using fmcomms1, i send a QPSK signal (10 Mbps datarate) sampling the DAC @400 MHz, TX PLL @2.5GHz
on the spectrum screen, 1st marker Tx QPSK output data
2nd and 3rd marker shows unwanted signal at the 200 Mhz letf and right side.
Changing the dac9122 register both I/Q Scale, Phase, DC offset does not affect the difference between carrier and sideband signal
How can i decrease this two unwanted signal?
Thanks for your advise.