Multipath / Signal Quality Indicator (“Q” Factor)
The bar graph on the lower left hand side of the multipath and the delay spread screens is known as the ‘Q’ factor graph. This graph uses a formula to determine the quality of the direct path and reflections of the signal by determining the ‘fatness’ of the main peak compared to the height of the direct path component.
As the direct path gets stronger and sharper, the ‘Q’ factor goes up. As the path gets weaker and fatter, the ‘Q’ factor drops, signaling a possible multipath interference concern.
Delay Spread Screen
By moving left from the multipath screen using the joystick and/or menu arrow, the user enters the delay spread screen. The left of this screen shows the same information as the mul- tipath screen. The upper right hand side of the delay spread screen shows a running total and current delay spread in nanoseconds.
The next graph below the running total graph is the cumulative delay spread graph (count vs. spread). The X axis is also in nanoseconds. The spread is cumulative and can be rest using the provided button.
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