12713140-002-2 Revision E – October 2006 SSU-2000e User’s Guide 73
Chapter 2 Installing the SSU-2000e
Connecting Antennas
Connecting Antennas
The SSU-2000e chassis has two antenna connections located on the front panel.
The antenna connections are made via a Type-N connector J6 labeled
ANTENNA-A and isolated TNC connector J7 labeled ANTENNA-B. These
connections are used for radio receiver antenna connections only. Refer to the
SSU-2000e Technical Reference for installation procedures and additional
instructions.
Handling Modules
The SSU-2000e main shelf has twelve plug-in module slots. The module slots are
numbered from left to right looking at the front of the shelf, A1 through A12. Each
module slot has a specific address as listed in
Table 2-7
. Each module slot has two
hybrid DIN connectors associated with it on the backplane. The hybrid contacts of
these connectors are used for power, logic ground, frame ground, and radio
frequency (RF) connections. Each module slot has three pins connected together on
each Hybrid DIN connector which are used for module removal detection. Signals on
the back panel are configured as differential pairs unless they are considered static,
or because of the signal type, they are required to be single ended.
Warning: To avoid serious injury to personnel or damage to
equipment, exercise caution when working near high voltage
lines. In particular:
Use extreme caution when installing the GPS antenna near,
under, or around high voltage lines.
Follow local building electrical codes for grounding using the
frame ground lugs integrated with the SSU-2000e chassis.
The in-line amplifier receives 5 VDC power from the GPS
radio receiver, and is supplied on the center conductor of the
LMR-400 or equivalent coaxial cable. If the application
requires an in-line amplifier, mount the amplifier/plate
assembly where the transient eliminator would normally be
mounted.
Symmetricom does not recommend cutting the antenna
cables provided in the GPS Antenna Kit.
Table 2-7. Module Slot Addresses in the Main Shelf
Module Type Slot Address
Clock Module A A1 1A01
Communications Module A2 1A02
I/O Module A3 1A03
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