed attenuator 1144 are respectively connected to different terminals of the fifth coaxial switch 1141 and the sixth coaxial switch 1142, and the connection state of each terminal on the fifth coaxial switch 1141 and the sixth coaxial switch 1142 controls the fixed attenuator used in the attenuation component 114 to be the first fixed attenuator 1143 or the second fixed attenuator 1144.
In this alternative, the first fixed attenuator 1143 and the second fixed attenuator 1144 should have different attenuation values in order to provide the signal attenuation values with selectivity. Moreover, the number of the fixed attenuators included in the attenuation component 114 may also be greater than 2, and at this time, the number of the terminals on the fifth coaxial switch 1141 and the sixth coaxial switch 1142 should also match the number of the fixed attenuators, that is, the number of the terminals on the fifth coaxial switch 1141 and the sixth coaxial switch 1142 should be at least equal to the number of the fixed attenuators.
For example, the attenuation value of the first fixed attenuator 1143 is 10dBm, and the attenuation value of the second fixed attenuator 1144 is 20 dBm.
Fig. 3 shows a schematic block diagram of the attenuation section 114 in this alternative. In fig. 3, the fifth coaxial switch 1141 includes two terminals: a first terminal 31 and a second terminal 32; the sixth coaxial switch 1142 also includes two terminals: a third terminal 33 and a fourth terminal 34; the first terminal 31 and the third terminal 33 are connected to both ends of the first fixed attenuator 1143, and the second terminal 32 and the fourth terminal 34 are connected to both ends of the second fixed attenuator 1144. The fixed attenuator used in the attenuation component 114 is the first fixed attenuator 1143 or the second fixed attenuator 1144 controlled by the connection state of each terminal of the fifth coaxial switch 1141 and the sixth coaxial switch 1142, and the specific control method is as follows: when the fifth coaxial switch 1141 is connected to the first terminal 31, and the sixth coaxial switch 1142 is connected to the third terminal 33, the fixed attenuator used by the attenuating component 114 is the first fixed attenuator 1143; when the fifth coaxial switch 1141 is connected to the second terminal 32, and the sixth coaxial switch 1142 is connected to the fourth terminal 34, the fixed attenuator used by the attenuating component 114 is the second fixed attenuator 1144.
In this alternative, a plurality of fixed attenuators are connected between the second coaxial switch 110 and the receiver rf port 102, so that a signal attenuation value on an rf link (a third rf link, a fourth rf link, a fifth rf link, or a sixth rf link) where the second coaxial switch 110 and the receiver rf port 102 are located can be selected according to an actual test environment, thereby better protecting the safety of each instrument, and further improving the test stability to a greater extent.
Optionally, a second adjustable attenuator is connected between the power meter port 105 and the fourth coaxial switch 113.
In this alternative, by connecting the second adjustable attenuator between the power meter port 105 and the fourth coaxial switch 113, the signal attenuators on the video link (the seventh radio frequency link or the eighth radio frequency link) where the power meter port 105 and the fourth coaxial switch 113 are located can be selected according to the actual test environment, so that the safety of each instrument can be better protected, and the test stability can be improved to a greater extent.
Further, a plurality of fixed attenuators may be connected between the power meter port 105 and the fourth coaxial switch 113, and both ends of the plurality of fixed attenuators may be connected to different terminals of the two coaxial switches, respectively, so that the selection of the fixed attenuators can be controlled by the connection state of each terminal on the coaxial switches in different test environments.
Optionally, the receiver intermediate frequency port 101, the receiver radio frequency port 102, the power meter port 105, and the load port (the first load port and/or the second load port) adopt N-type connectors; BNC connectors are adopted for the receiver audio port 103 and the audio analyzer port 108; the spectrometer port 104 adopts an SMA connector; the signal source ports (the first signal source port 106 and/or the second signal source port 107) employ N-type connectors or SMA connectors.
Alternatively, the first signal source port 106 employs SMA connector, and the second signal source port 107 employs N-type connector.
Fig. 4 is a circuit diagram of an apparatus for monitoring a radio frequency test of a receiver according to an embodiment of the present invention. In this embodiment, an intermediate frequency receiver is connected to the receiver intermediate frequency port 101; the receiver radio frequency port 102 is connected with a radio frequency receiver; the receiver audio port 103 is connected with an audio receiver; the spectrometer port 104 is connected with a spectrometer; the power meter port 105 is connected with a power meter; the first signal source port 106 is connected with a signal source 1; the second signal source port 107 is connected with a signal source 2; the audio analyzer port 108 is connected with an audio analyzer; the first load interface 115 is connected with a load 1; a load 2 is connected to the second load interface 116. K3-1 is a first coaxial switch, K3-2 is a second coaxial switch, K3-3 is a third coaxial switch, K2-4 is a fourth coaxial switch, K3-5 is a fifth coaxial switch, and K3-6 is a sixth coaxial switch; an adjustable attenuator is connected between the port 105 of the power meter and the fourth coaxial switch K2-4, and the adjustable range of the attenuation value of the adjustable attenuator is 0-11 dB; and an attenuation part is connected between the second coaxial switch K3-2 and the receiver radio frequency port 102, and comprises a fifth coaxial switch K3-5, a sixth coaxial switch K3-6 and two fixed attenuators, wherein the attenuation values of the two fixed attenuators are respectively 10dB and 20dB, and the positions of the two fixed attenuators can be interchanged, namely, the two fixed attenuators can be respectively connected with any terminals on the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6. U1 is a one-to-two power divider.
The following describes how to control the connection or disconnection of each rf link according to the connection state of each terminal on each coaxial switch.
When the first radio frequency link or the second radio frequency link is needed, all terminals on the first coaxial switch K3-1, the second coaxial switch K3-2, the third coaxial switch K3-3, the fourth coaxial switch K2-4, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 can be disconnected.
When a third radio frequency link is needed, the first terminal of the first coaxial switch K3-1 from top to bottom can be connected, the first terminal of the second coaxial switch K3-2 from top to bottom can be connected, the terminals of the third coaxial switch K3-3 and the fourth coaxial switch K2-4 are disconnected, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are connected with the corresponding terminals, for example, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are connected with the first terminal from top to bottom, and a fixed attenuator with an attenuation value of 20dB is adopted; or the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are both communicated with the second terminal from top to bottom, and a fixed attenuator with the attenuation value of 10dB is adopted; or, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are both connected to the third terminal from top to bottom, and no attenuator is used for attenuating signals.
When a fourth radio frequency link is needed, the third terminal of the third coaxial switch K3-3 from top to bottom can be connected, the third terminal of the second coaxial switch K3-2 from top to bottom can be connected, the terminals of the first coaxial switch K3-1 and the fourth coaxial switch K2-4 are disconnected, and the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are connected with the corresponding terminals.
When a fifth radio frequency link is needed, the second terminal of the first coaxial switch K3-1 from top to bottom can be connected, the second terminal of the second coaxial switch K3-2 from top to bottom can be connected, the terminals of the third coaxial switch K3-3 and the fourth coaxial switch K2-4 are disconnected, and the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are connected with the corresponding terminals.
When a sixth radio frequency link is needed, the second terminal of the third coaxial switch K3-3 from top to bottom can be connected, the second terminal of the second coaxial switch K3-2 from top to bottom can be connected, the terminals of the first coaxial switch K3-1 and the fourth coaxial switch K2-4 are disconnected, and the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are connected with the corresponding terminals.
When a seventh radio frequency link is needed, the third terminal of the first coaxial switch K3-1 from top to bottom can be connected, the second terminal of the fourth coaxial switch K2-4 from top to bottom can be connected, and the terminals of the second coaxial switch K3-2, the third coaxial switch K3-3, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are all disconnected.
When the eighth radio frequency link is needed, the first terminal of the third coaxial switch K3-3 from top to bottom can be connected, the first terminal of the fourth coaxial switch K2-4 from top to bottom can be connected, and the terminals of the first coaxial switch K3-1, the second coaxial switch K3-2, the fifth coaxial switch K3-5 and the sixth coaxial switch K3-6 are all disconnected.
Therefore, by adopting the device in the embodiment, a plurality of radio frequency links are built between the receiver intermediate frequency port, the receiver radio frequency port, the receiver audio port, the spectrometer port, the power meter port, the two signal source ports and the audio analyzer port through the plurality of coaxial switches, and the switching among the plurality of radio frequency links is controlled through the connection state of each terminal on the coaxial switches, so that the device can be suitable for different test environments, different links do not need to be manually built when different test items are carried out, and the test accuracy and the test efficiency are improved. Meanwhile, the adjustable attenuator and the fixed attenuator in the device can avoid the condition that the instrument is overloaded and even burnt out due to overlarge signals, so that the device can ensure the safety of each instrument and the stability of the test in the test process on the premise of being suitable for different test environments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of an apparatus for monitoring radio frequency testing of a receiver in accordance with embodiments of the present invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (7)
1. A device for monitoring radio frequency tests of a receiver comprises a receiver intermediate frequency port, a receiver radio frequency port, a receiver audio port, a frequency spectrograph port, a power meter port, at least two signal source ports, an audio analyzer port and at least eight radio frequency links which are respectively used for monitoring radio frequency tests of different receivers; wherein:
the intermediate frequency port of the receiver is directly connected with the port of the frequency spectrograph to form a first radio frequency link;
the audio port of the receiver is directly connected with the port of the audio analyzer to form a second radio frequency link;
the first signal source port is connected to the radio frequency port of the receiver through a first coaxial switch and a second coaxial switch in sequence to form a third radio frequency link;
a second signal source port is connected to the radio frequency port of the receiver through a third coaxial switch and the second coaxial switch in sequence to form a fourth radio frequency link;
the first signal source port is connected to the radio frequency port of the receiver sequentially through a first coaxial switch, a one-to-two power divider and a second coaxial switch to form a fifth radio frequency link;
the second signal source port is connected to the receiver radio frequency port sequentially through a third coaxial switch, the one-to-two power divider and the second coaxial switch to form a sixth radio frequency link;
the first signal source port is connected to the power meter port through the first coaxial switch and the fourth coaxial switch in sequence to form a seventh radio frequency link;
the second signal source port is connected to the power meter port through the third coaxial switch and the fourth coaxial switch in sequence to form an eighth radio frequency link;
the first coaxial switch, the second coaxial switch and the third coaxial switch each comprise at least three terminals, the fourth coaxial switch comprises at least two terminals, and the connection state of each terminal on the first coaxial switch, the second coaxial switch, the third coaxial switch and/or the fourth coaxial switch controls each radio frequency link where each terminal is located to be connected or disconnected;
and a second adjustable attenuator is also connected between the port of the power meter and the fourth coaxial switch.
2. The apparatus of claim 1, wherein the apparatus further comprises at least two load ports, a ninth radio frequency link, and a tenth radio frequency link; wherein:
the first signal source port is directly connected with a first load port to form a ninth radio frequency link, and the ninth radio frequency link is used for calibrating a radio frequency link where the first signal source port is located;
and the second signal source port is directly connected with the second load port to form a tenth radio frequency link, and the tenth radio frequency link is used for calibrating the radio frequency link where the second signal source port is located.
3. The apparatus of claim 1 or 2, wherein an attenuation member is further coupled between the second coaxial switch and the receiver rf port.
4. The apparatus of claim 3, wherein the attenuation component is a first adjustable attenuator.
5. The apparatus of claim 3, wherein the attenuation components comprise at least two fixed attenuators and at least two coaxial switches; wherein:
and the fifth coaxial switch and the sixth coaxial switch respectively comprise at least two terminals, two ends of the first fixed attenuator and the second fixed attenuator are respectively connected to different terminals of the fifth coaxial switch and the sixth coaxial switch, and the connection state of each terminal on the fifth coaxial switch and the sixth coaxial switch controls the fixed attenuator used in the attenuation part to be the first fixed attenuator or the second fixed attenuator.
6. The device of claim 2, wherein the receiver intermediate frequency port, the receiver radio frequency port, the power meter port and the load port are N-type connectors; the audio port of the receiver and the audio analyzer port adopt BNC connectors; the port of the frequency spectrograph adopts an SMA joint; the signal source port adopts an N-type connector or an SMA connector.
7. The apparatus of claim 6, wherein the first signal source port employs an SMA connector and the second signal source port employs an N-type connector.
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| CN109586810B (en) * | 2018-12-28 | 2024-03-26 | 辰测（北京）科技发展有限公司 | Distributed dynamic radio frequency test interface device and test method |
| CN109884409A (en) * | 2019-02-28 | 2019-06-14 | 广州杰赛科技股份有限公司 | Array antenna automatic testing equipment |
Citations (3)
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| CN101605005A (en) * | 2009-07-31 | 2009-12-16 | 中国电子科技集团公司第四十一研究所 | Frequency-hopping radio station indicator testing device in half-duplex pilot frequency communication |
| CN103052109A (en) * | 2012-12-06 | 2013-04-17 | 国家无线电监测中心检测中心 | Method and device for radio frequency consistency test of wireless communication terminal of public network |
| CN104519503A (en) * | 2014-12-12 | 2015-04-15 | 国家无线电监测中心检测中心 | Radio frequency link switching device for mobile communication terminal testing |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605005A (en) * | 2009-07-31 | 2009-12-16 | 中国电子科技集团公司第四十一研究所 | Frequency-hopping radio station indicator testing device in half-duplex pilot frequency communication |
| CN103052109A (en) * | 2012-12-06 | 2013-04-17 | 国家无线电监测中心检测中心 | Method and device for radio frequency consistency test of wireless communication terminal of public network |
| CN104519503A (en) * | 2014-12-12 | 2015-04-15 | 国家无线电监测中心检测中心 | Radio frequency link switching device for mobile communication terminal testing |
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