CN202998092U - Measuring instrument - Google Patents
Measuring instrument Download PDFInfo
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- CN202998092U CN202998092U CN2012205600732U CN201220560073U CN202998092U CN 202998092 U CN202998092 U CN 202998092U CN 2012205600732 U CN2012205600732 U CN 2012205600732U CN 201220560073 U CN201220560073 U CN 201220560073U CN 202998092 U CN202998092 U CN 202998092U
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Abstract
The utility model discloses a measuring instrument which is characterized in that a single-tone signal generated by a local oscillator is amplified by an amplifier, then amplified again by a power amplifier and filtered by a first filter; and therefore a filtered local oscillation signal with amplified power is obtained; the single-tone signal is a periodic signal; after a digital intermediate frequency signal emitted from a signal source passes through a signal link and then is filtered by a second filter, a filtered radiofrequency signal with amplified power is obtained; the periodic signal and the filtered radiofrequency signal with amplified power are combined; after a combined signal is obtained, the combined signal is coupled; the obtained coupled signal is sent to an object device to be measured, and an intermodulation single reflected from the object device is received; by calculating correlation peaks of a local reference signal and the received intermodulation signal, fault information of the object device is obtained; because a periodic single-tone signal is adopted in one link of the above two links, delay problems do not need to be considered between the two links of singles; and therefore parameters of the object device to be measured are improved in accuracy.
Description
Technical field
The utility model relates to performance test field, particularly a kind of measuring instrument.
Background technology
Adopted the synthetic inter-modulated signal of hardware circuit to measure objective network device to be measured for fault-finding location, range measurement and cable system performance test at present.
prior art Mid Frequency 1 signal and frequency range 2 signals all enter through the radiofrequency signal that obtains power amplification after signal link separately and close path filter, wherein said signal link comprises: digital to analog converter, frequency mixer, local oscillator and power amplifier, through closing the filtered radiofrequency signal of path filter again after the coupler coupling, the signal of output enters in target devices to be measured, the signal that returns from described target devices to be measured by coupler and filter after, enter in the acknowledge(ment) signal link, at last, by digital signal processing module to local reference signal and the signal that returns after transforming process, obtain the fault message of described target devices to be measured.
In above-mentioned existing measuring instrument, when entering target devices to be measured after a series of processing of signal process of the signal of frequency range 1 and frequency range 2, can produce an inter-modulated signal, due to the signal of the signal of frequency range 1 and frequency range 2 during through separately signal link, can be due to difference or the circuit board wiring placement differences of the components and parts in link, cause the signal delay of described frequency range 1 and frequency range 2, thereby make the correlation of two paths of signals descend, affected the precision of the target devices parameter information to be measured that obtains.
The utility model content
Problem to be solved in the utility model is: a kind of measuring instrument is provided, when solving in prior art due to two paths of signals through separately signal link due to the difference of components and parts in described signal link, cause the correlation of two paths of signals to descend, thereby affected the problem of the precision of the objective network device parameters information to be measured that obtains.
The utility model provides a kind of measuring instrument, and described measuring instrument comprises:
Produce the local oscillator of tone signal;
Be connected with described local oscillator, the amplifier that the tone signal that described local oscillator is produced carries out power amplification;
Be connected with described amplifier, to described the first filter that carries out filtering through the tone signal of amplifier amplification;
Described measuring instrument also comprises: the signal source of emission digital medium-frequency signal;
Be connected with described signal source, described digital medium-frequency signal transformed the first signal link that obtains the radio frequency analog signal after the power amplification corresponding with described digital medium-frequency signal;
Be connected with described first signal link, with described the second filter that carries out filtering through the radio frequency analog signal after power amplification;
Be connected with described the second filter with described the first filter, described filtered local oscillated signal and described filtered radiofrequency signal are closed the road, obtain closing the road signal, the described road signal that closes is sent to target devices to be measured, and receive the mixer of the inter-modulated signal of described target devices generation to be measured;
Described measuring instrument also comprises: the local reference signal source of emission local reference signal;
Be connected with described mixer, described inter-modulated signal carried out the 3rd filter of filtering;
Be connected with described the 3rd filter, described filtered inter-modulated signal carried out the 3rd signal link of power amplification;
Be connected with described local reference signal source with described the 3rd signal link, the inter-modulated signal after described local reference signal and described power amplification is processed, obtain the signal processor of the information of described target devices to be measured.
Preferably, described signal link comprises:
Described digital medium-frequency signal is carried out the digital-to-analogue converter that digital-to-analogue conversion obtains the analog intermediate frequency signal corresponding with described digital medium-frequency signal;
Be connected with described digital-to-analogue converter, the oscillator signal that described analog intermediate frequency signal and local oscillator are sent is modulated into the frequency mixer of radio frequency analog signal;
Be connected with described frequency mixer, described radio frequency analog signal carried out the amplifier of power amplification.
as can be seen from the above technical solutions, the utility model provides a kind of measuring instrument, the tone signal that is produced by local oscillator amplifies through power amplifier after amplifier amplifies again, after the first filter filtering, obtain the local oscillated signal of filtered power amplification, the digital medium-frequency signal that signal source is sent is through signal link, after the second filter filtering, obtain the radiofrequency signal of filtered power amplification, the local oscillated signal of described filtered power amplification and the radiofrequency signal of described filtered power amplification are closed the road, and the signal that will close behind the road sends to described target devices to be measured, this two paths of signals wherein, there is one road signal that the cyclical signal that obtains is provided by local oscillator, and another road signal is the digital medium-frequency signal that is sent by signal source, need not the considering delay problem between this two paths of signals, send to like this coupled signal of described target devices to be measured just not have the problem of the fault location low precision that causes due to signal delay, improved accordingly the precision of the target devices parameter to be measured that obtains.
Description of drawings
Fig. 1 is the structural representation of embodiment one disclosed a kind of measuring instrument;
Fig. 2 is the structural representation of signal link.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills belong to protection range of the present utility model not making the every other embodiment that obtains under the creative work prerequisite.
In the utility model embodiment one disclosed measuring instrument structure as shown in Figure 1, described measuring instrument comprises:
Local oscillator 101 produces tone signal, what be connected with described local oscillator 101 is amplifier 102, described amplifier 102 carries out power amplification with described tone signal, what be connected with described amplifier 102 is the first filter 103, and the tone signal after 103 pairs of power amplifications of described the first filter carries out filtering;
signal source 104 emission digital medium-frequency signals, described digital medium-frequency signal is through first signal link 105, described first signal link 105 transforms described digital medium-frequency signal the radio frequency analog signal that obtains after the power amplification corresponding with described digital medium-frequency signal, radio frequency analog signal after described power amplification is through the second filter 106, what be connected with described the second filter 106 with described the first filter 103 is that device 107 is closed on the road, 107 pairs of described filtered tone signals of described mixer and described filtered radiofrequency signal are closed the road, obtain closing the road signal, and close the road signal to send to what be connected with described mixer 107 be that the target devices to be measured (not marking in figure) that produces inter-modulated signal is arranged described,
Local reference signal source 108 emission local reference signals, the 3rd filter 109 is connected with described mixer 107, described the 3rd filter 109 is used for described inter-modulated signal is carried out filtering, what be connected with described the 3rd filter 109 is the 3rd signal link 110, and described the 3rd signal link carries out power amplification with described filtered inter-modulated signal;
What be connected with described the 3rd signal link 110 with described local reference signal source 108 is signal processor 111, inter-modulated signal after 111 pairs of described reference signals of described signal processor and described power amplification is processed, and obtains the information of described target devices to be measured.
Wherein, described amplifier can be multistage amplification, and amplifier herein can arrange with user's needs.
Wherein, the first filter, the second filter and the 3rd filter can be the cavity body filters of three frequency ranges.
Wherein, first signal link, secondary signal link and the 3rd signal link have all comprised identical components and parts.
the disclosed a kind of measuring instrument of the present embodiment, the signal link of original frequency range 1 signal is simplified, directly by local oscillator oscillator input one road tone signal, because described tone signal is cyclical signal, can well carry out the relevant of two paths of signals, need not consider original frequency range 1 and frequency range 2 signal delay and the correlation of the two paths of signals that causes descends, use described measuring instrument can improve the precision that obtains objective network device parameters information to be measured, in addition, simplified the signal link of original frequency range 1 signal, reduced design constraint, the cost of circuit board and area all can reduce accordingly.
Preferably, referring to Fig. 2, described signal link comprises:
Digital-to-analogue converter 201, described digital medium-frequency signal is carried out digital-to-analogue conversion obtain the analog intermediate frequency signal corresponding with described digital medium-frequency signal, what be connected with described digital-to-analogue converter is frequency mixer 202, described frequency mixer 202, the oscillator signal that described analog intermediate frequency signal and local oscillator are sent is modulated into radio frequency analog signal, what be connected with described frequency mixer is amplifier 203, and described amplifier 203 carries out described radiofrequency signal in the amplifier of power amplification.
Wherein, herein amplifier can be also multistage amplification.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed device of embodiment, because it is corresponding with the disclosed method of embodiment, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment is apparent to those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the wide region consistent with principle disclosed herein and features of novelty.
Claims (2)
1. a measuring instrument, is characterized in that,
Produce the local oscillator of tone signal;
Be connected with described local oscillator, the amplifier that the tone signal that described local oscillator is produced carries out power amplification;
Be connected with described amplifier, to described the first filter that carries out filtering through the tone signal of amplifier amplification;
Described measuring instrument also comprises: the signal source of emission digital medium-frequency signal;
Be connected with described signal source, described digital medium-frequency signal transformed the first signal link that obtains the radio frequency analog signal after the power amplification corresponding with described digital medium-frequency signal;
Be connected with described first signal link, with described the second filter that carries out filtering through the radio frequency analog signal after power amplification;
Be connected with described the second filter with described the first filter, described filtered local oscillated signal and described filtered radiofrequency signal are closed the road, obtain closing the road signal, the described road signal that closes is sent to target devices to be measured, and receive the mixer of the inter-modulated signal of described target devices generation to be measured;
Described measuring instrument also comprises: the local reference signal source of emission local reference signal;
Be connected with described mixer, described inter-modulated signal carried out the 3rd filter of filtering;
Be connected with described the 3rd filter, described filtered inter-modulated signal carried out the 3rd signal link of power amplification;
Be connected with described local reference signal source with described the 3rd signal link, the inter-modulated signal after described local reference signal and described power amplification is processed, obtain the signal processor of the information of described target devices to be measured.
2. measuring instrument according to claim 1, is characterized in that, described signal link comprises:
Described digital medium-frequency signal is carried out the digital-to-analogue converter that digital-to-analogue conversion obtains the analog intermediate frequency signal corresponding with described digital medium-frequency signal;
Be connected with described digital-to-analogue converter, the oscillator signal that described analog intermediate frequency signal and local oscillator are sent is modulated into the frequency mixer of radio frequency analog signal;
Be connected with described frequency mixer, described radio frequency analog signal carried out the amplifier of power amplification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205600732U CN202998092U (en) | 2012-10-29 | 2012-10-29 | Measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205600732U CN202998092U (en) | 2012-10-29 | 2012-10-29 | Measuring instrument |
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| Publication Number | Publication Date |
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| CN202998092U true CN202998092U (en) | 2013-06-12 |
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| CN2012205600732U Expired - Fee Related CN202998092U (en) | 2012-10-29 | 2012-10-29 | Measuring instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427921A (en) * | 2013-08-13 | 2013-12-04 | 华为技术有限公司 | Method and device for fault detection of antenna feed system |
| CN103675448A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
| CN103944594A (en) * | 2014-05-05 | 2014-07-23 | 浙江大学 | Initial phase control based passive inter modulation occurrence point positioning method and system thereof |
| CN106716854A (en) * | 2014-09-19 | 2017-05-24 | 罗森伯格高频技术有限及两合公司 | Method for measuring passive intermodulation and measuring device |
| CN109066027A (en) * | 2018-08-30 | 2018-12-21 | 安徽禄讯电子科技有限公司 | A kind of combining filtering branch apparatus |
-
2012
- 2012-10-29 CN CN2012205600732U patent/CN202998092U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427921A (en) * | 2013-08-13 | 2013-12-04 | 华为技术有限公司 | Method and device for fault detection of antenna feed system |
| CN103675448A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
| CN103675448B (en) * | 2013-12-16 | 2017-04-19 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
| CN103944594A (en) * | 2014-05-05 | 2014-07-23 | 浙江大学 | Initial phase control based passive inter modulation occurrence point positioning method and system thereof |
| CN103944594B (en) * | 2014-05-05 | 2016-03-30 | 浙江大学 | Based on localization method and the system thereof of the passive intermodulation origination point of initial phase control |
| CN106716854A (en) * | 2014-09-19 | 2017-05-24 | 罗森伯格高频技术有限及两合公司 | Method for measuring passive intermodulation and measuring device |
| CN106716854B (en) * | 2014-09-19 | 2018-08-03 | 罗森伯格高频技术有限及两合公司 | The measurement method and measuring device of passive intermodulation |
| CN109066027A (en) * | 2018-08-30 | 2018-12-21 | 安徽禄讯电子科技有限公司 | A kind of combining filtering branch apparatus |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20161029 |