"Radio, Television and Mobile Communications" Information Transmission PPT Courseware 2 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Radio, Television and M... | 9600次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Radio, Television and Mobile Communications" Information Transmission PPT Courseware 2 is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware 2, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware 2
1. Transmission and reception of radio broadcast signals
1. The transmission of radio broadcast signals is completed by radio stations
Microphone - converts acoustic signals into electrical signals
Modulator - loads an audio electrical signal onto a high frequency current
Antenna - generates electromagnetic waves to transmit high-frequency carrier signals into the air
2. The radio is responsible for receiving and restoring signals
Antenna - receives various electromagnetic waves
Tuner - selects the carrier signal of the desired station (demodulation)
Demodulation - Recovering the audio signal from the carrier signal
Speaker - converts audio electrical signals into sound
2. TV transmission and reception
1. Image signal working process
Camera - converts images into electrical signals.
Transmitter - loads an electrical signal onto a very high frequency current.
Antenna - transmits high frequency signals into the air.
2. TV receiver working process
Antenna - receives high-frequency signals containing sound and image information
Receiver - takes out and amplifies image and audio electrical signals
Display - restore image signal
Audio amplification - amplify and output weak audio electrical signals
3. Mobile phone
1. Mobile phone: (two-in-one transmitter and receiver)
A mobile phone is both a radio transmitter and a radio receiver.
Cell phones and landlines use base stations to communicate
2. cordless phone
The landline phone is connected to the local telephone network and is equivalent to a small base station.
The working area ranges from tens to hundreds of meters.
Class summary
1. The transmission of radio broadcast signals is completed by radio stations
2. Radios use electromagnetic waves to receive sound signals
3. Television uses electromagnetic waves to transmit images and sound signals.
4. A mobile phone is both a radio transmitter and a radio receiver.
5. Mobile phones (cell phones) use electromagnetic waves to transmit information
6. Landline telephones (landline phones) use changing electrical current to transmit information.
think
1. Why are the mobile numbers different?
Answer: Because the frequency of electromagnetic waves used by everyone's hands when transmitting information using their mobile phones is different.
2. Why can different channels be selected by pressing different buttons on the TV remote control?
A. Pressing different keys on the TV remote control can emit infrared electromagnetic waves of different frequencies. Just selected different channels.
Keywords: Information transmission teaching courseware, radio, television and mobile communications teaching courseware, New People's Education Edition ninth-grade physics PPT courseware, ninth-grade physics slide courseware download, information transmission PPT courseware download, radio, television and mobile communications PPT courseware download, .ppt format
For more information about the "Transmission of Information, Radio, Television and Mobile Communications" PPT courseware, please click on the "Transmission of Information ppt Radio, Television and Mobile Communications" ppt tag.
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware 3:
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware 3 1. Transmission and reception of radio broadcast signals 1. The transmission of radio broadcast signals is completed by the radio station. The microphone converts the acoustic signal into an electrical signal. The modulator loads the audio electrical signal into a high-frequency electrical signal..
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware:
"Radio, Television and Mobile Communications" Information Transmission PPT Courseware Let's think about what the image and sound signals of radio and television rely on to transmit? Electromagnetic waves are the carriers of signal transmission. How are radio broadcast signals transmitted and received? wireless..