IQ modulation (problem with random source)

[louloulou]

Hello,

I try to study IQ modulation, so I try to simulate this modulation under gnuradio but I have some issues using the Random source to generate my binary data. I try to control the data rate coming from a random source but I don’t understand how to do that. here is a print screen of what I have.

Thank you,

[louloulou]

I used the block “Repeat” to slow down the generation of the bit. Here is how I solve the problem.