CN102262187A - Device and method for testing and compensating frequency characteristics of power sensor - Google Patents
Device and method for testing and compensating frequency characteristics of power sensor Download PDFInfo
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- CN102262187A CN102262187A CN2010101800044A CN201010180004A CN102262187A CN 102262187 A CN102262187 A CN 102262187A CN 2010101800044 A CN2010101800044 A CN 2010101800044A CN 201010180004 A CN201010180004 A CN 201010180004A CN 102262187 A CN102262187 A CN 102262187A
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Abstract
The invention relates to a device and a method for testing and compensating, in particular to a device and a method for testing and compensating frequency characteristics of a power sensor. The device comprises a frequency characteristic tester and a power sensor testing and compensating small box. Resistance and capacitance jacks of a debugging and compensating network and diode jacks X5 and X6 are arranged on a panel of the testing and compensating small box. A radio frequency connector is arranged on the small box near the side surfaces of the jacks of the debugging and compensating network. The radio frequency connector is connected with a high-frequency signal output end of the frequency characteristic tester. A direct current output connector is arranged on a side surface near the diode jacks. The direct current output connector is connected with an input end of a frequency characteristic tester. An input end of the debugging and compensating network is connected with the radio frequency connector. An output end of the debugging and compensating network is connected with the diode jack X5. The diode jack X6 is connected with the direct current output connector. According to the device and the method disclosed by the invention, a high-efficiency solution for designing and debugging the power sensor is provided; the debugging problem is reduced; and properties of products are improved.
Description
Technical field
The present invention relates to a kind of test compensation system and method thereof, particularly a kind of power sensor frequency characteristic test compensation system and method thereof that is used for high-power transmitter.
Background technology
The detection of high-power transmitter output power is crucial to the operate as normal and the protection of transmitter.Usually insert directional coupler or voltage divider takes out suitable high frequency output signal at the output terminal of transmitter, after corrective network, be transformed into d. c. voltage signal, deliver to indicating circuit again or microprocessor is handled by detector diode.Before entering practicality, must carry out the debugging and the calibration of pointing accuracy and frequency response to detector diode and compensating circuit thereof.This need carry out on complete machine usually.Earlier transmitter is received in the fictitious load of corresponding power by the power detection instrument of a station symbol standard, left rated power then, respectively the performance number of the power of recorder indication and the indication of this machine.In operating frequency range, to open the Frequency point more than 10 at least, just can find out the variation tendency of frequency characteristic.Adjust the frequency response of detecting circuit by the parameter of adjusting the corrective network circuit component, calibrate its pointing accuracy by the voltage divider of adjusting after the detecting circuit.Debugging to frequency response is carried out very smoothly sometimes, and is but quite difficult sometimes, no matter how the parameter of corrective network adjusted, and all is difficult to obtain ideal results.
High-power transmitter generally adopts directional coupler as power detection module, is used for the power indication and the fault detect of transmitter.Directional coupler can adopt different detections and accessory circuit thereof, but its detection principle is basic identical, for more intuitive understanding, we are referred to as " power sensor " with directional coupler or other high frequency sampling circuit together with their detection and accessory circuit (corrective network) thereof.The typical circuit structure of existing directional coupler power detection module as shown in Figure 1, mainly by radio frequency sampling circuit 1, corrective network 2 and detection and filtering circuit 3 three parts constitute.Radio frequency sampling 1 is made up of inductance L 1 current transformer M that constitutes and the voltage divider sample circuit that comprises capacitor C 1, C2.Through suitable parameter adjustment, two kinds of high-frequency signals that sampled signal stack back output is directly proportional with incident wave or reflection wave.The high-frequency signal of radio frequency sampling circuit output is through diode V1 detection, delivers to DC meter to show the power of transmitter again after filtering circuit that C4, R4 form is level and smooth.Because the inconsistency of diode junction capacitance and other parameter, the detection frequency characteristic of different diodes differs very big, what have is level, being of having risen or descended, and rising or decline scope are also inequality, need between sample circuit and detector diode V1 a corrective network be set and adjust.Corrective network generally is made of divider resistance R3, R4 and building-out capacitor C3.Its essence is that by the RC parallel circuit high-frequency signal of different frequency is had different resistance values, thereby the frequency high-side signal is promoted compensation (detection characteristic of supposition diode itself is high-end decline).Finally make signal demodulator output amplitude unanimity to different frequency.Because the inconsistency of the detection frequency characteristic of diode, this corrective network can't be designed to the circuit of unified parameter, can only power on by start and debug preparation, and frequency is debugged and is measured one by one, comprise and change resistance, electric capacity, even detector diode.The length of debug time, power consumption is big, well imagines, and needs abundant commissioning experience.And existing diode standard does not still have the index of relevant detection frequency characteristic, does not more have the method and apparatus of test diode detection frequency characteristic.
Along with high-power transmitter is more and more higher to the requirement of power sensor accuracy of detection and direct current detection frequency characteristic, existing design, debugging technique have been difficult to satisfy the needs of production and debugging.Therefore need a kind of new method that comprises design, processing and manufacturing and debugging technique,, and improve production efficient in order to the properties of product of the power sensor in the raising directional coupler.
Because the above-mentioned defective that above-mentioned existing high-power transmitter exists during power sensor is produced, the design people is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation test philosophy, actively studied innovation, in the hope of founding a kind of power sensor frequency characteristic test compensation system and method thereof, in order to the properties of product of enhancing power sensor, and improve production efficient.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
Technical matters to be solved by this invention is at the above-mentioned deficiency of prior art, to provide a kind of power sensor frequency characteristic test compensation system and method thereof.
The technical matters of purpose of the present invention and solution is to adopt following technical scheme to realize.A kind of power sensor frequency characteristic test compensation system according to the present invention's proposition, comprise frequency-characteristic measuring-testing instrument and power sensor test compensation capsule (being called for short test compensation capsule), the panel of described test compensation capsule is provided with the resistance and the electric capacity jack of debugging corrective network, diode jack X5, X6; Also be provided with input impedance matching circuit, filter network in the described capsule; Described capsule is provided with the radio frequency connector of the high-frequency signal output terminal that connects described frequency-characteristic measuring-testing instrument near the jack side of debugging corrective network; Be provided with the direct current out connector of the input end that connects described frequency-characteristic measuring-testing instrument near diode jack side; The input end of described debugging corrective network connects described radio frequency connector by described input impedance matching circuit, and its output terminal connects described diode jack X5, and described diode jack X6 connects and connects described direct current out connector by described filter network.
Power sensor frequency characteristic test compensation system of the present invention can also be further achieved by the following technical measures.
Aforesaid power sensor frequency characteristic test compensation system, wherein said frequency-characteristic measuring-testing instrument is sweep generator or scalar network analyzer, and the frequency range of a. instrument must cover the operating frequency range of detecting circuit; B. instrument must be provided with detection input interface outside at least one road; C. the vertical resolution of instrument demonstration is better than every lattice 1dB.
Aforesaid power sensor frequency characteristic test compensation system also is provided with hilted broadsword two position conversion switch S1, double-pole two position conversion switch S2 on the panel of wherein said test compensation capsule, also is provided with reference diode in the described capsule.The lock seat S1-1 of the output order cutter two position conversion switch S1 of described debugging corrective network, the tool rest S1-3 of described hilted broadsword two position conversion switch S1 connects described diode jack X5, and the lock seat S1-2 of described hilted broadsword two position conversion switch S1 connects described input impedance matching circuit; Described reference diode is in parallel with described diode jack X5, X6 by described double-pole two position conversion switch S2.
Aforesaid power sensor frequency characteristic test compensation system, the radio frequency connector of wherein said test compensation capsule is the radio frequency socket of N type or BNC type or other type; Described direct current out connector is BNC socket or independent binding post or other terminal formation.
Aforesaid power sensor frequency characteristic test compensation system, wherein said reference diode are the detector diodes that has in the high-power transmitter operating frequency range near the horizontal frequency characteristic.
The present invention also provides a kind of method of using said apparatus to carry out the compensation of power sensor frequency characteristic test, may further comprise the steps:
The 1-1 test prepares to connect sweep generator and test compensation capsule, do not take over what diode between X5, X6 jack on the test compensation capsule, double-pole two position conversion switch S2 are with the reference diode place in circuit, hilted broadsword two position conversion switch S1 select test to connect input matching network, the detection frequency characteristic of test diode;
The 1-2 instrument is provided with swept-frequency signal output attenuatoin 0dB, and swept frequency range is set at working frequency range, and vertical resolution is selected the 1dB/ degree;
1-3 adjusts the perpendicular displacement knob of sweep generator input signal, and the input signal curve is moved on to correct position, and the low side of curve is alignd with certain bar horizontal scale line;
If the high low side response error of 1-4 analysis and judgement curve illustrates that then instrument and whole test system are working properly within 0.5dB, can carry out next step; If there is not curve to occur, perhaps the curve error of Xian Shiing is very bad, and then expression system breaks down, and needs to check whether tie cable is reliable, and whether instrument breaks down, and carries out next step after fixing a breakdown;
1-5 checks the corrective network path, and whether normal hilted broadsword two position conversion switch S1 are with the corrective network place in circuit, and capacitor and divider resistance are inserted in the corrective network, and regulating capacitor should be able to be transferred to level with response detection frequency family curve; If it is inoperative or transfer less than smooth to regulate variable condenser, then belong to fault, should check whether the contact of each element of corrective network is good, and whether parameter is accurate, and fault is got rid of;
2-1 disconnects reference diode and corrective network, inserts measured diode measured diode is inserted diode jack X5 and the X6 that tests compensation system, with switch S 2 reference diode is disconnected; Switch S 1 is selected test, and obstructed over-compensation network directly connects input impedance matching circuit;
2-2 measures the measured diode detection frequency family curve of not compensated, and concrete method of adjustment is with step 1-3;
2-3 judges that according to the curve tilt condition that sweep generator shows whether the measured diode frequency characteristic is qualified, qualified, then enters step 3; Defective, get back to the measured diode that 2-1 more renews;
Frequency response curve shape that step 3, the parameter of determining each element of corrective network show according to sweep generator and high, the minimum difference in the frequency range are chosen suitable capacitance resistance parameter, make curve after the compensation near level.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, power sensor frequency characteristic test compensation system of the present invention and method thereof can reach suitable technical progress and practicality, and have the extensive value on the industry, and it has following advantage at least:
1, power sensor frequency characteristic test compensation system of the present invention, avoids waste saving cost aspect the buying of components and parts for the screening of high frequency detection diode provides means of testing; Shortening the components and parts delivery cycle aspect the production of power sensor, avoid the construction delay that components and parts caused of purchasing on a barter basis.For the design of power sensor, debugging provide solution efficiently, reduced debugging difficulty, improved properties of product.Through analysis-by-synthesis, high-power transmitter power sensor test macro has very high economic and social benefit.
2, power sensor frequency characteristic test compensation system of the present invention and method thereof provide total solution for the design of power sensor, the screening of former device and high-power transmitter output response debugging.
3, can only carry out on transmitter the debugging of directional coupler direct current detection frequency response, the independent debug system of the disengaging transmitter that the present invention develops more can adapt to the needs of mass production in the past.The detecting circuit of directional coupler is transplanted in the test accessories, detecting circuit is detected and debugs.After finishing, debugging will comprise that a whole set of power sensor of diode and corrective network thereof is installed in the directional coupler, reinstalls transmitter and verifies.Can only can transfer on the small-signal instrument in the debugging of carrying out on the high-power transmitter before making like this and carry out, save a large amount of human and material resources and electric energy, reduce production cost.
In sum, power sensor frequency characteristic test compensation system of the present invention and method thereof have above-mentioned plurality of advantages and practical value, obvious improvement is arranged technically, and produced handy and practical effect, and the outstanding multinomial effect that has enhancement than prior art, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the circuit diagram of existing directional coupler and power detection module.
Fig. 2 is a detecting circuit frequency characteristic test installation drawing of the present invention
Fig. 3 is a power sensor frequency characteristic test compensation system test system block diagram of the present invention.
Fig. 4 is a power sensor frequency characteristic test compensation method process flow diagram of the present invention.
Fig. 5 is the test curve figure of reference diode, measured diode compensation front and back to Figure 10.
Embodiment
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
See also Fig. 2, shown in Figure 3, a kind of power sensor frequency characteristic test compensation system provided by the present invention, comprise frequency-characteristic measuring-testing instrument 10 and power sensor test compensation capsule 20 as test, the panel 21 of wherein said test compensation capsule 20 is provided with the resistance and the electric capacity jack 22 of debugging corrective network 30, specifically be more than two groups to the jack of debugging corrective network element, every pair of jack all can insert resistance R 2, R3, capacitor C 3.Also be provided with measured diode jack X5 and X6 on the panel of test compensation capsule; Described capsule is provided with radio frequency connector XS1 near the side of corrective network jack, be used to connect the high-frequency signal output interface of described frequency-characteristic measuring-testing instrument, be provided with direct current rectified signal out connector XS2 (BNC socket or 2mm contact pin near measured diode jack side, two kinds of output interface forms can be chosen wantonly), be used to connect the input interface of described frequency-characteristic measuring-testing instrument; In the described capsule, be provided with input impedance matching circuit and filtering circuit, the output impedance of described input impedance matching circuit and frequency-characteristic measuring-testing instrument is complementary.The input end of described corrective network connects described radio frequency connector XS1, and the other end connects described diode jack X5, and described diode jack X6 meets direct current out connector XS2 by described filtering circuit.
When detecting the detection frequency characteristic of diode, tested detector diode is inserted diode jack X5, X6, jack with short-circuit line short circuit corrective network element, make the high-frequency signal output interface of the positive pole of tested detector diode by described input matching circuit connection frequency-characteristic measuring-testing instrument, the negative pole of tested detector diode connects the input interface of frequency-characteristic measuring-testing instrument, it is qualified to judge whether that tested detector diode is carried out preliminary survey, then according to tested detector diode preliminary survey result, select the resistance R 2 of the corrective network of certain parameter, R3 and capacitor C 3, insert respectively in the described resistance and electric capacity jack on the little box panel of test compensation, compensate, adjust component parameters, the frequency characteristic that makes power sensor is near level.After finishing, debugging will comprise that a whole set of power sensor of diode and corrective network thereof is installed in the directional coupler, reinstalls transmitter and verifies.The feasible debugging that can only carry out on high-power transmitter is transferred on the small-signal instrument and is carried out, and has saved a large amount of human and material resources and electric energy, has reduced production cost.Concrete test and compensation will be described in detail in the aftermentioned method.
Described frequency-characteristic measuring-testing instrument is sweep generator or scalar network analyzer, and the frequency range of a. instrument must cover the operating frequency range of detecting circuit; B. instrument must be provided with detection input interface outside at least one road; C. the vertical resolution of instrument demonstration is better than every lattice 1dB.
For improving debugging speed, reduce the plug-in mounting time, avoid standard compensation network and reference diode to lose, also be provided with hilted broadsword two position conversion switch S1, double-pole two position conversion switch S2 on the panel of described test compensation capsule, also be provided with reference diode in the described capsule.The lock seat S1-1 of the output order cutter two position conversion switch S1 of described debugging corrective network, the tool rest S1-3 of described hilted broadsword two position conversion switch S1 connects described diode jack X5, and the lock seat S1-2 of described hilted broadsword two position conversion switch S1 connects described input impedance matching circuit; Described reference diode is in parallel with described diode jack X5, X6 by described double-pole two position conversion switch S2.Can detect debugging work by the switch switching.
The radio frequency connector of described test compensation capsule is the radio frequency socket of N type or BNC type or other type; Described direct current out connector is BNC socket or independent binding post or other terminal formation.
Described reference diode is the detector diode that has in the high-power transmitter operating frequency range near the horizontal frequency characteristic.
Power sensor frequency characteristic test compensation system of the present invention, when being used as the detection frequency characteristic that detects measured diode, do not insert earlier this diode,, sweep generator and whole test system are calibrated resistance R 2, R3 and the variable capacitance C3 access of reference diode V1 and corrective network.And then measured diode is replaced reference diode insert among diode jack X5, the X6, with the frequency characteristic of sweep generator detection measured diode, can also this screening as high frequency detection diode.
See also Fig. 4 the present invention a kind of method of using said apparatus to carry out the compensation of power sensor frequency characteristic test also be provided, may further comprise the steps:
The 1-1 test prepares to connect sweep generator and test compensation capsule, do not take over what diode between X5, X6 jack on the test compensation capsule, double-pole two position conversion switch S2 are with the reference diode place in circuit, hilted broadsword two position conversion switch S1 select test to connect input matching network, directly the detection frequency characteristic of test benchmark diode;
The 1-2 instrument is provided with swept-frequency signal output attenuatoin 0dB, and swept frequency range is set at working frequency range, and vertical resolution is selected the 1dB/ degree;
1-3 adjusts the perpendicular displacement knob of sweep generator input signal, and the input signal curve is moved on to correct position, and the low side of curve is alignd with certain bar horizontal scale line; The detection frequency characteristic of the reference diode of measuring as shown in Figure 5;
If the high low side response error of 1-4 analysis and judgement curve illustrates that then instrument and whole test system are working properly within 0.5dB, can carry out next step; If there is not curve to occur, perhaps the curve error of Xian Shiing is very bad, and then expression system breaks down, and needs to check whether tie cable is reliable, and whether instrument breaks down, and carries out next step after fixing a breakdown;
1-5 checks the corrective network path, and whether normal hilted broadsword two position conversion switch S1 are with the corrective network place in circuit, and capacitor and divider resistance are inserted in the corrective network, and regulating capacitor can be transferred to level (as shown in Figure 6) with response detection frequency family curve; If it is inoperative or transfer less than smooth to regulate variable condenser, then belong to fault, should check whether the contact of each element of corrective network is good, fault is got rid of;
2-1 disconnects reference diode and corrective network, inserts measured diode measured diode is inserted diode jack X5 and the X6 that tests compensation system, with switch S 2 reference diode is disconnected; Switch S 1 is selected test, and obstructed over-compensation network directly connects input impedance matching circuit;
2-2 measures the measured diode detection frequency family curve of not compensated, and concrete method of adjustment is with step 1-3;
2-3 judges that according to the curve tilt condition that sweep generator shows whether the measured diode frequency characteristic is qualified, qualified, then enters step 3; Defective, get back to the measured diode that 2-1 more renews; Judge whether that qualified standard is then rule of thumb definite with the batch and the accuracy of detection requirement of task.Fig. 7, Fig. 9 show the characteristic example of the detection frequency of qualified and defective diode respectively.
Frequency response curve shape that step 3, the parameter of determining each element of corrective network show according to sweep generator and high, the minimum difference in the frequency range are chosen suitable capacitance resistance parameter, make curve after the compensation near level.
For qualified detector diode.In corrective network, insert the capacitor C3 of different capabilities in the jack in parallel, just can change the slope of response curve with R2.(value of resistance R 2 and R3 is that rule of thumb data in advance determines that suitable great majority are identified as qualified detector diode); Specifically be,, select a suitable capacitor, make the slope of a curve minimum, the detection characteristic curve behind the qualified as shown in Figure 8 diode compensation according to the curve shape of sweep generator demonstration and high, the minimum difference in the frequency range.At this moment the parameter of each element of corrective network is definite substantially.
Also can reach near level for defective diode by compensation.If measured diode detection frequency characteristic is very poor or be identified as defectively, then no matter change the building-out capacitor of which kind of numerical value, the error of response curve is still very big, does not perhaps change.At this moment will change the value of adjusting building-out capacitor behind the ratio of divider resistance again.This work need be carried out repeatedly repeatedly, even also needs to insert compensating inductance.Generally speaking, always can find out the network parameter that is suitable for this diode.This step under extreme conditions can be used as the solution that power sensor frequency characteristic compensation network parameter is adjusted, but is producing in batches or multiple devices are being had under the situation of higher coherence request, and debugging difficulty is very high, and production efficiency is very low.Figure 10 is the detection characteristic curve behind the defective diode compensation.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (6)
1. power sensor frequency characteristic test compensation system, it is characterized in that comprising frequency-characteristic measuring-testing instrument and power sensor test compensation capsule, the panel of described test compensation capsule is provided with resistance, and the electric capacity jack of debugging corrective network, diode jack X5, X6; Also be provided with input impedance matching circuit, filter network in the described capsule; Described capsule is provided with the radio frequency connector of the high-frequency signal output terminal that connects described frequency-characteristic measuring-testing instrument near the jack side of debugging corrective network; Be provided with the direct current out connector of the input end that connects described frequency-characteristic measuring-testing instrument near diode jack side; The input end of described debugging corrective network connects described radio frequency connector by described input impedance matching circuit, and its output terminal connects described diode jack X5, and described diode jack X6 connects and connects described direct current out connector by described filter network.
2. power sensor frequency characteristic test compensation system according to claim 1 it is characterized in that described frequency-characteristic measuring-testing instrument is sweep generator or scalar network analyzer, and the frequency range of a. instrument must cover the operating frequency range of detecting circuit; B. instrument must be provided with detection input interface outside at least one road; C. the vertical resolution of instrument demonstration is better than every lattice 1dB.
3. power sensor frequency characteristic test compensation system according to claim 1 is characterized in that also being provided with hilted broadsword two position conversion switch S1, double-pole two position conversion switch S2 on the panel of described test compensation capsule, also is provided with reference diode in the described capsule; The lock seat S1-1 of the output order cutter two position conversion switch S1 of described debugging corrective network, the tool rest S1-3 of described hilted broadsword two position conversion switch S1 connects described diode jack X5, and the lock seat S1-2 of described hilted broadsword two position conversion switch S1 connects described input impedance matching circuit; Described reference diode is in parallel with described diode jack X5, X6 by described double-pole two position conversion switch S2.
4. power sensor frequency characteristic test compensation system according to claim 1 is characterized in that the radio frequency connector of described test compensation capsule is the radio frequency socket of N type or BNC type or other type; Described direct current out connector is BNC socket or independent binding post or other terminal formation.
5. power sensor frequency characteristic test compensation system according to claim 1 is characterized in that described reference diode is the detector diode that has near the horizontal frequency characteristic in the high-power transmitter operating frequency range.
6. one kind is used said apparatus to carry out the method that the power sensor frequency characteristic test compensates, and may further comprise the steps:
Step 1, calibration test system are tested with reference diode, with corrective network whole test system are carried out detection calibration again, comprising:
The 1-1 test prepares to connect sweep generator and test compensation capsule, do not take over what diode between X5, X6 jack on the test compensation capsule, double-pole two position conversion switch S2 are with the reference diode place in circuit, hilted broadsword two position conversion switch S1 select test to connect input matching network, the detection frequency characteristic of test diode;
The 1-2 instrument is provided with swept-frequency signal output attenuatoin 0dB, and swept frequency range is set at working frequency range, and vertical resolution is selected the 1dB/ degree;
1-3 adjusts the perpendicular displacement knob of sweep generator input signal, and the input signal curve is moved on to correct position, and the low side of curve is alignd with certain bar horizontal scale line;
If the high low side response error of 1-4 analysis and judgement curve illustrates that then instrument and whole test system are working properly within 0.5dB, can carry out next step; If there is not curve to occur, perhaps the curve error of Xian Shiing is very bad, and then expression system breaks down, and needs to check whether tie cable is reliable, and whether instrument breaks down, and carries out next step after fixing a breakdown;
1-5 checks the corrective network path, and whether normal hilted broadsword two position conversion switch S1 are with the corrective network place in circuit, and capacitor and divider resistance are inserted in the corrective network, and regulating capacitor should be able to be transferred to level with response detection frequency family curve; If it is inoperative or transfer less than smooth to regulate variable condenser, then belong to fault, should check whether the contact of each element of corrective network is good, and whether parameter is accurate, and fault is got rid of;
Step 2, detection measured diode detection frequency characteristic
2-1 disconnects reference diode and corrective network, inserts measured diode measured diode is inserted diode jack X5 and the X6 that tests compensation system, with switch S 2 reference diode is disconnected; Switch S 1 is selected test, and obstructed over-compensation network directly connects input impedance matching circuit;
2-2 measures the measured diode detection frequency family curve of not compensated, and concrete method of adjustment is with step 1-3;
2-3 judges that according to the curve tilt condition that sweep generator shows whether the measured diode frequency characteristic is qualified, qualified, then enters step 3; Defective, get back to the measured diode that 2-1 more renews;
Frequency response curve shape that step 3, the parameter of determining each element of corrective network show according to sweep generator and high, the minimum difference in the frequency range are chosen suitable capacitance resistance parameter, make curve after the compensation near level.
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| CN109298237A (en) * | 2018-11-15 | 2019-02-01 | 中电科仪器仪表有限公司 | A kind of more power points frequency response compensation methods of peak power probe |
| CN114636856A (en) * | 2022-05-17 | 2022-06-17 | 南京熊猫达盛电子科技有限公司 | Improve measurement accuracy's shortwave power meter |
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| US20090084178A1 (en) * | 2007-09-30 | 2009-04-02 | The Regents Of The University Of California | Non-invasive fluid density and viscosity measurement |
| CN201430218Y (en) * | 2009-06-22 | 2010-03-24 | 北京北广科技股份有限公司 | Safety grounding device for high-power transmitters |
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| CN2246809Y (en) * | 1996-05-16 | 1997-02-05 | 哈尔滨工程大学 | Super low-frequency response tester |
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