MBF-40 SMR900 PS REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless
–
Coverage
Date: 31-May-18
www.cobham.com/wireless
Doc. No. 00141UM
Rev. 1.0
Page |
8
2.2.1 RF Cable Installation Guidelines
•
For all coaxial connections to/from the Repeater – use high performance, low-loss, 50 ohm coaxial
communication cables.
•
All cables shall be weather-resistant type.
•
Cable length – determined by the Repeater installation plan. When calculating the cable length, take into
account excess cable slack so as not to limit the insertion paths.
•
Make sure the cable and the connector are compatible. Using cables and connectors from the same
manufacturer is helpful.
•
All connectors must be clean and dry.
•
Make sure enough room has been allocated for the bending radius of the cable. RF cables must not be
kinked, cut or damaged in any way.
•
Connect the RF cable to the antenna tightly but without damaging threads.
•
Fasten cable tightly to cable ladder or aluminium sheet.
•
For short length feeder cables, use 1/2-in; for longer feeder cables, use 7/8-in. Choose thicker coax
cables for lower attenuation. Minimize the length of the coax cables to reduce attenuation.
•
Use jumper cable for easy installation. The RF coaxial cable can be substituted at each end with a
jumper cable.
2.2.2 Grounding Wires Requirements
WARNING!
Do not use the repeater grounding bolt to connect external devices.
Requirements for grounding wires
•
Ensure that good grounding protection measures are taken to create a reliable repeater site.
•
Make sure to use adequately dimensioned grounding cables. The minimum recommended conductive
area for a grounding cable is 16 mm
2
•
Make sure the grounding product used is suitable for the type and size of used cable.
•
Connect the repeater box bolt to the same ground.
2.2.3 Power Requirements
This section describes the circuit breaker requirements and power cabling and connection considerations for
230 VAC power source and for -48 VDC power sources.
2.2.3.1 Circuit Breaker Requirements
The power connections to the unit are hard-wired. To disconnect the unit (either manually or automatically
in case of overcurrent), it is required to install a circuit breaker on the wall near the unit, at an easily
accessible distance and location from the unit.
Circuit-breaker minimum requirements
•
115 VAC — maximum current 10A
•
Needs to be safety approved
•
Use only a two-pole disconnect device.
•
Requires minimum contact separation of 3mm.
•
Install on the wall near the unit.
Содержание MBF-40 Americas
Страница 12: ......
