Re: [Discuss-gnuradio] How to hold a values from file source

[Josh Blum]

On 10/26/2010 10:17 PM, songsong gee wrote:
> Currently I am trying to make an ASK (Amplitude Shift Keying)
>
> I use GNURadio Companion,
>
> The program gets the input from file source and multiplies it with signal
> source.
>
> And I monitors via Scope and FFT plots
>
> You can see a diagram ASK.grc (image)<http://goo.gl/0WHt>
>
> And the result is somewhat weird. Plots (image)<http://goo.gl/UcF9>
>
> It seems sinusoidal, but the shape looks like sawtooth!

You are multiplying random 1s and 0s by a sinusoid. And you have a 
sinusoid that is randomly either 0 or sine(x). It looks correct!

Perhaps you want to increase the temporal width of your symbols? In that 
case, I suggest using the repeat block.

_josh