User's Manual

Chapter 2 Planning a CCU/Repeater Installation
14 CCU 100 and Repeater 100 Installation Guide
Proprietary and Confidential
Remote Mount High Gain (8.15 dBi) 900 MHz Antenna on a Tower
CCU
The table below lists several options for coaxial cable that can be used with the remote
mount high gain 900 MHz antenna. when installing the high gain antenna on a Tower
CCU the FCC has set limits to the maximum transmit power of the CCU. In order to meet
these limits, Tower CCUs with FCC ID number EO9CCU100T must have a minimum of
2.2 dB worth of loss (but not more than 3.5 dB) between the tower cabinet and the
antenna. All other tower CCUs should be installed with minimum cable loss.
Allow 0.1 dB loss for each connector. If required, a 1 dB attenuator (similar to the
Pasternack PE7002-1) may be used to attain the desired power at the antenna.
Total Coaxial length
Coax specification 0-120 ft. 121-200 ft. (high-
gain antenna
only)
201-250 ft. (high-
gain antenna
only)
Standard black jacket cable AVA5-50 AVA6-50 AVA7-50
Optional fire retardant cable AVA5RK-50 AVA6RK-50 AVA7RK-50
Cable diameter (nominal) 7/8 in. 1-1/4 in. 1-5/8 in.
Cable weight (lb./ft.) 0.33 0.46 0.70
Minimum bend radius 10 in. 8 in. 15 in.
Cable attenuation @ 915 MHz ~ 1.2 dB/100 ft. ~ 0.84 dB/100 ft. ~0.70 dB/100 ft.
External GPS and WAN Antennas
The primary requirement for any coaxial cable used with the external GPS or WAN
antenna is to have less than 5 dB of attenuation at 1.5 to 1.8 GHz for the entire length of
cable, including connector losses.
You may use any type of 50 ohm coaxial cable, as long as the total loss, including
connectors is less than 5 dB at 1.5 to 1.8 GHz.
If you are using coaxial cable larger (or stiffer) than 1/2 inch superflex, add a short (less
than 5 feet) piece of LMR 400 cable to each end before connecting the cable to the CCU
and the antennas. Use the appropriate connectors between the LMR 400 and larger
coaxial cable.
If the antennas are mounted in an exposed outdoor environment, you must provide
lightning protection and proper grounding. For more information on lightning protection
and grounding, see Lightning Arrestor on page 12, Grounding the Remote/External
Antenna Systems on page 11 and the Motorola R-56 guidelines.