Motorola SG 2000 Redundant Receiver Mode, Broadband/Narrowcast Mode, Redundant receiver

5 - 2 O p e r a t i o n

Redundant Receiver Mode

Operation in the redundant mode requires the installation of two optical receivers, one in position A and the other in position B. An SG2-ABJ/P jumper board must be plugged into the lid motherboard. Figure 3-1 illustrates the location of this jumper board.

The SG2-LIDB distributes an RF signal from receiver A or B to the RF chassis as illustrated in Figure 5-2:

Figure 5-2

Redundant receiver

Optical

receiver C

	SG2-ABJ/P
			A	RF chassis
JXP
		JXP

Optical

receiver B

Optical

receiver A

JXP

JXP

Relay

Broadband/Narrowcast Mode

For broadband/narrowcast operation, the broadcast optical receiver must be installed in position C and the narrowcast receiver in position A. If redundancy is required for the narrowcast channel, install the backup receiver in position B. An SG2-FBS split-band combiner board must also be plugged into the lid motherboard as illustrated in Figure 3-1.

The SG2-LIDB distributes a broadband signal from receiver C to the RF chassis. It also distributes a narrowcast signal from receiver A or B to the RF chassis as illustrated in Figure 5-3:

Figure 5-3

Broadband/narrowcast

				SG2-FBS
	Optical	JXP		A	RF chassis
	receiver C
				HPF
Secondary	Optical	JXP
	receiver B
			Relay
Primary	Optical	JXP
	receiver A

SG 2000 Installation and O peration Manual