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ADC12D1800RF delay between channels

cleconte
Prodigy 210 points
Other Parts Discussed in Thread: ADC12D1800RF, ADC12D1800

Hello,

We are cyrrently using the ADC12D1800RF, and we would like to compare the data received on I channel and Q channel.

Our problem is, we observe a delay betwwsen the two channles, and have no explanation for this.

When setting two synchronized 500MHz sinewaves on I channel and Q channel, we obtain a 4 samples decay between the two channels on Wavevision.

If we decrease the sinewaves frequency, this decay is increased. Yesterday, we set a white noise on I channel and Q channel, and observed 184 samples decay.

We have checked same signals on an oscilloscope, and signals were synchronized. Does  anyone  have any explanation for this?

Thanks in advance for your answer,

Regards,