CN201607505U - Test suite for testing parameters of network signal transformer - Google Patents
Test suite for testing parameters of network signal transformer Download PDFInfo
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- CN201607505U CN201607505U CN2010201208930U CN201020120893U CN201607505U CN 201607505 U CN201607505 U CN 201607505U CN 2010201208930 U CN2010201208930 U CN 2010201208930U CN 201020120893 U CN201020120893 U CN 201020120893U CN 201607505 U CN201607505 U CN 201607505U
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Abstract
The utility model relates to a test suite for testing parameters of a network signal transformer, comprising a base, a calibration circuit board, a test circuit board and a translation circuit board. At least one translation module is arranged on the translation circuit board and is used for electrically connecting a first pair of connecting members and a second pair of connecting members on the base to a calibration pin header on the calibration circuit board during calibration operation or electrically connecting the first pair of connecting members and the second pair of connecting members on the base to a test pin header during test operation. The test suite improves the unenlightened means that the current network signal transformer tests by adopting a wire soldering mode, and has the advantages of low cost and higher test efficiency and can complete high-frequency performance test on all wire pairs of the network signal transformer by utilizing wire jumpers, and as test circuits are more fixedly connected, the test suit improves the stability of testing accuracy of high-frequency parameters.
Description
Technical field
The utility model relates to communication network, more particularly, relates to a kind of protos test suite PROTOS that is used for test network signal transformer parameter.
Background technology
In network system, need to use the network signal transformer, it comprises isolating transformer (Isolationtransformers) and common mode inhibition (common mode chokes).The network signal transformer can provide impedance matching, signal shaping and training (signal shaping and conditioning), high voltage to isolate, isolate unusual and reduce common-mode noise.The network signal transformer is as analog signal interface, wherein comprise transformation (transformer), common mode choke (Common Mode Choke) and transformer (Autotransformer) three parts that are coupled certainly, common mode choke is designed to reduce the common mode inhibition rank, in order to reduce the influence of electromagnetic interference (EMI).
At present because production technology controllability, automaticity are not high, crucial coiling, welding technology need rely on manually-operated, the consistency of performance of the feasible network signal transformer that produces is poor, thereby causes the unit for electrical property parameters of each port of network signal transformer that certain discreteness is arranged.These parameters comprise return loss (return loss), insert loss (insertion loss), go here and there around (crosstalk), inductance value, leakage inductance value and stray capacitance value (CW/W).Therefore, produce or use in usually need be to the network signal transformer in the right performance parameter of each line test, for example, to every group of line of network signal transformer to carry out return loss (return loss) test, insert loss (insertion loss) test, string is around (crosstalk) test etc.
Shown in Figure 1 is a typical network signal transformer principle figure, it comprises 8 independently transformers, each transformer comprises that one group of line is right, for example first transformer comprises that being numbered 1,2,3 and 46,47,48 line comprises that to, second transformer to be numbered 4,5,6 and 43,44,45 line right ... the 8th transformer comprises that to be numbered 22,23,24 and 25,26,27 line right.In test process, need be to every group of line to testing.
Now with to the first transformer TX
1With the second transformer TX
2Test be how example illustrates in the prior art performance parameter of test network signal transformer.
(1) signal transformer inserts loss test:
Fig. 2 is the test line graph that the test network signal transformer inserts loss.
As shown in Figure 2, wherein:
DUT: for the network signal transformer treat that survey line is right, be meant that herein (2,3) and (46,47) line is right.
BALUN: be balance-nonbalance converter, the converter of 50Ohm (non-equilibrium)-100Ohm (balance), working frequency range is 0.1MHz～100MHz.
Need before the test network analyzer is calibrated.After the calibration, the way of prior art is: use fly line to be welded to connect to the radio-frequency (RF) output end mouth (RF/Out) of network analyzer (Network Analyzer) at 2,3 two tie point places, 46,47 two tie point places use fly line to be welded to connect rf inputs mouth (RF/In) to network analyzer, read the test data on the network analyzer then.
(2) signal transformer return loss test
Fig. 3 is the test line graph of test network signal transformer return loss.
Need before the test network analyzer is calibrated.After the calibration, the way of prior art is: use fly lines to be welded to connect radio-frequency (RF) output end mouth (RF/Out) to network analyzer at 2,3 two tie point places, 46,47 two tie points use fly lines to connect 100 ohm of (Ohm) loads.Read the test data on the network analyzer then.
(3) the signal transformer test of crosstalking
Fig. 4 is the test line graph that the test network signal transformer is crosstalked.Its test be the first transformer TX
1With the second transformer TX
2Between crosstalk.
Need before the test network analyzer is calibrated.After the calibration, the way of prior art is: the first transformer TX
12,3 two tie point places use fly lines to be welded to connect radio-frequency (RF) output end mouth (RF/Out) to network analyzer, 46,47 two tie points use fly lines to connect the 100Ohm load.The second transformer TX
25,6 two tie points use fly lines to connect the 100Ohm load, 44,43 two tie point places use fly line to be welded to connect rf inputs mouth (RF/In) to network analyzer.Read the test data on the network analyzer this moment again.
Having bigger problem in the above-mentioned test mode is to adopt the fly line mode to connect, because fly line can't be fixed, the measurement numerical discretization degree that tests out is bigger, and network signal transformer pin is more, uses the fly line welding manner, and efficient is extremely low.
Therefore need to develop a kind of method and system of test network signal transformer performance parameter accurately, reliably and efficiently.
The utility model content
The technical problems to be solved in the utility model is, come test network signal transformer performance parameter to make at the above-mentioned employing fly line connected mode of prior art and the big and inefficient defective of testing producing of measurement numerical discretization degree that tests out provide a kind of protos test suite PROTOS that is used for test network signal transformer parameter.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of protos test suite PROTOS that is used for test network signal transformer parameter, comprising:
Pedestal, the first pair of web member that first balance-nonbalance converter is installed on it, links to each other with the balance output terminal of described first balance-nonbalance converter, second balance-nonbalance converter, the second pair of web member that links to each other with the balance output terminal of described second balance-nonbalance converter;
Calibration circuit board, it is provided with at least one calibration module, at least be provided with a pair of calibration row pin that links to each other by signal wire to each other in described at least one calibration module, and each is in the calibration row pin, has at least a calibration row pin selectively to link to each other with a build-out resistor by wire jumper;
Testing circuit board, it is provided with the IC socket that is used to admit network signal transformer to be measured and corresponding many to test row pin with described network signal transformer port quantity to be measured, wherein to be connected to the lead-in wire that links to each other with the corresponding port of network signal transformer to be measured in the described IC socket by signal wire respectively right for the every pair of test row's pin, and each described test row pin selectively links to each other with a build-out resistor by wire jumper;
Switching circuit board, it is provided with at least one interconnecting module, is used for when calibration operation, and the first pair of web member on the described pedestal and the second pair of web member are electrically connected to described calibration row pin on the described calibration circuit board; Or be used for when test operation, first pair of web member and second pair of web member on the described pedestal are electrically connected to described test row pin.
In protos test suite PROTOS described in the utility model, described interconnecting module comprises: insert loss test interconnecting module, return loss test adaptor module, the test adaptor module of crosstalking.
In protos test suite PROTOS described in the utility model, described testing circuit board comprises gigabit one-port network signal transformer testing circuit board, gigabit two-port network signal transformer testing circuit board and gigabit four-hole network signal transformer testing circuit board.
In protos test suite PROTOS described in the utility model, described calibration module comprises gigabit one-port network signal transformer calibration module, gigabit two-port network signal transformer calibration module and gigabit four-hole network signal transformer calibration module, and wherein the signal wire length in each calibration module equals signal wire length on the corresponding testing circuit board respectively.
In protos test suite PROTOS described in the utility model, the described first balance-nonbalance converter and second balance-nonbalance converter is separately positioned on the two sides of described pedestal, and its non-equilibrium port is protruding; Described first pair of web member and described second pair of web member are arranged on the upper surface of described pedestal.
In protos test suite PROTOS described in the utility model, the upper surface of described pedestal and described switching circuit board are provided with and are used for described switching circuit board is fixed on detent mechanism on the described pedestal.
In protos test suite PROTOS described in the utility model, described circuit board is a printed circuit board (PCB), and described signal wire is made of the conductive material that is printed on the pcb board.
In protos test suite PROTOS described in the utility model, described calibration row pin is arranged for the H type.
In protos test suite PROTOS described in the utility model, described test row pin is arranged for the H type.
In protos test suite PROTOS described in the utility model, described at least one interconnecting module comprises that two switching rows are female, and described switching row mother is mother row of single-row 10 slots.
Implement the protos test suite PROTOS that is used for test network signal transformer parameter of the present utility model, have following beneficial effect: protos test suite PROTOS of the present utility model has improved the backward means that present network signal transformer adopting bonding wire mode is tested, and it is with low cost, testing efficiency is higher, utilize wire jumper can finish the network signal transformer the test of wired right high frequency performance, because of measurement circuit connects comparatively fixingly, improved the stability of high-frequency parameter testing precision.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Shown in Figure 1 is a typical network signal transformer principle figure;
Fig. 2 is the test philosophy figure that the test network signal transformer inserts loss;
Fig. 3 is the test philosophy figure of test network signal transformer return loss;
Fig. 4 is the test philosophy figure that the test network signal transformer is crosstalked;
Fig. 5 is the synoptic diagram of the pedestal in the utility model protos test suite PROTOS;
Fig. 6 is the synoptic diagram of the switching circuit board in the utility model protos test suite PROTOS;
Fig. 7 is the synoptic diagram of the calibration circuit board in the utility model protos test suite PROTOS;
Fig. 8 A is the synoptic diagram of testing circuit board first embodiment in the utility model protos test suite PROTOS;
Fig. 8 B is the synoptic diagram of testing circuit board second embodiment in the utility model protos test suite PROTOS;
Fig. 8 C is the synoptic diagram of testing circuit board the 3rd embodiment in the utility model protos test suite PROTOS;
Fig. 9 A is according to embodiment of the present utility model, the equivalent circuit diagram when inserting the operation of loss (IL) detection calibration;
Fig. 9 B is according to embodiment of the present utility model, the row's pin wire jumper connection diagram on the testing circuit board when carrying out the IL test operation;
Fig. 9 C is according to embodiment of the present utility model, the equivalent circuit diagram when carrying out the IL test operation;
Figure 10 A is the testing principle synoptic diagram of return loss (RL);
Figure 10 B is according to embodiment of the present utility model, the equivalent circuit diagram when carrying out the operation of RL detection calibration;
Figure 10 C is according to embodiment of the present utility model, the row's pin wire jumper connection diagram on the testing circuit board when carrying out the RL test operation;
Figure 10 D is according to embodiment of the present utility model, the equivalent circuit diagram when carrying out the IL test operation;
Figure 11 A is according to embodiment of the present utility model, the row's pin wire jumper connection diagram on the testing circuit board when crosstalking (CT) test operation;
Figure 11 B is according to embodiment of the present utility model, the equivalent circuit diagram when carrying out the CT test operation.
Embodiment
In order to solve problems of the prior art, the utility model provides a cover protos test suite PROTOS, comprises pedestal, switching circuit board, calibration circuit board and testing circuit board, and connecting line (for example coaxial cable) and conversion head (for example N head, N head change the BNC head).Use this external member to cooperate network analyzer that the network signal transformer parameter is tested, can be controlled at more among a small circle measuring the numerical discretization degree, and can improve testing efficiency.Test parameter comprises: insert loss (Insertion loss is called for short IL), return loss (Return loss is called for short RL) is crosstalked (Crosstalk is called for short CT).
Below respectively each parts and method of testing thereof in the protos test suite PROTOS are described.
One, pedestal
Fig. 5 is the synoptic diagram (vertical view) of an embodiment of pedestal in the utility model protos test suite PROTOS.As shown in Figure 5, two balance-nonbalance converters (BALUN) are installed on the pedestal 100, i.e. the first balance-nonbalance converter 110 and second balance-nonbalance converter 120.The first pair of web member 121,122 that is electrically connected with the balance output terminal of described first balance-nonbalance converter 110, the second pair of web member 123,124 that is electrically connected with the balance output terminal of described second balance-nonbalance converter 120.In test and calibration operation, use coaxial cable, N head, N head to change the BNC head the non-equilibrium end of first balance-nonbalance converter 110 is connected to the rf inputs or the output terminal of network analyzer, the non-equilibrium end of second balance-nonbalance converter 120 is connected to the radio-frequency (RF) output end or the input end of network analyzer.In the present embodiment, 121,122 and second pairs of web members 123,124 of first pair of web member are conductive pole, and the upper surface that it is fixed on pedestal is arranged on four drift angles of rectangle.
In addition, on pedestal and the switching circuit board detent mechanism can also be set, be used for switching circuit board is fixed on pedestal, to keep its degree of stability.This detent mechanism can be the important actor that has internal thread, is separately positioned on the place, four angles of pedestal upper surface.Similarly, can pilot hole be set, use nut to pass pilot hole and be screwed into important actor, just switching circuit board can be fixed on the pedestal in the corresponding position of switching circuit board.
Two, switching circuit board
Fig. 6 is the synoptic diagram of the switching circuit board 200 in the utility model protos test suite PROTOS.In the present embodiment, as shown in Figure 6, switching circuit board is provided with three interconnecting modules.
In each interconnecting module, be provided with four through holes, the position and the size of 121, the 122 and second pairs of web members 123,124 of first pair of web member on its position and size and the aforementioned pedestal match.As having in first interconnecting module to have in first group of through hole T1-T4, second interconnecting module the 3rd group of through hole T9-T12 arranged in second group of through hole T5-T8, the 3rd interconnecting module.In addition, in each interconnecting module, it is female to be provided with four rows.As there being first group to arrange and have second group to arrange and have the 3rd group in female W3, W4, W9 and W10, the 3rd interconnecting module and arrange female W5, W6, W11 and W12 in female W1, W2, W7 and W8, second interconnecting module in first interconnecting module.
And in first interconnecting module, through hole T1 and T2 are connected to first and second slots of the female W1 of first row respectively by signal wire; Through hole T3 and T4 are connected to first and second slots of the female W7 of the 7th row respectively by signal wire.In second interconnecting module, through hole T5 and T6 are connected to first and second slots of the female W3 of the 3rd row respectively by signal wire; Through hole T7 and T8 are connected to first and second slots of the female W10 of the tenth row respectively by signal wire.In the 3rd interconnecting module, through hole T9 and T10 are connected to first and second slots of the female W6 of the 6th row respectively by signal wire; Through hole T11 and T12 are connected to first and second slots of the female W12 of the 12 row respectively by signal wire.
As can be seen from Figure 6, in first interconnecting module, only used mother row on the left side, i.e. the first female W1 of row and the female W7 of the 7th row; In the 3rd interconnecting module, only used mother row on the right, i.e. the 6th female W6 of row and the female W12 of the 12 row; And in second interconnecting module, last row has used mother row on the left side, promptly the 3rd arranges female W3, and following row has used mother row on the right, i.e. the female W10 of the tenth row.The design of second interconnecting module is in order to match with the wires design of testing circuit board described later, be specifically designed to the test adjacent lines to crosstalk.
The utility model is not limited to the foregoing description.Embodiment can be removed mother's row (for example arranging female W2, W8, W4, W9, W5 and W11) who does not use on the switching circuit board as an alternative.In addition, in the present embodiment, employing be that single-row 10 (1x10 position) row is female because used row mother has only utilized its front two slot, so can also select mother row who has only two slots for use.Certainly also can also select other spread pattern (as biserial, three row) but have mother row of two slots at least.In addition, three interconnecting modules on the switching circuit board can be integrated on the circuit board, also can make three independent switching circuit boards respectively.
Need to prove, in the present embodiment, select a plurality of 1x10 position female benefit of row also to be and to play layer circuit board in the support with it as support member in calibration or test operation.
Three, calibration circuit board
Fig. 7 is the synoptic diagram of the calibration circuit board 300 in the utility model protos test suite PROTOS.As shown in Figure 7, in the present embodiment, calibration circuit board is provided with three calibration modules: gigabit one-port network signal transformer calibration module, gigabit two-port network signal transformer calibration module and gigabit four-hole network signal transformer calibration module.Difference therebetween only is signal wire length difference wherein, respectively with following length corresponding (being equal to) with the signal wire on gigabit one-port network signal transformer testing circuit board, gigabit two-port network signal transformer testing circuit board and the gigabit four-hole network signal transformer testing circuit board described.
In the present embodiment, be provided with two pairs of calibration row pins that link to each other by signal wire to each other in each calibration module, embodiment also can only be provided with a pair of calibration row pin in each calibration module as an alternative.
As shown in Figure 7, what present embodiment adopted is row's pin (V1-V12) that 4-2-4 arranges, and promptly left and right two row are respectively 4 contact pins, and middle one classifies the arrangement mode of 2 contact pins as, in this article this arrangement mode is called " H type " and arranges.
In first calibration module (being gigabit one-port network signal transformer calibration module), first row's pin V1 links to each other with second row's pin V2 by signal wire.Specifically, 2# among first row's pin V1 and 3# contact pin are connected to 23# and the 22# contact pin of second row's pin V2 respectively by signal wire; 6# among first row's pin V1 and 5# contact pin are connected to 19# and the 20# contact pin of second row's pin V2 respectively by signal wire.8# among the 3rd row's pin V3 and 9# contact pin are connected to 17# and the 16# contact pin of the 4th row's pin V4 respectively by signal wire; 12# among the 3rd row's pin V3 and 11# contact pin are connected to 13# and the 14# contact pin of the 4th row's pin V4 respectively by signal wire.In addition, first row's pin V1 below also is provided with two 2 row's pin H1, H2 arranged side by side, there is a contact pin to link to each other by signal wire among row's pin H1 with one of middle two contact pins of first row's pin V1, another contact pin in the middle of contact pin among the row pin H2 and the first row's pin V1 in two links to each other by signal wire, with between those continuous two contact pins of first row's pin V1 is not connected one 100 ohm build-out resistor R1 among row pin H1 and the H2.Equally, also be provided with two 2 row's pin H3, H4 arranged side by side below the 3rd row's pin V3, wherein the connected mode of the connected mode of contact pin connected mode among contact pin and the 3rd row's pin V3 and build-out resistor R2 and first row's pin V1, row pin H1 and H2 is identical.
The connected mode of each row between pin and first calibration module is identical in second calibration module (being gigabit two-port network signal transformer calibration module) and the 3rd calibration module (being gigabit four-hole network signal transformer calibration module), and just the length of signal wire between the length of signal wire between the 5th row's pin V5 and the 6th row's pin V6, the 7th row pin V7 and the 8th row's pin V8, length and the 11 that the 9th row pin V9 and the tenth arranges signal wire between the pin V10 are arranged pin V11 and the 12 and arranged different on the length of signal wire between the pin V12 and first calibration module.Therefore, no longer it is repeated in this description herein.
Have, each is to calibration row's pin (for example V1 and V2, V3 and V4 again ... or V11 and V12) in, female (for example W1 and W7, W2 and W8 of two rows in the distance of two rows between the pin and the same row of interconnecting module ... W6 and W12) between distance equate.Adjacent two calibration row's pins (for example V2 and V4, V6 and V8 ... or V10 and V12) between distance, with two adjacent rows among the same row of interconnecting module female (for example W1 and W2, W3 and W4 ... W11 and W12) between distance equate.Make on the calibration circuit board that two contact pins of row can insert in the female associated socket of switching circuit board row in the middle of every pair of calibration row pin.
As selection, three calibration modules on the calibration circuit board can be integrated on the circuit board, also can make three independent calibration circuit board respectively.
Four, testing circuit board
Fig. 8 A is testing circuit board first embodiment in the utility model protos test suite PROTOS, the i.e. synoptic diagram of gigabit two-port network signal transformer testing circuit board 410.Shown in Fig. 8 A, testing circuit board 410 is provided with and is used to admit the IC socket 411 of network signal transformer to be measured and arranges pin U1-U5, U2-U6, U3-U7, U4-U8 with the corresponding 4 pairs of tests of described network signal transformer port quantity to be measured.What present embodiment adopted is row's pin that 4-2-4 arranges, and promptly left and right two row are respectively 4 contact pins, and middle one classifies the arrangement mode (in this article this arrangement mode being called " H type " arranges) of 2 contact pins as.Wherein two contact pins link to each other with the corresponding extension line of IC socket by signal wire respectively in the middle of left and right two row of each row's pin.When the network signal transformer being inserted in the IC socket, its each treat that the right end points of survey line is connected to respectively on the contact pin of identical numbering of this 4 couple row pin.For example, (2,3) of network signal transformer and (46,47) line to (5,6) and (43,44) line of the 2#, the 3# that are connected to the first and the 5th row pin U1 and U5,46#, 47# contact pin, network signal transformer to be connected to the first and the 5th 5#, the 6# that arranges pin U1 and U5,43#, 44# contact pin ... (23,24) of network signal transformer and (25,26) line are to being connected to 23#, 24#, 25#, the 26# contact pin of the 4th and the 8th row pin U4 and U8.In addition, in each row's pin, be connected with one 100 ohm build-out resistor R between first of the left side one row row pin and the 4th contact pin; Similarly, be connected with one 100 ohm build-out resistor R between first of the right one row row pin and the 4th contact pin.What connect between first of left and right two row rows' pins and the 4th contact pin in the present embodiment, is same resistance.Scheme also can be provided with two resistance as an alternative, i.e. one of left column, one of stone row.
Have, each is to test row's pin (for example U1 and U5, U3 and U4 again ... or U11 and U12) in, female (for example W1 and W7, W2 and W8 of two rows in the distance of two rows between the pin and the same row of interconnecting module ... W6 and W12) between distance equate.Adjacent two test row's pins (for example U1 and U2, U2 and U3 ... or U7 and U8) between distance, with two adjacent rows among the same row of interconnecting module female (for example W1 and W2, W3 and W4 ... W11 and W12) between distance equate.Make on the testing circuit board that two contact pins of row can insert in the female associated socket of switching circuit board row in the middle of every pair of test row pin.
Among Fig. 8 A, the wire jumper index map when 3 square frames on the right are respectively test insertion loss (IL), return loss (RL) and crosstalk (CT).
Fig. 8 B is testing circuit board second embodiment in the utility model protos test suite PROTOS, the i.e. synoptic diagram of gigabit one-port network signal transformer testing circuit board 420.Except port number than gigabit two-port network signal transformer port lack, signal wire is shorter, each network signal transformer to be measured only dispose two pairs row pins, other connected mode is identical with gigabit two-port network signal transformer testing circuit board, repeats no more herein.
Fig. 8 C is testing circuit board the 3rd embodiment in the utility model protos test suite PROTOS, the i.e. synoptic diagram of gigabit four-hole network signal transformer testing circuit board 430.Except port data is more than gigabit two-port network signal transformer port, signal wire is longer, eight pairs of each network signal transformer configuration to be measured are arranged the pin, other connected mode is identical with gigabit two-port network signal transformer testing circuit board, repeats no more herein.
Five, test mode
Below all describe for example with 48 pin (pin) gigabit twoport pad signal transformer testing.
(1) inserts loss (Insertion Loss is called for short IL) test
The IL test philosophy as shown in Figure 2.Test philosophy simplified summary: the signal source (output be sinusoidal signal) of introducing certain voltage amplitude E1 by network analyzer, the DUT that flows through (is 2,3 pins of 48pin gigabit twoport pad signal transformer at this, 46,47 pins), energy has certain loss, the back flows into network analyzer, and statistics voltage magnitude this moment is E2, promptly refers to import amplitude voltage ratio with output signal: db=20log (E1/E2) and insert loss, represent linear module with the db value, represent decay with "-".
After this test data has promptly reflected first pair of circuit of the DUT that flows through, the energy of loss, the DUT inner structure is as shown in Figure 1.
When using protos test suite PROTOS of the present utility model to test, at first switching circuit board is fixed on the pedestal, nut passes pilot hole and is screwed in the internal thread of important actor and tightens.As previously mentioned, testing circuit board is provided with three interconnecting modules.First module is used in IL test, and it comprises that first group of through hole T1-T4 and first group arrange female W1, W2, W7 and W8.Use connecting line and conversion head respectively the non-equilibrium end of first balance on the pedestal-nonbalance converter 110 and second balance-nonbalance converter 120 to be connected to the radio frequency output and the input interface of network analyzer, differential signal source will be exported from T1, T2, flow into the AP part of the female W1 of 1 * 10 row, signal can flow into last layer plate (calibration circuit board or gigabit transformer testing circuit board) like this, signal at the last layer plate current behind DUT, get back to the AP part of the female W7 of this testing circuit board 1 * 10 row at last, flow back into network analyzer by T3, T4.
When the IL detection calibration, two contact pins in centre that the 5th row pin V5 and the 6th of second calibration module (being gigabit two-port network signal transformer calibration module) of calibration circuit board is arranged pin V6 are respectively in the associated socket (being respectively first, second slot of W7 and W1 in the present embodiment) of the female W7 of the row of insertion and W1, and is connected with upper and lower two contact pins of centre respectively with jumping 23#, the 22# contact pin of cap with the left side among the 6th row's pin V6, the 5th 2#, the 3# contact pin of arranging the left side among the pin V5 is connected with upper and lower two contact pins of centre respectively.Perhaps, be connected with upper and lower two contact pins of centre respectively, the 5th 5#, the 6# contact pin of arranging the right among the pin V5 is connected with upper and lower two contact pins of centre respectively with jumping 19#, the 20# contact pin of cap with the right among the 6th row's pin V6.Like this, differential signal flows into last layer (calibration circuit board) by the AP on the female W1 of switching circuit board first row from switching circuit board, connect the back through wire jumper and flow into AP (referring to Fig. 7) on the female W7 of switching circuit board the 7th row, flow back to network analyzer after entering switching circuit board by signal wire.
The effect that finally reaches is shown in Fig. 9 A.
After finishing, the IL calibration begins to carry out the IL test.Take off calibration circuit board, change gigabit two-port network signal transformer testing circuit board.Shown in Fig. 9 B, with test network signal transformer (2,3) and the right IL of (46,47) line is example, two contact pins that first pair of test row pin U1, the centre one of U5 are listed as insert respectively in the associated socket of arranging female W7 and W1 on the switching circuit board, and is connected with upper and lower two contact pins of middle row respectively with jumping 47#, the 46# contact pin of cap with the left side among the 5th test row pin U5,3#, the 2# contact pin on the left side among the first test row pin U1 is connected with middle one upper and lower two contact pins that are listed as respectively.Differential signal flows into from switching circuit board by AP1, and signal flow flows out from AP2 behind signal transformer, flows into network analyzer at last.The final effect that realizes is shown in Fig. 9 C.
(2) return loss (Return Loss is called for short RL) test
The RL test philosophy: return loss is meant the impedance of determinand and the gap ratio of normal impedance, or to the reflectance of input signal.Return loss is to be used for match grade between definition source (source) and load (load) impedance.Return loss also reflects the total amount of institute's off-energy in reflection process.Do not cause reflected energy consumption can reduce the work efficiency of system and produce noisy noise owing to impedance matches.
Figure 10 A is depicted as the testing principle synoptic diagram of return loss (RL).Wherein, a1 represents input signal, b1 representative reflection back output signal.
Computing formula: S11=b1/a1
The RL of port one (dB)=-20log (| S11|).
The main points that will realize during test are: (1) transformer 2,3 lines are to the access network analyser.(2) 46,47 lines of opposite side correspondence are to inserting 100 ohm load.
Switching circuit board has been divided into three interconnecting modules, and the RL test can be used first interconnecting module or the 3rd interconnecting module.For example, when using first interconnecting module test, after using the good built-up circuit plate of fixed by nut, differential signal source will be exported from T1, T2, flow into the AP part of the female W1 of first row, signal can flow into last layer plate (calibration circuit board or gigabit transformer testing circuit board) like this, signal at the last layer plate current after the DUT load, reflected signal is got back to the AP part of the female W1 of this testing circuit board first row at last, flows back into network analyzer by T1, T2.
When the RL detection calibration, two contact pins in centre of the 5th row pin V5 of second calibration module (being gigabit two-port network signal transformer calibration module) of calibration circuit board and the 6th row's pin V6 are inserted switching circuit board the 7th and first respectively to be arranged in the associated socket of female W7 and W1, and is connected with upper and lower two contact pins of middle row respectively with jumping 23#, the 22# contact pin of cap with the 6th row's pin V6 left side, will arrange two contact pin jumper connections of pin H5, and use the jumping cap will arrange two contact pin jumper connections of pin H6 with jumping cap.
What the RL calibration was used is the V5 part, and connected mode uses the jumping cap to realize according to the wire jumper indication: calibrating mode: Open (open circuit), Short (short circuit), Load (load).Shown in Figure 10 B.
After finishing, the RL calibration begins to carry out the RL test.Take off calibration circuit board, change gigabit two-port network signal transformer testing circuit board.Shown in Figure 10 C, with test network signal transformer (2,3) and (46,47) the right RL of line is an example, with first couple of test row pin U1, two contact pins in the centre of U5 insert respectively on the switching circuit board in the associated socket of the 7th and first female W7 of row and W1, and with jumping the 47# of cap with the left side among the 5th test row pin U5, the 46# contact pin respectively with middle row on, following two contact pins connect, with jumping cap first contact pin jumper connection of the 3# contact pin and the left side with the left side among the first test row pin U1, and with jumping cap the 4th contact pin jumper connection of the 2# contact pin and the left side, to insert 100 ohm build-out resistor with the left side among the first test row pin U1.
Differential signal flows into from switching circuit board by AP1, uses according to the indication of Return loss (RL) wire jumper and jumps the cap connection, and signal flow is behind signal transformer, and reflected signal flows back to from AP1, flows into network analyzer at last.The final effect that realizes is shown in Figure 10 D.
(3) (Crosstalk, the be called for short CT) test of crosstalking
Switching circuit board has been divided into three interconnecting modules, 5,6 and 43,44 lines of 2,3 and 46,47 lines pair of test first transformer and second transformer between crosstalk the time, use the first or the 3rd interconnecting module, and 8,9 and 40,41 lines of testing 5,6 and 43,44 lines pair of second transformer and the 3rd transformer between crosstalk the time, use second interconnecting module, by that analogy.That is to say, if the two adjacent groups line to being to be connected with on a pair of test row pin, then uses the first or the 3rd interconnecting module to test crosstalking therebetween; If the two adjacent groups line to being connected on adjacent two couple test row pin, then uses second interconnecting module to test crosstalking therebetween.
Now with 8,9 and 40,41 lines of 5,6 and 43,44 lines of testing second transformer pair and the 3rd transformer between to crosstalk be that example illustrates.Second interconnecting module comprises that second group of through hole T5-T8 and second group arrange female W3, W4, W9 and W10.When the CT detection calibration, two contact pins of row in the middle of the 7th row pin V7 of second calibration module (being gigabit two-port network signal transformer calibration module) of calibration circuit board and the 6th row's pin V6 are inserted respectively in the associated socket of row mother W10 on the switching circuit board and W3.After using the good built-up circuit plate of fixed by nut, differential signal source will be exported from T5, T6, flow into the AP part of the female W3 of the 3rd row, signal can flow into last layer plate (calibration circuit board or gigabit transformer testing circuit board) like this, signal at the last layer plate current behind signal transformer, the AP part that coupled signal is got back to the female W10 of this testing circuit board the tenth row at last by the adjacent signals passage flows back into network analyzer by T7, T8.
Calibrating mode is the same with inserting the loss test calibrating mode, repeats no more herein.
After finishing, the CT calibration begins to carry out the CT test.Take off calibration circuit board, change gigabit two-port network signal transformer testing circuit board.
With test network signal transformer (5,6), (43,44) line pair and (8,9), (40,41) line between to crosstalk be example, shown in Figure 11 A, in the associated socket with the female W3 of row on the two contact pins insertions in the centre switching circuit board of the 5th row's pin U5 in first pair of test row pin, in the associated socket with the female W10 of row on the two contact pins insertions in the centre switching circuit board of second row's pin U2 in second pair of test row pin.And with jump the 43# of cap with the right among the 5th test row pin U5,44# contact pin respectively with two contact pin jumper connections of middle row, with the 8# on the left side among the second test row pin U2,9# contact pin respectively with two contact pin jumper connections of middle row.With jumping cap first contact pin jumper connection of 5# contact pin and the right, and with jumping cap, to insert 100 ohm build-out resistor with the 4th the contact pin jumper connection of 6# contact pin and the right on the right of among the first test row pin U1 with the right among the first test row pin U1.With jumping cap first contact pin jumper connection of 41# contact pin and the left side, and with jumping cap the 4th contact pin jumper connection of the 40# contact pin and the left side, to insert 100 ohm build-out resistor with the left side among the 6th row of the test pin U6 with the left side among the 6th test row pin U6.
Differential signal flows into from testing circuit board by AP1, uses according to the indication of Crosstalk wire jumper and jumps the cap connection, and signal flow is behind signal transformer, and coupled signal flows back to from AP2, flows into network analyzer at last.The final effect that realizes is shown in Figure 11 B.
Need to prove, mother row on the switching circuit board of mentioning before can be with other replacement scheme, for calibration circuit board and testing circuit board, also can select other cabling scenario and/or select row's pin of other arrangement mode, as long as satisfy: can by switching circuit board with the balance end of the balance-nonbalance converter on corresponding contact pin on the calibration circuit board and the pedestal be electrically connected, by switching circuit board respectively on the testing circuit board each treated survey line to or adjacent lines pair and pedestal on the balance end of balance-nonbalance converter be electrically connected.For example, available two single-row 6 or more row's pin of multidigit come the alternative measurements circuit board and or testing circuit board on row's pin of arranging of H type.Certainly, in this case, the female position of row also needs to adjust accordingly on the switching circuit board, this part the female position of row of the test adaptor module of especially crosstalking.Have again, it is also noted that on the calibration circuit board that the length of signal wire in each calibration module should be identical with the signal wire length on the corresponding testing circuit board.
In addition, the first pair of web member and second pair of web member also can realize that in this case, the through hole on the switching circuit board can substitute with row's pin with the row mother on the pedestal, and make its position should be corresponding with the female position of the row on the pedestal.
In embodiment of the present utility model, circuit board in the protos test suite PROTOS is selected printed circuit board (PCB) (pcb board), and wherein signal wire is made of the conductive material that is printed on the pcb board, thereby stable performance, superior, the high conformity of transmission performance.
The utility model provides a kind of protos test suite PROTOS that is used for test network signal transformer high-frequency parameter, has solved existing test mode efficient, precision is lower, testing reliability, the problem that stability is not high.
Claims (10)
1. a protos test suite PROTOS that is used for test network signal transformer parameter is characterized in that, comprising:
Pedestal, the first pair of web member that first balance-nonbalance converter is installed on it, links to each other with the balance output terminal of described first balance-nonbalance converter, second balance-nonbalance converter, the second pair of web member that links to each other with the balance output terminal of described second balance-nonbalance converter;
Calibration circuit board, it is provided with at least one calibration module, at least be provided with a pair of calibration row pin that links to each other by signal wire to each other in described at least one calibration module, and each is in the calibration row pin, has at least a calibration row pin selectively to link to each other with a build-out resistor by wire jumper;
Testing circuit board, it is provided with the IC socket that is used to admit network signal transformer to be measured and corresponding many to test row pin with described network signal transformer port quantity to be measured, wherein to be connected to the lead-in wire that links to each other with the corresponding port of network signal transformer to be measured in the described IC socket by signal wire respectively right for the every pair of test row's pin, and each described test row pin selectively links to each other with a build-out resistor by wire jumper;
Switching circuit board, it is provided with at least one interconnecting module, is used for when calibration operation, and the first pair of web member on the described pedestal and the second pair of web member are electrically connected to described calibration row pin on the described calibration circuit board; Or be used for when test operation, first pair of web member and second pair of web member on the described pedestal are electrically connected to described test row pin.
2. protos test suite PROTOS according to claim 1 is characterized in that, described interconnecting module comprises: insert loss test interconnecting module, return loss test adaptor module, the test adaptor module of crosstalking.
3. protos test suite PROTOS according to claim 1, it is characterized in that described testing circuit board comprises gigabit one-port network signal transformer testing circuit board, gigabit two-port network signal transformer testing circuit board and gigabit four-hole network signal transformer testing circuit board.
4. protos test suite PROTOS according to claim 3, it is characterized in that, described calibration module comprises gigabit one-port network signal transformer calibration module, gigabit two-port network signal transformer calibration module and gigabit four-hole network signal transformer calibration module, and wherein the signal wire length in each calibration module equals signal wire length on the corresponding testing circuit board respectively.
5. protos test suite PROTOS according to claim 1 is characterized in that the described first balance-nonbalance converter and second balance-nonbalance converter is separately positioned on the two sides of described pedestal, and its non-equilibrium port is protruding; Described first pair of web member and described second pair of web member are arranged on the upper surface of described pedestal.
6. protos test suite PROTOS according to claim 5 is characterized in that, the upper surface of described pedestal and described switching circuit board are provided with and are used for described switching circuit board is fixed on detent mechanism on the described pedestal.
7. protos test suite PROTOS according to claim 1 is characterized in that, described circuit board is a printed circuit board (PCB), and described signal wire is made of the conductive material that is printed on the pcb board.
8. protos test suite PROTOS according to claim 1 is characterized in that, described calibration row pin is arranged for the H type.
9. protos test suite PROTOS according to claim 1 is characterized in that, described test row pin is arranged for the H type.
10. protos test suite PROTOS according to claim 1 is characterized in that, described at least one interconnecting module comprises that two switching rows are female, and described switching row mother is mother row of single-row 10 slots.
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| CN2010201208930U CN201607505U (en) | 2010-02-25 | 2010-02-25 | Test suite for testing parameters of network signal transformer |
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| CN103513067A (en) * | 2013-10-09 | 2014-01-15 | 中江县凯讯电子有限公司 | Network transformer detecting frame mechanism |
| CN103852662A (en) * | 2012-12-07 | 2014-06-11 | 上海华虹宏力半导体制造有限公司 | Method for extracting model parameters of four-port transformer by using two-port network analyzer |
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| CN107505515A (en) * | 2017-07-10 | 2017-12-22 | 华南农业大学 | Network transformer LCR measuring methods and device based on network actual transmission signal |
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| CN116381356A (en) * | 2023-05-26 | 2023-07-04 | 河北北芯半导体科技有限公司 | Balance device testing device and testing method |
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