I can not understand what is "Insufficient HF data"

Discussion in 'Official REW (Room EQ Wizard) Support Forum' started by Zurab, Nov 25, 2018.

  1. Zurab

    Zurab New Member
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    Hi
    How to solve this problem?

    upload_2018-11-25_17-21-24.png
     

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  2. John Mulcahy

    John Mulcahy REW Author

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    The end frequency of your measurement is too low, try using 10 kHz.
     
  3. Zurab

    Zurab New Member
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    upload_2018-11-26_22-39-59.png I use these settings here, and I’m not calculating. Where do I need to change 10kHz
     
  4. Zurab

    Zurab New Member
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    upload_2018-11-26_23-17-2.png I changed the settings to 10kHz now there is no this message, but the equivalent volume is still not calculated
     
  5. John Mulcahy

    John Mulcahy REW Author

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    Is that after pressing Calculate parameters?

    Please post an mdat file with the measurements rather than screen shots. I also suggest using single sweeps. 7g looks like a lot of added mass for that driver by the way, the peak frequency only need to shift by 20% or so to get accurate results. High mass can cause odd behaviour.
     
  6. Zurab

    Zurab New Member
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    Here is my data
     

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  7. John Mulcahy

    John Mulcahy REW Author

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    Thanks. The mass is too high for REW to locate the peak in the added mass trace. Try with a much smaller added mass, in the meantime I'll see if I can make the peak search better able to cope with small peaks.
     
  8. Zurab

    Zurab New Member
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    I tried to measure with different loads 1g and 4g does not work
     
  9. John Mulcahy

    John Mulcahy REW Author

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    OK, thanks. I've made some modifications to the code to accommodate the low peak levels, those will be in the next beta in a week or two from now. The results with the 7g test aren't very meaningful, if you attach the 1g and 4g measurements I can run those and post the results.
     
  10. Zurab

    Zurab New Member
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    I made these measurements
    measurements with 1g could not do
     

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  11. John Mulcahy

    John Mulcahy REW Author

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    Thanks. How are you supporting the driver for the measurements?
     
  12. Zurab

    Zurab New Member
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    UR22 MkII USB
     
  13. John Mulcahy

    John Mulcahy REW Author

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    I was meaning physically, is the driver hung from a wire, mounted on something...
     
  14. Zurab

    Zurab New Member
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    YD103-12 8Om 10W
     
  15. John Mulcahy

    John Mulcahy REW Author

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    Here are the results for 3g, 5g and 7g. The 3g measurement has the best model fit so I would have more faith in those figures.

    3g.jpg 5g.jpg 7g.jpg
     

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