![]() This becomes obvious when zooming in as can be seen in the third measurement. ![]() Basically the same picture and no compression underpinning the huge dynamic range of the SA612 and the ADC.īut what is causing the "noise" hump under the two peaks? With a 0dBm test signal you get the second measurement. When removing the test signal the noise floor is flat at -90dB, excellent clean signal! If you increase the sampling rate the hump widens proportionally The 48kHz is related to the sampling rate of the ADC. You see the double peak,each about 2kHz wide, caused by the mixing with CLK2 and the single frequency FFT at +/-5kHz on top of the noise like hump of about 48kHz wide. ![]() If you ignore the phase any signal presented at port 2 should be mixed with the CLK2 and create some response.Īs a test I applied a 10MHz -50dBm signal.
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