CN102215353A - N+1 radio frequency (RF) high-power intelligent synthesis system - Google Patents
N+1 radio frequency (RF) high-power intelligent synthesis system Download PDFInfo
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Abstract
The invention relates to a high-power intelligent synthesis system which is an important component of a necessary system for an N+1 television transmitting system. The creative system is used to support transmitting systems of multiple digital television transmitters with the power of 500W or above and undertake radio frequency (RF) power synthesis, namely a passive synthesis system. Under the control of a computer, the system provided by the invention intelligently sends the N+1 channels of RF power signals output by the N+1 transmitters (usually N is a positive integer less than or equal to eight), wherein N channels of RF power signals are sent to a filter group and one channel of RF power signals is sent to a load. The out-of-band clutters in the N channels of RF power signals are filtered out by the filter group and then synthesized, output and sent to an antenna feed system for users to receive. The N+1 RF high-power intelligent synthesis system comprises management software (platform), an exchanger, a synthesizer group, a band-pass filter group, an intelligent coaxial switch group and a load of the system. The characteristics of the system provided by the invention lie in that high-power RF synthesis can make multiple transmitters to share the same antenna feed system, and the system operate with low consumption (high efficiency) in a full adjacent frequency and intelligent (controlled by a computer) mode, and can realize an N+1switching function.
Description
Technical field
N+1 radio frequency (RF) the high power intelligent synthesis system that the present invention relates to is the necessary important composition of N+1 television emission system.In order to the emission system of the digital TV transmitter that supports many 500W and above power, it is synthetic to bear RF power, is its passive synthesis system; By my company is created.The present invention is under the control of computer, and with N+1 road (N is≤8 positive integer usually) the RF power signal of N+1 platform transmitter output, bank of filters is delivered on its N road intelligently; 1 the road delivers to load.N road RF power signal is synthetic output behind the clutter outside bank of filters elimination band, delivers to antenna-feedback system, is transmitted in the air, receives for the user.
Though the present invention is in fact also suitable fully to N+1 radio frequency (RF) small-power intelligence synthesis system with " N+1 radio frequency (RF) high power intelligent synthesis system " name.And existing in practice a plurality of high-power, low power N+1 radio frequencies (RF) power intelligent synthesis system successful Application.
Technical field involved in the present invention belongs to communication and radio and television equipment manufacturing.
Background technology
General RF high power synthesis system, its design philosophy still rests under the pattern of simulated television, does not have appliance computer control and the intelligent operation of realization; And what adopt mostly is to synthesize the aerial adjacent synthetic technology frequently of emission or double antenna every frequently; Can't satisfy the needs of N+1 television emission system.And that feature of the present invention is not only high-power RF is synthetic, makes many shared cover antenna-feedback systems of transmitters, more is: low-loss (high efficiency), can complete adjacent work frequently, intelligent (computer control) can realize " N+1 " handoff functionality.Adjacent multiplex's synthesis system frequently of the present invention, its elliptic function high power filter has adopted the cross-couplings technology; Especially the employing of technique for temperature compensation, mainly research is the linear expansion of different metal material and the relation between the temperature-compensating; The present invention is the inventor through long-term research and development, has grasped rich practice experience and has originality.Make the multiplexer can be between-20 ℃～+ 60 ℃, very operate as normal in the wide temperature range have been expanded its application greatly.Realized that adjacent frequency multiplex (MUX) is synthetic, single-antenna transmission.Adjacent synthesizing frequently both can be reduced the antenna feeder cost, can save non-renewable frequency resource again.
Feature of the present invention:
1) high-power RF is synthetic, makes many shared cover antenna-feedback systems of transmitter;
2) low-loss (high efficiency);
3) can work by complete adjacent frequency;
4) intelligent (embedded software, computer control);
5) " N+1 " intelligent handoff functionality.
N+1 radio frequency (RF) high power intelligent synthesis system is made up of management software (platform), switch, synthesizer group, band pass filter group, intelligent coaxial switch group and the load of this system.Its theory diagram is seen " description of drawings " Fig. 1.
Summary of the invention
The objective of the invention is to, can realize adjacent multiplex's synthesis system frequently " N+1 " handoff functionality, all can operate as normal in the low-loss (high efficiency), wide temperature range for the N+1 television emission system provides intellectuality, realize construction cost and the saving non-renewable frequency resource of single-antenna transmission to reduce the radio and TV operator of many high power digital television transmitters.
In the Digital Television emission system, generally the transmitter with 500W and above power is called high-power transmitter, bears the synthetic passive synthesis system of many transmitter RF of corresponding power power and is called high-power synthesis system.
The N+1 television emission system provides intellectuality can realize adjacent multiplex's synthesis system frequently " N+1 " handoff functionality, all can operate as normal in the low-loss (high efficiency), wide temperature range, realizes the single-antenna transmission of many high power digital television transmitters.
N+1 radio frequency (RF) high power intelligent synthesis system is the radio frequency (RF) high-power synthetic (N is 〉=2 ,≤20 positive integer) that my company created, was used for " N+1 " Digital Television emission system.It is at computer---under the control of N+1 radio frequency (RF) high power intelligent synthesis system management software (platform), operating state according to " N+1 television emission system ", intelligently the N+1 road RF power signal end of N+1 platform transmitter output is selected N road useful signal to bank of filters, the 1 tunnel does not break down and temporary transient useless signal is connected to load as yet at master transmitter.
N platform master transmitter is arranged in work in the N+1 Digital Television emission system during normal condition, when in case certain emission main frame breaks down in the N+1 Digital Television emission system, N+1 Digital Television emission system management control center enters switching flow automatically, the main frame of closing fault emission automatically starts N+1 radio frequency (RF) high power intelligent synthesis system management software.The output of thereupon fault being launched main frame automatically switches in the load, on the filter input port that is outputted to this master transmitter correspondence with backup emission main frame, the Based Intelligent Control function of N+1 radio frequency (RF) high power intelligent synthesis system that Here it is---be the handoff functionality that N+1 road RF power signal end is selected N road useful signal.
The RF power signal of N road useful signal behind the clutter, is combined into output by synthesizer outside bank of filters elimination band, deliver to a cover antenna-feedback system, is transmitted in the air, receives for the user.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is the main surface chart of the system management software of the present invention (platform).
Fig. 3 is a Based Intelligent Control functional software flow chart of the present invention.
Fig. 4 is an intelligence restoration functional software flow chart of the present invention.
Fig. 5 is an intelligent coaxial switch embedded software flow chart of the present invention.
Fig. 6 is the waveform characteristic figure of filter of the present invention.
Fig. 7 and 8 is the key diagram of temperature-compensating of the present invention.
Fig. 9 is an asterism formula synthesizer operation principle block diagram of the present invention.
Figure 10 forms figure for level bridge-type synthesizer elementary cell behind the present invention.
Figure 11 is the typical case of one No. six synthesizer group of the present invention.
Figure 12 is the radio frequency output signal spectrum photo of typical " 7+1 " national standard digital television emission system of the present invention.
Embodiment
N+1 radio frequency (RF) high power intelligent synthesis system management software (platform) is the important composition of N+1 radio frequency (RF) high power intelligent synthesis system, adopt the connected mode of internet that the working condition of N+1 radio frequency (RF) high power intelligent synthesis system equipment is followed the tracks of, detected by switch, offer information and data that N+1 Digital Television emission system management control center need be gathered, and on the main surface chart of N+1 Digital Television emission system management control center, show in real time.Its main surface chart is seen " description of drawings " Fig. 2.
N platform master transmitter is arranged in work in the N+1 Digital Television emission system during normal condition, when in case certain emission main frame breaks down in the N+1 Digital Television emission system, N+1 Digital Television emission system management control center enters switching flow automatically, the main frame of closing fault emission automatically starts N+1 radio frequency (RF) high power intelligent synthesis system management software.Assign instruction for the coaxial switch controller, implement the Based Intelligent Control function of N+1 radio frequency (RF) high power intelligent synthesis system; The output of thereupon fault being launched main frame automatically switches in the load, and on the filter input port that is outputted to this master transmitter correspondence with backup emission main frame, the Based Intelligent Control function of N+1 radio frequency (RF) high power intelligent synthesis system is finished.
Next N+1 Digital Television emission system management control center is finished remaining switching flow more automatically, starts auxiliary transmitter, finishes the switching of video/audio signal, and auxiliary transmitter begins operate as normal, substitutes out of order master transmitter.It is normal that N+1 Digital Television emission system is recovered, and the fault transmitter is shut down maintenance.
After the maintenance of fault transmitter is finished, restart, the power that N+1 Digital Television emission system management control center detects master transmitter has recovered normal, again close master transmitter and auxiliary transmitter, start N+1 radio frequency (RF) high power intelligent synthesis system management software once more, implement the intelligence restoration function of N+1 radio frequency (RF) high power intelligent synthesis system; Assign instruction for the coaxial switch controller, automatically auxiliary transmitter is outputted in the load, and automatically master transmitter output is switched back on the original filter input port, the intelligence restoration function of N+1 radio frequency (RF) high power intelligent synthesis system is finished.
Next the N+1 Digital Television emission system management control center master transmitter that resets automatically, N+1 Digital Television emission system is recovered N platform master transmitter normal operating conditions, and auxiliary transmitter is in (cold standby) state of closing.
The Based Intelligent Control functional software flow chart of N+1 radio frequency (RF) high power intelligent synthesis system is seen " description of drawings " Fig. 3.
The intelligence restoration functional software flow chart of N+1 radio frequency (RF) high power intelligent synthesis system is seen " description of drawings " Fig. 4.
Intelligence coaxial switch group has N platform intelligence dynaform controller, in order to the intelligent coaxial switch of control N high-power RF (RF), the intelligent coaxial switch of each high-power RF (RF) has two-way radio frequency (RF) input port and two-way radio frequency (RF) delivery outlet, take the mode of tandem compound, realize that " N+1 " road high-power RF (RF) switches.Intelligence dynaform controller is controlled by the embedded computer monitoring software, has to be used for the network interface of control automatically.Its operating state can show intuitively by panel.Intelligence coaxial switch group has position transducer, after guaranteeing that intelligent coaxial switch conversion puts in place, could start the high-power transmitter that is supported.Intelligence coaxial switch group can be supported manually and automatically switch local and remote switching; The priority of manual switchover is higher than automatic switchover.The function that this intelligent coaxial switch group has is as follows:
1) has terminal transmitter state recognition function;
2) manually, controlled function is optional automatically;
3) when being located at auto state, but the emission system unattended operation;
4) precise control, reliable and stable.
The intelligence of coaxial switch group is mainly reflected in following three aspects: 1, webmaster communication function; 2, position sensing measuring ability; 3, automatic servo handoff functionality.
Each intelligent coaxial switch in the intelligence coaxial switch group all is made up of coaxial switch and corresponding intelligent coaxial switch controller.
The intelligent coaxial switch of each high-power RF (RF) has two-way radio frequency (RF) input port and two-way radio frequency (RF) delivery outlet; A drive motors and two position-detection sensors are installed, be used to drive intelligent coaxial switch and between the two-way input and output, change switching, and accurately perception, control, affirmation intelligence coaxial switch rotate in place, avoid coaxial switch to rotate the catastrophe failures such as sparking in transmitter zero load or the coaxial switch, arcing that cause not in place, cause heavy losses such as burning out transmitter.Owing to possess the webmaster communication function, intelligent coaxial switch can be with information uploading N+1 radio frequency (RF) the high power intelligent synthesis system platforms such as location status of oneself, and accept the instruction that it sends, and implement corresponding control.
Certainly, each intelligent coaxial switch also must be able to bear, reprint corresponding radio frequency (RF) high-power signal, as radio frequency (RF) high-power signals such as 500W, 1000W, 2000W, 3000W.
Intelligence coaxial switch embedded software flow chart is seen " description of drawings " Fig. 5.
The synthesis system of multi-path digital television emission system has comparatively harsh requirement to band pass filter, and inserting loss, squareness factor (selectivity) and temperature stability is its most important index.
It is big more to insert loss, will allow many more radio frequencies (RF) power signal can not send out in this loss; Except wasting energy, the radio frequency of loss (RF) power signal converts temperature rise at this; The filter temperature raises, and will cause frequency characteristic drift and job insecurity.
Squareness factor is high more, and the filtering characteristic of filter is good more, is suitable for multi-path adjacent frequency work more; But squareness factor is high more, the difficult more control of its passband fluctuation, and outer inhibition of band also becomes difficult, restricts the application of its multi-path adjacent frequency work again conversely.
The variations in temperature of filter causes frequency drift; This frequency stability to filter is vital.Frequency drift is excessive, the good again meaning that also loses of other indexs.And frequency characteristic is more scabrous problem with temperature drift always.Though produced a lot of solutions for this reason, the application in conjunction with actual is suitable for producing in batches, from the volume to the price, all superior filter of performance still difficulty ask.
Because the accumulation of long-term specialty research and knowhow has been obtained a large amount of utility datas and has been calculated simulation modular, introduces the application of computer simulation technique.The cavity band-pass filter of our design makes the insertion loss low, the squareness factor height, and the frequency temperature drift is little; Volume is little, and temperature rise is low, and working stability is reliable.
The feature of band pass filter group is that cavity elliptic function high power filter has adopted the cross-couplings technology; Especially the preferred employing of technique for temperature compensation, mainly research is the linear expansion of different metal material and the relation between the temperature-compensating; The present invention is the inventor through long-term research and development, has grasped rich practice experience and has originality.
About inserting loss
Filter insertion loss is defined as at center frequency points f
0The insertion loss value of point.Its size is relevant with operating frequency, and for example certain money is in the UHF filter operating, and inserting loss when UHF low side 470MHz is≤0.35dB then to insert loss to high-end 860MHz and can only accomplish≤0.37dB.
It is also relevant with power capacity to insert loss value.Power capacity is big more, and the cavity internal and external conductor is also big more, and the insertion loss is also just more little.For example certain 2.5kW filter can be accomplished≤0.34dB at low frequency end, and another 200W filter can only reach≤0.38dB.
Insert loss not only with the fine or not direct correlation of design, also and manufacturing process confidential relation is arranged.The loss of cavity includes the ohmic loss that the cavity electric current flows through conductive surface, the contact resistance loss of connector and tuned cell, and the loss that welding quality is introduced also has the unsuitable medium of cavity, also can introduce dielectric loss.Once we attempt to support with the teflon rod inner wire that cavity is very long, and Insertion Loss has increased 0.07dB significantly as a result.
The filter of an excellent in design must have good processing technology to guarantee, electroplating quality, adjustment quality all will obtain guaranteeing just can obtain lower insertion loss.We once ran into, and with the difference manufacturing of a design drawing, it is very big to insert the loss difference.In this, the present invention has the technological know-how of processing.
Selectivity and temperature stability thereof to band pass filter is elaborated below.
Selectivity about band pass filter
Spectrum energy outside the television channel bandwidth mainly relies on suitable filters to suppress.
The out of band spectrum template of GB GB20600-2006 has two kinds, a kind of is not strict template: when digital transmitter and simulating transmitting machine (Phase Alternation Line system) are positioned at same transmitting station, and it is frequently adjacent or adjacent down frequently the time that the frequency spectrum that digital TV transmitter uses is positioned at going up of simulated television transmitter, can use not strict template.Here the both is the transmitter with power grade, if the transmitting power difference need be revised in proportion.Another kind is strict template: when the adjacent channel of digital television signal is used for other service (as littler transmitting power), need the promptly strict template of the outer decay of high-band.
By after the top analysis as seen: " strictness " or " not strict " all is that the type and the power difference that are disturbed transmitter are very big frequently at same transmitting station adjacent up and down, adjacent frequently with every just not making demands especially frequently.
The breakover point data of a kind of template of two kinds of templates of GB and Mobile Multimedia Broadcasting transmitter see Table one, table two.
Table one, GB not the breakover point of strict template (4f is relative f
0Value)
The breakover point of table two, the strict template of GB
| Δf(MHz) | -12 | -6 | -4.2 | -3.8 | +3.8 | +4.2 | +6 | +12 |
| Frequency spectrum (dB) | -120 | -95 | -83 | -32.8 | -32.8 | -83 | -95 | -120 |
Relevant intersection feedback remarks additionally as follows again.
If not adopting to intersect, the Digital Television filter do not feed back f
0The selectivity of ± 4.2MHz may not reach-4dB, so it is the digital filter indispensability, can adopt capacitive feedback and inductive feedback, carefully adjusts its degree of coupling and can reach best selectivity.But the place that a contradiction is arranged: it is tight more to be coupled, and selectivity is good more; But the bulge projection on both sides is high more, makes f like this
0Near ± the 6MHz selectivity has degenerated.
The waveform characteristic figure of relevant filter sees " description of drawings " Fig. 6.
Wishing has second absorption point just in time to be absorbed in the bulge of first generation.But in the coaxial resonant cavity filter, be much to seek such structure.Such two groups of absorption points are only arranged in bimodulus column type resonant cavity filter.
About temperature stability
Even all locked the jail with coaxial resonant cavity locking device when adjusting that metal material is done, but because the effect of expanding with heat and contract with cold can make also curve produce drift.Most importantly the linear expansion meeting when heating up of inner wire tube makes Frequency Response drift about to low frequency end.Can reduce drift after having adopted temperature-compensating, but also will prevent to compensate transition, curve can drift about to high band when heating up like that.Compensation suitably is only needed.
Temperature stability index arrival≤2kHz/K of the present invention.
" description of drawings " Fig. 7 and 8 is explanations of temperature-compensating.No temperature compensation measure rises to the 50 alignment left side drifts of writing music by normal temperature; The temperature compensation measure is arranged, rise to 70 degree by normal temperature, curves shift is very little.
The feature of synthesizer group is the application of computer simulation technique in the radio-frequency technique design.The appliance computer emulation technology, the 3dB directional coupler that the correlation frequency division is joined and synthesized designs and calculates, to obtain the accurate coupling of accurate distribution ratio and input impedance, physical dimension can adapt to the best of breed of various synthesis systems, thereby saved more switching device, reduce the insertion loss, improved efficient; It is extremely low that the synthetic loss of whole N+1 radio frequency (RF) high power intelligent synthesis system is reduced to, even in the system of " 8+1 ", synthetic loss of the present invention also can be hanged down and be reached 1.2dB.
The synthesizer group is formed by connecting by asterism formula synthesizer and bridge-type synthesizer.
Asterism formula synthesizer operation principle block diagram is seen " description of drawings " Fig. 9.
The signal of two channels of asterism type synthesizer passes through respectively after the corresponding band pass filter, delivers to threeway with two special cables of adjusting of length warp or feedback pipe (L1 or L2) again and goes to synthesize, can be by the output of output feedback pipe after synthesizing.
The input interface of asterism type has the branch of high channel input port and low channel input port, must not wrong! Be the coupling of improvement with transmitter, each input port all is connected to tuner.
The back level is the bridge-type synthesis system, bridge-type synthesizer elementary unit groups prejudice " description of drawings " Figure 10.
The used 3dB of synthesizer group is branch's line style high-power (4-5kW) 3dB directional coupler, and final stage is a 10kW coupling line style 3dB directional coupler.Filter is six chamber band pass filters.
4. 3. the F1 signal holding the two-way that is divided into 90 ° of phase differences from end input.Article two, filter branches should be isometric line, and phase difference is almost 0 °.Input at second 3dB then is the signal of 90 ° of two phase differences, and at the 4th end, two-way phase place identical (all being 90 °) power is combined to.And 3. holding two paths of signals to differ from 180 °, no-output as a result.
Deliver to the 2nd 3dB by the F2+F3 signal of star-like synthesizer output and 3. hold, this port belongs to the input port, broadband, and except that F1, other vast frequency domains can enter.F2+F3 is from after 3. end enters, in second 3dB, divide two routes 2. and 1. end go to two band pass filters of F1, the result is returned by total reflection, has only reflected wave phase place to 4. end identical and superpose, and is 3. holding no-output.
Because filter is to the impossible total reflection of F2+F3, so should be absorbed by absorbing load R.The long and is to export for F1+F2+F3 is synthetic at 4. end.
Just can form many (N) road synthesizer group by asterism formula synthesizer and the cascade of a plurality of bridge-type synthesizer, together with filter, intelligence coaxial switch group and N+1 radio frequency (RF) high power intelligent synthesis system management software (platform) have been formed N+1 radio frequency (RF) high power intelligent synthesis system jointly.
" description of drawings " Figure 11 is the typical case of one No. six synthesizer group.
Load is that the N+1 television emission system is necessary, is auxiliary transmitter and the required configuration of system's switching; Guarantee that arbitrary transmitter all is connected in the effective load reliably, work safety under the free position of emission system.
As typical case, see " description of drawings " Figure 12 through the spectrum of radio frequency signals photo of 7 road 1000W " 7+1 " the national standard digital television emission system of N+1 radio frequency (RF) high power intelligent synthesis system output.
As seen from the figure, the complete adjacent intelligence of " 7+1 " RF high power frequently synthesis system realizes that successfully output meets " GB GB20600-2006 " radiofrequency signal; Whole " N+1 " GB terrestrial digital TV emission system is successfully runed.
Claims (6)
1.N+1 radio frequency (RF) high power intelligent synthesis system comprises N+1 radio frequency (RF) high power intelligent synthesis system management software (platform), switch, synthesizer group, band pass filter group, intelligent coaxial switch group and load.
2. N+1 radio frequency as claimed in claim 1 (RF) high power intelligent synthesis system, it is characterized in that, system is at computer---under the control of N+1 radio frequency (RF) high power intelligent synthesis system management software (platform), operating state according to " N+1 television emission system ", intelligently the N+1 road RF power signal end of N+1 platform transmitter output is selected N road useful signal to bank of filters, the 1 tunnel does not break down and temporary transient useless signal is connected to load as yet at master transmitter; Native system and N+1 Digital Television emission system management control center carry out information exchange, that is: N platform master transmitter is arranged in work in the N+1 Digital Television emission system during normal condition, when in case certain emission main frame breaks down in the N+1 Digital Television emission system, N+1 Digital Television emission system management control center enters switching flow automatically, the main frame of closing fault emission automatically, start the system management software of the present invention thereupon, realize the Based Intelligent Control of N+1 radio frequency (RF) high power intelligent synthesis system and the function of intelligence restoration.
3. N+1 radio frequency as claimed in claim 1 (RF) high power intelligent synthesis system, it is characterized in that, intelligence coaxial switch group has N platform intelligence dynaform controller, in order to the intelligent coaxial switch of control N high-power RF (RF), the intelligent coaxial switch of each high-power RF (RF) has two-way radio frequency (RF) input port and two-way radio frequency (RF) delivery outlet, take the mode of tandem compound, realize that " N+1 " road high-power RF (RF) switches.
4. intelligent coaxial switch group as claimed in claim 3, a drive motors and two position-detection sensors are installed, be used to drive intelligent coaxial switch and between the two-way input and output, change switching, and accurately perception, control, affirmation intelligence coaxial switch rotate in place, avoid coaxial switch to rotate the catastrophe failures such as sparking in transmitter zero load or the coaxial switch, arcing that cause not in place, cause heavy losses such as burning out transmitter; And because this intelligent coaxial switch group possesses the webmaster communication function, intelligent coaxial switch can be accepted the instruction that it sends with information uploading N+1 radio frequency (RF) the high power intelligent synthesis system platforms such as location status of oneself, implements corresponding control; Its operating state can show intuitively by panel.
5. intelligent coaxial switch group as claimed in claim 3 is characterized in that, intelligent coaxial switch group has following function:
1) has terminal transmitter state recognition function;
2) manually, controlled function is optional automatically;
3) when being located at auto state, but the emission system unattended operation;
4) precise control, reliable and stable.
6. N+1 radio frequency as claimed in claim 1 (RF) high power intelligent synthesis system is characterized in that the elliptic function high power filter of band pass filter group has adopted the combination of cross-couplings technology and technique for temperature compensation; Temperature sensor technology and computer technology have promptly been adopted, make many expansion coefficients of metal wire precisely corresponding one by one with the relation between the temperature-compensating, to make full use of the best collocation of resonant cavity material, shape and size, obtain good temperature characterisitic, so that entire system obtains high frequency stability.
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| CN102625134A (en) * | 2012-03-07 | 2012-08-01 | 成都新光微波工程有限责任公司 | Intelligent monitoring comprehensive platform of N+1 digital television emission system |
| CN103326745A (en) * | 2013-06-28 | 2013-09-25 | 成都凯腾四方数字广播电视设备有限公司 | Terrestrial digital television broadcasting redundancy transmitting device and redundancy method |
| CN103686160A (en) * | 2014-01-02 | 2014-03-26 | 成都新光微波工程有限责任公司 | Universal digital television emission intelligent monitoring switching system and switching method |
| CN104301721A (en) * | 2014-10-30 | 2015-01-21 | 成都新光微波工程有限责任公司 | Monitoring and management system of N+1 digital television transmitting device |
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| CN102625134A (en) * | 2012-03-07 | 2012-08-01 | 成都新光微波工程有限责任公司 | Intelligent monitoring comprehensive platform of N+1 digital television emission system |
| CN103326745A (en) * | 2013-06-28 | 2013-09-25 | 成都凯腾四方数字广播电视设备有限公司 | Terrestrial digital television broadcasting redundancy transmitting device and redundancy method |
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| CN104320599A (en) * | 2014-10-30 | 2015-01-28 | 成都新光微波工程有限责任公司 | 1+1 main emission system and backup emission system controller |
| CN106878641A (en) * | 2017-02-15 | 2017-06-20 | 河南省无线发射传输管理中心 | A kind of high-power universal transmitter of Whole frequency band multichannel realizes device and method |
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Application publication date: 20111012 |