34
TimeAnalyzer 7x00 User’s Guide
098-00208-000 Revision A – February, 2010
Chapter 2 Setting Up
Connecting the GPS Antenna
In general, follow local building codes when selecting a grounding scheme, wire
size, and installation.
Use #6 AWG (13.3 mm) copper ground wire or larger, depending on the distance
to the earth ground electrode. Refer to your local electrical codes for specific
details. In most cases, 1/0 AWG (55.0 mm) ground wire will maintain 1/10 the
resistance of the coaxial shied..
Connect transient eliminators, if part of the grounding scheme, to earth ground
through a conductor.
Symmetricom makes no recommendation as to whether to install transient
eliminators. Symmetricom can provide suitable transient eliminators as an option.
Never connect antenna systems to the same earth ground connector as heating
and cooling systems, elevator or pump motors, or other motors or machinery
which can induce noise in the antenna system.
Note:
Larger ground conductors provide better transient elimination;
that is, the larger the ground conductor, the less likely the chance of
transients.
Note:
Do not
connect the outside transient eliminator ground to the
inside equipment rack ground. Doing so can defeat the protection
afforded by the transient eliminator.