The Scale Parameters dialog consists of two principal groups of controls: Horizontal and Vertical Scales. 

This powerful dialog enables plotting of curve data in almost any possible manner.  A different scale is defined for each type of curve units. 

The horizontal panel provides control over the frequency, time, or angle unit scales.  The vertical panel controls a wide variety of different types of unit scales.

Scale labels can be automatically generated bythe system, or modified by the user for special applications.

This utility is very useful for manually constructing polar plot data, from a group of normal frequency response measurements.

Each frequency response curve is taken at a different location radially around the transducer.

Using this dialog the representative locations of each curve are entered, and then an output list of curves is established with specific frequencies for which the polar curves will be generated.

A series of ground plane measurements were made by rotating the mic by 7.5 Degree increments through the entire 360 Degree circle. This resulted in 48 frequency response curves measured across 10Hz-40kHz.

The curves were then normalized to the on-axis 0 Degree curve. This was accomplished by dividing all curves by the 0 Degree curve. In this way the response at each location around the transducer is relative to the on-axis response.

It was desired to produce 5 polar curves for the higher frequencies of 2kHz, 5kHz, 10kHz, 20kHz, and 40kHz.

The graph plotting system automatically calculates the beamwidth in degrees, Q factor, and the directivity index DI for each of the polar curves.