3BSE018405R1 TC513AF100 | IC200GBI001 | 數(shù)字信號|
3BSE018405R1 TC513AF100調(diào)制解調(diào)器是是一種能夠?qū)崿F(xiàn)通信所需的調(diào)制和解調(diào)功能的電子設(shè)備。
一般由調(diào)制器和解調(diào)器組成。在發(fā)送端，將計(jì)算機(jī)串行口產(chǎn)生的數(shù)字信號調(diào)制成可以通過電話線傳輸?shù)哪M信號；在接收端，調(diào)制解調(diào)器把輸入計(jì)算機(jī)的模擬信號轉(zhuǎn)換成相應(yīng)的數(shù)字信號，送入計(jì)算機(jī)接口。
在個人計(jì)算機(jī)中，調(diào)制解調(diào)器常被用來與別的計(jì)算機(jī)交換數(shù)據(jù)和程序，以及訪問聯(lián)機(jī)信息服務(wù)程序等
3BSE018405R1 TC513AF100調(diào)制就是用基帶脈沖對載波波形某個參數(shù)進(jìn)行控制，形成適合于線路傳送的信號。
解調(diào)就是當(dāng)已調(diào)制信號到達(dá)接收端時(shí)，將經(jīng)過調(diào)制器變換過的模擬信號去掉載波恢復(fù)成原來的基帶數(shù)字信號。采用調(diào)制解調(diào)器也可以把音頻信號轉(zhuǎn)換成較高頻率的信號和把較高頻率的信號轉(zhuǎn)換成音頻信號。
所以調(diào)制的另一目的是便于線路復(fù)用，以便提高線路利用率。
基于載波信號的三個主要參數(shù)，可以把調(diào)制方式分為三種：調(diào)幅、調(diào)頻和調(diào)相。分類方法播報(bào)編輯外置式Modem外置式Modem放置于機(jī)箱外，通過串行通訊口與主機(jī)連接。
這種Modem方便靈巧、易于安裝，閃爍的指示燈便于監(jiān)視Modem的工作狀況。但外置式Modem需要使用額外的電源與電纜。
內(nèi)置式Modem內(nèi)置式調(diào)制解調(diào)器(5張)內(nèi)置式Modem在安裝時(shí)需要拆開機(jī)箱，并且要對終端和COM口進(jìn)行設(shè)置，安裝較為繁瑣。
這種Modem要占用主板上的擴(kuò)展槽，但無需額外的電源與電纜，且價(jià)格比外置式Modem要便宜一些。
The 3BSE018405R1 TC513AF100 modem is an electronic device capable of achieving the modulation and demodulation functions required for communication.
It is generally composed of a modulator and a demodulator. At the sending end,
the digital signal generated by the serial port of the computer is modulated into an analog signal that can be transmitted through the telephone line.
At the receiving end, the modem converts the analog signal input to the computer into the corresponding digital signal and sends it to the computer interface.
In personal computers, modems are often used to exchange data and programs with other computers, and to access online information service programs
3BSE018405R1 TC513AF100 modulation is to use baseband pulse to control a certain parameter of the carrier waveform to form a signal suitable for line transmission.
Demodulation is when the modulated signal reaches the receiving end, the analog signal transformed by the modulator is restored to the original baseband digital signal by removing the carrier.
The use of modems can also convert audio signals into higher frequency signals and convert higher frequency signals into audio signals. Therefore, another purpose of modulation is to facilitate line multiplexing in order to improve line utilization.
Based on the three main parameters of the carrier signal, the modulation mode can be divided into three types: amplitude modulation,
frequency modulation and phase modulation.
Category Method Broadcast Editing External Modem The external Modem is placed outside the chassis and connected to the host through a serial communication port.
The Modem is convenient and easy to install. The blinking indicator helps to monitor the working status of the Modem. However,
an external Modem requires additional power supplies and cables. Internal Modem Internal Modem (5 pieces) The internal modem needs to be removed from the chassis and set the terminal and COM port,
which is complicated to install. This Modem occupies the expansion slot on the motherboard, but does not require additional power supplies and cables, and the price is cheaper than an external Modem.
