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AD9914 unable to programme, Sync clock swing

Question asked by muttu on Jul 14, 2016
Latest reply on Mar 6, 2017 by muttu

hi

we are unable to programme DDS in either modes (parallel, direct, serial modes). All the regulators are ok with enough current capability (tested with external drive). DAC reset resistor , DAC Bypass capacitor correctly assembled. we are feeding in 3 GHz, and sync clock is coming @ 125 MHz (1/24) BUT the level of swing in oscilloscope is 600 mv to 1.8 v. can anybody help us. help is urgently needed.

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