User's Manual

800MHz Tetra Repeater
User Handbook
Handbook Nō.-55-151501HBK Issue No:-A
Date:-22/04/2005
Page:-
24 of 31
4.8 15V Switch-Mode PSU (96-300054)
4.8.1 Description
The power supply unit is a switched-mode type capable of supplying 15V DC at 27Amps
continuously. The amplifiers in this unit will draw approximately 17-18Amps at 12V DC,
so the PSU will be used conservatively ensuring a long operational lifetime.
No routine maintenance of the PSU is required. If a fault is suspected, then the output
voltage from the power supply may be measured on its output terminals. This is typically
set to 12.2V. The adjustment potentiometer will be found close to the DC output
terminals.
All the PSU’s used in AFL Cell Enhancers are capable of operation from either 110 or
220V nominal AC supplies. The line voltage is sensed automatically, so no adjustment or
link setting is needed by the operator.
4.8.2 Technical Specification
AC Input Supply:
110 or 220V nominal
Voltage:
90 to 132 or 180 to 264V
(absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
15V DC (nominal)
Voltage:
12.5-17V (absolute limits)
Current: 27.0A