Switch S5 - Advanced Data Port Configuration; Data Inversion; Data Port Clock Source; Data Port Clock Inversion - ADC Kentrox 78220 Operator's Manual

Operator's Manual
Switch S5 — Advanced Data Port Configuration

Data Inversion

The D-SERV DSU/CSU allows the operator to invert the data received
from the DTE. This allows long strings of zeros to be converted to
strings of ones to preserve network T1 pulse density. The DSU at the
far end must also be set for Data Inversion.
Switch S5-1 configures the Data Inversion option.

Data Port Clock Source

The D-SERV DSU/CSU clocks data on the data port in one of two
ways. INTernal looped clock provides a clock internally generated by
the D-SERV DSU/CSU. EXTernal looped clock will clock data using
the clock returned from the DTE, but originally sourced from the
D-SERV DSU/CSU. This option is useful when propagation delays
may be encountered due to long cables, or if a synchronous device
such as a DSU or modem is connected to the data port.

Data Port Clock Inversion

INVerting the clock changes the clocking trigger (on received data
only) from leading edge to trailing edge to function with some DTE
equipment.
Switches S5-2, and S5-3 of S5 control Data Port Clock Source.
NOTE: Selecting DP clock source (Data Port Timing) with
Switches S3-5 and S3-6 automatically sets the Data
Port Clock Source to EXTernal, overriding the
INTernal setting of Switch S5-2. If another Clock
Source is subsequently selected, the INTernal setting
of Switch S5-2 is restored.
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