Spider DSA User’s Manual
286
Up Down – data is only acquired when RPM starts below low RPM limit
and increasing. Acquisition continues as RPM increases past high RPM
limit and then as RPM decreases past the low RPM limit.
Down Up – data is only acquired when RPM starts above high RPM limit
and decreasing. Acquisition continues as RPM decreases past low RPM
limit and then as RPM increases past the high RPM limit.
Pulse Detection Resolution is a hysteresis value applied to the trigger
transition voltage. If a rising edge is specified, a low state must be at least the
pulse detection resolution below the pulse edge value. If a falling edge trigger is
specified, this constraint applies to the pre-trigger high state.
Gear Rate is the ratio between two gears.
The same settings are also applicable for the Tachometer 2, if enabled.
Order Analysis Parameters Setup
To setup the Order Analysis parameters, click on the “Config” button on the
Control panel or navigate to “Test Configuration” from the “Setup” menu item.
This will open the same page which is used for the tachometer setup.
The left side consists of two important sections for settings, the upper one is the
Order Analysis parameters setup and the lower one is the FFT Analysis
parameters setup.
In this section, we will discuss the Order Analysis parameters setup. These
parameters are used for calculating the Order Spectrum, Order Tracks and Band
RMS Spectrum.
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