Connecting E1 Or Analog Reference Inputs - Symmetricom TimeSource 3600 User Manual

Chapter 3 Installing the TimeSource 3600
Installing the Shelf

Connecting E1 or Analog Reference Inputs

Caution: To avoid damage to the system, do not connect the E1
output line directly to a point outside the building. The E1 output
circuits do not provide lightning protection.
E1 or analog reference sources, traceable to an independent Stratum 1 source, can
be connected to further increase holdover stability, or to be monitored by the
TimeSource 3600. In either case, connect reference inputs to the wire-wrap pins or
BNC connectors labeled SPAN IN A and SPAN IN B. If using the wire-wrap pins,
connect the tip wire to the pin labeled T, the ring wire to the pin labeled R, and the
shield (if connected at the TimeSource 3600) to the pin labeled S. See
for the location of the connectors and pins, and
connections.
Notes:
1. The shield pin is capacitively coupled to ground. Normally, the
2. A BNC connector can be used for one input, and a wire-wrap
Figure 3-17. E1 or Analog Input Wire-Wrap Connections
80 TimeSource 3600 User's Guide
shield is grounded at the source. Grounding the shield at both
ends is not recommended.
connector can be used for the other input, but do not use the
BNC and wire-wrap connectors of the same input simultaneously.
For example, a BNC connector can be used for input A and the
wire-wrap pins for input B, but do not use the input A BNC
connector with the input A wire-wrap connector.
B
T
R
S
Figure 3-17
A
T
R
S
097-72060-01 Revision J – June, 2007
Figure 3-14
for the wire-wrap