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To: KeepItSimple who wrote (67902)	7/15/1999 6:20:00 PM
From: Bill Harmond	Read Replies (2) \| Respond to of 164687

I don't care whether there's no analog any longer. They're still called modems by more people than me. Like Cisco, and Intel, and c-net. Maybe you cab send a letter to the editor. Why don't you consider your effluent advice more carefully, tell the truth, and not play electro-physics professor. news.com

To: KeepItSimple who wrote (67902)	7/15/1999 6:24:00 PM
From: dbblg	Respond to of 164687

>>There is therefore, no MODEM. True. But if you want to be scrupulous about definitions, you'll have to quit posting about the LTCM "bailout" and the negative savings rate. I guess each person revels in his/her own brand of ignorance.

To: KeepItSimple who wrote (67902)	7/15/1999 7:16:00 PM
From: Glenn D. Rudolph	Respond to of 164687

But hey, I guess when you're not technically orientated anything that is square with blinking lights is close enough to a modem, right? I thought anything that was square and had dead lights was a "KIS."

To: KeepItSimple who wrote (67902)	7/15/1999 8:08:00 PM
From: John Donahoe	Read Replies (1) \| Respond to of 164687

RE: it can modulate a digital signal into analog to send it over the audio-based circuitry that every residential phone line uses, or it can take an incoming analog signal and demodulate it into digital data your computer's serial port can read. Strictly speaking changing a signal from digital to analog and visa versa is called a "conversion". Hence the acronym DAC (Digital to Analog Converter) and ADC (Analog to Digital Converter). A classical functional definition of Modulator and Demodulator or MODEM is as follows: The signal must be "carried" by an electrical energy form, called a "carrier". The carrier must be capable of physically transmitting (carrying) the signal in the presence of noise and losses in the transmission path. The process of placing the signal onto the "carrier" is called "modulation" and the circuit that accomplishes that task is called a modulator. At the receiver end the Demodulator recovers the signal from the carrier. Standard parlance is "the signal modulates the carrier". The term "MODEM" today can take on many meanings. It's a term that is used rather loosely. I like to think of the word as describing a combination "receiver" and "transmitter" which can include all kinds of circuits. Such as modulators, demodulators, decoders, encoders, discriminators, detectors, converters, interfaces and anything else you can pile onto it. As long as its function is to place the signal onto a different (more robust) electrical energy form for the purposes of surviving transmission losses and avoiding the corrupting influence of noise. AM (Amplitude Modulation) and FM (Frequency Modulation) are just two simple means to modulate. There are many and I mean many different schemes employed to accomplish the above.