Hello - I'm attempting to use my N210 in a somewhat unconventional application that requires a pure (real) sine wave output, with some frequency modulation around 50MHz. This signal will be used to resonate a physical device within a small band around 50MHz.
However, I'm finding when the center frequency is set to 50MHz, and I monitor the resulting waveform on an oscilloscope, I get a 50MHz tone that is slowly amplitude modulated (within a ~0.1 Hz envelope). This behavior does not occur when I set the center frequency to 0Hz, and feed in an arbitrary intermediate frequency... Unfortunately, I cannot use this technique to achieve a 50MHz output frequency due to bandwidth limitations. I suspect the LO is getting set such that there is some time-variant phase offset being introduced (rounding error?), but am unfamiliar with the internals of the device. Any tips/suggestions would be appreciated - I would like the RF output to simply resemble that of a signal generator at 50MHz. Thanks in advance, -Alex
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