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Original question:

DS90UB935-Q1: TI954-TI935 with 935 AON mode

DS90UB935-Q1: UB935 E RE in EMC testing

John Will
Prodigy 20 points
Part Number: DS90UB935-Q1


Hi TI colleague,

We used ub935 internal always on clock mode(AON mode),the RE testing excessive.

The excessive frequencies are concentrated at 5260/5300 Hz.

How can we optimize through register configuration or hardware?

We need help.

  • 0
    TI__Mastermind 25595 points

    Hi John,

    Thanks for sharing your results here. Would you be able to share the layout and schematic being used for this project? The DS90UB953 in Asynchronous internal AON mode will already have an SSC profile by default so we would not have any register configurations to provide here. From a theoretical perspective, I wouldn't expect to see peaks in these areas. Would you be able to elaborate on your test set-up for this measurement? For this test we would generally want to see the 954 and 953 brought up with stable lock prior to collecting emissions results. 

    Best,

    Zoe