ADCP-75-210 • Issue 1 • March 2007
Table 17. RAN Dimensions
CONFIGURATION | WIDTH | HEIGHT | DEPTH |
RAN | 31.35 in. (76.7 cm) | 36.5 in. (92.7 cm) | 27.5 in. (69.9 cm) |
| | | |
Dual RAN | 31.25 in. (76.7 cm) | 73 in. (185.4 cm) | 27.5 in. (69.9 cm) |
| | | |
2.4.2Power RequirementsPower must be available at the RAN site. The RAN requires 240 VAC, single phase, 20 Amps service. Included with the power meter must be surge protection and circuit breakers.
The RAN can have up to three 1500 watt rectifiers. For the minimum specified voltage (176 VAC), each can draw up to 10 amps. The RAN will draw up to 1800 watts normally, but when batteries are re-charging that amount will increase the current draw into a RAN to up to 16 Amps. Therefore, one 20 Amps service is required per four band RAN.
In a pole mount installation, the power meter is typically installed on the pole below the unit in separate boxes. In a concrete pad installation, an external junction box is typically placed near the RAN providing AC power, surge protection, and circuit breakers.
2.4.3Antenna RequirementADC offers a pole-mount antenna kit (accessory) for use when the RAN is mounted on a wooden utility pole. Either a 2 in. (5.08 cm) O.D. model or a 9 in. (22.86 cm) O.D. model can be ordered. Pole mounting is the most common installation. The antenna interfaces with the PCS and Cellular/SMR bands and supports two branch diversity receive paths. Also included in the kit is the GPS antenna used by the RAN. Installation instructions for the pole mount antenna are included with the kit.
When the RAN is mounted on a concrete pad, a conventional directional antenna may be used (customer supplied). The antenna may be set to operate in either a sector or quasi-omni configuration, depending on the coverage objective and design. Proper antenna selection and the mounting installation are the responsibility of the design engineer.
2.4.4RF Cable RequirementsRF cables are required at the installation site to provide the physical link between the RAN and the antenna. In a pole-mount installation, U-duct of an appropriate size is also required to cover the RF cables on the pole. The U-duct provides only physical protection. It should not be considered to provide electrical isolation from conductors on the pole. Adequate clearance must be obtained for the routing of these cables past the existing services as defined in the previous topic. In a concrete pad installation, RF cables from the antenna are routed and protected per the installation plan provided by the design engineer.
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© 2007, ADC Telecommunications, Inc.
