appropriate carrier frequency for Modulation

Read your textbook more carefully ?>:-} ...Jim Thompson

On Wed, 12 Aug 2015 09:01:37 -0700, Jim Thompson Gave us:

Look how JT gives really good, helpful answers... NOT!

If you look at the article header, a reverse DNS lookup of the

On Wed, 12 Aug 2015 09:14:01 -0700, Jeff Liebermann Gave us:

JT needs to be interred.

Please do not post a separate thread into another group. I found a post with essentially the same contents in sci.electronics.design.

If your signal is an analog real signal with a bandwidth of 150 kHz, it will not fit into a channel of 100 kHz width.

If the signal is a bit stream, please say so.

The carrier frequency should be high enough so that no significant sideband energy goes at or below zero frequency. The design of your transmission channel can have a more stringent lower frequency limit.

You really have to check trough your frequency plan, especially look for the fundamental frequencies and their harmonics and especially the sum and differences of the fundamentals and harmonics. Make sure none hits your intended frequency range.

Of course, the same applies for reception, but you may need much better attenuation to keep unwanted frequencies away from your receiver passband.

JT has the correct answer, unlike your non-answer.

On Wed, 12 Aug 2015 15:08:39 -0400, "Tom Miller" Gave us:

Whatever you say, TommyTard.

BPSK suggests that you have digitized the signal, so the number of bits and the sampling rate need to be specified.

DecadentLoser always has to throw his mouth into everything. ...Jim Thompson

it depends what you want to do with the modulated signal.

bandpass propertis of the medium.

yeah if it was lower you'd get aliasing. Higher by enough that you can filter out unwanted sidebands caused by modulator imperfections.

understand the properties of the mudoulator and the medium

I don't think it's going to fit. modulation typically perserves, or increases band-width. 100kHz is smaller than 150kHz

And you killfile me but not him ? Does not sound logical.

Then throws his foot into his mouth. If only he'd swallow then maybe he'd disappear.

It's not his head, nor his mouth.

On Tue, 18 Aug 2015 20:11:34 -0400, krw Gave us:

You demonstrate that you are even more retarded than they are, but you do that every time you show up in the group.