DBS3900 V300R008
Product Description
Issue 04 (2008-06-11)
Commercial in Confidence
Page 34 of 46
7.6 Power Supply
7.6.1 Power Input of the BBU
Table 7-6 lists the power input for the BBU.
Table 7-6
Power input for the BBU
Power Type
Nominal Value
Allowed Range
–48 V DC
–48 V DC
–38.4 V DC to –57 V DC
+24 V DC
+24 V DC
+19 V DC to +29 V DC
220 V AC
220 V AC
176 V AC to 280 V AC
Two types of BBU3900 are available in terms of power supply: -48V DC and +24V DC.
With a matched power conversion system, the 220 V AC power can be converted into –48 V DC
power for the use of the BBU.
7.6.2 Power Input of the RRU
Table 7-7 lists the power input for the RRU.
Table 7-7
Power input for the RRU
Power Type
Nominal Value
Allowed Range
–48 V DC
–48 V DC
–36 V DC to –57 V DC
220 V AC
220 V AC
176 V AC to 280 V AC
With a matched power conversion system, the 220 V AC power can be converted into –48 V DC
power for the use of the RRU.
7.7 Power Consumption
Table 7-8 lists the total power consumption of DBS3900 in typical configuration on
the site.
Table 7-8
Total power consumption of DBS3900 (RRU3004 configured)
Site Configuration
TOC (W)
Work Mode
Typical Power
Consumption (W)
S2/2/2 (900M)
30
No combiner
560
S4/4/4 (900M)
15
Combiner
740
S4/4/4(1800M)
10W
Combiner
730
