Symmetricom TimeSource 3100, User Manual

Page: 63 / 238

3
TimeSource 3100
63
Installation
097-72020-01 Issue 9: November 2003
2
5
3
S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
1 PPS Output
Connect an RG-58 coaxial cable from the connector labeled TTL PPS to the equipment that
will use the 1 pulse-per-second TTL output signal. See Figure 13 for the connector location.
E1 or Analog Reference Inputs
E l or analog reference inputs, traceable to an independent Stratum 1 source, can be used in
the output ensemble. Also, the performance of one or two references can be monitored. 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 3100) to
the pin labeled S. See Figure 13 for the location of the connectors and pins, and Figure 16
for the wire-wrap connections.
Notes:
1. The shield pin is capacitively coupled to ground. Normally, the shield is grounded at the
source. Grounding the shield at both ends is not recommended.
2. A BNC connector can be used for one input, and a wire-wrap 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.
Warning:
Because the El input circuits do not provide lightning protection, do not
connect the El input line directly to a point outside the building. Failure to observe this
warning may result in equipment damage.
Figure 16. E1 or Analog Input Wire-Wrap Connections