ADRV9002+ZC706 GUI cannot setting LPF -3dB corner frequency of AFE

Hi,

My GUI version is 0.15.0

I have some questions about setting LPF -3dB corner frequency of Tx and Rx of AFE in the GUI. Whatever I set any mode such as TDD or FDD LTE, the -3dB corner frequency of Low pass filter is always 50MHz and 40MHz. Could I able to set that by myself.

Please give me a hand,I am really appreciated it.

Best Regards,

Peter

  • +1
    •  Analog Employees 
    on Jun 9, 2021 9:30 AM

    Hello Peter,

    The LPF in the AFE of the ADRV9001 devices is mostly not within the customer's control, this filter is controlled solely by our API's in accordance with your application. There are some bits you can control of the Rx filters, but only at a very high level. Below is a screenshot from TES of where you can adjust the Rx Analog Filter settings:

    If you need finer control on the filtering operation of the device you can also use the 128-tap PFIR in the DFE of either Rx or Tx, as shown in this image:

    We also have a written guide on programming this PFIR, available at this link: https://ez.analog.com/wide-band-rf-transceivers/tes-gui-software-support-adrv9001-adrv9007/w/documents/15492/loading-rx-pfir-coefficients

    I do hope this helps! As a side note I'd also recommend updating your TES software, just last week we release TES v0.16, which is what I'm showing in the images provided.

    Best Regards,
    Oisín.

  • Hi,Oisin

    Thanks for your reply.

    I only set up either Rx or Tx bandwidth of LPF by using the 128-tap PFIR in the DFE,do I?

    However, I wanna know some issues:

    1.There are two LPF in the AFE,the one is in Tx part and the other one is in Rx part,I don't see any information in the ADRV9002 datasheet or users guide about there power consumption, datasheet and users guide only describes three type of power consumption but the difference between these functions are not written.Is it only the difference in power consumption? Or are there other functions?

    2.What are difference between version 0.16.0 and 0.15.0 of TES

    I am really appreciated it.

    Best Regards,
    Peter

  • 0
    •  Analog Employees 
    on Jun 10, 2021 12:28 PM in reply to OWatkins

    Hi Peter,

    Largely yes, the analog filters don't normally do very much in terms of filtering, our IC is designed to handle a lot of noise and interferes in the analog domain, leaving the bulk of the filtering and signal processing to the Digital Front End.

    I'm confirming now if we have measurements taken on the power consumption of the LPFs specifically. If you wanted you could take a fairly rough measurement yourself using TES. Program the part and use the Power Monitoring window (found under the View menu button) to monitor the power consumption of each power domain. Export this data, reset the part and then try a different LPF power setting. Reprogram the part and view the Power Monitoring window again. This should provide insight to which power domain the LPFs draw power from and roughly how much the power they need in each setting.

    TES v0.16 is just our latest release, meaning there's a fair few bugs fixed and a suite of new features added, such as support of control of GPIO pins from the Auto TDD state machine, much easier access to the Demo Mode, and more besides. Unlike previous releases this version does not support the pre-release Silicon, meaning if you are using B0 silicon this release of TES will not work for you. If you're using released Silicon then we do suggest adopting this latest version.

    Let me know if there's more I can help with!

    Best Regards,
    Oisín.

  • 0
    •  Analog Employees 
    on Jun 10, 2021 1:43 PM in reply to OWatkins

    Hi again Peter,

    One of our apps engineers confirmed that this was indeed how he measured the power consumption of the Rx Analog LPF, here are the measurements:

    First order Rx LPF:

            Low -> Medium: power consumption increases about 14mW

            Medium -> High :   power consumption increases about 25mW

            Low - > High:    power consumption increases about 39mW

    First order LPF- Low   - > Second Order LPF-low, power consumption increases about 75mW

    Best Regards,
    Oisín.