It's just a signal generator, an AC voltmeter, and a phase meter, gussied up with attenuators and digital displays. They're usually VERY expensive as you want the network analyzer to be perfectly flat in amplitude and phase, which takes a lit of very precise analog electronics and tuning to do.
Two, you should always insert quotation marks at the beginning and at the end of your quote to indicate that the sentence in your paragraph is borrowed from another source. 1  Examples: 2  You may also want to read how to quote in an essay, or how to quote in APA, or how to quote in MLA.
So you need to cite every time to use material from your research. You should place a citation in any sentence in which you use words, thoughts, facts, or opinions that you learned from a source. This is true whether you use the exact words of the source or put the information into your own words.