CN2141155Y - Broadcast signal transmission equipment for tv transmitter - Google Patents
Broadcast signal transmission equipment for tv transmitter Download PDFInfo
- Publication number
- CN2141155Y CN2141155Y CN 92206109 CN92206109U CN2141155Y CN 2141155 Y CN2141155 Y CN 2141155Y CN 92206109 CN92206109 CN 92206109 CN 92206109 U CN92206109 U CN 92206109U CN 2141155 Y CN2141155 Y CN 2141155Y
- Authority
- CN
- China
- Prior art keywords
- signal generator
- broadcast singal
- circuit
- color signal
- television
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Radio Relay Systems (AREA)
- Details Of Television Systems (AREA)
Abstract
The utility model has the function of exploiting TV transmitter, can relay TV programs and can convey broadcast signals, one machine two purposes. The utility model is composed of a color signal generator, an audio pre-amplifier circuit, and a power circuit three parts. The utility model has the advantages of simple structure and convenient operation. When the utility model saves fund and saves frequency resources, the utility model is convenient to realize conveying broadcast signals at TV station and founds broadcast publicity nets in coverage range of power of the TV transmitter.
Description
The utility model relates to a kind of television transmitter that utilizes and transmits the broadcast singal device.
At present, rural wired broadcast network is owing to the reason of aspects such as fund and management is being dwindled year by year, and rural broadcasting network has been set up with FM broadcasting in some place, but because fund input is big, the acquisition frequency resource, this radio network also is difficult to development.On the other hand, a large amount of television relays station has been set up in mountain area, rural area, but it is only as rebroadcast television program, and does not utilize its sound channel emission broadcast singal.
The purpose of this utility model is the function of exploitation television transmitter, makes its not only relay television but also can transmit broadcast singal, accomplishes dual-use, just can set up the broadcast publicity net in the power coverage at transmitter setting up this device on the basis at television relay station.
It is higher that the utility model is achieved in that color signal generator produces a precision, output amplitude V
P-PThe colour of=1V is the TV pattern signal entirely, sends into the video modulation end of transmitter, as the usefulness of the sign of launching broadcast singal with the synchronous top power that guarantees transmitter.Deliver to the audio input port of transmitter after the pre-amplification circuit amplification of broadcast singal (microphone or recorded audio signals) by a wide dynamic range, Gain Adjustable,, in the electric wave area of coverage, use the television receiver receiving broadcast signal for the transmitter emission.Color signal generator, the power supply of audio frequency pre-amplification circuit is supplied with by a 12V D.C. regulated power supply.At the signal output part of color signal generator, the signal output part of audio frequency advance signal circuit, the output of 12V D.C. regulated power supply, with three groups of switches connections of triac device.Between the signal output part and tv signal input that one group is connected in color signal generator, another group is connected between audio frequency preamplifier signal output part and the television audio signals input, between the power input that the 3rd group is connected in 12V power supply and color signal generator, audio frequency pre-amplification circuit.When the conversion triac device, can reach the purpose that conversion transmits broadcast program and relay television.
Below in conjunction with accompanying drawing the utility model is done concrete description.
Figure one is a principle block diagram of the present utility model.
With reference to accompanying drawing, the utility model is by color signal generator (1), audio frequency pre-amplification circuit (2), and power circuit (3) three parts are formed.Use triac device K between their output
1a, K
1b, K
1cConnect.K
1aBe connected between the video signal input terminal (4) of the signal output part of color signal generator (1) and TV programme K
1bBe connected between the output and TV signal sound accompaniment input (7) of audio frequency pre-amplification circuit (2) K
1cBe connected between the power input and power circuit (3) of color signal generator (1), the preposition amplification appliance of audio frequency (2).
For the colour pase that makes colour signal is accurate, the lock-out pulse standard, color signal generator (1) is selected computer storage-type color bar generator for use.For the stability and its load capacity of raising that guarantee color signal generator (1), the VT of color signal generator (1) is connected to by BG, R
1, R
2, R
3, R
4, the emitter follower that constitutes, R
1Be adjustable resistance, can change the output amplitude of color bar signal, to adapt to the television transmitter of different model and power grade.R
1In application, set up, behind this device connecting system, adjust R
1Make the power output of transmitter reach standard, do not occur the ovennodulation state again and both can.When if the audio frequency pre-amplification circuit selects for use integrated circuit BA301 to use this circuit usually, its gain is determined, for the incoming level that adapts to various intensity with guarantee have suitable level to send into transmitter, between the inverting input of audio amplifier circuit (2) and signal output part, be provided with by R especially
5, R
6, C
2Composition is with R
5Be the adjusting gain circuitry of adjustable resistance, R
5Generally get 6.5K,, then get numerical value, otherwise then get numerical value, so just can adapt to the television transmitter of various power grades greater than 6.5K less than 6.5K if the audio signal that transmitter sends has the ovennodulation distortion.TV signal port (4) connects the vision signal of TV programme with it, and television field frame is by port (7) input, and built-in microphone (5) can directly utilize the speech of this device, and external broadcast singal is imported by jack (6).The output of vision signal (8), audio output (9) is sent video, audio signal into transmitter, triac device K
1Be used to change rebroadcast television program or transmit broadcast singal, K
2Be mains switch, the utility model is connected between TV signal and the transmitter signal input, conversion K
1Promptly can be used for relay television or transmit broadcast singal.
Use the utility model, can save fund, save frequency resource, utilize the vacant time of rebroadcast television program to transmit broadcast singal very easily, the television relay station that is particularly useful for mountain area, rural area, be the favourable instrument of strengthening the rural area propaganda work, than in wired broadcasting or FM broadcasting its special advantages is arranged.
Claims (6)
1, a television transmitter of being made up of color signal generator (1), audio frequency pre-amplification circuit (2), power circuit (3) transmits the broadcast singal device, it is characterized in that using triac device K between the output of color signal generator (1), audio frequency pre-amplification circuit (2), power circuit (3)
1Connect K
1aBe connected between the signal output part and television video frequency signal input (4) of color signal generator (1), K1b is connected between the signal output part and television field frame input (7) of audio frequency pre-amplification circuit (2), K
1cBe connected between the power input and power circuit (3) of color signal generator (1), audio frequency pre-amplification circuit (2), power circuit (3) adopts the direct current regulation circuit of 12V.
2, transmit the broadcast singal device by the described television transmitter of claim 1, it is characterized in that adopting computer storage-type color bar generator at color signal generator (1).
3, television transmitter according to claim 1 and 2 transmits the broadcast singal device, it is characterized in that being connected to BG, R at the signal output part of color signal generator (1)
1, R
2, R
3, R
4, the emitter follower of composition.
4, television transmitter according to claim 3 passes the broadcast singal device, it is characterized in that R
1Be adjustable resistance.
5, television transmitter according to claim 1 transmits the broadcast singal device, it is characterized in that being connected to R between the inverting input of audio frequency pre-amplification circuit (2) and the signal input part
5, R
6, C
2The gain adjusting circuit of forming.
6, television transmitter according to claim 5 transmits the broadcast singal device, it is characterized in that R
5Be adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206109 CN2141155Y (en) | 1992-03-27 | 1992-03-27 | Broadcast signal transmission equipment for tv transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206109 CN2141155Y (en) | 1992-03-27 | 1992-03-27 | Broadcast signal transmission equipment for tv transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2141155Y true CN2141155Y (en) | 1993-08-25 |
Family
ID=33761921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92206109 Expired - Fee Related CN2141155Y (en) | 1992-03-27 | 1992-03-27 | Broadcast signal transmission equipment for tv transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2141155Y (en) |
-
1992
- 1992-03-27 CN CN 92206109 patent/CN2141155Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |