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ADF4159 Phase Coherence Between the chirp

Thread Summary

The user is seeking phase coherence between consecutive ramps using a single ADF4159 PLL in sawtooth burst mode. The support engineer explains that due to the fractional N sigma delta modulator (SDM), achieving phase coherence is difficult and may be impossible without external phase measurement and manual adjustment using the phase adjust controls.
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Hello,

We are using ADF4159 for ramp generation and we require phase coherence between the ramps. means phase of start freq of ramp should be phased matched with next ramp start frequency phase.

Kindly help me to make this with ADF4159 PLL.

Regards

Sushant