User's Manual

CrossFire iDAS – All-Digital Transport System

User Guide

Nano Power - CrossFire User Guide

1. Preface

1.1. Safety Instructions

Before installing and operating CrossFire, read and comply with the following safety instructions:

Engineering Design

CrossFire achieves signal amplification of the uplink and downlink through direct coupling of 2G, 3G

and LTE signals from a base station. The expansion unit accesses WLAN signals and combines these

signals with the BTS signal indoor coverage. Normal use of the system will not damage the base

station; however, additive uplink noise resulting from the use of many NPRUs may affect the sensitivity

of the base station, which should be considered during engineering design.

Grounding

The chassis of the access and expansion units have protective ground terminals. During installation,

connect the ground terminals securely to the protective building ground with yellow and green

conductors or with braided ground wire. Also, the aerial and feeder must be adequately grounded.

Power Supply

The power source must be within the required range of the device. The rated voltage range for the AC

power supply system is 100 ~ 240VAC and the rated frequency range is 50Hz / 60Hz. The rated power

of the AU, EU-E and NPRU is 80W, 100W and 65W, respectively. The ground terminal of the

three-core power socket used at the device installation site must be securely connected to the

protective building ground.

Electric Shock Prevention

Touching the internal power supply units is dangerous. To prevent electric shock, do not perform

live-line work.

Optical Module

While fiber optic power levels used in this system are very low, it is advisable to avoid exposing the

human eye to the laser light emanating from a fiber port or plug.

Device Configuration

Prior to upgrading and plugging in units and parts, first disconnect the standby lithium battery and

power source.

BTS Downlink Signals

Signals coupled from the BTS shall be no greater than +15dBm, otherwise the device will not operate

normally and damage may occur to the circuit.

Convection Cooling

Reserve at least 40mm of height above the radiation fins during device installation, otherwise the

device temperature may rise and affect the service life of the device.

WLAN Protection