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siemens peb 2086h
335 Stck. im Tray / 165,- €
202411-004-131
2.1 General Functions and Device Architecture
The functional block diagram of the ISAC-S is shown in figure 10.
The left-hand side of the diagram contains the layer-1 functions, according to CCITT I series
recommendations:
– S-bus transmitter and receiver
– timing recovery and synchronization by means of digital PLL circuitry
– activation/deactivation
– access to S and Q channels
– handling of D channel
– test loops
– send single/continuous AMI pulses (diagnostics).
Figure 10