CN101141205B - TD-SCDMA radio frequency index testing system and method - Google Patents
TD-SCDMA radio frequency index testing system and method Download PDFInfo
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- CN101141205B CN101141205B CN2007100758298A CN200710075829A CN101141205B CN 101141205 B CN101141205 B CN 101141205B CN 2007100758298 A CN2007100758298 A CN 2007100758298A CN 200710075829 A CN200710075829 A CN 200710075829A CN 101141205 B CN101141205 B CN 101141205B
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Abstract
The present invention discloses a TD-SCDMA RF index testing system and a method. Wherein, the system comprises a signal generator as a signal source to generate intermediate frequency signals and radio frequency signals for TD-SCDMA test, a tested transreceiver connected with the signal generator through a RF cable, a signal receiver as a power meter to measure the intermediate frequency signals and the RF signals output by the tested transreceiver and connect with the tested transreceiver through a RF cable, a PC and test software operating in the PC. Wherein, the PC is respectively connected with the signal generator and the signal receiver through communication cables. The system and the method of the present invention make it unnecessary for testers to operate any instrument. Thus, it is only necessary to correctly connect the tested transreceiver with the system to automatically complete all specified test items, reject manual intervention in the whole test process and reduce probability of error operations.
Description
Technical field
The present invention relates to a kind of test macro and method of TD-SCDMA radio-frequency (RF) index, definite says, what relate to is a kind of system and method that can be used for testing key indexs such as TD-SCDMA transceiver channel gain and passband fluctuation.
Background technology
In the prior art, when test in enormous quantities, particularly in the production test, need indexs such as test TD-SCDMA (Time Division Synchronous Code Division Multiple Access) transceiver channel gain and passband fluctuation, for the passage of posting a letter, radio frequency band scope---the frequency range A:1880MHz～1920MHz that TD-SCDMA requires, frequency range B:2010MHz～2025MHz, frequency range C:2300MHz～2400MHz, bandwidth chahnel 15MHz (when frequency range B), when four carrier waves, require the maximum power output-5 ± 1dBm (20dBm input) that posts a letter, passband fluctuation≤1.5dB@15MHz/≤1dB@10MHz.For collection of letters passage, require the intermediate frequency center frequency 139.5MHz of transceiver, bandwidth chahnel 15MHz (when frequency range B), collection of letters passage nominal gain 20～23dB, passband fluctuation≤1.5dB@15MHz/≤1dB@10MHz.
The measurement of above-mentioned these indexs is to adopt signal generator in present technology, and the instrument that frequency spectrograph and power meter or the like are expensive causes the raising of cost.Particularly, the testing apparatus of current TD-SCDMA transceiver mainly contains following shortcoming:
Testing apparatus needs signal generator, frequency spectrograph or power meter, and whole testing device involves great expense, and has improved the cost of production link greatly.After the instrumentation, the operation instrument for can be correct also needs the tester is carried out special training, wastes time and energy, and has increased the risk of manual intervention in the test process simultaneously.For production test, the testing apparatus of instrumentation, test speed are obviously slow partially, influence production capacity.Instrument generally all only provides the signal output of single channel, for the transceiver that a plurality of passages are arranged, no matter be other switching circuit board of exploitation or the switching by hand successively of each passage, all can increase cost, and introduce risk.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The cost that causes in view of instrumentation and the problem of production capacity, the system and method that the purpose of this invention is to provide a kind of TD-SCDMA of being exclusively used in transceiver tester, this system and method can the lieu of radio-frequency instrument, specially key indexs such as TD-SCDMA transceiver channel gain and passband fluctuation are tested, under few reduction measuring accuracy prerequisite, can reduce the cost of whole system greatly.
Technical scheme of the present invention comprises:
A kind of TD-SCDMA radio frequency index testing system connects tested transceiver by radio frequency cable, and it comprises:
One signal generation apparatus is used for connecting described tested transceiver as producing the signal source that TD-SCDMA tests required intermediate frequency and radiofrequency signal by radio frequency cable;
One signal receiving device is used for connecting described tested transceiver as the intermediate frequency of the described tested transceiver output of test and the power meter of radiofrequency signal by radio frequency cable;
One PC and run on test cell on this PC, described PC is connected with signal receiving device with signal generation apparatus respectively by communication cable.
Described system, wherein, this test cell comprises human-computer interface module, test event module and communication interface modules;
Described human-computer interface module is used to offer visualization interface of software user, and reads the command information that the user selects and handle accordingly by man-machine interface, and after disposing the result of gained is presented on the man-machine interface;
Described test event module is used for selecting corresponding test module to test by the software user by man-machine interface, a passage of the corresponding tested transceiver of each test event module;
Described test module is used for after receiving test command, send configuration order to signal generation apparatus and signal receiving device by the described communications cable, the performance number data that the received signal receiving system reports are returned the sign that whether pass through of test and are arrived man-machine interface after handling accordingly;
Described communication interface modules is used to realize and the communicating by letter of signal generation apparatus and signal receiving device.
Described system, wherein, described signal generation apparatus comprises the IR-PLL circuit, local oscillator phase-locked loop circuit, 4 road intermediate frequency output circuits and 4 road rf output circuits.
Described system, wherein, described IR-PLL circuit comprises phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, numerical-control attenuator, PI type attenuator circuit, power splitter and correspondent peripheral circuit, described phase-locked loop chip, loop filter, VCXO produce the intermediate-freuqncy signal of required frequency, after filtering and amplifying, enter numerical-control attenuator; Described intermediate-freuqncy signal is divided into two by power splitter, and wherein one tunnel intermediate-freuqncy signal outputs to 4 road intermediate frequency output circuits, and another road intermediate-freuqncy signal outputs to 4 road rf output circuits.
Described system, wherein, the power output of described intermediate-freuqncy signal can be adjusted.
Described system, wherein, described local oscillator phase-locked loop circuit comprises high frequency phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, PI type attenuator circuit and correspondent peripheral circuit, described high frequency phase-locked loop chip, loop filter, VCXO produce the local oscillation signal of required frequency, after filtering and amplifying, output to 4 road rf output circuits.
Described system, wherein, described 4 road intermediate frequency output circuits comprise numerical-control attenuator, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, the intermediate-freuqncy signal that described IR-PLL circuit is sent here carries out through numerical-control attenuator exporting by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs after the performance number adjustment;
Described 4 road rf output circuits comprise numerical-control attenuator, frequency mixer, amplifier, filter, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, the intermediate-freuqncy signal that described IR-PLL circuit is sent here is carried out after the performance number adjustment through numerical-control attenuator, enter frequency mixer, with produce into radiofrequency signal after the local oscillation signal mixing that described local oscillator phase-locked loop circuit is sent here, this radiofrequency signal is exported by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs through after the amplification filtering.
Described system, wherein, described signal receiving device comprises: 4 road intermediate frequency input circuits, 4 road radio frequency input circuits, power-sensing circuit, mould/number conversion circuit and CPU mini system.
Described system, wherein, described 4 road intermediate frequency input circuits comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, are used for 1 tunnel intermediate-freuqncy signal that 4 tunnel intermediate frequency is imported is delivered to power-sensing circuit later on through filtering;
Described 4 road radio frequency input circuits comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, and power-sensing circuit is delivered in 1 road radio frequency signal process filtering frequently that is used for 4 tunnel radio frequency is imported later on.
Described system, wherein, described power-sensing circuit comprises radio frequency hilted broadsword 2 throw switches, numerical-control attenuator, logarithmic detector and correspondent peripheral circuit, 1 tunnel radiofrequency signal that 1 tunnel intermediate-freuqncy signal that described 4 road intermediate frequency input circuits are sent here and 4 radio frequency input circuits are sent here, choose wherein one the tunnel through radio frequency hilted broadsword 2 throw switches, after numerical-control attenuator adjustment power, deliver to logarithmic detector and carry out power detection, logarithmic detector becomes voltage data according to the performance number size conversion, delivers to mould/number conversion circuit; Mould/number conversion circuit comprises ADC chip and correspondent peripheral circuit, and this circuit converts the magnitude of voltage of power-sensing circuit output to digital signal, delivers to the CPU mini system and carries out data processing; Described CPU mini system comprises CPU, FLASH chip, fpga chip, RAM chip and correspondent peripheral circuit have communication interface with PC, obtain magnitude of voltage from mould/number conversion circuit, the treated performance number that draws utilizes communication interface with magnitude of voltage and the described PC of performance number reporting.
A kind of TD-SCDMA radio-frequency (RF) index method of testing, it may further comprise the steps:
A, after tested transceiver is ready, by the man-machine interface of test program, the tester selects corresponding test channel;
B, test program initial configuration signal generation apparatus enter the test event test; Testing software makes it generation and requires performance number radiofrequency signal and output by the control signal generating means, and the radiofrequency signal output of signal generation apparatus respective channel outlet is sent to tested transceiver respective channel input; In tested transceiver channel interior, described radiofrequency signal by respective handling after and output, deliver to the signal receiving device detection power, the performance number reporting of measuring is given testing software;
C, when all test events all test finish after, the performance number that testing software obtains is the performance number of the logarithmic detector input of signal receiving device, testing software draws tested transceiver channel gain value to the line loss of tested transceiver, tested transceiver to the line loss of signal receiving device, the Insertion Loss of signal receiving device according to signal power value, the signal generation apparatus that signal generation apparatus produces, whether the respective channel of judging this transceiver is normal, and feeds back to the man-machine interface demonstration of testing software.
A kind of TD-SCDMA radio frequency index testing system provided by the present invention and method, because test macro of the present invention and method can not need instrument, and energy is compatible frequency range A simultaneously, the test of frequency range B and three frequency ranges of frequency range C, the effect and the effect that are played in this link of production test with the instrumentation test are consistent; A kind of integration testing environment of sealing is provided simultaneously, the tester does not need to control any instrument, do not need native system is done any setting, only need with tested TD-SCDMA transceiver correct be connected to system of the present invention, can finish the test event of all regulations automatically, whole test process need not manual intervention, has reduced the possibility of misoperation.
Description of drawings
Fig. 1 is the structural representation of TD-SCDMA radio frequency index testing system of the present invention;
Fig. 2 is the signal generation apparatus hardware configuration schematic diagram of TD-SCDMA radio frequency index testing system of the present invention;
Fig. 3 is the signal receiving device hardware configuration schematic diagram of TD-SCDMA radio frequency index testing system of the present invention;
Fig. 4 is the software architecture block diagram of TD-SCDMA radio-frequency (RF) index method of testing of the present invention;
Fig. 5 is the schematic flow sheet of the enforcement test of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, will be described in more detail each preferred embodiment of the present invention.
The test system structure of TD-SCDMA radio-frequency (RF) index of the present invention as shown in Figure 1, it comprises signal generation apparatus 2, signal receiving device 3, a special-purpose PC 4 and run on testing software on this PC 4, PC 4 is connected with signal receiving device 3 with signal generation apparatus 2 respectively by communication cable, signal generation apparatus 2 is delivered to tested TD-SCDMA transceiver 1 by the radio frequency cable with signal, and tested TD-SCDMA transceiver 1 is delivered to signal receiving device 3 by the radio frequency cable with signal.
Signal generation apparatus 2 of the present invention, as shown in Figure 2, it is one and is exclusively used in the signal source that generation TD-SCDMA tests required intermediate frequency and radiofrequency signal easily, substitutes the general signal generator of prior art.This signal generation apparatus 2 comprises IR-PLL circuit 21, local oscillator phase-locked loop circuit 22,4 road intermediate frequency output circuits 23 and 4 road rf output circuits 24.
Described IR-PLL circuit 21 comprises phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, numerical-control attenuator, PI type attenuator circuit, power splitter and correspondent peripheral circuit, this is known by prior art, therefore repeats no more.Phase-locked loop chip, loop filter, VCXO produce the intermediate-freuqncy signal of required frequency, after filtering and amplifying, enter numerical-control attenuator, and the power output of intermediate-freuqncy signal can be adjusted as required flexibly.Intermediate-freuqncy signal is divided into two by power splitter, and wherein one tunnel intermediate-freuqncy signal outputs to 4 road intermediate frequency output circuits 23, and another road intermediate-freuqncy signal outputs to 4 road rf output circuits 24.
Local oscillator phase-locked loop circuit 22 comprises high frequency phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, PI type attenuator circuit and correspondent peripheral circuit, and this is known by prior art, therefore repeats no more.High frequency phase-locked loop chip, loop filter, VCXO produce the local oscillation signal of required frequency, after filtering and amplifying, output to 4 road rf output circuits 24.
Described 4 road intermediate frequency output circuits 23 comprise numerical-control attenuator, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, and this is known by prior art, therefore repeat no more.The intermediate-freuqncy signal that the IR-PLL circuit is sent here carries out through numerical-control attenuator exporting by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs after the performance number adjustment.
4 road rf output circuits 24 of the present invention comprise numerical-control attenuator, frequency mixer, amplifier, filter, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, and this is known by prior art, therefore repeat no more.The intermediate-freuqncy signal that the IR-PLL circuit is sent here is carried out after the performance number adjustment through numerical-control attenuator, enter frequency mixer, with produce into radiofrequency signal after the local oscillation signal mixing that described local oscillator phase-locked loop circuit is sent here, this radiofrequency signal is exported by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs through after the amplification filtering.
Signal receiving device 3 of the present invention, as shown in Figure 3, it is one and is exclusively used in the intermediate frequency of test TD-SCDMA transceiver output to be measured and the power meter of radiofrequency signal easily, substitutes general frequency spectrograph or the power meter of prior art.This device comprises 4 road intermediate frequency input circuits, 31,4 road radio frequency input circuits 32, power-sensing circuit 33, mould/number conversion circuit 34 and CPU mini system 35.
Described 4 road intermediate frequency input circuits 31 comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, and this is known by prior art, therefore repeat no more.The function of this part circuit is that 1 tunnel intermediate-freuqncy signal in 4 tunnel the intermediate frequency input is delivered to power-sensing circuit later on through filtering.
Described 4 road radio frequency input circuits 32 comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, and this is known by prior art, therefore repeat no more.The function of this part circuit is that power-sensing circuit is delivered in the signal process filtering frequently of 1 road radio frequency in 4 tunnel the radio frequency input later on.
Described power-sensing circuit 33 comprises radio frequency hilted broadsword 2 throw switches, numerical-control attenuator, logarithmic detector and correspondent peripheral circuit, and this is known by prior art, therefore repeats no more.1 tunnel radiofrequency signal that 1 tunnel intermediate-freuqncy signal that described 4 road intermediate frequency input circuits are sent here and 4 radio frequency input circuits are sent here, choose wherein one the tunnel through radio frequency hilted broadsword 2 throw switches, after numerical-control attenuator adjustment power, deliver to logarithmic detector and carry out power detection, logarithmic detector becomes voltage data according to the performance number size conversion, delivers to mould/number conversion circuit; Mould/number conversion circuit comprises ADC chip and correspondent peripheral circuit, and this circuit converts the magnitude of voltage of power-sensing circuit output to digital signal, delivers to the CPU mini system and carries out data processing.The CPU mini system comprises CPU, FLASH chip, fpga chip, RAM chip and correspondent peripheral circuit, and it and PC have communication interface.The CPU mini system obtains magnitude of voltage from mould/number conversion circuit, and the treated performance number that draws utilizes communication interface with magnitude of voltage and performance number reporting PC.
The present invention runs on the testing software on the special-purpose PC 4, and as shown in Figure 4, this software has human-computer interface module, test event module and communication interface modules.Human-computer interface module offers visualization interface of software user, and testing software reads the command information that the user selects by man-machine interface and handles accordingly, after disposing, the result of gained is presented on the man-machine interface.The test event module has a plurality of test events, and the software user can select corresponding test module to test by man-machine interface, a passage of the corresponding tested transceiver of each module.After test module is received the test name, send configuration order to signal generation apparatus and signal receiving device by the communications cable shown in Figure 1, the performance number data that the received signal receiving system reports are returned the sign that whether pass through of test and are arrived man-machine interface after handling accordingly.Described communication interface modules realization is communicated by letter with signal generation apparatus and signal receiving device.
The test implementation flow chart of TD-SCDMA radio frequency index testing system of the present invention as shown in Figure 5, present embodiment is an example to test one road TD-SCDMA transceiver down-conversion channel gain, explains the implementation step of system scheme of the present invention:
The present invention disposes described signal generation apparatus: IF-FRE 140MHZ according to following condition, local oscillator is set in 1870～1885MHZ, frequency is with the stepping fine setting of 200KHZ, radio frequency band is exactly frequency range B:2010MHZ～2025MHZ, and present embodiment is only discussed with 2010MHZ, 2018MHZ and 2025MHZ.
In the ready back of tested transceiver (step 1), by the man-machine interface of test program, the tester selects corresponding test channel (step 2).Step 3: test program initial configuration signal generation apparatus after finishing, begins to enter test event test (step 4).Testing software is by the control signal generating means, make it to produce the 2018MHZ radiofrequency signal and the output that require performance number, the 2018MHZ radiofrequency signal output of signal generation apparatus respective channel outlet is sent to tested TD-SCDMA transceiver down-conversion passage input (step 5).In tested TD-SCDMA transceiver down-conversion channel interior, the 2018MHZ radiofrequency signal is down-converted to 140MHZ intermediate-freuqncy signal and output, delivers to the signal receiving device detection power, and the performance number reporting of measuring is given testing software (step 6).
When all test events all test finish after, the performance number that testing software obtains is the performance number of the logarithmic detector input of signal receiving device.Because the passage Insertion Loss of signal receiving device itself is known, so can draw the 140MHZ intermediate-freuqncy signal performance number of signal receiving device input.The 2018MHZ radiofrequency signal performance number that testing software produces according to signal generation apparatus again, signal generation apparatus is to the line loss of tested TD-SCDMA transceiver, the line loss of tested TD-SCDMA transceiver is to these several given values of line loss of signal receiving device, can draw the channel gain value of tested TD-SCDMA transceiver down-conversion passage, by judge this channel gain whether the channel gain scope of standard conform to, whether the down-conversion passage that can judge this transceiver is normal, result of determination finally can feed back to the man-machine interface of testing software, for tester and maintenance personal's reference (step 7).
More than illustrated how to test one road TD-SCDMA transceiver down-conversion channel gain, the step of testing one road TD-SCDMA transceiver up-conversion channel gain also is the same, therefore repeated no more.
The inventive method can also be carried out the passband fluctuation test: test program need be chosen more frequency and test, system of the present invention supports 2010MHZ～2025MHZ frequency range, a plurality of frequencies of 200KHZ stepping, the difference of the channel gain of each frequency has constituted passband fluctuation.Testing procedure is consistent with the channel gain testing procedure of front, before just each test gain, need dispose the local oscillator frequency that needs at 1870～1885MHZ.
When TD-SCDMA radio frequency index testing system of the present invention and method have effectively solved production test, the problem of using traditional Meter Test to bring, compare with the Meter Test of prior art, system and method for the present invention has been abandoned expensive RF instrumentation, greatly reduces cost; Simultaneously, native system support test has the TD-SCDMA transceiver of multichannel up-conversion and down-conversion passage, and comparing the conventional instrument test needs manual switching channel, and very big advantage is arranged on saving time; Since testing software can flexible configuration the passage of test appointment, with the form detailed report of form, for production test, effectively speed production efficient improves test speed to test result automatically, reduces the misoperation possibility of manual intervention.
Should be understood that above-mentioned description at preferred embodiment of the present invention is comparatively detailed and concrete, can not therefore be interpreted as the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (9)
1. a TD-SCDMA radio frequency index testing system connects tested transceiver by radio frequency cable, it is characterized in that it comprises:
One signal generation apparatus, comprise the IR-PLL circuit, local oscillator phase-locked loop circuit, 4 road intermediate frequency output circuits and 4 road rf output circuits, be used for connecting described tested transceiver by radio frequency cable as producing the signal source that TD-SCDMA tests required intermediate frequency and radiofrequency signal;
One signal receiving device is used for connecting described tested transceiver as the intermediate frequency of the described tested transceiver output of test and the power meter of radiofrequency signal by radio frequency cable;
One PC and run on test cell on this PC, described PC is connected with signal receiving device with signal generation apparatus respectively by communication cable; Described test cell comprises human-computer interface module, test event module and communication interface modules;
Described human-computer interface module is used to offer visualization interface of software user, and reads the command information that the user selects and handle accordingly by man-machine interface, and after disposing the result of gained is presented on the man-machine interface;
Described test event module is used for selecting corresponding test module to test by the software user by man-machine interface, a passage of the corresponding tested transceiver of each test event module;
Described test module is used for after receiving test command, send configuration order to signal generation apparatus and signal receiving device by described communication cable, the performance number data that the received signal receiving system reports are returned the sign that whether pass through of test and are arrived man-machine interface after handling accordingly;
Described communication interface modules is used to realize and the communicating by letter of signal generation apparatus and signal receiving device.
2. system according to claim 1, it is characterized in that, described IR-PLL circuit comprises phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, numerical-control attenuator, PI type attenuator circuit, power splitter and correspondent peripheral circuit, described phase-locked loop chip, loop filter, VCXO produce the intermediate-freuqncy signal of required frequency, after filtering and amplifying, enter numerical-control attenuator; Described intermediate-freuqncy signal is divided into two by power splitter, and wherein one tunnel intermediate-freuqncy signal outputs to 4 road intermediate frequency output circuits, and another road intermediate-freuqncy signal outputs to 4 road rf output circuits.
3. system according to claim 2 is characterized in that the power output of described intermediate-freuqncy signal can be adjusted.
4. system according to claim 3, it is characterized in that, described local oscillator phase-locked loop circuit comprises high frequency phase-locked loop chip, loop filter, VCXO, filter circuit, amplifier, PI type attenuator circuit and correspondent peripheral circuit, described high frequency phase-locked loop chip, loop filter, VCXO produce the local oscillation signal of required frequency, after filtering and amplifying, output to 4 road rf output circuits.
5. system according to claim 3, it is characterized in that, described 4 road intermediate frequency output circuits comprise numerical-control attenuator, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, the intermediate-freuqncy signal that described IR-PLL circuit is sent here carries out through numerical-control attenuator exporting by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs after the performance number adjustment;
Described 4 road rf output circuits comprise numerical-control attenuator, frequency mixer, amplifier, filter, radio frequency hilted broadsword 4 throw switches and correspondent peripheral circuit, the intermediate-freuqncy signal that described IR-PLL circuit is sent here is carried out after the performance number adjustment through numerical-control attenuator, enter frequency mixer, with produce into radiofrequency signal after the local oscillation signal mixing that described local oscillator phase-locked loop circuit is sent here, this radiofrequency signal is exported by a certain road that radio frequency hilted broadsword 4 throw switches switch from 4 tunnel outputs through after the amplification filtering.
6. system according to claim 1 is characterized in that, described signal receiving device comprises: 4 road intermediate frequency input circuits, 4 road radio frequency input circuits, power-sensing circuit, mould/number conversion circuit and CPU mini system.
7. system according to claim 6, it is characterized in that, described 4 road intermediate frequency input circuits comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, are used for 1 tunnel intermediate-freuqncy signal that 4 tunnel intermediate frequency is imported is delivered to power-sensing circuit later on through filtering;
Described 4 road radio frequency input circuits comprise radio frequency hilted broadsword 4 throw switches, filter circuit and correspondent peripheral circuit, and power-sensing circuit is delivered in 1 road radio frequency signal process filtering frequently that is used for 4 tunnel radio frequency is imported later on.
8. system according to claim 7, it is characterized in that, described power-sensing circuit comprises radio frequency hilted broadsword 2 throw switches, numerical-control attenuator, logarithmic detector and correspondent peripheral circuit, 1 tunnel radiofrequency signal that 1 tunnel intermediate-freuqncy signal that described 4 road intermediate frequency input circuits are sent here and 4 radio frequency input circuits are sent here, choose wherein one the tunnel through radio frequency hilted broadsword 2 throw switches, after numerical-control attenuator adjustment power, deliver to logarithmic detector and carry out power detection, logarithmic detector becomes voltage data according to the performance number size conversion, delivers to mould/number conversion circuit; Mould/number conversion circuit comprises ADC chip and correspondent peripheral circuit, and this circuit converts the magnitude of voltage of power-sensing circuit output to digital signal, delivers to the CPU mini system and carries out data processing; Described CPU mini system comprises CPU, FLASH chip, fpga chip, RAM chip and correspondent peripheral circuit have communication interface with PC, obtain magnitude of voltage from mould/number conversion circuit, the treated performance number that draws utilizes communication interface with magnitude of voltage and the described PC of performance number reporting.
9. TD-SCDMA radio-frequency (RF) index method of testing, it may further comprise the steps:
A, after tested transceiver is ready, by the man-machine interface of test program, the tester selects corresponding test channel;
B, test program initial configuration signal generation apparatus enter the test event test; Described signal generation apparatus comprises the IR-PLL circuit, local oscillator phase-locked loop circuit, 4 road intermediate frequency output circuits and 4 road rf output circuits; Testing software makes it generation and requires performance number radiofrequency signal and output by the control signal generating means, and the radiofrequency signal output of signal generation apparatus respective channel outlet is sent to tested transceiver respective channel input; In tested transceiver channel interior, described radiofrequency signal by respective handling after and output, deliver to the signal receiving device detection power, the performance number reporting of measuring is given testing software;
C, when all test events all test finish after, the performance number that testing software obtains is the performance number of the logarithmic detector input of signal receiving device, testing software draws tested transceiver channel gain value to the line loss of tested transceiver, tested transceiver to the line loss of signal receiving device, the Insertion Loss of signal receiving device according to signal power value, the signal generation apparatus that signal generation apparatus produces, whether the respective channel of judging this transceiver is normal, and feeds back to the man-machine interface demonstration of testing software.
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1567801A (en) * | 2003-06-25 | 2005-01-19 | 华为技术有限公司 | Radio-frequency indicator testing method |
| CN1929667A (en) * | 2005-09-05 | 2007-03-14 | 中兴通讯股份有限公司 | Automatic testing device and method for GSM multiple carrier frequency base station |
| CN1866799A (en) * | 2006-06-15 | 2006-11-22 | 北京北方烽火科技有限公司 | TD-SCDMA signal generator and its regulating method |
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