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AD9910 Polar RAM mode - amplitude issue

Question asked by TonyB on Nov 29, 2011
Latest reply on Nov 30, 2011 by TonyB

I am setting the AD9910 into polar ram mode and loading the memory.

I get a waveform out but sending the same data results in different amplitudes.

 

Captured SPI data
00 E0 00 00 02
01 00 00 00 20
02 1D 1F C1 28

<IOUpdate>
07 00 00 00 00
09 00 00 00 00
0E 00 00 19 FA 00 00 00 03

<IOUpdate>
00 60 00 00 02

<IOUpdate>

 

16 00 00 00 00

.... RAM Data...

 

<IOUpdate>

00 E0 00 00 02

<IOUpdate>

 

Any thoughts on what might be happening?

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