8-2
Cisco 1120 Connected Grid Router Hardware Installation Guide
OL-26438-02
Chapter 8 About Connected Grid Antennas
Router Antennas Overview
Figure 8-1
Router WiFi and GPS Antenna Locations
GPS Antenna
The Connected Grid GPS Antenna kit (optional) includes the following items:
•
GPS antenna with integrated 15-foot coaxial cable (see
Figure 8-2
)
•
Male QMA connector adapter, to connect the cable to the router GPS antenna port
•
Hardware required to mount the antenna, for example on the substation or utility cabinet exterior
This antenna provides connectivity to the GPS system, from which the router derives precise time and
location information while operating on the network.
GPS Antenna Information
Caution
If the antenna is mounted outside, the antenna assembly must be grounded either at the bracket or at the
external building point where the cabling enters the building. This is critical because if it’s not grounded,
the CGR 1120 chassis would be isolated on the antenna card very close to AC isolation requirements.
Also see Statement 1052 below.
Table 8-1
Router WiFi and GPS Antenna Locations
Item
Feature
1
WiFi antenna port
2
GPS antenna port
302342
1
2