2003 Polaris Deep Snow Snowmobiles Service Manual, Page 338Get this manual
ELECTRICAL 2-Pulse and Pulse Alternators
The difference between pulse and pulse alternator system is the number of AC sine waves created by the alternator in one revolution of the crankshaftFor example, on pulse system, the alternator will create pulses, or complete AC sine waves, in one crankshaft revolutionThe tachometer reads these sine waves, therefore giving you accurate RPM readingsRefer to the following text for applications