Hi,
Our customer is using the LMX2572LP's FSK I2S mode for FM modulation, but only when using VCO core 4 are the spurs getting louder around the carrier.
The desired modulation frequency ＆Diviation is set with the settings below, and FM modulation is performed correctly .
If FM modulation is applied to VCO cores 1, 2, 3, 5, and 6 at the carrier frequency, the spurious will not be so large.
Why does this phenomenon occur? I would appreciate it if you could tell me the solution.
Using LMX2572LPEVM & TICS Pro
[Spectrum waveform and TICS Pro settings when using Core 4]
[When using different cores]
Best regards,
Hiroshi
