• source on page 1721
Integrated Global Navigation Satellite System (GNSS) on ACX500 Series Routers
Global Navigation Satellite System (GNSS) is a navigation aid system that uses signals
from satellites to calculate the actual position of a GPS-capable receiver. These signals
are not only used for determining the position of the receiver on Earth but also as a very
accurate time base.
The ACX500 series router has the GNSS receiver integrated into the system. This
eliminates the need to have an external GPS receiver. However, you will need a GPS
antenna. The ACX500 series routers support GNSS input through SubMiniature version
A (SMA) connector. You can configure the GNSS port and its associated parameters at
the [edit chassis synchronization] hierarchy level.
You can configure the GNSS port by including the constellation gps] CLI statement at
the [edit chassis synchronization port gnss] hierarchy level. If you do not specify a
constellation option, then the gps constellation option is considered by default.
The following is the [edit chassis synchronization port gnss] hierarchy level:
[edit chassis synchronization]
port gnss client {
cable-length-compensation {
time delay-in-nanoseconds;
}
constellation [gps];
anti-jamming;
}
NOTE:
•
The range for cable-length-compensation is from 0 to 50000000
nanoseconds.
•
The integrated GNSS receiver in the ACX500 series routers do not support
10-MHz frequency input and output.
ACX500 series routers support grandmaster clock functionality with the integrated GNSS
receiver.
Use the show chassis synchronization gnss command to check the status of the GNSS
receiver. For more information, see show chassis synchronization.
Related
Documentation
show chassis synchronization on page 2386•
• source on page 1721
307Copyright © 2017, Juniper Networks, Inc.
Chapter 9: Configuring Timing and Synchronization
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