Rev: 1.0
Hyundai Electronics Confidential Proprietary
15
4.2 Performance
Specification
4.2.1
Σψστεµ ∆ελαψ
The total round-trip delay for the voice path, including the delay in the BSC, is less than 220 ms. A suggested
delay budget for the reverse link path and the forward link path is as follows:
Table 4.2.1-1 Base Station Delay Budget
Reverse Link
Delay (ms)
Forward Link
Delay (ms)
Mobile Station
51
Mobile Station
18
Air Link
20
Air Link
20
Digital Unit
18
Digital Unit
2
Backhaul/Switching
6
CIN
8
TSB
1
TSB
1
Vocoder
3
Vocoder
49
Total
99
Total
98
4.2.2
Χαπαχιτψ
The Pico BTS is capable of physically supporting up to 32 channel elements, including all of the overhead
channels.
4.3 Electrical
Performance
4.3.1
Τρανσµιττερ ΡΦ Ποωερ
The Pico BTS shall have much less RF output power than the BTS for macro-cell. The maximum CDMA
power does not exceed
10 watts
at the antenna port on the enclosure over all temperature range.
4.3.2
Ελεχτριχ Ποωερ
4.3.2.1
Primary Power
The primary power source (or mains) for the Pico BTS is the commercial power which can be acquired very
easily. The nominal voltage may be 120VAC, 60Hz, single phase. The power subsystem in the Pico BTS is
capable of converting this commercial AC power into DC power with nominal voltage of +48V. The +48 DC
is then converted into lower voltages such as +5V, +12V, -12V, +3.3V and +7.5V to be used in each
subsystem.
The AC input ranges and the maximum power source requirement are as follows:
Table 4.3.2-1 Primary Power AC Input Voltage Range Requirement
Nominal Voltage
Voltage Range
Frequency Range
Phases
120VAC
108 to 132 VAC
54 to 66 Hz
single
220VAC
198 to 242 VAC
54 to 66Hz
single
Table 4.3.2-2 Maximum Primary Power Output Requirement
Voltage
Current
Comme nts
DC +48 V
Max 10 A
For RF power 8 watts
4.3.2.2
Battery Backup Power (Optional)
The Pico BTS shall have battery backup to cope with AC power failure. The battery shall be monitored during
normal operation, and charged if necessary. The Optional backup battery is provided with an external
compartment.
Table 4.3.2-3 Battery Power Requirement
Configuration
DC Current/Power
Comme nts
Nominal RF Power 5 watt
5 Amps/240 VA
up to 4 Hours backup
