System Interconnects
Chapter 3: Installation
Page 3-26
VersaMux-4000 Operation & Installation Guide
Part No. 24001157
Revision C
External Clock
Input
provides a diagram of the External Clock Input connectors found on
the VersaMux-4000 rear panel.
Figure 3-24
External Clock Input Connector (BNC)
NOTE:
The VersaMux-4000 External Clock Input does not support a “multi-drop”
configuration.
When the
Ext-Clk-Type
parameter (see
“Ext-Clk-Type Parameter” on page 5-13
) is
set to
RS-422
the impedance between the A and B leads is 100-ohms.
When the
Ext-Clk-Type
parameter is set to
Zero-Crossing
the differential
impedance of the external input is 50-ohms, single ended (center lead only).
When the
Ext-Clk-Type
parameter is set to
Ttl
the input is “High Impedance”
between the center and shield (ground).
NOTE:
The External Clock Input requires a timing signal accuracy of +/- 50 ppm from the
nominal value.
Clock Signal -
Clock
