User's Manual

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D-620003-0-20 Rev J CONFIDENTIAL
Connecting a Main Hub to a Base Station
6.6.3.2 Using the Uplink ALC Setting
Uplink automatic level control (UL ALC) circuitry within the RAU provides auto-
matic level control on high-power signals in the uplink path. This functionality is
required to prevent RF signal compression caused by a single or multiple wireless
devices that are in very close proximity to an RAU. Compression causes signal degra-
dation and, ultimately, bit errors, and should be prevented. Two settings are available
to optimize UL ALC performance:
• Single Operator and Protocol: Use when only one operator and protocol is
on-the-air within the Unison system’s configured and adjacent frequency bands
(rarely used).
• Multiple Operators: Use when more than one operator and/or protocol is present
in the Unison system’s frequency or adjacent frequency bands (almost always
used).
Table 6-31 shows the frequency bands that are adjacent to the bands of which the sys-
tem is configured.
Table 6-31 Frequency Bands Adjacent to System Configured Bands
System
Configuration Adjacent Bands
iDEN Cellular
Cellular iDEN
PCS ADB PCS E
PCS DBEF PCS A, PCS C
PCS EFC PCS B
PCS A4, A5, D, B, E F
PCS A5, D, B, E, F C
PCS D, B, E, F, C2 A
PCS B4, B5, E, F, C A
1
DCS 1 DCS 2, DCS 4
DCS 2 DCS 1, DCS 4
DCS4 DCS 1, DCS 2
UMTS 1 UMTS 2, UMTS 3
UMTS 2 UMTS 1, UMTS 3
UMTS 3 UMTS 1, UMTS 2
AWS1 AWS2
AWS2 AWS1