Back To Back Demonstration Connection; Internal Clock (Other Site In Loop) - Black Box Echo Series User Manual

Configuration

Back to Back demonstration connection

For a simple demonstration, or local network use, two Echo Multiplexers may be connected
'back to back', using a cross over cable arrangement, one unit being set to internal clock
reference, the other to loop clock.
For UK interfaces, a pair of 75 Ohm BNC cables should be used, connecting TX on one unit
to RX on the other and visa versa.
For European interfaces an RJ45 crossover cable should be used, as described in Appendix
G, page 40.
The following diagrams show examples of the available clock options:

Internal Clock (other site in loop)

EXTERNAL
LOCAL
REMOTE
TECHNICAL: 0118 931 2233
Echo 2 Mbps Multiplexer
Clock sourced from external
clock connector. Must be
accurate to 50ppm or better.
External clock rate must be
set on screen to match the
reference used.
"Modified" appears if change
has been made.
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