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6-43
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
