CN1051848C - Sateelite spectral monitor unit - Google Patents
Sateelite spectral monitor unit Download PDFInfo
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- CN1051848C CN1051848C CN95111605A CN95111605A CN1051848C CN 1051848 C CN1051848 C CN 1051848C CN 95111605 A CN95111605 A CN 95111605A CN 95111605 A CN95111605 A CN 95111605A CN 1051848 C CN1051848 C CN 1051848C
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Abstract
The present invention relates to a satellite spectral monitoring and controlling unit for monitoring a satellite signal spectrum by a satellite earth station. The present invention is provided with a program control rough regulation and fine regulation controller, an automatic monitoring functional key and a Chinese character library, wherein program control rough regulation and fine regulation controller automatically regulates input attenuation to an optimum state according to the magnitude of a signal and a state of the unit; the automatic monitoring functional key causes the monitoring unit to automatically print in certain time, monitor printing, prompt to warn by sound and generate and output a remote control signal; the Chinese character library causes a display and the printing to realize Chinese character writing. The monitoring unit has a high intellectualized extent, a strong monitoring and controlling function, simple and convenient operation and a Chinese character display by the characteristics. The present invention is particularly suitable for a general person and a person without more professional training.
Description
The present invention relates to a kind of spectrum analyzer, particularly a kind ofly be used for the satellite frequency spectrum instrument that satellite earth station monitors satellite signal spectrum.
Satellite earth station monitors it is the requisite important means that ensures satellite communication to the frequency spectrum of satellite-signal.From prior art and product, though the relevant product of U.S. Hewlett-Packard Corporation and Shanghai radio 26 factories can both be used for satellite signal spectrum is monitored, but, still not as being specifically designed to monitor that satellite signal spectrum is monitored, high-intelligentization, that function is strong.Product such as " the YM4031 spectrum analyzer " of " the HP8591 spectrum analyzer " of U.S. Hewlett-Packard Corporation, " HP8592 spectrum analyzer " and Shanghai radio 26 factories, " YM4032 spectral monitoring instrument ", though have the high-performance of spectrum analysis aspect, but complicated operation, and all have the following disadvantages from the angle of spectral monitoring:
(A) do not have input attenuation to regulate automatically, control, cause easily owing to maloperation damages monitor, perhaps input signal is excessive, causes the nonlinear distortion of circuit, influences the accuracy that monitor is measured;
(B) do not have automatic function for monitoring, under improper situation, can not print signal waveform and various parameter, note automatically, can not the sound equipment prompting report to the police, can not produce and export remote signal, to start or the work of control emergency equipment; And under normal circumstances, can not regularly signal waveform and various parameter be printed, note automatically again;
(C) showing, printing all is English and symbol, does not meet the national conditions of China.
Owing to there are these deficiencies, above product can not well be used for satellite signal spectrum is monitored, also is not suitable for the general staff and uses.
The objective of the invention is: provide a kind of be specifically designed to that satellite signal spectrum is monitored, high-intelligentization, have special supervision and control function, easy and simple to handle and satellite frequency spectrum that meet China's actual conditions monitors, controller.
Technical scheme of the present invention is:
At one by casing, panel, satellite-signal incoming feeder socket, input attenuator, the 1st frequency mixer, low-pass filter, the 2nd frequency mixer, the 2nd band-pass filter amplifier, the 3rd frequency mixer, the 3rd band-pass filter amplifier, in put, logarithmic amplifier, wave detector, the 1st scanning local oscillator, the 2nd local oscillator, the 3rd local oscillator, D/A converter, intermediate-frequency gain bandwidth control device, A/D converter, the minitype single-chip computing machine, the display part, the storage part, keyboard, the print control unit of computer program-control, printer, the satellite frequency spectrum that power supply is formed monitors, in the controller
(A) be provided with the storing apparatus that is used to store the self-regulating upper limit decision value of input attenuation, be provided with the storing apparatus that is used to store the self-regulating lower limit decision value of input attenuation, be provided with the input attenuation coarse adjustment controller of computer program-control, be provided with the input attenuation fine tuning controller of computer program-control, input attenuation coarse adjustment controller one end is connected with input attenuator, the other end is connected with computing machine, and input attenuation fine tuning controller one end is connected with logarithmic amplifier, and the other end is connected with computing machine.Under the control of computing machine, according to signal magnitude and instrument state, storing apparatus with the self-regulating upper limit decision value of storage input attenuation is adjudicated with the value in the storing apparatus that stores the self-regulating lower limit decision value of input attenuation, whether control input attenuation coarse adjustment controller and the work of input attenuation fine tuning controller, thereby make that input attenuation coarse adjustment controller and input attenuation fine tuning controller cooperatively interact, acting in conjunction is in attenuation network, makes the input attenuation of this monitor be adjusted at optimum condition automatically;
(B) be provided with the storing apparatus of the decision value that is used to store automatic supervision, be provided with this monitor of control and enter function key automatic follow-up work state, that be printed on " monitoring automatically " printed words, this function key is installed on the panel of this supervision, controller, is connected with computing machine.Press this function key computing machine with regard to storing certain value in the storing apparatus of giving the automatic decision value that monitors, make this monitor enter automatic follow-up work state, energy automatic time typing, monitoring printing, sound equipment prompting warning, generation and output remote signal;
(C) be provided with the storing apparatus that is used to store the timed print time value, be provided with and be used to store the storing apparatus of monitoring the decision value of printing, be provided with the print timer of computer program-control, be provided with the printing timer of computer program-control, print timer is connected with computing machine respectively with the printing timer.Under automatic follow-up work state, various situations according to satellite-signal, compare, adjudicate with the storing apparatus of storage timed print time value and the value of storing in the storing apparatus of monitoring the decision value of printing, under computer control, carry out timed print under the normal condition and the monitoring under the improper situation and print, thereby realized under normal circumstances with under the improper situation can both printing automatically, tracer signal waveform and various parameter;
(D) be provided with the storing apparatus of the decision value that is used to store improper situation 1, be provided with the storing apparatus of the decision value that is used to store improper situation 2, be provided with the storing apparatus of the decision value that is used to store improper situation 3, be provided with sound equipment prompting, the alarm of computer program-control, be provided with the remote signal generator of computer program-control, be provided with remote signal output terminal socket, sound equipment prompting, alarm are connected with computing machine, remote signal generator one end is connected with computing machine, and the other end is connected with remote signal output terminal socket again.Under improper situation, computing machine compares, adjudicates with the storing apparatus of the decision value of the storing apparatus of the decision value of the improper situation 1 of storage, the improper situation 2 of storage and the value of storing in the storing apparatus of decision value of improper situation 3, thereby the prompting of control sound equipment, alarm carry out three kinds of different sound equipment promptings or report to the police, simultaneous computer control remote signal generator produces a remote signal, exports from the remote signal output terminal;
(E) be provided with Chinese character base, Chinese character base is connected with computing machine, and computing machine is connected with display part, storage part again, makes demonstration, prints and realize Chinesizing.
Advantage of the present invention is:
(A) owing to adopted input attenuation to regulate automatically, control, the intelligent degree height of monitor can prevent, eliminate owing to maloperation damages monitor, and perhaps input signal is excessive, causes the nonlinear distortion of circuit, influences the accuracy that monitor is measured;
(B) owing to adopted sound equipment prompting controlling alarm, monitoring to print function for monitoring automatically such as control, timed print control, remote signal control, under normal circumstances, can regularly print signal waveform and various parameter, note; Under abnormal conditions, can not only the sound equipment prompting report to the police, and can print the signal waveform of this moment and various parameter, note, make monitor under unattended situation, still surveillance satellite signal well, can also export remote signal, start or the work of control emergency equipment, the function that can make monitor rises to a certain degree automatic control from general supervision;
(C) because parameters such as demonstration, print signal and channel are used Chinese character, more meet the national conditions of China.
Above characteristics make the intelligent degree height of satellite frequency spectrum monitor, monitor, control function is strong, operates very easyly, add the Chinese character demonstration, are particularly suitable for use general, that do not pass through more professional training personnel.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Fig. 1 is a composition synoptic diagram of the present invention;
Fig. 2 is a panel synoptic diagram of the present invention;
Fig. 3 is the front elevation after the present invention takes away panel;
Fig. 4 is the side view of Fig. 3;
Fig. 5 is the flow diagram of computer software programs of the present invention.
As shown in Figure 1, the 1st, satellite-signal incoming feeder socket, the 2nd, input attenuator, 3 is the 1st frequency mixer, the 4th, low-pass filter, 5 is the 2nd frequency mixer, 6 is the 2nd band-pass filter amplifiers, 7 is the 3rd frequency mixer, 8 is the 3rd band-pass filter amplifiers, the 9th, in put, the 10th, logarithmic amplifier, the 11st, wave detector, 12 is the 1st scanning local oscillators, 13 is the 2nd local oscillators, 14 is the 3rd local oscillators, the 15th, the input attenuation coarse adjustment controller of computer program-control, the 16th, D/A converter, the 17th, intermediate-frequency gain bandwidth control device, the 18th, the input attenuation fine tuning controller of computer program-control, the 19th, A/D converter, the 20th, the minitype single-chip computing machine, the 21st, Chinese character base, the 22nd, the display part, the 23rd, the storage part, the 24th, keyboard, the 25th, the printing timer of computer program-control, the 26th, the print control unit of computer program-control, the 27th, the print timer of computer program-control, the 28th, the sound equipment prompting of computer program-control, alarm, the 29th, the remote signal generator of computer program-control, the 30th, remote signal output terminal socket, the 31st, printer, the 32nd, power supply, in minitype single-chip computing machine (20), be provided with the storing apparatus R1 of the decision value that is used to store automatic supervision, be provided with the storing apparatus R2 that is used to store the self-regulating upper limit decision value of input attenuation, be provided with the storing apparatus R3 that is used to store the self-regulating lower limit decision value of input attenuation, be provided with the storing apparatus R4 that is used to store the automatic time typing time value, be provided with the storing apparatus R5 that is used to store the decision value that monitoring prints, be provided with the storing apparatus R6 of the decision value that is used to store improper situation 1, be provided with the storing apparatus R7 of the decision value that is used to store improper situation 2, be provided with the storing apparatus R8 of the decision value that is used to store improper situation 3, be provided with the storing apparatus R9 of the decision value that is used to store scanning mode.
Being constructed as follows of main devices among Fig. 1:
1, printing timer (25) and print timer (27) is to constitute with the timer in the minitype single-chip computing machine/timer, as 8031 etc., or with the integrated circuit formation that contains timer/timer, as 8155 etc.;
2, input attenuation coarse adjustment controller (15) and input attenuation fine tuning controller (18) are respectively group relaies, each relay is connected with minitype single-chip computing machine (20), P1 mouths as 8031 etc., contact point are connected with resistor network in the logarithmic amplifier (10) with input attenuator (2) respectively;
3, remote signal generator (29) is one and constituted by the dc signal trigger of external control, or one constituted by the oscillator of the ac signal of external control;
4, sound equipment prompting, alarm (28) are one and constituted by the sound signal oscillator of external control and loudspeaker, or a hummer constitutes.
Main annexation and control relation are as follows among Fig. 1:
1, input attenuation coarse adjustment controller (15) one ends are connected with input attenuator (2), and the other end is connected with computing machine (20); Input attenuation fine tuning controller (18) one ends are connected with logarithmic amplifier (10), and the other end is connected with computing machine (20); Input attenuator (2) is the coarse adjustment attenuator that a stepping is 10dBm, control by input attenuation coarse adjustment controller (15), resistor network in input attenuation fine tuning controller (1B) the control logarithmic amplifier (10) is realized the fine tuning damping capacity, and the fine tuning stepping is 1dBm.In input attenuation coarse adjustment controller (15) and the input attenuation fine tuning controller (18) under computing machine (20) control, according to signal magnitude and instrument state, compare, adjudicate with the value in the storing apparatus (R3) of storing apparatus (R2) that stores the self-regulating upper limit decision value of input attenuation and the self-regulating lower limit decision value of storage input attenuation, control the contact that input attenuation coarse adjustment controller (15) and input attenuation fine tuning controller (18) disconnect or connect each attenuation network, to be combined into various damping capacitys;
2, (1) to (14) constitutes the channel of a simulating signal;
3, D/A converter (16) is that the digital controlled signal of computing machine (20) is converted to sawtooth voltage, makes the 1st scanning local oscillator (12) carry out frequency sweeping in certain spectral range.A/D converter (19) is that the simulation conversion of signals of wave detector (11) output is become digital signal, for computing machine (20) it is taken a sample, handles;
4, Chinese character base (21) is connected with computing machine (20), and computing machine (20) is connected with display part (22), storage part (23) again;
5, print timer (27), printing timer (25) are connected with computing machine (20) respectively with print control unit (26), and print control unit (26) other end is connected with printer (31) again.Under automatic follow-up work state, various situations according to satellite-signal, compare, adjudicate with the storing apparatus (R4) of storage timed print time value and the value of storing in the storing apparatus (R5) of monitoring the decision value of printing, timed print and the monitoring under the improper situation carried out under computer control under the normal condition are printed;
6, sound equipment prompting, alarm (28) are connected with computing machine (20), and remote signal generator (29) one ends are connected with computing machine (20), and the other end is connected with remote signal output terminal socket (30) again.Under improper situation, computing machine (20) compares, adjudicates with the storing apparatus (R7) of the decision value of the storing apparatus (R6) of the decision value of the improper situation 1 of storage, the improper situation 2 of storage and the value of storing in the storing apparatus (R8) of decision value of improper situation 3, thereby the prompting of control sound equipment, alarm (28) carry out three kinds of different sound equipment promptings or report to the police, simultaneous computer (20) control remote signal generator (29) produces a remote signal, exports from remote signal output terminal (30).
As shown in Figure 2, the 39th, casing, the 40th, panel, the 41st, display screen, the 42nd, frequency fine tuning knob, the 43rd, frequency coarse adjustment knob, the 44th, power button switch, the 45th, (RESET) button resets, the 46th, increase and regulate button, the 47th, input attenuation manual shift function key, the 48th, intermediate-frequency gain manual shift function key, the 49th, the amplitude adjusted key, the 50th, calibration function key, the 51st, manual printing function key, the 52nd, store function key, the 53rd, the control monitor enters automatic monitored state, be printed on the function key of " monitoring automatically " printed words, the 54th, reduce and regulate button, the 55th, spectrum width manual shift function key, the 56th, intermediate-frequency bandwidth manual shift function key, the 57th, sweep velocity is adjusted key, the 58th, coarse adjustment/fine tuning options button, the 59th, sound equipment/close options button, the 60th, filtering/disconnection options button, the 61st, timed print time can be set, be printed on the function key of " printing regularly " printed words, the 1st, satellite-signal incoming feeder socket.
Main annexation is among Fig. 2: " printing regularly " function key (61) is connected with computing machine (20) respectively with " monitoring automatically " function key (53).
As shown in Figure 4, the 30th, remote signal output terminal socket, the 62nd, printer interface.
Computer program process description as shown in Figure 5 is as follows:
70: start shooting or reset (RESET).
71: initialization directive.
72: the keyboard scan instruction.
73: scan 1 Frequency point instruction.
74: to Frequency point sampling, the computations that is scanned.
75: carrying out decision instruction with R1, is then to enter automatic monitored state.
76: with R2 and R3 compare, decision instruction, be then to carry out input attenuation to regulate automatically.
77: the input attenuation regulating command.
78: with R9 compare, decision instruction, be that then full frequency band scanning is finished.
79: idsplay order.
80: with R4 compare, decision instruction, be then to carry out timed print operation.
81: print parameters and waveform instruction.
82: print timer reset instruction and the reset instruction of printing timer.
83: with R5 compare, decision instruction, be then to monitor printing.
84: the counting period time command.
85: print parameters, waveform and instruction interval time.
86: print timer reset instruction and the reset instruction of printing timer.
87: with R6 compare, decision instruction, be the sound equipment prompting of then carrying out improper situation 1.
88: sound equipment is pointed out instruction in 5 seconds.
89: with R7 compare, decision instruction, be the sound equipment indication of then carrying out improper situation 2.
90: sound equipment is pointed out instruction in 15 seconds.
91: with R8 compare, decision instruction, be then to carry out the warning of improper situation 3 and remote signal produces and output.
92: continuous sound equipment alarm command.
93: remote signal produces and output order.
Wherein the span of each storing apparatus is as follows:
R1---subjectivity is defined as a certain value;
R2---span is a signal waveform when showing, 50%～80% of the required signal value in the top that is used for the shows signal wave regions in the display screen is run in the upper end of waveform;
R3---span is a signal waveform when showing, 30%～40% of the required signal value in the top that is used for the shows signal wave regions in the display screen is run in the upper end of waveform;
R4---the time value of required timed print;
R5---span is 5dBm～30dBm;
R6---span is 3dBm～9dBm;
R7---span is 10dBm～30dBm;
R8---when value is blackout, the difference of noise figure and machine intimate average noise;
R9---subjectivity is defined as a certain value.
The method and the control relation that compare among Fig. 5, adjudicate are as follows:
75---directly judge with R1;
76---sampling value deducts the value of R2, if the result for just, then carries out the input attenuation incremental adjustments, on the contrary then uncomfortable; Sampling value deducts the value of R3, if the result for negative, then carry out the input attenuation decrement and regulates, on the contrary then uncomfortable;
78---directly judge with R9;
80---calculate if timer subtracts 1 to R3, carry out the timed print operation when then R3 equals zero, calculate, when then accumulated value equals the value of R3, then carry out the timed print operation if timer adds 1;
83---deduct this full frequency band with the signal value after the last full frequency band scanning and beat signal value after retouching, its difference is equal to or greater than the value of R5, illustrate that then this signal amplitude had reduced (5dBm～30dBm) than the last time, monitor printing, signal parameter and the waveform print record of this moment are got off;
87---deduct this full frequency band with the signal value after the last full frequency band scanning and beat signal value after retouching, its difference is equal to or greater than the value of R6, illustrates that then this signal amplitude had reduced (3dBm～9dBm), carry out the sound equipment prompting of 5 seconds kinds than the last time;
89---deduct this full frequency band with the signal value after the last full frequency band scanning and beat signal value after retouching, its difference is equal to or greater than the value of R7, illustrates that then this signal amplitude had reduced (9dBm～30dBm), carry out the sound equipment prompting of 15 seconds kinds than the last time;
91---deduct this full frequency band with the signal value after the last full frequency band scanning and beat signal value after retouching, its difference is equal to or greater than the value of R8, then blackout has been described, carries out the warning of continuous sound equipment, and the generation remote signal, deactivation or control certain emergency equipment.
The signal of above indication is meant that supervision, the satellite-signal that controller received are the satellite-signals of relative positioning, its range value should equal to scan the damping capacity that sampling value adds that input attenuation is regulated, if the satellite-signal of several relative positionings is arranged in the full frequency band, then tackle each satellite-signal and monitor, only the main signal in one group of satellite-signal is monitored just passable generally speaking.
The course of work of the present invention is: when satellite-signal during in the input of the signal input part of this monitor, satellite-signal is through overdamping, after passing through a series of processing such as frequency conversion, filtering, amplification, detection of analog channel again, export a signal, this signal is after the A/D conversion, sample, calculate by computing machine, compare, differentiate by computing machine then.When output signal hour, computing machine reduces the input attenuation amount by control coarse adjustment and fine tuning controller.The input attenuation amount of satellite-signal reduces, and the result increases the output signal of analog channel.This process is carried out repeatedly, and when the analog channel output signal reached a suitable value, the self-regulating process of input attenuation just finished.Otherwise, then carry out and above-mentioned opposite adjustment process.Whenever monitor start reset (RESET) or signal feed separating signal input port after connect again or after signal changes, to carry out all that this decay is regulated automatically, the process of control.After pressing automatic supervision button, monitor enters automatic follow-up work state, after the output signal of analog channel is sampled, is calculated by computing machine, show, store, compare, differentiate with the value in each storing apparatus simultaneously, under normal circumstances, timed print signal waveform and various parameter at that time.When for a certain reason or satellite equipment etc. break down, when making satellite-signal be reduced to certain outlier or blackout suddenly, this moment signal waveform and various parameter are printed in monitoring, calculate and print interval time with last subnormal printing by printing timer simultaneously; Sound equipment prompting, alarm are under three kinds of different improper situations, can send three kinds of different sound equipment prompting or warnings, the electric signal that remote signal produces, control program makes the remote signal generator then produce an interchange or direct current is in the worst case exported from output terminal, and this signal can be used as the control signal that starts in other emergency equipments.When showing and print, be provided with Chinese character base in this monitor, parameters such as signal and channel are all shown, are printed by Chinese character, rather than english abbreviation or symbol.
Claims (5)
1, one by casing (39), panel (40), satellite-signal incoming feeder socket (1), input attenuator (2), the 1st frequency mixer (3), low-pass filter (4), the 2nd frequency mixer (5), the 2nd band-pass filter amplifier (6), the 3rd frequency mixer (7), the 3rd band-pass filter amplifier (8), in put (9), logarithmic amplifier (10), wave detector (11), the 1st scanning local oscillator (12), the 2nd local oscillator (13), the 3rd local oscillator (14), D/A converter (16), intermediate-frequency gain bandwidth control device (17), A/D converter (19), minitype single-chip computing machine (20), display part (22), storage part (23), keyboard (24), the print control unit of computer program-control (26), printer (31), the satellite frequency spectrum that power supply (32) is formed monitors, controller is characterized in that:
(A) be provided with the storing apparatus (R2) that is used to store the self-regulating upper limit decision value of input attenuation, be provided with the storing apparatus (R3) that is used to store the self-regulating lower limit decision value of input attenuation, be provided with the input attenuation coarse adjustment controller (15) of computer program-control, be provided with the input attenuation fine tuning controller (18) of computer program-control, input attenuation coarse adjustment controller (15) one ends are connected with input attenuator (2), the other end is connected with computing machine (20), input attenuation fine tuning controller (18) one ends are connected with logarithmic amplifier (10), and the other end is connected with computing machine (20).
(B) be provided with the storing apparatus (R1) of the decision value that is used to store automatic supervision, be provided with this monitor of control and enter function key (53) automatic follow-up work state, that be printed on " monitoring automatically " printed words, function key (53) is installed on the panel (40) of this supervision, controller, and function key (53) is connected with computing machine (20).
(C) be provided with the storing apparatus (R4) that is used to store the timed print time value, be provided with and be used to store the storing apparatus (R5) of monitoring the decision value of printing, be provided with the print timer (27) of computer program-control, be provided with the printing timer (25) of computer program-control, print timer (27), printing timer (25) are connected with computing machine (20) respectively.
(D) be provided with the storing apparatus (R6) of the decision value that is used to store improper situation 1, be provided with the storing apparatus (R7) of the decision value that is used to store improper situation 2, be provided with the storing apparatus (R8) of the decision value that is used to store improper situation 3, be provided with the sound equipment prompting of computer program-control, alarm (28), be provided with the remote signal generator (29) of computer program-control, be provided with remote signal output terminal socket (30), the sound equipment prompting, alarm (28) is connected with computing machine (20), remote signal generator (29) one ends are connected with computing machine (20), and the other end is connected with remote signal output terminal socket (30) again.
(E) be provided with Chinese character base (21), Chinese character base (21) is connected with computing machine (20), and computing machine (20) is connected with display part (22), storage part (23) again.
2, satellite frequency spectrum supervision according to claim 1, controller, it is characterized in that being provided with function key (61) the timed print time, that be printed on " printing regularly " printed words can be set, function key (61) is installed on the panel (40) of this monitor, is connected with computing machine (20).
3, satellite frequency spectrum according to claim 1 monitors, controller, when storing apparatus (R2) span that it is characterized in that being used to store the self-regulating upper limit decision value of input attenuation is the signal waveform demonstration, 50%～80% of the required signal value in the top that is used for the shows signal wave regions in the display screen is run in the upper end of waveform, storing apparatus (R3) span that is used to store the self-regulating lower limit decision value of input attenuation is a signal waveform when showing, 30%～40% of the required signal value in the top that is used for the shows signal wave regions in the display screen is run in the upper end of waveform.
4, satellite frequency spectrum supervision according to claim 1, controller, it is characterized in that being used to store storing apparatus (R5) span of monitoring the decision value of printing is 5dBm～30dBm.
5, satellite frequency spectrum supervision according to claim 1, controller, storing apparatus (R6) span that it is characterized in that being used to storing the decision value of improper situation 1 is 3dBm～9dBm, storing apparatus (R7) span that is used to store the decision value of improper situation 2 is 10dBm～30dBm, the storing apparatus (R8) of decision value that is used to store improper situation 3 is when value is blackout, the difference of noise figure and machine intimate average noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95111605A CN1051848C (en) | 1994-07-26 | 1995-04-21 | Sateelite spectral monitor unit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94239109 | 1994-07-26 | ||
| CN94239109.8 | 1994-07-26 | ||
| CN95111605A CN1051848C (en) | 1994-07-26 | 1995-04-21 | Sateelite spectral monitor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1125365A CN1125365A (en) | 1996-06-26 |
| CN1051848C true CN1051848C (en) | 2000-04-26 |
Family
ID=25743665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95111605A Expired - Fee Related CN1051848C (en) | 1994-07-26 | 1995-04-21 | Sateelite spectral monitor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051848C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364348A (en) * | 2011-11-18 | 2012-02-29 | 西安欣业科技发展有限公司 | Frequency spectrum automatic monitoring analyzer for satellite ground station intermediate-frequency signal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118666A (en) * | 1977-03-04 | 1978-10-03 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Automatic communication signal monitoring system |
| GB2234077A (en) * | 1989-04-11 | 1991-01-23 | Plessey Co Plc | Spectrum analysis in a communications system |
-
1995
- 1995-04-21 CN CN95111605A patent/CN1051848C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118666A (en) * | 1977-03-04 | 1978-10-03 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Automatic communication signal monitoring system |
| GB2234077A (en) * | 1989-04-11 | 1991-01-23 | Plessey Co Plc | Spectrum analysis in a communications system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1125365A (en) | 1996-06-26 |
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