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.
Although a quote from an expert can add impact to your essay, in most cases you should try to either paraphrase or summarize the information, using citation to reference your source. Insert the quotation exactly as it was written, errors and all. Directly after a spelling error in a quote insert the word [sic].