Noise problem in multi band fm transmission

hello,
First of all my apologies to sorry,I did not guess the behaviour of the
tool.I am posting a new message .
I have modified the fmradio.py and fm_tx4.py code to transmit multiband
fm
transmitter
As I increase the number of channels,the noise in the signal is
increasing.
Can u suggest me how to reduce the noise in the signal.

Regards,
Mayur

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