CN101115041A - Multi-frequency FM transmitter - Google Patents
Multi-frequency FM transmitter Download PDFInfo
- Publication number
- CN101115041A CN101115041A CNA2007101311192A CN200710131119A CN101115041A CN 101115041 A CN101115041 A CN 101115041A CN A2007101311192 A CNA2007101311192 A CN A2007101311192A CN 200710131119 A CN200710131119 A CN 200710131119A CN 101115041 A CN101115041 A CN 101115041A
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- frequency
- transmitter
- frequency modulation
- power amplifier
- actuators
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Abstract
A multi-frequency FM transmitter belongs to the technical field of wireless transmission, aiming at providing a multi-frequency FM transmitter which can broadcast a plurality of sets of programs at the same time and at the same speed on the same machine. The technical key points lie in that the transmitter is provided with a plurality of frequency modulation actuators, the input ends of which are respectively and correspondingly connected with the output end of a multi-channel audio signal. The output ends of the frequency modulation actuators are respectively connected with an input end of a frequency synthesizer, an output end of which is connected with an input end of a power amplifier. By adopting the frequency modulation and synthesis technology, the multi-channel audio signals are respectively modulated and synthesized into FM-band frequency, then an amplifier is used for amplifying the power, and after that, the signal is transmitted out through the antennae, thereby realizing the aim that the multi-frequency FM transmitter uses a set of transmitting device to broadcast at the same speed on the same machine. Compared with the prior art, the cost of the equipment is saved, the power consumption is lowered, and space in the machine room which the equipment occupies is reduced, and a reasonable cost-effectiveness is provided.
Description
Technical field
The present invention relates to a kind of transmitter, particularly a kind of multi-frequency FM transmitter.
Background technology
Existing frequency modulated transmitter mainly by power amplifier (be called for short: power amplifier) and frequency modulation actuators (abbreviation: modulator or exciter) form.Usually, the broadcast the cover broadcast program needs a transmitter.Simultaneously, the safety of broadcasting is broadcasted the still major issue of each broadcasting station overriding concern.Therefore, all standby transmitter to be set usually for the safety broadcast.As broadcast multiple programs, then need the necessary each other interface unit of corresponding many transmitters and standby transmitter and active and standby transmitter.Thus, every increase by the one cover broadcast program in broadcasting station all must drop into a large amount of equipment funds.
Summary of the invention
The object of the present invention is to provide and a kind ofly can realize same machine, broadcast the multi-frequency FM transmitters of many cover broadcast programs simultaneously, synchronously.
Its technical scheme is: a kind of multi-frequency FM transmitter, comprise power amplifier and frequency modulation actuators and power supply, it is characterized in that: described frequency modulation actuators is a multi-section, its input respectively with the corresponding connection of output of multipath audio signal; The output of frequency modulation actuators is connected with the input of frequency synthesizer respectively, and the output of frequency synthesizer is connected with the input of power amplifier.
Its technique effect is: owing to adopt frequency modulation modulation and frequency synthesis technique, the fm band frequency is modulated, synthesized to multipath audio signal respectively, utilize a power amplifier that it is carried out power amplification again, launch simultaneously by antenna then, thereby realized the target (national standard: frequency interval 0.8MHz that multi-frequency (being less than 26 frequencies) FM broadcasting is used the same machine of a cover transmitter, broadcasted synchronously.Fm band frequency: 87-108MHz).Compared with prior art, it had both saved the cost that equipment drops into widely, had reduced power consumption again widely, had also reduced the space of hold facility machine room, had good cost performance.This multi-frequency FM transmitter equally also is applicable to non-synchronous frequency-modulating broadcast.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of multi-frequency FM transmitter comprises power amplifier and frequency modulation actuators and power supply.Frequency modulation actuators is multi-section n, its input respectively with the corresponding connection of output of multipath audio signal.Frequency modulation actuators can be adjusted according to the difference of audio input signal: i.e. and analogue audio frequency, use the analog frequency modulator driver; Digital audio is used the digital frequency modulation exciter.The modulating frequency of frequency modulation actuators can be according to concrete instructions for use, and interior selection of whole fm band of pressing frequency interval 0.8MHz, fm band frequency: 87-108MHz is provided with.The output of frequency modulation actuators is connected with the input of frequency synthesizer respectively.The frequency synthesizer audio carrier signal that multichannel is different carries out filtering by relevant low-pass filter circuit to the signal beyond its frequency, and through the overcoupled circuits coupling, mixes at last from its same output output.The output of frequency synthesizer is connected with the input of power amplifier.The output of power amplifier is connected with antenna.
In order to ensure the safety of radio program transmission, this machine also is provided with standby frequency modulation actuators, frequency synthesizer and power amplifier.Between frequency modulation actuators and the frequency synthesizer, between frequency synthesizer and the power amplifier and and power amplifier and antenna between be provided with active/standby switch respectively.
In order to realize local operation and long-range remote signalling, remote control, remote measurement and deposit that this machine also is provided with remote control unit.
Claims (2)
1. a multi-frequency FM transmitter comprises power amplifier and frequency modulation actuators and power supply, it is characterized in that: described frequency modulation actuators is a multi-section, its input respectively with the corresponding connection of output of multipath audio signal; The output of frequency modulation actuators is connected with the input of frequency synthesizer respectively, and the output of frequency synthesizer is connected with the input of power amplifier.
2. a kind of multi-frequency FM transmitter according to claim 1 is characterized in that: between frequency modulation actuators and the frequency synthesizer, between frequency synthesizer and the power amplifier and and power amplifier and antenna between be provided with active/standby switch respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101311192A CN101115041A (en) | 2007-08-21 | 2007-08-21 | Multi-frequency FM transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101311192A CN101115041A (en) | 2007-08-21 | 2007-08-21 | Multi-frequency FM transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101115041A true CN101115041A (en) | 2008-01-30 |
Family
ID=39023154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101311192A Pending CN101115041A (en) | 2007-08-21 | 2007-08-21 | Multi-frequency FM transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101115041A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835005A (en) * | 2010-04-08 | 2010-09-15 | 福建三元达通讯股份有限公司 | Liquid cooling transmitter system |
| CN114978203A (en) * | 2022-04-25 | 2022-08-30 | 南宁广播电视台 | Multi-frequency modulation transmitter |
-
2007
- 2007-08-21 CN CNA2007101311192A patent/CN101115041A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835005A (en) * | 2010-04-08 | 2010-09-15 | 福建三元达通讯股份有限公司 | Liquid cooling transmitter system |
| CN101835005B (en) * | 2010-04-08 | 2013-07-17 | 福建三元达通讯股份有限公司 | Liquid cooling transmitter system |
| CN114978203A (en) * | 2022-04-25 | 2022-08-30 | 南宁广播电视台 | Multi-frequency modulation transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080130 |