User's Manual

Note: The power supply module has its own fan which provides independent airflow.
Figure 12: Fan Module
Function of the Power Supply
The power supply, with front-to-rear airflow, operates from either an AC or DC input and provides the DC operating
voltage for the base radio. However the power supply prioritizes an AC source (if present) over a DC source.
Figure 13: Power Supply
Note: If the power supply module is used for the Power Efficiency Package, the power supply must be
used in DC mode to obtain the 35 W standby power consumption performance.
68 | GTR 8000 Base Radio Theory of Operation
Send Feedback | November 2013 | 6871024P71-A
Applicant: Motorola Solutions
Equipment Type: ABZ89FC5810B / 109AB-5810B
Exhibit D (Permissive Change)