Device for measuring spurious emissions transmitting devices


H04B17G01R29 -

 

(57) Abstract:

Usage: measuring technique. The purpose of the invention: enhanced functionality by monitoring the levels of spurious emissions. This is due to the fact that the radio is rebuilt using the built-in servo in the frequency range of measurements and using the appropriate units define and Registrar registered the maximum level detected undesired radiation and the frequency of this radiation. At the same time the measured value is compared (depending on the frequency range control) with the established norm on the levels of spurious emissions. If the level detected undesired radiation does not meet the established norm, the Registrar registers and also the magnitude of the discrepancy in the level of this side of the radiation to the established norm. 2 Il.

The invention relates to measuring technique and can be used for automatic measurement and registration of the levels and frequencies of adverse radiation transmitting devices with simultaneous automatic detection and registration of the magnitude of deviations from the established norms of the levels of those other side radiation transmitting devices, a digital frequency counter, connected in series driver digital code, the digital computer to the second input of which is connected the output of a digital frequency meter, and the Registrar, the driver reference signal, connected in series receiving antenna, controlled attenuator, a radio, a heterodyne output of which is connected to the input of the digital frequency meter, the unit of comparison, a second input connected to the output of the shaper reference signal, and the output is also connected to the control input of the controlled attenuator, a storage unit and a digital voltmeter, connected in series, extremestor, whose input is connected to the output of the Comparer, and the first electronic key, the output of which is connected with the control input of the digital frequency meter, connected in series, the first element OR the input of which is connected to the output of the limit switch of the radio, and the first RS-flip-flop, the output of which is connected with the control input of the radio receiver, connected in series to the second RS-trigger and block rotation of the transmitting antenna, connected to the output of the investigated radio transmitter, connected in series to the start block and the second element OR the output of which podklyuchaysya the inputs of which are connected respectively to the outputs of the block comparison and storage unit, the threshold element and element And a second input connected to an inverted output of the second RS-flip-flop, and the output connected to the control input of the first electronic switch, connected in series to the first digital storage unit, whose input is connected to the output of the digital voltmeter, digital subtractive unit and a digital adder, the output of which is connected to a second input of the Registrar, the second digital storage unit, the input and the control input of which is connected respectively to the outputs of the digital voltmeter and switch block rotation of the transmitting antenna, and the output is connected to a second input digital subtractive unit, the third digital storage unit, the input and output of which are connected respectively to the output of the digital voltmeter and the second input of the digital adder, connected in series shaper pulses, whose input is connected to the output of the Comparer, the second electronic switch, the control input of which is connected to the inverse output of the second RS-flip-flop, the limiter at the top and the inverter, the output of which is connected to the control input of the third digital storage unit, connected in series, the third electronic switch, the input of which is connected to the second input of the first element OR the first delay element, the output of which is connected also to the S-input of the second RS-flip-flop, and the third RS-flip-flop S-input of which is connected to the output of the second electronic key, and a direct output connected to the control input of the third electronic switch, connected in series to the second delay element, the input of which is connected to the output end of the switch block rotation of the transmitting antenna, and the output is connected with the second input of the second item OR the third item, OR whose output is connected to the control input of the storage unit, and a third delay element, an input connected to the output of the inverter, and the output connected to the control input of the Registrar and the second input of the third element OR with the limit switch block rotation of the transmitting antenna is connected also with the R-input of the second RS-flip-flop.

A disadvantage of this device is low speed (big time) testing of wireless devices on electromagnetic compatibility, so as to determine whether the levels of spurious emissions transmitting devices, the requirements of normative-technical documents of the human operator should the measured value of the level detection frequency control.

The purpose of the invention is the extension of the functionality of the device for measuring spurious emissions transmitting devices by carrying out simultaneously with the measurement and control of the levels of spurious emissions.

This is achieved by the fact that in the known device for the measurement of spurious emissions transmitting devices added sequentially connected to the second driver digital code of n-bit managed switch, the second digital subtractive block to the second input of which is connected to the output of the digital adder, the first n-bit electronic key and the second n-bit electronic key, the output of which is connected to the third input of the Registrar, the third driver digital code, the output of which is connected to the second input n-bit managed switch, connected in series, the first oscillator reference frequency, the first block of the comparison frequency, to the second input of which is connected to the output of the local oscillator of the radio receiver, and the fourth RS-trigger, R-input connected to the output of the limit switch of the radio, and a direct output connected to the control input n-bit managed switch, the digital unit of the comparison, the first one, and what about the adder, and the output is connected to the control input of the first n-bit electronic key, serial connected the second oscillator reference frequency, the second block of the comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver, and fifth RS-flop inverted output of which is connected with the control input of the second n-bit electronic key, serially connected third generator reference frequency and the third block comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver, and the output connected to the R input of the fifth RS-trigger.

In Fig. 1 shows a structural electrical diagram of the device of Fig. 2 - plot of stresses, explaining his work.

Device for measuring spurious emissions transmitting devices includes the first 1,1,. . . . the third 1.3 shapers of digital codes, made for example in the form of switches software rotary type P-11, digital transmitter 2, is a digital adder or digital subtractive unit depending on the tuning frequency of the local oscillator of the radio receiver, the recorder 3, made in the form tsifropechatayuschee devices, digital frequency meter 4, Priya, performed, for example, in the form of series-connected subtractive amplifier and limiter below, the imaging unit 9 reference signal, the first 10.1, . . . third 10.3 digital storage blocks, the first 11.1 and 11.2 second digital subtractive blocks, block 12 of rotation of the transmitting antenna, the first 13.1, . . . third 13.3 elements OR first 14.1, . . . fifth 14.5 RS-triggers, a storage unit 15, made for example in the form of a peak detector with reset, digital voltmeter 16, a digital adder 17, the imaging unit 18 pulses, performed, for example, in the form of serially connected to the Schmitt trigger and a differentiating circuit, extremestor 19, inverting amplifier 20, the first 21.1,. . . . third 21.3 delay elements made in the form of delay lines, block 22 start made in the form of series-connected constant voltage source and a switch button, the first 23.1, . . . third 23.3 electronic keys, limiter, top 24, an inverter 25, the threshold element 26, the And gate 27, the n-bit managed switch 28, made in the form of a set of n managed switches, control inputs which are combined and managing input n-bit switch (where n is the bit width used digital voltm the influencers inputs are combined and are control inputs n-bit keys, the first 30.1, . . . third 30.3 blocks comparison of frequencies, the first 31.1, . . . third 31.3 generators reference frequencies, a digital block 32 comparison, also shown is investigated transmitting device 33-34 (connected in series investigated the transmitter 34 and the transmitting antenna 33), are connected to the first driver 1.1 digital code, digital transmitter 2 to the second input of which is connected the output of a digital frequency meter 4, and the Registrar 3, are connected to receiving antenna 5, a controlled attenuator 6, the receiver 7, the output of the local oscillator which is connected to the input of the digital frequency meter 4, block 8 comparison, a second input connected to the output of the shaper 9 reference signal, and the output is also connected to the control input of the controlled attenuator 6, a storage unit 15, a digital voltmeter 16, the output of which is connected with the inputs of 10.2 second and third 10.3 digital storage blocks, the first digital storage unit 10.1, the first digital subtractive unit 11.1 to the second input of which is connected the output of the second digital storage unit 10.2, and a digital adder 17, a second input connected to the output of the third digital storage unit 10.3, and the output is connected to in the Chen output limit switch radio 7, and the first RS-flip-flop 14.1, direct the output of which is connected with the control input of the radio receiver 7, are connected to the block 22 start and the second element OR 13.2, the output of which is connected to the S-input of the first RS-flip-flop 14.1, are connected to extremestor 19, the inlet of which is connected to the output of the unit 8 and the first electronic key 23.1, the output of which is connected with the control input of the frequency counter 4, are connected to the subtractive amplifier 20, the inverting and non-inverting inputs of which are connected respectively to the outputs of the block 8 comparison and storage unit 15, the threshold element 26 and the element And 27, a second input connected to an inverted output of the second RS-flip-flop 14.2, and the output connected to the control input of the first electronic key 23.1, are connected to the shaper 18 pulses, whose input is connected to the output unit 8 comparison, the second electronic key 23.2, a control input connected to an inverted output of the second RS-flip-flop 14.2, and the output is also connected to the S-input of the third RS flip-flop 14.3, and the limiter 24 above, are connected to the third electronic key 23.3, the input and the control input of which is connected respectively to the output of Extremadura 19 and direct viha 10.1 and the second input of the first element OR 13.1, the first item 21.1 delay, the output of which is connected also to the R-input of the third RS flip-flop 14.3, the second RS-trigger 14.2 and block 12 of rotation of the transmitting antenna, the output of the limit switch which is connected with the control input of the second digital storage unit 10.2 and R-input of the second RS-flip-flop 14.2, are connected to the second element 21.2 delay, the input of which is connected to the output terminal of the switch unit 12, the rotation of the transmitting antenna, and the output is connected with the second input of the second element OR 13.2, and the third element OR 13.3, the output of which is connected to the control input of the storage unit 15, are connected to the inverter 25, the inlet of which is connected to the output of limiter 24 from above, and the output also connected with the control input of the third digital storage unit 10.3, and the third element 21.3 delay, the output of which is connected to the second input of the third element OR 13.3, are connected to the second driver 1.2 digital code of n-bit managed switch 28 to the second input of which is connected to the output of the third driver 1.3 digital code, and the output is connected also to the first input of the keypad 32 of the comparison, the second digital subtractive unit 11.2, the second input is bring the electronic key 29.1, a control input connected to the output of the keypad 32 and the second n-bit electronic key 29.2, the output of which is connected to the third input of the Registrar 3, are connected to the first generator 31.1 reference frequency, the first block 30.1 comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver 7, and the fourth RS-trigger 14.4, R is the input connected to the output of the limit switch of the radio receiver 7, and a direct output connected to the control input n-bit managed switch 28, are connected to the second generator 31.2 reference frequency, the second block 30.2 comparison of frequencies, to the second input of which is connected to the output of the local oscillator of the radio receiver 7, and fifth RS-trigger 14.5, the inverted output of which is connected with the control input of the second n-bit electronic key 29.2, serially connected third generator 31.3 reference frequency and the third block 30.3 comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver 7, and the output connected to the R input of the fifth RS-flip-flop 14.5.

The proposed device operates as follows.

The output of the first driver 1.1 digital digital code set the indicator 1.2 digital code - a digital code corresponding norm in the frequency range fkmin. . . fI(where fkmin- minimum frequency control range; fI- the frequency at which changes the rate on the levels of spurious emissions), and the output of the third driver 1.3 digital code is a digital code corresponding norm in the frequency range control fI. . . fkmaxwhere fkmaxmaximum frequency control range. The output of the shaper 9 reference signal set voltage Voequal to the voltage at the output of the receiver 7 when applying the input high-frequency signal corresponding to the sensitivity of the radio. Radio 7 configure (using manual settings) on the lower frequency range, and the first 31.1, second 31.2 and third 31.3 generators reference frequencies, respectively for frequencies fI+ fFC(or fI- fFC), fIn= fn+ fFC(or fIn= fn- fFCand fIin= fin+ fFC(or fIin= fin- fFC), where fnand finrespectively the lower and upper frequency nonspecified bandwidth.

At the initial moment of time t = 0 per the s outputs of the first 14.1, . . . fourth 14.4 RS-trigger voltage U1,. . . . U3(Fig. 2A, b, C, t = 0) and U4correspond to a logical "0", and the inverted outputs of the second 14.2 and fifth 14,5 RS-triggers and threshold element 26 produces a voltage U5(Fig. 2G, t = 0) and U6and U7(Fig. 2D, t = 0) corresponding to logical "1". The voltage U4is supplied to the control input n-bit managed switch 28, causing the first input of this switch is connected to its output. Voltage U5and U7proceed to the appropriate inputs of the element And 27, the output of which produces a voltage U8also corresponding to logical "1" (Fig. 2E, t = 0), which is fed to the control input of the first electronic key 23.1 and opens it. The voltage U5also fed to the control input of the second electronic key 23.2, resulting in the initial time he also opened. The voltage U6is supplied to the control input of the second n-bit electronic key 29.2 and opens it. The first n-bit electronic key 29.1 and third electronic key 23.3 at the initial time t = 0 are closed.

Circuit breaker button in the block 22 STA is in position "1". To direct the output of the first RS-flip-flop 14.1 generated voltage U1corresponding to logical "1" (Fig. 2A, t = t1), which gently sweeps the frequency of the radio 7 (using built-in servo) in the frequency range of the measurement.

When released in the process of rebuilding the radio 7 frequency in the band of his transmittance of the first side radiation of the investigated radio transmitting devices 33-34 on the output of the radio 7 produces a voltage, which is supplied to the first input unit 8 comparison to the second input of which is applied a voltage Vowith shaper 9 reference signal. When in the process of rebuilding the radio 7 on the frequency of its output voltage y reaches the value of voltage Voon the output unit 8 comparison produces a control voltage U10> 0 (Fig. 2ZH, t = t2), which, falling on the control input of the controlled attenuator 6 reduces the signal level at its output and, accordingly, the signal level at the input of the receiver 7, and, consequently, the value of the control voltage U10. In this case, since the signal level at the output of the controlled attenuator associated with the magnitude of the control narragansettbay envelope spectrum of detected spurious emissions.

At the same time the control voltage U10arrives at the inputs of the storage unit 15, shaper 18 pulses and Extremadura 19, and also to the inverting input of subtractive amplifier 20. When the input of the shaper 18 voltage pulses U10at its output produces a positive voltage pulse U11(Fig. 2H, t = t2), which through the open second electronic key 23.2 arrives at SIinput of the third RS flip-flop 14.3 and translates it into position "1". To direct the output of the third RS flip-flop 14.3 generated voltage U3corresponding to logical "1" (Fig. 2B, t = t2), which opens the third electronic key 23.3. Positive impetus U11also fed to the input of the limiter 24 from the top, which prevents it from passing through the inverter 25. When rebuilding the radio 7 in the frequency band occupied by the detected side radiation, the voltage on the inverting U10and reinvestiruet U12the subtractive inputs of the amplifier 20 are the same (block 15 is always memorizes the maximum value of the input signal (Fig. 2i), so that the voltage U13the output of subtractive amplifier 20 is equal to zero, and therefore the threshold element 2U5and U7corresponding to logical "1" (Fig. 2G, d, t2t t3), and therefore, the first electronic key 23.1 remains open.

When the frequency tuning 7 with the first maximum of the spectrum of detected spurious emissions (Fig. 2ZH, t = t3the output of Extremadura 19 produces a pulse U14(Fig. 2K, t = t3) c duration required to maintain a record of the information in the first digital storage unit 10.1, through which open at this time, the first electronic key 23.1 supplied to the control input of the digital counter 4, and through the third electronic key 23.3 - on control input of the first digital storage unit 10.1 (previously recorded information is erased leading edge of the pulse), the input of the first element 21.1 delay and advanced through the first element OR 13.1 on the R-input of the first RS-flip-flop 14.1. The first RS-flip-flop 14.1 returns to the initial state "0" at its direct output voltage U1becomes relevant logical "0" (Fig. 2A, t = t3), and the frequency tuning 7 is stopped, i.e., the radio is tuned to the frequency of the first maximum of the spectrum of detected adverse izlucheniya maximum spectrum of detected spurious emissions, and digital voltmeter 16 (working in continuous measurement mode) - the value of the voltage U(1)12= U(1)MOX(Fig. 2i, W, t = t3), corresponding to the level of this maximum. Digital code values of the voltage U(1)12= U(1)MOXrecorded in the first digital storage unit 10.1.

After the time necessary for recording information in a digital storage unit 10.1, with the first element 21.1 delay of the delayed pulse U14arrives at the S and R inputs, respectively, 14.2 second and third 14.3 RS-triggers. The second RS-trigger 14.2 translated in position "1", and the third RS-trigger 14.3 returns to the initial state "0". Thus to direct the output of the second RS-flip-flop 14.2 generated voltage U2corresponding to logical "1" (Fig. 2B, t = t4), which is input to the block 12 of rotation of the transmitting antenna 33 and with it, brings it in the rotation mode, and the inverted output of the second RS-flip-flop 14.2 voltage U5becomes relevant logical "0" (Fig. 2G, t= t5), resulting in the first 23.1 and second 23.2 electronic switches are closed, which eliminates the impact on the operation of the device of the pulses produced by the shaper rotation. At the same time to direct the output of the third RS flip-flop 14.3 voltage U3becomes relevant logical "0" (Fig. 2B, t = t4), and therefore the third electronic key 23.3 closes, which prevents further exposure of the pulses produced by Extremadura 19, the first digital storage unit 10.1.

During the rotation of the transmitting antenna 33 control voltage U10is changed in accordance with the directivity of this antenna at the frequency of the detected undesired radiation (Fig. 2ZH, t4t t6). The voltage U(2)12= U(2)MOXmaximum (for primary frequency detected spurious emissions) lobe of the transmitting antenna 33 (Fig. 2i, W, t = t5) obtained during one revolution of this antenna is recorded in the storage unit 15 and is measured by digital voltmeter 16.

When performing the transmitting antenna 33 total turnover voltage U15(Fig. 2l, t = t6c output limit switch unit 12, the rotation of the transmitting antenna (the duration of which is sufficient for recording information on the second digital storage unit 10.2) is fed to the control input of the second digital storage unit 10.2, R-input of the second RS-Tr is the MW output of the last voltage U2becomes relevant logical "0" (Fig. 2B, t = t6and the rotation transmitting antenna 33 is stopped, and the inverted output of the newly generated voltage U5corresponding to logical "1" (Fig. 2G, t = t6), which is fed to the control input of the first electronic key 23,1 and second input element And 27, which ensures the opening of the first electronic key 23.1 when applying to the first output element And 27 voltage corresponding to logic "1". At the same time in the second digital storage unit 10.2 recorded measured by digital voltmeter 16 value of the voltage U(2)12= U(2)MOX.

After the time necessary for recording information in the second digital storage unit 10.2, in the first digital subtractive unit 11.1 is calculated (digital code) and fed to the digital adder 17 the difference between the voltages U10recorded respectively in the second and first digital storage blocks 10.2, 10.1 (Y = U(2)MOX- U(1)MOX). Because the change of the control voltage U10uniquely identifies the level change of the signal receiving antenna 5, the obtained value of Y corresponds to the difference between uzunovo side radiation) and in the direction in which the recorded value of the voltage U(1)MOXthe first maximum of the detected undesired radiation.

At the same time delayed second element 21.2 delay pulse U15flows through the third element OR 13.3 on the control input storage unit 15, erasing the stored information about the value of the voltage U(2)MOX(Fig. 2i, t = t7). In this case, since the transmitting antenna 33 is returned to its initial position after completion of a full turn), the control voltage U10the output of block 8 comparison has value U(1)MOXand accordingly the voltage at the output of the storage unit 15 by the end of the erase pulse increases to values U(1)12(Fig. 2i, t = t7). This delayed pulse U15through the second element OR 13.2 of the first RS-flip-flop 14.1 newly translated at "1" at its output produces a voltage U1corresponding to logical "1" (Fig. 2A, t = t7), which is further frequency radio settings 7.

If the next maximum of the spectrum of detected spurious emissions greater than the previous one (Fig. 2ZH, t= t9), since the and 15 (Fig. 2ZH, and t8t t9), causing the first electronic key 23.1 at this time is open, and so is the measurement of the frequency of the local oscillator of the radio receiver 7, corresponding to this maximum. If the next peak of the spectrum of detected spurious emissions less than the previous one (Fig. 2ZH, t= t10), then the input storage unit 15, the voltage U10will be less (starting from time t>t9) than at its output U12. As a result, the output of the subtractive amplifier 20 produces a voltage U13>0, which translates the threshold element 26 in position "1". On the inverse yield of the latter voltage U7becomes relevant logical "0" (Fig. 2D, t>t9), the output element And 27 voltage U8also becomes relevant logical "0" (Fig. 2E, t > t9). Therefore, the first electronic key 23.1 closes, and the starting pulse U14on the control input of the digital counter 4 is not received. Thus, after adjustment of radio 7 on the magnitude of the frequency band occupied by the detected radiation at the output of the storage unit 15 is the voltage U(3)12= U(3)MOX(Fig. 2i, t9t t12protects the value of the lo frequency of the receiver 7, corresponding to this maximum. Digital code values of this frequency output digital frequency counter 4 is applied to a second input of the digital computer 2, to the first input of which receives the digital code value of the intermediate frequency of the receiver 7. The output of a digital transmitter 2 is produced and stored digital code corresponding to the peak frequency of the spectrum of detected spurious emissions, which is fed to the first input of the Registrar 3.

When the output frequency radio settings 7 of the bandwidth occupied by the spectrum of the detected undesired radiation, the voltage U10the output of block 8 becomes zero (Fig. 2ZH, t = t11), and therefore at the output of the shaper 18 pulse produces a negative voltage pulse U11(Fig. 2H, t = t11). Pulse U11without changing the state of the third RS flip-flop 14.3 passes through the stopper 24 on the top of the inverter 25, the output of which is formed a positive pulse U16, the duration of which provides a record of information in the second digital storage unit 10.3. This pulse is fed to the control input of the third digital storage unit 10.3 and the entrance to the third element 21.3 delay. If this is Uchenie voltage U(3)12= U(3)MOXat the output of the storage unit 15 corresponding to the maximum detected undesired radiation. After the time necessary for recording information in the second digital storage unit 10.3 digital adder 17, is determined by the sum of the X values In arriving at the first input of the digital adder 17 with the first digital subtractive unit 11.1, and the values of U(3)12= U(3)MOXcoming to the second input of the digital adder 17 with the third digital storage unit 10.3 (X = Y + U(3)MOX). Because the value of U(3)MOXcorresponds to the maximum of the spectrum of the detected undesired radiation, and the Y value to increase the gain of the transmitting antenna 33 in the maximum pattern compared to the gain of this antenna in the direction in which we determined the value of U(3)MOXthen the value of X is the level of spurious radiation of the investigated radio transmitting devices 34-33 with regard to the pattern of the transmitting antenna 33.

Digital code output digital adder 17 is supplied to the second inputs of the recorder 3, the second digital subtractive unit 11.2 and digital block 32 the new unit 32 comparison produces a voltage U17corresponding to logical "1" which is fed to the control input of the first n-bit electronic key 29.1 and opens it. At the same time at the output of the second digital subtractive unit 11.2 produces a digital code corresponding to the magnitude of the discrepancy of the level of detected spurious emissions established norm in the frequency range fkmin. . . fIthat through the open at this time, the first 30.1 and second 30.2 n-bit electronic keys arrives at the third entrance of the Registrar 3.

After the time necessary for recording information in the second digital storage unit 10.3 and operations in a digital adder 17 and the second digital subtractive unit 11.2, the delayed pulse U16c the third element 21.3 delay is supplied to the control input of the Registrar 3 and advanced through the third element OR 13.3 - on control input storage unit 15. As a result, the Registrar 3 registers level values detected undesired radiation, the frequency and magnitude of deviation of the level of radiation from the given norm, and deleted information in the storage unit 15 (Fig. 2i, t = t12). At the same time the threshold element 26 is returned in the original is. d, t = t12), resulting in the output of the element And 27 produces a voltage U8corresponding to logical "1" (Fig. 2E, t = t12), and the first electronic key 23.1 closed.

If the level of detected spurious emissions meets the established norm, the Registrar 3 registered only level values detected undesired radiation and its frequency.

When the frequency tuning 7 with the frequency band occupied by the spectrum of the next side of the radiation, the measurement process is repeated.

When the frequency of the lo signal to the radio 7 with a frequency of fInmounted on the output of the second generator 31.2 reference frequency, the output of the second unit 30.2 comparison of frequencies produces a positive pulse U18served on the S-input of the fifth RS-flip-flop 14.5 and translates it into position "1". On the inverse of the output of this trigger voltage U6becomes relevant logical "0" and therefore the second n-bit electronic key 29.2 closed, which eliminates the possibility of recording inspection results in nonspecified the frequency band fn, . . . fin.

When the and output of the third generator 31.3 reference frequency, the output of the third block 30.3 comparison of frequencies produces a positive pulse U19served on the R-input of the fifth RS-flip-flop 14.5 and returns it to the initial state "0". On the inverse yield of the latter is produced by the voltage U6corresponding to logical "1", which again opens the second n-bit electronic key 29.2.

When the frequency of the lo signal to the radio 7 frequency (fIfFC) mounted on the output of the first generator 31.1 reference frequency, the output of the first block 30.1 comparison of frequencies produces a positive pulse U20served on the S-input of the fourth RS flip-flop and translates it into position "1". To direct the output of the latter is produced by the voltage U4corresponding to logical "1" which is fed to the control input n-bit managed switch 28 and using it connects to the first inputs of the second digital subtractive unit 11.2 and digital unit 32 compares the output of the third driver 1.3 digital code. Thus, in the frequency range fI. . . fkmaxcompare the measured value with the standard set for the given range of frequencies.

the signal at the end of the reconstruction (Fig. 2A, t= tnand measurement process.

The proposed device for measuring spurious emissions transmitting devices, in comparison with the prototype allows you to extend the functionality of the device. The extension functionality is achieved due to the fact that simultaneously with the measurement of the levels of spurious emissions is the automatic detection and registration of the magnitude of deviations from the established norms of the levels of those spurious emissions that do not meet the established norm. (56) USSR Author's certificate

N 1605897, CL N 04 17/00, 1987.

DEVICE FOR MEASURING spurious EMISSIONS TRANSMITTING DEVICES containing digital frequency meter, connected in series driver digital code, the digital computer to the second input of which is connected the output of a digital frequency meter, and the Registrar, the driver reference signal, connected in series receiving antenna, controlled attenuator, a radio, a heterodyne output of which is connected to the input of the digital frequency meter, the unit of comparison, a second input connected to the output of the shaper reference signal, and the output is also connected to the control input of the control atclose to the output of the Comparer, and the first electronic switch, the output of which is connected with the control input of the digital frequency meter, connected in series, the first element OR the input of which is connected to the output of the limit switch of the radio, and the first RS-flip-flop, the output of which is connected with the control input of the radio receiver, connected in series to the second RS-trigger and block rotation of the transmitting antenna, connected to the output of the investigated radio transmitter, connected in series to the start block and the second element OR the output of which is connected to the S-input of the first RS flip-flop connected in series subtractive amplifier, inverting and non-inverting inputs of which are connected respectively to the outputs of the block comparison and storage unit, a threshold element and element And a second input connected to an inverted output of the second RS-flip-flop, and the output connected to the control input of the first electronic switch, connected in series to the first digital storage unit, whose input is connected to the output of the digital voltmeter, digital subtractive unit and a digital adder, the output of which is connected to a second input of the Registrar, the second digital storage unit, the input and the control input of which is connected to the output connected to the second input digital subtractive unit, the third digital storage unit, the input and output of which are connected respectively to the output of the digital voltmeter and the second input of the digital adder, connected in series shaper pulses, whose input is connected to the output of the Comparer, the second electronic switch, the control input of which is connected to the inverse output of the second RS-flip-flop, the limiter at the top and the inverter, the output of which is connected to the control input of the third digital storage unit, connected in series, the third electronic switch, the input of which is connected to the output of Extremadura, and the output also connected with the control input of the OR element, the first delay element, the output of which is connected also to the S-input of the second RS-flip-flop, and the third RS-flip-flop S-input of which is connected to the output of the second electronic key, and a direct output connected to the control input of the third electronic switch, connected in series to the second delay element, the input of which is connected to the output end of the switch block rotation of the transmitting antenna, and the output is connected with the second input of the second item OR the third item, OR whose output is connected to the control input of the storage unit, and the third element is concerning the entrance to the third element, OR the yield limit switch block rotation of the transmitting antenna is connected also with the R-input of the second RS-flip-flop, wherein, to increase functionality by controlling the levels of spurious emissions, entered serially connected second driver digital code of n-bit managed switch, the second digital subtractive block to the second input of which is connected to the output of the digital adder, the first n-bit electronic key and the second n-bit electronic key, the output of which is connected to the third input of the Registrar, the third driver digital code, the output of which is connected to the second input n-bit managed switch, connected in series, the first oscillator reference frequency, the first block of the comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver, and the fourth RS-trigger, R-input connected to the output of the limit switch of the radio, and a direct output connected to the control input n-bit managed switch, the digital unit of the comparison, the first and second inputs connected to the outputs respectively of the n-bit managed switch and a digital adder, and the Torah generator reference frequency, the second block of the comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver, and fifth RS-flop inverted output of which is connected with the control input of the second n-bit electronic key, serially connected third generator reference frequency and the third block comparison frequency to the second input of which is connected to the output of the local oscillator of the radio receiver, and the output connected to the R input of the fifth RS-trigger.

 

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