Dave's ESL Cafe's Student Discussion Forums

[Joseph@Shiga]

Hi Lotus-san or other guys

Would you kindly advice me how to correctly explain the following situation, in consideration of the coincidence of the numbers.
(conditions)
A device A has a plurality of outputs.
A device B has a plurality of inputs.
A device C has a plurality of outputs.

(My trial sentence)
The outputs of the device A are inputted to the respective inputs of device B; then, the device B modulates the inputted outputs from the device A with the respective outputs of the device C.

thanks a lot in advance
Joseph@Shiga, Japan

[asterix]

Device B modulates input from Devices A and C.

It's not clear from your three set up sentences that B can modulate, though.

[lotus]

Hi Joseph,

Try:

Device A has multiple outputs.
Device B has multiple inputs.
Device C has multiple outputs.

The outputs of device A goes to the respective inputs of device B. Device B modulates the respective inputs from the outputs of device A and device C.

Modulation is a technique used for encoding and transmitting electronic communications information. The two most common analog modulation techniques are AM (amplitude modulation) and FM (frequency modulation). These correspond to the AM and FM bands in your radio. In both techniques, a reference oscillating frequency is employed. This is most likely device C. Device B is the modulator. Device A is the audio input.

In amplitude modulation (AM), the reference frequency is the carrier signal. It does not change. Only the amplitude changes, hence AM (amplitude modulation).

In frequency modulation (FM), the audio signal modulates (changes) the frequency rate change of an oscillator. The amplitude stays the same, but the frequency rate changes, hence FM (frequency modulation). Because the amplitude doesn't change, FM is more immune (less susceptible) to noise. But, because it is transmitted at higher frequencies (for better fidelity), it doesn't travel as far as AM. AM can actually bounce off the atmosphere and travel halfway around the world.

This site has a good discussion on modulation and electronics in general.
http://williamson-labs.com/home.htm

AM (amplitude modulation)
http://williamson-labs.com/480_am.htm#top

FM (frequency modulation)
http://williamson-labs.com/480_fm.htm#top

Modulation is a technique used to transform (code) and transmit intelligent information to a receiver (which uses inverse technology to de-modulate) on the other end. Your telephone and computer modem (MOdulate-DEModulate) uses this technique to transmit and receive voice and data.

Modern techniques for transmitting digital information employ digital modulation. Though more complex, it works on the same principle.


--lotus
_________________
War does not make one great --Yoda

[Joseph@Shiga]

Hi Lotus-san

Thanks again for your meticulous care (detailed explanation).
(Sorry not to have told you earlier, but I myself is experienced engineer
who specialized in electronics, especially communication technology,
audio-visual technology, and so on.) I just wanted to confirm if there
is any discrepancy in my trial sentence, in terms of coincidence of the numbers of inputs or outputs. However, I believe I could study about
"modulation".

Let me ask one more question.
I guess from my expertise that, in your sentence, the underlined part may be "with (or by) corresponding inputs from the device C".

(your sentence)
The outputs of device A goes to the respective inputs of device B. Device B modulates the respective inputs from the outputs of device A and device C.

sorry to trouble you.
Joseph@Shiga.

[lotus]

Hi Joseph,

Yes. You can use "with", but not "by."

The outputs of device A goes to the respective inputs of device B. Device B modulates the respective inputs from the outputs of device A with corresponding inputs from device C.

In technical writing, when a component or device is specified by name or designation, we do not generally use the articles "a" or "the" in front of it.


--lotus
_________________
War does not make one great --Yoda