CN209627564U - A kind of KU wave band multi-user DCSS tuner - Google Patents

Abstract

The utility model relates to a kind of KU wave band multi-user DCSS tuners, including RF amplifying circuit, bandpass filter, low power consumption integrated circuit, digital signal integrated circuit；RF amplifying circuit receives horizontal signal and vertical signal, after the amplification of RF amplifying circuit, then by band-pass filter, is sent into low power consumption integrated circuit mixing, low power consumption integrated circuit is connected to digital signal integrated circuit, and last IF output is connected to set-top box.The utility model uses digital signal integrated circuit, with the circuit design of digital channel superimposing technique and optimization, realizes in single coaxial cable, multiple user's set-top boxes can be supported to use.

Description

A kind of KU wave band multi-user DCSS tuner

[technical field]

The utility model relates to satellite TV reception technologies, and in particular to a kind of KU wave band multi-user DCSS tuner.

[background technique]

Currently, the mankind are very extensive by satellite transmission signal, especially receive satellite broadcasting television letter using tuner Number field.For the band limits of KU wave band in 10700MHz between 12750MHz, KU wave band tuner is exactly to receive KU wave band Downward signal of satellite, faint vision signal is modified and is amplified, shields interference signal to guarantee the stability of image, Export the demodulated reduction TV signal of intermediate-freuqncy signal of 950~2150MHz.

It is used currently, 1 user's set-top box (STB) can only be met by 1 cable transmission, if provided to multiple users Service must rewiring and hardware installation, this tuner operation cost is high, and the market competitiveness is low, how with a tuner Pass through 1 cable transmission and meet multiple users and use, has become the extremely urgent technical problem in the field.

[utility model content]

To solve the above problems, the purpose of this utility model is to provide a kind of KU wave band multi-user DCSS tuners, with 1 Root cable supports multi-user to receive satellite-signal simultaneously, provides completely flexible channel selection.

To achieve the above object, the utility model mainly adopts the following technical scheme that

A kind of KU wave band multi-user DCSS tuner, including RF amplifying circuit, bandpass filter, low power consumption integrated circuit, Digital signal integrated circuit；RF amplifying circuit receives horizontal signal and vertical signal, after the amplification of RF amplifying circuit, then passes through Bandpass filter output signal, is sent into low power consumption integrated circuit mixing, and low power consumption integrated circuit is connected to the integrated electricity of digital signal Road, last IF output are connected to set-top box.

The digital signal integrated circuit is that full frequency band captures satellite-signal superimposer, and internal structure includes being sequentially connected Rf inputs, digital channel crossbar switch, 32 channels, channel superimposer, medium frequency output end.

The rf inputs are to receive the signal from low power consumption integrated circuit output, while carrying out modulus to signal Conversion and digital signal automatic gain control, are intersected with realizing the optimum efficiency after signal analog-to-digital conversion and being transported to digital channel Switch.

The digital channel crossbar switch is that any one frequency of the Any Digit signal in input is mapped to 32 Any one of a channel channel.

32 channels are the digital selection of signal progress and filtering by may be programmed formula to input, and independent defeated It is sent to Signal averaging device.

The Signal averaging device is to pass through Digital Frequency Synthesize for selecting 32 transponders in the input of any radio frequency Device, the selected frequency being converted into 950-2150MHz, and ensure that any combination is separated with output.

The medium frequency output end is the signal for receiving the output of Signal averaging device, and uses digital-to-analogue parallel operation conversion output 950- The intermediate-freuqncy signal of 2150MHz.

The digital signal integrated circuit uses the BCM4554 integrated circuit of company, Botong.

The digital signal integrated circuit output connection triplexer, reconnects IF amplifier circuit output.

The bandwidth-limited circuit is also connected with low current collection into tuning circuit, forms simulation output.

Compared with prior art, the utility model has the following beneficial effects:

The height of the digital channel superposition switching of the KU wave band of new generation that the utility model proposes a kind of towards world market Frequency head, the tuner in the utility model receive the band limits of downward signal of satellite in 10700MHz between 12750MHz, Using the digital channel superimposing technique of digital signal integrated circuit and the circuit design of optimization, realize in single coaxial cable On, multiple (16-32) user set-top boxes (STB) can be supported to use.

In addition it also proposes a kind of multifunctional circuit design concept, have output two kinds of functions of analog signal and digital signal, Meeting a user more than 91 uses and supports MoCA and HD video to receive.

[Detailed description of the invention]

Fig. 1 is the module diagram of the utility model preferred embodiment one；

Fig. 2 is digital signal integrated circuit schematic in the utility model preferred embodiment one；

Fig. 3 is the module diagram of the utility model preferred embodiment two；

Fig. 4 is triplexer circuit schematic diagram in the utility model preferred embodiment two.

[specific embodiment]

It please refers to shown in Figure of description 1-2, is the one of embodiment of the utility model, 32 use at most may be implemented Family uses simultaneously.The component being mainly concerned with includes RF amplifying circuit 1, bandpass filter 2, low power consumption integrated circuit 3, number letter Number integrated circuit 4.

RF amplifying circuit 1 receives horizontal signal and vertical signal, after the amplification of RF amplifying circuit, is passing through bandpass filtering Device 2 is sent into low power consumption integrated circuit 3, the local oscillator of the radiofrequency signal of bandpass filter output and low power consumption integrated circuit 3 is done mixed After frequency, 250-2350MHz signals are exported, low power consumption integrated circuit 3 is connected to digital signal integrated circuit 4, last IF (intermediate frequency Signal) output be connected to set-top box 5.The operating voltage of RF amplifying circuit 1 is controlled by low power consumption integrated circuit 3 simultaneously.

Digital signal integrated circuit uses the BCM4554 integrated circuit of company, Botong in the present embodiment, is a kind of full frequency band Capture satellite-signal superimposer.Design uses in the present invention, and internal mainly includes following module: rf inputs 41,42,32 channels 43, channel superimposer 44, medium frequency output ends 45 of digital channel crossbar switch.

Rf inputs 41 are to receive the signal exported from low power consumption integrated circuit 3, while carrying out modulus to signal and turning It changes and digital signal automatic gain controls, opened with realizing the optimum efficiency after signal analog-to-digital conversion and being transported to digital channel intersection Close 42.Digital channel crossbar switch 42 is that any one frequency of the Any Digit signal in input is mapped to 32 channels 43 Any one of channel, without any restrictions.32 channels 43 are to carry out number to the signal of input by may be programmed formula Selection and filtering, and independently it is transported to Signal averaging device 44.Signal averaging device 44 is for selecting 32 in the input of any radio frequency Transponder, by digital frequency synthesizer, the selected frequency being converted into 950-2150MHz, and ensure any combination with Output separates.Medium frequency output end 45 is the signal for receiving Signal averaging device 44 and exporting, and uses digital-to-analogue parallel operation conversion output 950- The intermediate-freuqncy signal of 2150MHz.Set-top box 5 is connected to after output.

Digital channel superimposing technique is used in the present embodiment, is converted by high-speed ADC (modulus) converter and DAC (digital-to-analogue) Device is converted into intermediate-freuqncy signal (IF) output to user's set-top box (STB) from the signal of satellite reception for all, and the present embodiment passes through Full-digital circuit control demodulation can reset operating mode (i.e. dynamic or static) by programmable device, and dynamic mode supports 16-32 A user receives the demand of satellite-signal simultaneously, and static schema supports unlimited user, provides completely flexible channel selection, supports More set-top boxes, single line are widely used.

It is another embodiment of the utility model turning also now to Fig. 3 and Fig. 4, compares embodiment one, in the present embodiment two, In After digital signal integrated circuit 4 exports, a triplexer 6 is connected, is exported using IF after IF amplifier circuit 7.Meanwhile in band Bandpass filter circuit 2 is also connected with low current collection into tuning circuit 8, forms analog signal output all the way.

Triplexer 6 as shown in figure 4, internal use lc circuit structure, by an input signal be changed into three it is identical defeated Signal out.Low current collection is by the radiofrequency signal of bandpass filter output and low current collection into tuning circuit 8 at tuning circuit 8 After local oscillator is mixed, 950-2150MHz intermediate-freuqncy signals are exported.

Therefore in the present embodiment two, can both there be analog signal output all the way, there can also be the output of multi-path digital signal, And in example 1 on 32 user bases, then meets a user more than 90 while receiving the multiple functions of satellite-signal.

Above specific embodiment is only the preferred embodiment of this creation, all in this wound not to limit this creation Any modification, equivalent substitution, improvement and etc. done within the spirit and principle of work, should be included in this creation protection scope it It is interior.

Claims (10)

1. a kind of KU wave band multi-user DCSS tuner, it is characterised in that: including RF amplifying circuit, bandpass filter, low-power consumption Integrated circuit, digital signal integrated circuit；RF amplifying circuit receives horizontal signal and vertical signal, amplifies by RF amplifying circuit Afterwards, then by band-pass filter, it is sent into low power consumption integrated circuit mixing, low power consumption integrated circuit is connected to digital signal collection At circuit, last IF output is connected to set-top box.

2. a kind of KU wave band multi-user DCSS tuner as described in claim 1, it is characterised in that: the digital signal collection It is that full frequency band captures satellite-signal superimposer at circuit, internal structure includes sequentially connected rf inputs, digital channel friendship Fork pass, 32 channels, channel superimposer, medium frequency output end.

3. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: the rf inputs It is to receive the signal from low power consumption integrated circuit output, while analog-to-digital conversion and digital signal automatic gain control are carried out to signal System, to realize the optimum efficiency after signal analog-to-digital conversion and be transported to digital channel crossbar switch.

4. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: the digital channel is handed over It is that any one frequency of the Any Digit signal in input is mapped to any one of 32 channels channel that fork, which is closed,.

5. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: 32 channels are Digital selection and filtering are carried out to the signal of input by may be programmed formula, and are independently transported to Signal averaging device.

6. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: the Signal averaging device It is to be converted into 950-2150MHz for 32 transponders of selection in the input of any radio frequency by digital frequency synthesizer Selected frequency, and ensure any combination with output separate.

7. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: the medium frequency output end It is to receive the signal of Signal averaging device output, and use the intermediate-freuqncy signal of digital-to-analogue parallel operation conversion output 950-2150MHz.

8. a kind of KU wave band multi-user DCSS tuner as claimed in claim 2, it is characterised in that: the digital signal collection The BCM4554 of company, Botong is used at circuit.

9. a kind of KU wave band multi-user DCSS tuner as described in claim 1, it is characterised in that: the digital signal collection Triplexer is connected at circuit output, reconnects IF amplifier circuit output.

10. a kind of KU wave band multi-user DCSS tuner as described in claim 1 or 9, it is characterised in that: the band logical filter Wave device is also connected with low current collection into tuning circuit, forms simulation output.