RAD Data comm operation manual System Synchronization and Clock Distribution, RSD-20/V.35

RSD-20 OPERATOR'S MANUAL INSTALLATION

2.5SYSTEM SYNCHRONIZATION AND CLOCK DISTRIBUTION

2.5.1 RSD-20/V.35

Four alternatives are available for synchronization of the system:

a)Main channel modem timing signals.

b)RSD-20 internal clock.

c)Sub-channel 1 modem timing signals.

d)Any sub-channel modem timing signals. For this the optional buffer is required.

2.5.1.1 Synchronization on Main Channel Modem Clock

a)Main channel modem – strapped to internal clock.

b)DCEs attached to sub-channels are strapped to external clock.

c)RSD-20 bit rate setting is ignored (bit rate is determined by main channel modem clock).

		RSD-20
		SUB DTE	EXT. CLK	DCE
				EXT. CK
DCE	TX. CLK	MAIN
INT. CK		DTE
		SUB DCE	TX. CLK	DTE

Figure 2.4

Synchronization on Main Channel Modem’s Clock

2.5