Hello,
My customer has a question about ADS54J42.
[Q1]
Please tell me the proper setting for NYQUIST ZONE and CTRL NYQUIST.
<Their configuration>
* Input Frequency Range = 75MHz to 475MHz (this is narrow band signal)
* Sampling Rate = 500MSPS
<My understanding>
* CTRL NYQUIST is always 1.
* Input Frequency < 250MHz, then NYQUIST ZONE = 000
* 250MHz <= Input Frequency < 500MHz, then NYQUIST ZONE = 001
Is my understanding correct ?
[Q2]
There is no such setting in AFE54Jxx GUI.
Is this setting required ?
[Q3]
What does this change?
I understand ADS54J42 is 4 interleaving ADC.
Therefore it will produce interleaving spurs. (DC, fs/4, fs/2 at no input, fs/4 +/- input frequency, fs/2 - input frequency at signal input)
Best Regards,
Hiroshi Katsunaga
