開發(fā)工具和工具包簡化RF設(shè)計(jì)

　　雖然專有通信硬件和協(xié)議可以為自定義或安全應(yīng)用程序定義，但大多數(shù)設(shè)計(jì)工程師都使用硬件塊來實(shí)現(xiàn)標(biāo)準(zhǔn)或協(xié)議。沒有什么比通信鏈接更真實(shí)的了。

　　在早期，鏈接如RS-485、RS-232、和iee-488易于理解和代碼。簡化的OSI模型意味著設(shè)計(jì)可以由一個工程師從地面上鍛造出來。看看USB、TCP/IP、以太網(wǎng)和以太網(wǎng)供電（POE）所帶來的復(fù)雜性，您可以看到，一度簡單的解決方案現(xiàn)在是團(tuán)隊(duì)的努力。

　　為了滿足當(dāng)前的時間到市場的限制，設(shè)計(jì)工程師需要更高層次的構(gòu)建塊和全面的開發(fā)工具。所選擇的固件和硬件需要進(jìn)行集成、測試、監(jiān)視、特性、認(rèn)證和批準(zhǔn)。硬件和軟件工程師需要協(xié)同工作，而開發(fā)工具常常是它們在一起的地方。

　　Black boxes

　　In the digital domain， the engineer usually can turn to his or her intuition or “hands on feel” to grasp how any part in a given design operates. We may not be able to design a better multiplier than the one in the processor we specify， but at least we understand what the multiplier is doing， how it works， and how to use it.

　　With analog， this becomes more abstract. While we may be knowledgeable about the function and use of an op amp， in all probability a relatively small percentage of us can say that they understand the intricacies and nuances of the well-designed op amp.