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9.1.4 Power Control Efficiency
The results are presented in terms of Capacity Factor, which is a ratio of voice call
power to full power. Capacity Factor is calculated by determining the amount of time
spent at various power levels during uplink and downlink.
Figure 10
- Capacity Factor
9.2 Automotive Electrical Transients
The STS.01 is designed to maintain at least Class C operation for all transients defined
in ISO 16750-2, ISO 7637-2, and ISO 7637-3. Class C operation means the device
functionality will return to normal after the transient event without user intervention.
The STS.01 actually maintains Class A operation for many of the transients including
the load dump transient, defined in ISO 16750-2, Section 4.6.4, complying with the
most severe 24V system requirements. Class A operation means the device functions
as designed without interruption and without user intervention during the transient
event. Other similar devices incorporate a user-replaceable fuse to overcome the
severe load dump transient. This allows the manufacturer to claim Class D operation,
meaning the user has to remove the device from its mounting location, open it up,
