SFN (single frequency network) tester for terrestrial digital television
A terrestrial digital TV and single frequency network technology, applied in TV, electrical components, transmission monitoring, etc., can solve the problem of inconvenient carrying of instruments, achieve the effect of convenient operation, simple use, and guarantee of authenticity
Pending Publication Date: 2018-03-09
安徽汇鑫电子有限公司
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Problems solved by technology
[0004] At present, there is no tester specifically for SFN on the market. How to judge whether a SFN is formed is mainly to test the signal spectrum in the overlapping area of the two transmitters; this requires carrying many instruments, and the overlapping area may be in the In the field, the instrument is inconvenient to carry; now design a terrestrial digital TV single frequency network tester
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0021] see figure 1 As shown, the present invention is a terrestrial digital television single frequency network tester, including a device body; the device body includes: a receiving antenna, a GPS positioning module, a microcontroller, a spectrum analysis module, a tuner and an expansion interface;
[0022] After receiving the TV signal, the receiving antenna transmits it to the microcontroller; the microcontroller transmits the signal to the spectrum analysis mo...
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The invention discloses an SFN (single frequency network) tester for a terrestrial digital television and relates to the technical field of television signal testing. The SFN tester comprises a devicebody; a receiving antenna receives a television signal and transmits the television signal to a microcontroller; the microcontroller transmits the signal to a frequency spectrum analysis module and atuning unit; the tuning unit broadcasts a radio-frequency signal after performing tuning decoding on the received radio-frequency signal; the frequency spectrum analysis module is used for testing frequency spectrum of the received radio-frequency signal; a GPS positioning module is connected with the microcontroller. The signal emitted by an SFN emitter is analyzed through the frequency spectrumanalysis module, whether SFN networking succeeds is judged according to an analysis result, an audio / video broadcasting unit is used for broadcasting, meanwhile, subjective testing and objective testing are performed, the authenticity of the test result is guaranteed, a test area is positioned through the GPS positioning module, seeking of a test area by a worker is facilitated, and the SFN tester is simple to use and convenient to operate.
Description
technical field [0001] The invention belongs to the technical field of TV signal testing, in particular to a terrestrial digital TV single frequency network tester. Background technique [0002] Terrestrial digital TV networking methods include multi-frequency networking and single-frequency networking. As one of the important networking methods of the terrestrial digital TV broadcasting system, the single frequency network will usher in a period of rapid development with the development of terrestrial digital TV, and the national standard (DTMB standard) terrestrial digital TV single frequency network will also follow The promotion and internationalization of the DTMB standard has been adopted by more countries and regions, and its promotion prospect is broad. [0003] Single Frequency Network (SFN: Single Frequency Network) is a terrestrial digital TV coverage network composed of multiple transmitters located in different locations and in a synchronized state. Each transm...
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IPC IPC(8): H04N17/00H04B17/309H04W64/00
CPCH04B17/309H04N17/004H04W64/00
Inventor 季旭东
Owner 安徽汇鑫电子有限公司