ADTRAN 2 x E1 user manual Tracer Description, Introduction, Applications, Spread Spectrum

SECTION 1 TRACER DESCRIPTION

INTRODUCTION

The Dual E1 version of TRACER provides two, individual E1 transports via a 2.4 GHz or 5.8 GHz, direct sequence, spread spectrum microwave link. The transmitter output power is 20 dBm maximum while the receiver sensitivity is -89 dBm @ 2.4 GHz and -87 dBm @ 5.8 GHz. System performance is determined, in part, by the engineering of the microwave link. Each TRACER radio is comprised of two components – the baseband processor and the radio frequency converter (RFC). The E1 interfaces (G.703, G.704 compliant) are provided on the back of the baseband processor, which is mountable in a 515 mm rack. The radio frequency converter is rackmountable adjacent to the baseband processor or mastmountable in a weatherproof enclosure, located up to 110 meters apart, using RG-8 style coax. A single coaxial cable connects the baseband processor (via a Type N connector) to the RFC and another coaxial cable connects the RFC to the antenna (via a Type N connector).

Applications

Any application that would typically use metallic E1 as a transport can use the TRACER instead. Figure
1-1illustrates a typical application. Antenna				Antenna
RackmountRFC			RFCable	RFCable
	TRACERBaseband		IFCable	TRACERBaseband
VT-100
				Processor	E1	RackmountRFC
TerminalRS-232	E1	Processor
E1,MastmountedE1E1EquRFCipment				E1EquipmentE1,E1RackmountedRFC

Figure 1-1. Typical Application

In addition to telephony applications, TRACER can be used in data communications such as inter- networking, video conferencing, and telemetry.

Spread Spectrum

Spread spectrum is a form of communication in which the bandwidth of a message signal is intentionally increased or “spread.” There are two methods of spreading -- frequency hopping and direct sequence. TRACER employs direct sequence spread spectrum.

TRACER 2 x E1 User’s Manual 1