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7-25
D-620003-0-20 Rev J
CONFIDENTIAL
Unison Component Installation Procedures
link intermodulation products may fall within the 800 Cellular uplink band. In addi-
tion, 800 iDEN downlink signals near the lower edge of the band at 851 MHz may
cause the 800 Cellular uplink automatic level control (ALC) circuitry in the RAU to
engage and thereby reduce uplink gain.
To prevent either of these conditions, use the following guidelines:
• In-band 800 iDEN intermodulation products < -90dBm
• Lower frequency 800 iDEN signals < –30dBm for Unison
Given a typical DAS configuration (4 iDEN carriers, omni-directional antennas, line
of sight), these guidelines translate to an antenna spacing (d1) of 6–9 meters for Uni-
son.
800 MHz Cellular Downlink & 900 MHz iDEN Uplink
A 2 MHz frequency gap (896 – 894 MHz) separates the 800 Cellular downlink and
900 iDEN uplink frequency bands. Because of this narrow spacing, 800 Cellular
downlink intermodulation products may fall within the 900 iDEN uplink band. In
addition, 800 Cellular downlink signals near the upper edge of the band at 894 MHz
may cause the 900 iDEN uplink ALC to engage and thereby reduce uplink gain.
To prevent either of these conditions, use the following guidelines:
• In-band 800 Cellular intermodulation products < -90dBm
• Upper frequency 800 Cellular signals < –30dBm for Unison
Given a typical DAS configuration (6 CDMA carriers for Unison, omni-directional
antennas, line of sight), these guidelines translate to an antenna spacing (d2) of 8-14
meters for Unison.
Connecting the Antenna to the RAU
Connect a passive antenna to the SMA male connector on the RAU using coaxial
cable with the least amount of loss possible.
CAUTION:
Firmly
hand-tighten the SMA female connector –
DO NOT over-tighten the connector.
Connecting the ScTP Cable
Consideration:
• Verify that the cable has been tested and the test results are recorded.
To connect the ScTP cable:
• Connect the cable to the RJ-45 female port on the RAU.
