Codan Radio P25 Training Guide - Manual (Page 18)

TRAINING GUIDE | P25 RADIO SYSTEMS
Chapter 1: Introduction To P25 Page 10
Spectrum Effi ciency
P25 maximizes spectrum effi ciency by narrowing bandwidths.
Figure 1-6: P25 Spectrum Effi ciency
The RF spectrum is a fi nite resource used by every country in the world. Spectrum effi ciency frees up
more channels for radio system use.
P25 Phase 2 (TDMA)
12.5 KHz (2 time slots)
6.25 KHz (effective bandwidth)
H-CPM and
H-DQPSK
Analog Systems
25 KHz
P25 Phase 1
12.5 KHz
FM C4FM