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Sweep tests check a unit's frequency response.  All the parameters interact and to change one parameter sometimes you have to change another first.

Lyr - When set activates that check layer.Lyr Checkbox

Start (Hz) combi boxStart (Hz) - Sets the lowest frequency that the layer will check.  It cannot be set lower than the sweep's start frequency, ie Low (Hz).  It cannot be set higher than the frequency equivalent to the number of Block points below End (Hz) (or H Lo (Hz) if it is non-zero).  If you want to move Start (Hz) higher than NWin will allow then you must first either reduce the Block points or move End (Hz) ( or H Lo (Hz) if it is non-zero), higher in frequency.

H Lo (Hz) combi boxH Lo (Hz) - If set to a non-zero value, defines the lower frequency of a "hole" in the check range where NWin does not evaluate the response.  It cannot be set lower than the frequency equivalent to the number of Block points above Start (Hz).  It cannot be set higher than the frequency equivalent to one point below H Hi (Hz).  If you want to reduce the H Lo (Hz) frequency lower than NWin will allow then you must first either move Start (Hz) lower or decrease the Block point number.  If you want to move H Lo (Hz) higher than NWin will allow then you must first move H Hi (Hz) higher.

If you set H Lo (Hz) to zero then H Hi (Hz) will also be set to zero and the hole will be removed.  If there is no hole, you can create one by setting either H Lo (Hz) or H Hi (Hz) to a non-zero value.

H Hi (Hz) combi boxH Hi (Hz) - If set to a non-zero value, defines the higher frequency of a "hole" in the check range where NWin does not evaluate the response.  It cannot be set lower than the frequency equivalent to one point above H Lo (Hz).  It cannot be set higher than the frequency equivalent to the number of Block points below End (Hz).  If you want to move H Hi (Hz) lower than NWin will allow you have to move H Lo (Hz) lower in frequency.  If you want to move H Hi (Hz) higher than NaTKiT will allow then you must first either move End (Hz) higher or reduce the Block point number.

If H Hi (Hz) is set to zero then H Lo (Hz) will also be set to zero and there will be no hole.

End (Hz) combi boxEnd (Hz) - Sets the highest frequency that the layer will check.  It cannot be set higher than the sweep's end frequency, ie High (Hz).  It cannot be set lower than the frequency equivalent to the number of Block points above Start (Hz) (or H Hi (Hz) if it is non-zero).  If you want to move End (Hz) lower than NWin will allow then you must first either reduce the Block points or move Start (Hz) (or H Hi (Hz) if it is non-zero), lower in frequency.

Block text boxBlock - Sets the number of points in the check range that will be averaged from the difference between the test unit and the reference to obtain a value in dB that will be applied to Limit (dB).  If Block is less than the number of points in a check range then a number of average values will be calculated from a rolling window across the check range.  If Block is set equal to the number of points in a check range then you will be unable to increase Start (Hz) or reduce End (Hz).  If Block is set to 1 then no averaging will occur.

Limit (dB) - The limit that determines pass or fail which can be set in the range 0.1-9.9 dB.Lim (dB) text box