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LO setting issue

Category: Hardware
Product Number: ADRV9026

 Hi! There is an issue with setting the LO frequency on my ADRV9026 evaluation board with the ZCU102 (ZYNQ Ultrascale+) platform.

Description of the Problem:
I am using the TES  to configure the system. I set the LO frequencies as follows:

  • LO1 = 875.5 MHz

  • LO2 = 1842.5 MHz

However, when I start the transmission and observe the output signal on a spectrum analyzer, I do not see a clean carrier at the expected frequency. Instead, the output spectrum is highly corrupted.

Observed Behavior on Spectrum Analyzer:

  • The output contains multiple spurious signals at frequencies that are multiples of the configured LO.

  • Harmonics I don't need appears to have the highest power.

  • The signal I need has the lowest power.

Edit Notes

Lo freq correction
[edited by: StephaniusNicetElius at 7:46 AM (GMT -4) on 23 Oct 2025]

Thread Notes

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