Connecting Gnss Input; Connecting Irig Input; Ethernet Connection - Spectracom SecureSync User Reference Manual

2.8 Connecting Reference Input(s) and Network Interface(s)
2.8.1

Connecting GNSS Input

Typical installations include GNSS as an external reference input. If the GNSS receiver is not
installed or if the GNSS will not be used as a SecureSync reference, disregard the steps to install
the GNSS antenna and associated cabling.
1.
Install the GNSS antenna, surge suppressor, antenna cabling, and GNSS preamplifier (if
required). Refer to the documentation included with the GNSS antenna for additional inform-
ation regarding GNSS antenna installation.
2.
Connect the GNSS cable to the rear panel antenna input jack (see illustration under "Rear
Panel" on page 6).
In the event that NO antenna is connected to the rear panel jack, SecureSync will—once it
gets powered up (see "Powering up the Unit" on the facing page)—activate the Antenna
Problem alarm, causing the front panel " Fault " light to be blinking orange (the Antenna
Problem alarm indicates an open or short exists in the antenna cable.)
Unless there is an open or short in the antenna cable, the " Fault " light should stop flashing
orange once the GNSS antenna and coax cable are connected to the rear panel. If the
" Fault " light does not stop flashing after connecting the antenna, refer to "Troubleshooting
GNSS Reception" on page 451.
Initial synchronization with GNSS input may take up to 5 minutes (approximately) when used in
the default stationary GNSS operating mode. If using GNSS, verify that GNSS is the syn-
chronization source by navigating to MANAGEMENT/OTHER/Reference Priority : Confirm that
GNSS is Enabled , and its Status for TIME and 1PPS is valid (green).
2.8.2

Connecting IRIG Input

With the available IRIG Input/Output option card module (Model 1204-05) installed in an option
bay, IRIG time code from an IRIG generator can also be applied as an external reference input
(either in addition to, or in lieu of GNSS, NTP, user set time and other available reference inputs).
If IRIG input is desired:
Connect the IRIG time source to the BNC connector "J1" on the IRIG Input/Output module.
Refer to the IRIG Input/Output module section for additional information regarding IRIG
Reference input.
2.8.3

Ethernet Connection

SecureSync provides a base 10/100 Ethernet port for full NTP functionality, as well as a com-
prehensive Web-based user interface for configuration, monitoring and diagnostic support. Addi-
tional network ports are available with the Gigabit Ethernet option card (1204-06).
The Ethernet port is provided on the back panel for easy connection to routers, switches, or hubs.
1.
Determine if you want to configure your SecureSync unit using a computer connected to the
network, or a computer connected directly to your SecureSync unit.
26 CHAPTER •
2 SecureSync User Reference Guide Rev. 18