User's Manual

68P80801H45-1 1/20/2002 5
EBTS System Manual - Vol 2 DC Power Supply
DC Power Supply for QUAD Channel Base Radios
DC Power Supply for QUAD Channel Base Radios
QUAD Channel DC Power Supply Overview
The QUAD Channel DC Power Supply provides DC operating voltages to QUAD
Channel Base Radio FRUs. The power supply accepts input voltage sources from
41VDC to 60VDC. Input sources may be either positively or negatively grounded.
On initial startup, the supply requires a nominal 43 VDC. If the voltage drops
below 41 VDC, the QUAD Channel DC Power Supply enters quiescent mode. In
quiescent mode, the power supply emits no power.
The QUAD Channel DC Power Supply is designed for sites with an available DC
voltage source. Output voltages from the DC Power Supply are 28.6 VDC,
14.2 VDC and 3.3 VDC, with reference to output ground. The supply is rated for
575 Watts of continuous output, with up to 113˚ F (45˚ C) inlet air. At 140˚ F (60˚
C), the 28.6 VDC output reduces to 80% of maximum.
The QUAD Channel DC Power Supply consists of the Power Supply and front
panel hardware. The QUAD Channel DC Power Supply connects to the chassis
backplane through an edgecard connector. Two Torx screws on the front panel
secure the QUAD Channel DC power supply to the chassis.
Figure 2 shows the QUAD Channel Power Supply with the cover removed.
Figure 2 Quad Carrier Power Supply