[Discuss-gnuradio] A Chunks to Symbols Related Question

[Domenic Magazu III]

All,

     In creating an application that requires Pulse Position Modulation we generated a GRC file using the chunks to symbols block.  Everything worked perfectly except in small areas where we need the amplitude to remain unchanged (~ at zero).  1s are mapped to 10 and 0's are mapped to 01.  Does anybody have input or ideas on how to create 'space' for lack of a better word between 1's and 0's at desired points. 

 

Example 1010_____0101_______

 

Amplitude increase at 0 seconds for 10 and increase at 1 microsecond for the second 10.  Then there should be a gap in amplitude change and continue with amplitude change for 01 01...so on and so on.

 

Thank you

Domenic