Sharp VC-488NS Manuel de service télécharger pdf (Page 14)

Chapter 1 - System Description

Alvarion Hardware

GPS Receiver: Specification

The GPS Timing Receiver for the Alvarion eMGW/MGW System,

includes fittings and attachments for the majority of installations.

The GPS Receiver includes Motorola™ M12 technology forming its

receiver section, plus the latest in PLD technology to provide the signal

processing and digital support features.

Figure 1-1: Alvarion GPS Timing Receiver

The GPS Timing Receiver is a complete stand-alone system, designed to

operate in an internal environment requiring only power and GPS

antenna connections.

On the Timing Receiver, there is one R.F. antenna input, a 1PPS port

providing precise timing, one 2.048MHz frequency output, plus two

RS232 serial ports providing command/control functions. A Time of

Day channel also supplies time information.

The GPS Receiver is thermally designed to ensure operation in the

temperature range 0°C to +60°C, with a maximum temperature shock

rate of 10°C per hour when in holdover mode. A full technical

specification is given in Appendix A, page A-1.

Input Power

The GPS is operated from a nominal supply voltage of 48 volts DC (36-

72 volts). This power rating is printed on the casing, above the power

connector on the back of the GPS Timing Receiver.

GPS Timing Receiver Installation and Operation Manual

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Sharp VC-488NS Manuel de service Page 14