Undocumented SBX behavior

Dear Sir,

I run this command with SBX daughterboard on N210:

/usr/local/lib/uhd/examples/tx_waveforms --freq 500e6 --wave-type
SINE
–wave-freq 5e3 --rate 10e6

What is performed at the SBX, does it multiply (Frequency Modulation)
the
5kHz SINE wave with the 500MHz carrier frequency …?

Thanks.
Regards,
[email protected]