MPH PYTHON III Operator's Manual page 13

The radar will stay in faster mode until the FAST button is pressed again, at which time it will
toggle slower mode. In other words, the Fastest/Slower button toggles the radar between
Faster and Slower mode when the radar is in Same Direction mode.
The range of the PYTHON III is greatly reduced in same direction mode. This makes target
identification easier by reducing the number of potential targets.
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