[Discuss-gnuradio] Set Frequency from C++ Block

[Lee Patton]

I would like to transmit a stepped-frequency pulse train.

e.g.,
pulse 1 @ freq0, pulse 2 @ freq0+df, pulse 3 @ freq0+2*df, etc.. 

What makes this hard is that I need to set the vco frequency from within
a C++ block.  Is there an example of this anywhere?  If not, any hints?

I would guess this is daughter card specific. So, if it helps, I'm using
the Flex-... oops, excuse me ... RFX-2400.

Thanks,
 - Lee