When a test is running and the red and green dots placing the mouse cursor over a red dot will indicate the number of lines outside the spectrum. If the overall test spectrum is i.e. 20-2000Hz and a the notch settings are a small slice of that test spectrum how then are the number of abort lines determined for the notch and how is an abort event triggered? Hope this is clear. thx.
For a Random Control test, part of the test setup is in defining the reference spectrum to which the control channel response, (average for more than 1 control) will be controlled to. An integral part of this definition includes the alarm and abort levels. This same type of spectrum with alarms and aborts can also be defined on a response channel basis. In this case for random control they are referred to as “Limit Channels”. (For sine control this is referred to as “Notching”, and the notch spectrum is defined with alarms and aborts, so a bit of terminology difference.) In the Random Control test setup, one of the safety parameters is the “Maximum abort lines”. When a limit channel is in a limiting condition, then it is considered the Control channel in that spectral region of control, and any spectral lines that are above or below the abort level specified for that channel will contribute towards the total number of “Max abort lines”. Outside of that limit region, then the control channel is checked for an abort condition, and if there are spectral lines exceeding the abort levels, then they also contribute towards the total number of “Max abort lines”. If the sum of these abort lines for both limit and control channels do exceed the max, then in that case the test will abort. Note that these abort conditions are checked only when the test level reaches a dB level relative to the full level to avoid the abort lines due to noise. This dB level is set in the safety parameters of the test setup and is called “Abort check enable level”. There is also a corresponding parameter for “Limit abort check enable level”.