AD9857 Interpolating mode

[sathya12]

Hi,

           I want to achieve a sine wave at the DAC output. The digital samples of the wave are generated at the host. The samples are to be transfered to the DAC.

If the AD9857 operates at QAM mode, i am getting the QAModulated sine wave. So, i need to bypass the QAM operation.

Can u suggest me to achieve this??

[AnalogKid2DigitalMan]

Well, that was easy:

Operating Mode—Register Address 01h, Bits 0, 1

00h: Selects the quadrature modulation mode of operation. 01h: Selects the single-tone Mode of operation. 02h: Selects the interpolating DAC mode of operation. 03h: Invalid entry.

-AK2DM

[sathya12]

Hi

  Thanks for the rpely.

   I had got the same information by the datasheet. But the library supports only QAM and Singletone Mode(as per the attachment of VI tree). 

Please update me how to configure the AD9857 in interpolating mode.

[AnalogKid2DigitalMan]

Not familiar with that library of vi's. Shouldn't be too hard, you have a vi for QAM, and a vi for Singletone. Open them up and figure out how to modify them and save it as Interpolating Mode. I presume it is just a bit pattern setting that has to be changed.

-AK2DM