CN216371844U - OMT electrical property detects clamping device - Google Patents

Abstract

The utility model relates to the technical field of orthogonal coupler test in the communication field, in particular to an OMT electrical property detection clamping device. The device comprises: the device comprises an installation table, at least three support plates arranged at intervals along the axial direction, a first clamping assembly and a second clamping assembly; the mounting table is used for bearing the OMT, and the mounting table is arranged on the outer side surface of the first supporting plate in a vertical mode along the horizontal direction; the first supporting plate is any outermost supporting plate; the first clamping assembly is used for clamping the OMT; each support plate is provided with a bearing hole which penetrates along the axial direction, the bearing holes of all the support plates are oppositely arranged along the axial direction, and the bearing holes are used for bearing a load or a short circuit plate which is connected with a waveguide port of the OMT; the second clamping assembly is used for clamping the load or short-circuit plate in the axial direction. The utility model can improve the stability and the reliability of the test result.

Description

OMT electrical property detects clamping device

Technical Field

The utility model relates to the technical field of orthogonal coupler test in the communication field, in particular to an electrical property detection clamping device for a dual-Mode converter or an orthogonal-Mode converter (OMT).

Background

At present, OMT is widely used in microwave antennas, electronic countermeasure and microwave measuring instruments. For example, OMT is a key component of an antenna system, and its main function is to implement orthogonal polarized duplex transmission (separation and synthesis) in antenna feed, and the performance of OMT directly affects the performance of the whole antenna system. In recent years, microwave passive devices have a bandwidth which is increasing, and meanwhile, low voltage standing wave ratio, low loss and high port isolation are guaranteed, and in order to meet the requirements of modern antenna equipment, more and more novel OMTs appear.

With the continuous increase of OMT frequency, the requirement on the machining precision of the OMT is higher and higher. For example, the position accuracy requirement of the OMT waveguide port is as high as ± 0.01mm, which leads to a great increase in machining requirement and cost, and affects and restricts productivity. In order to solve the problem of machining precision, the method is particularly important for testing telecommunication energy of return loss, insertion loss, isolation and the like of the OMT. The test results of the OMT include, but are not limited to, return loss values and insertion loss values of straight-through waveguide ports, return loss values and insertion loss values of orthogonal waveguide ports, isolation values between waveguide ports, and the like.

The short circuit board and the load are required to be used for testing in the OMT testing process, the procedure is frequently changed, and the connection of each waveguide port, the connection of a testing line and the posture are easily influenced in the process of changing the short circuit board and the load. Therefore, a new clamping device for electrical performance test of OMT is needed.

The above background disclosure is only for the purpose of aiding understanding of the inventive concepts and solutions of the present invention, and it is not necessary for them to belong to the prior art of this patent application, and it should not be used for evaluating the novelty and inventive step of this application in the case that there is no clear evidence that the above contents are disclosed at the filing date of this patent application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an OMT electrical performance detection clamping device to solve at least one technical problem in the background technology.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

an OMT electrical performance test fixture comprising: the device comprises an installation table, at least three support plates arranged at intervals along the axial direction, a first clamping assembly and a second clamping assembly;

the mounting table is used for bearing the OMT, and the mounting table is arranged on the outer side surface of the first supporting plate in a vertical mode along the horizontal direction; the first supporting plate is any outermost supporting plate;

the first clamping assembly is used for clamping the OMT;

each support plate is provided with a bearing hole which penetrates along the axial direction, the bearing holes of all the support plates are oppositely arranged along the axial direction, and the bearing holes are used for bearing a load or a short circuit plate which is connected with a waveguide port of the OMT;

the second clamping assembly is used for clamping the load or short-circuit plate in the axial direction.

In some embodiments, the first clamp assembly includes a first clamp for clamping the OMT in a vertical direction and a second clamp for clamping the OMT in an axial direction.

In some embodiments, the support device further comprises an L-shaped mounting block, the L-shaped mounting block comprises a first body and a second body, the first body is fixed on the outer side surface of the first support plate, and the first clamping piece is fixed on the upper surface of the second body.

In some embodiments, the mounting table further comprises a spacer block, the spacer block is fixed on the upper surface of the mounting table, and the second clamping piece is fixed on the upper surface of the spacer block.

In some embodiments, the device further comprises a horizontally arranged base, and all the supporting plates are vertically arranged on the base.

In some embodiments, the bearing device further comprises an annular sleeve, and the annular sleeve is sleeved in the bearing hole and can slide along the axial direction.

In some embodiments, the second clamping assembly is disposed on an inner side of the first support plate.

In some embodiments, the first and second clamp assemblies comprise quick clamps.

In some embodiments, the first clamping assembly comprises at least one horizontal quick clamp and at least one vertical quick clamp; the second clamping assembly includes at least two vertical quick clamps.

In some embodiments, the mounting table further comprises angle iron, and the mounting table is fixed on the outer side surface of the first support plate through the angle iron.

The technical scheme of the utility model has the beneficial effects that:

according to the OMT electrical property detection clamping device provided by the embodiment of the utility model, one side is used for clamping an OMT to be detected, and the other side is used for installing a load or a short-circuit board (or a reflecting board) used for detection, when the load or the short-circuit board connected with a waveguide port of the OMT is installed, the installation mode is unified, the same test condition can be realized through the clamping device, better repeatability is realized, and further, when different testing personnel perform detection operation at different time, the test result is good in stability and high in reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1A is a schematic structural diagram of an OMT according to an embodiment of the present invention;

FIG. 1B is a schematic diagram of the OMT shown in FIG. 1A from another perspective;

fig. 2 is a schematic structural diagram of an OMT connected to a rectangular waveguide flange according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an OMT electrical performance testing clamping device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electrical performance testing fixture for load mounting of an OMT according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an electrical performance testing fixture for mounting a shorting plate (or a reflector plate) in an OMT according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a circular waveguide load according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a short-circuiting plate according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a mounting table, a supporting plate, an L-shaped mounting block and a base according to an embodiment of the utility model.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer and more obvious, so that those skilled in the art can better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, "plurality" means two or more, and the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the process of testing the OMT, a short-circuit board (or called a reflection board) and a load are required to be used for testing, and therefore, the procedure must be replaced in the testing process. When the procedure is replaced, the connection of each waveguide port, the connection of the test line and the posture of the test line are not affected in the process of replacing the short circuit board and the load.

In view of this, the application provides an OMT electrical performance detection clamping device, which fixes an OMT on a clamping device, and does not affect the connection of each waveguide port, the connection of a test line and the posture when replacing a reflection plate and a load to perform various electrical performance parameter tests, thereby ensuring the accuracy of the measurement.

In order to better understand the OMT electrical performance testing clamping device provided by the embodiment of the utility model, the structure of the OMT is described. Fig. 1A and fig. 1B are schematic structural diagrams of an OMT according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of an OMT connected to a rectangular waveguide flange according to an embodiment of the present invention. Fig. 1A and 1B are schematic structural diagrams of OMTs from two different viewing angles.

As shown in fig. 1A, 1B and 2, the OMT includes a body 100. The body 100 is substantially rectangular parallelepiped. The interior of the body 100 forms a waveguide cavity, and different sidewalls of the body 100 are provided with a plurality of waveguide ports.

Specifically, as shown in fig. 1A and 1B, the body 100 includes two opposite sidewalls, i.e., a first sidewall 110 and a second sidewall 120. The first sidewall 110 is provided with a through waveguide port 111 and the second sidewall 120 is provided with a circular waveguide port 121. The body 100 further comprises a third sidewall 130 connecting the first sidewall 110 and the second sidewall 120, the third sidewall 130 being provided with an orthogonal waveguide port 131.

As shown in fig. 1A and 2, the circumferential directions of the two rectangular waveguide ports, i.e., the through waveguide port 111 and the orthogonal waveguide port 131, each form a flange surface 140. The flange face 140 includes a flange mounting hole and a seal ring groove. Two rectangular waveguide flanges, i.e., a first rectangular waveguide flange 200 and a second rectangular waveguide flange 300, are mounted to the flange face 140 of the first sidewall 110 and the flange face 140 of the third sidewall 130, respectively.

Next, an OMT electrical performance detection clamping apparatus provided in an embodiment of the present invention is described.

Fig. 3 is a schematic structural diagram of an OMT electrical performance detection clamping device according to an embodiment of the present invention. Fig. 4 is a schematic diagram of the electrical performance testing fixture when the OMT is loaded. Fig. 5 is a schematic structural view of the electrical property detection clamping device when the OMT is mounted with the short circuit board (or the reflection board). It should be noted that, in order to better illustrate the OMT electrical performance testing fixture 400 of the present embodiment, fig. 4 and 5 also illustrate an OMT500 connected to a rectangular waveguide flange and two tested wave-to-wave converters 600, wherein the two wave-to-wave converters 600 are connected to the rectangular waveguide port of the OMT500 through the rectangular waveguide flange respectively. Also shown in fig. 4 is a load 700 connected to the circular waveguide port of OMT 500; also shown in fig. 5 is a shorting plate 800 (or reflector plate) connected to the circular waveguide port of OMT 500. It should be understood that the OMT500, the two wdm converters 600, the load 700, and the shorting plate 800 that connect the rectangular waveguide flanges do not necessarily form part of the OMT electrical performance testing fixture 400.

As shown in fig. 3 to 5, the OMT electrical performance testing fixture 400 includes a mounting block 410, three support plates 420 axially spaced apart, a first clamping assembly 430, and a second clamping assembly 440. The three support plates 420 are sequentially marked as a first support plate 421, a second support plate 422 and a third support plate 423 from left to right along the axial direction.

The mounting table 410 is used for bearing the OMT, the mounting table 410 is arranged along the horizontal direction, and the mounting table 410 is vertically arranged on the outer side surface of the first support plate 421. The first clamping assembly 430 is used to clamp the OMT 500. Each support plate is provided with a bearing hole 424 which penetrates along the axial direction, and the bearing holes 424 of the three support plates are oppositely arranged along the axial direction. The bearing hole 424 is used to bear the load 700 or the short-circuiting plate 800 connected to the waveguide port of the OMT. The second clamping assembly 440 serves to clamp the load 700 or the short circuit plate 800 in the axial direction.

For example, in conjunction with fig. 3 and 4, to perform an electrical performance testing procedure when using the load 700, the bearing hole 424 is used to bear the circular waveguide load 700 connected to the circular waveguide port of the OMT 500; referring to fig. 3 and 5, in order to perform an electrical performance testing process when the short circuit board 800 is used, the supporting hole 424 is used to support the short circuit board 800 connected to the circular waveguide port of the OMT500, and specifically, the supporting hole 424 of the first support plate 421 is used to support the short circuit board 800 connected to the circular waveguide port of the OMT 500.

As shown in fig. 3 to 5, in the OMT electrical performance testing clamping device 400 provided in this embodiment, on one hand, the OMT500 and the two tested waveguide coaxial converters 600 can be clamped by the mounting table 410, the first support plate 421 and the first clamping assembly 430; on the other hand, the second clamping assembly 440 and the three support plates can be used for connecting the circular waveguide port with the load 700 or the short-circuit plate 800, wherein the plurality of support plates are provided with the bearing holes 424, and the bearing holes 424 can bear the load 700, so that the load 700 can slide on the support plates in the axial direction, and thus the connection with the circular waveguide port of the OMT500 is realized, therefore, the clamping device 400 for detecting the electrical performance of the OMT provided by the embodiment has the advantages that when the load 700 connected with the circular waveguide port of the OMT500 and the short-circuit plate 800 are installed, the installation mode or the method is uniform, the same test condition can be realized through the clamping device 400, the repeatability is better, and further, when the detection operation is carried out by different testers at different times, the stability of the test result is good, and the reliability is high.

It should be noted that, in other embodiments, the number of the supporting plates may be four or even more, and the utility model is not limited thereto.

In some embodiments, as shown in fig. 3-5, the first clamp assembly 430 includes a first clamp 431 for clamping the OMT500 in a vertical direction and a second clamp 432 for clamping the OMT500 in an axial direction. In the clamped state of the OMT electrical performance detection clamping device 400, the first clamping member 431 abuts against the top surface of one of the plurality of wave transformers 600, and the second clamping member 432 abuts against the left side surface of the other of the plurality of wave transformers 600. The OMT is clamped in two orthogonal directions through the two clamping pieces, the clamping effect is more stable, the consistency of detection conditions can be guaranteed to be better in the process of replacing the working procedure, and therefore the stability and the reliability of a test result are further improved.

In some embodiments, as shown in fig. 3, the first clamping member 431 is fixed to the first support plate 421 above the mounting table 410. The second clamping member 432 is fixed to the upper surface of the mounting table 410.

In some implementations, as shown in fig. 3, the OMT electrical performance detection clamping device 400 may further include an L-shaped mounting block 450, and the first clamping member 431 is fixed to the first support plate 421 through the L-shaped mounting block 450.

Specifically, as shown in fig. 3, the L-shaped mounting block 450 includes a first body 451 and a second body 452, the first body 451 is fixed to an outer side surface of the first support plate 421, and the first clamping member 431 is fixed to an upper surface of the second body 452.

In some implementations, as shown in fig. 3, the OMT electrical performance testing fixture 400 may further include a spacer 460, and the second clamping member 432 is fixed to the upper surface of the mounting platform 410 through the spacer 460.

Specifically, as shown in fig. 3, a pad block 460 is fixed to an upper surface of the mounting table 410, and a second clamping member 432 is fixed to the upper surface of the pad block 460. It should be noted that, in order to leave mounting positions for the OMT500 and the wdm converter 600, the spacer 460 may be disposed on the outer side of the upper surface of the mounting table 410.

In some embodiments, as shown in fig. 3 and 5, the second clamping assembly 440 includes a third clamping member 441 and a fourth clamping member 442, and the third clamping member 441 and the fourth clamping member 442 are disposed on the inner side surface of the first support plate 421. Specifically, the third clamping member 441 and the fourth clamping member 442 are disposed in the circumferential direction of the bearing hole 424 on the inner side surface of the first support plate 421.

It should be noted that in other embodiments, the second clamping assembly 440 may further include three or more clamping members, and the utility model is not limited thereto.

As a non-limiting example, as shown in connection with fig. 3-5, each of the first, second, third, and fourth clamping members 431, 432, 441, 442 may include a quick clamp. For example, the first, third and fourth clamping members 431, 441, 442 may include horizontal type quick clamps, and the second clamping member 432 may include vertical type quick clamps. The OMT is clamped by the rapid clamp, the load or the short circuit plate can be clamped rapidly and conveniently, the operation difficulty of the replacement process is reduced, and therefore the detection efficiency and the stability and reliability of the detection result can be improved.

In some embodiments, as shown in fig. 3, the OMT electrical performance detection fixture 400 may further include a base 480. The base 480 is horizontally disposed, and three supporting plates 420 are vertically disposed on the base 480. Three support plates 420 may all be fixed to the base 480. Through locating base 480 with all backup pads, can guarantee the assembly stability of whole device, further improve the uniformity of testing condition, therefore further promote the stability and the credibility of test result.

In some embodiments, the mounting table 410 may be integrally formed with the first support plate 421, or the mounting table 410 may be fixed to the first support plate 421. As a non-limiting example, as shown in fig. 3, the OMT electrical performance testing fixture 400 may also include an angle iron 490. The mounting table 410 is fixed to an outer side surface of the first support plate 421 by an angle iron 490. Through angle bar 490 with mount table 410 fixed with first backup pad 421, can guarantee the assembly stability of whole device, in addition, the backup pad has the same structure, the mass production of being convenient for reduces the manufacturing cost of device.

In some embodiments, as shown in fig. 3 to 5, the OMT electrical performance testing fixture 400 further includes a circular sleeve 470, and the circular sleeve 470 is disposed in the bearing hole 424 and can slide in the axial direction. The ring sleeve 470 can be used for loading the circular waveguide load, and the circular waveguide load 700 and the OMT500 circular waveguide port can be quickly connected by sliding the ring sleeve 470 in the axial direction, so that the circular waveguide load 700 is clamped in the axial direction by the second clamping assembly 440.

As a non-limiting example, fig. 6 shows a schematic diagram of a circular waveguide load. Referring to fig. 3, 4 and 6, the circular waveguide load 700 includes a body 710 and a ring-shaped sleeve 720 sleeved outside the body 710. The annular sleeve 720 includes a sleeve 721 and an outer facing surface 722 disposed at one end of the sleeve 721 and extending circumferentially around the sleeve 721. The sleeve 721 is matched with the size of the bearing hole, and the peripheral axial sectional area of the extension surface is larger than the axial sectional area of the bearing hole. The end face of the other end of the sleeve 721 is a mating surface for mating with the circular waveguide port of the OMT, and the extension surface 722 is a pressure surface of the second clamping assembly 440. When the circular waveguide load 700 passes through the bearing holes 424 of the three bearing plates 420 and is connected to the circular waveguide port of the OMT, the second clamping assembly 440 presses the outer extension face 722 in the axial direction, so that the load is pressed in the axial direction, and the end face of the other end of the end face sleeve 721 is matched with the circular waveguide port of the OMT.

As a non-limiting example, fig. 7 shows a schematic view of the structure of the short-circuiting plate. As shown in fig. 3, 5 and 7, the short-circuiting plate 800 includes three cylindrical layers along the axial direction, a top layer 801, a middle layer 802 and a bottom layer 803 from left to right. The three-layer cylinder is tower-shaped, three step surfaces are formed by the three-layer cylinder, the three step surfaces are sequentially described from left to right, the first step surface 810, namely the top surface or the left side surface, is a reflecting surface, the second step surface 820 is a matching surface matched with the circular waveguide port of the OMT, the third step surface 830 is a surface attached to the inner side surface of the first supporting plate 421, and the bottom surface or the right side surface 840 of the short-circuit plate 800 is a clamping surface. The top layer 801 of the short-circuit board 800 is matched with the size of the circular waveguide port of the OMT, the middle layer 802 is matched with the size of the bearing hole, and the axial cross-sectional area of the bottom layer 803 is larger than that of the bearing hole. When the short circuit plate 800 passes through the bearing hole 424 of the first bearing plate 421 and is connected to the circular waveguide port of the OMT, the second clamping unit 440 axially presses the bottom surface 840 of the short circuit plate 800, so that the short circuit plate 800 is pressed in the axial direction and is matched with the circular waveguide port of the OMT.

In some embodiments, the different components are secured to each other by one or more means including, but not limited to, snapping, riveting, screwing, gluing, and the like. The present invention is not particularly limited in this regard.

In some implementations, as shown in fig. 8, rivet holes 416 and/or threaded holes 417 are provided on the mounting block 410, the support plate 420, the L-shaped mounting block 450, and the base 480 to facilitate positioning and securing of the components. Specifically, a rivet hole 416 and a threaded hole 417 are arranged at a position on the base 480 for fixing the support plate 420, so as to realize positioning and fixing between the base 480 and the support plate 420; rivet holes 416 and threaded holes 417 are arranged at positions on the first support plate 421 for fixing the mounting table 410, so as to realize positioning and fixing between the mounting table 410 and the first support plate 421; threaded holes are also provided in the mounting table 410, the support plate 420, and the L-shaped mounting block 450 at locations for securing or fixing other components to one another, such as the first clamping assembly, the second clamping assembly, the spacer block, or the angle iron. It should be noted that, threaded holes may also be provided on the first clamping assembly, the second clamping assembly, the spacer block, and the angle iron, so as to facilitate positioning and fixing between the components. Through rivet hole and the screw hole of setting in advance on the part, can promote clamping device's assembly precision to improve the credibility of testing result.

It is to be understood that the foregoing is a more detailed description of the utility model as it relates to specific/preferred embodiments and that no limitation to the specific embodiments is intended as being implied by the limitation presented herein. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the utility model, and these substitutions and modifications should be considered to fall within the scope of the present patent. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model.

In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the utility model as defined by the appended claims.

Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. One of ordinary skill in the art will readily appreciate that the above-disclosed, presently existing or later to be developed, processes, machines, manufacture, compositions of matter, means, methods, or steps, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims (10)

1. An OMT electrical performance detection clamping device, comprising: the device comprises an installation table, at least three support plates arranged at intervals along the axial direction, a first clamping assembly and a second clamping assembly;

the mounting table is used for bearing the OMT, and the mounting table is arranged on the outer side surface of the first supporting plate in a vertical mode along the horizontal direction; the first supporting plate is any outermost supporting plate;

the first clamping assembly is used for clamping the OMT;

each support plate is provided with a bearing hole which penetrates along the axial direction, the bearing holes of all the support plates are oppositely arranged along the axial direction, and the bearing holes are used for bearing a load or a short circuit plate which is connected with a waveguide port of the OMT;

the second clamping assembly is used for clamping the load or short-circuit plate in the axial direction.

2. The OMT electrical performance testing fixture of claim 1, wherein the first clamp assembly comprises a first clamp for clamping the OMT in a vertical direction and a second clamp for clamping the OMT in an axial direction.

3. The OMT electrical performance testing fixture of claim 2, further comprising an L-shaped mounting block, wherein the L-shaped mounting block comprises a first body and a second body, the first body is fixed to an outer side surface of the first support plate, and the first clamping member is fixed to an upper surface of the second body.

4. The OMT electrical performance testing fixture of claim 2, further comprising a spacer secured to an upper surface of the mounting block, wherein the second fixture is secured to the upper surface of the spacer.

5. An OMT electrical performance testing fixture according to any of claims 1 to 4 further including a horizontally disposed base, all support plates being vertically disposed on said base.

6. The OMT electrical performance testing fixture of any one of claims 1 to 4, further comprising a ring sleeve, wherein said ring sleeve is slidably disposed within said bearing hole.

7. An OMT electrical performance test fixture as claimed in any one of claims 1 to 4, wherein the second clamp assembly is provided on the inner side of the first support plate.

8. An OMT electrical performance testing fixture according to any one of claims 1 to 4 in which the first and second fixture assemblies comprise snap clamps.

9. The OMT electrical performance testing fixture of claim 8, wherein said first fixture assembly comprises at least one horizontal quick clamp and at least one vertical quick clamp; the second clamping assembly includes at least two vertical quick clamps.

10. An OMT electrical performance testing fixture according to any of claims 1 to 4 further including angle iron by which said mounting platform is secured to the outer side of said first support plate.

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