HP-5517B是一款 6U 單插槽 VMEbus 模塊，可為我們的嵌入式 VMEbus 處理器系列提供硬盤和軟盤存選項(xiàng)。該模塊可以單獨(dú)配置一個(gè)驅(qū)動(dòng)器，也可以同時(shí)配置兩個(gè)驅(qū)動(dòng)器。閃存驅(qū)動(dòng)器可作為選件提供。VME-7452 是無(wú)源 VMEbus 板，僅連接到 P2 用戶定義的引腳、電源和接地。
HP-5517B其振幅僅取有限值的信號(hào)稱為數(shù)字信號(hào)。數(shù)字信號(hào)是離散的，它們只包含不同的值。數(shù)字信號(hào)以位的形式攜帶二進(jìn)制數(shù)據(jù)，即0或1，它在一段時(shí)間內(nèi)只能包含一個(gè)值。數(shù)字信號(hào)表示為方波或時(shí)鐘信號(hào)。最小值為0伏，而值為5伏。與模擬信號(hào)相比，數(shù)字信號(hào)較少受到噪聲的影響。數(shù)字?jǐn)?shù)據(jù)在模擬信道中的傳輸是通過(guò)種稱為調(diào)制的過(guò)程來(lái)完成的。振幅調(diào)制是使用單頻載波信號(hào)將數(shù)字?jǐn)?shù)據(jù)轉(zhuǎn)換為模擬信號(hào)的過(guò)程。類似地頻移鍵控使用恒定振幅載波信號(hào)和兩個(gè)頻率來(lái)區(qū)分1和0。

HP-5517B

The HP-5517B is a 6U single-slot VMEbus module that provides hard and floppy disk storage options for our family of embedded VMEbus processors. The module can be configured with a single drive or two drives at the same time. Flash drives are available as an option. The VME-7452 is a passive VMEbus board, connected only to P2 user-defined pins, power supply, and ground.
HP-5517B Signals whose amplitudes take only a finite value are called digital signals. Digital signals are discrete, they only contain different values. Digital signals carry binary data in the form of bits, i.e., 0 or 1, which can only contain one value at a time. The digital signal is represented as a square wave or clock signal. The minimum value is 0 volts, while the value is 5 volts. Digital signals are less affected by noise than analog signals. The transmission of digital data over analog channels is accomplished through a process called modulation. Amplitude modulation is the process of converting digital data into analog signals using a single frequency carrier signal. Similarly, frequency shift keying uses a constant amplitude carrier signal and two frequencies to distinguish between 1 and 0.

HP-5517B

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HP-5517B