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2.5 SYSTEM 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
DCE
INT. CK
DCE
EXT. CK
DTE
TX. CLK
TX. CLK
EXT. CLK
SUB DTE
MAIN
DTE
SUB DCE
Figure 2.4
Synchronization on Main Channel Modem’s Clock
RSD-20 OPERATOR'S MANUAL INSTALLATION
2.5