On 05/01/2010 06:48 PM, William Pretty Security Inc wrote:
Two Questions:



1)      GRC comes with a slider but no command button (like the one with
usrp_probe). Is there an easy way to add one to GRC ?


The variable chooser implements a button.

Do I have to add one afterward using a python editor ??



As a general rule, do not edit a generated file. You can always create custom python modules or blocks and import them into grc.


        2)     Is there any way to implement a timer event with GRC ?  I want
to step the "frequency" variable in USRP Source and the "baseband frequency"
variable in

                 FFT Sink at say two second intervals to simulate a scanner .



   Or is there a better way to d number 2 ???



I would use the signal source to generate a triangle wave, and connect that to a variable sink. Where the variable controls the frequency of the usrp source.

-Josh


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