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Altera_Forum's avatar
Altera_Forum
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16 years ago

Output amplitute from an NCO

Am i right in thinking that the output amplitutde from the NCO is not constant over different frequencies?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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Hi,

I have the same problem with stratix2 dsp evaluation board. I built a simple fsk modulator on NCO. The output is 10 kHz for '0' and 15khz for '1'. I use all 14 bits of DAC. The amplitudes differs about 50-100 mVolts. In the simulations everything looks ok. I also try to understand what the problem is.

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Do You Have the project to share?