Connecting the 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 your GNSS antenna for information regarding GNSS antenna installation.

   For additional information on GNSS antenna installation considerations, including cabling, an Orolia tech note is available here.

2. Connect the GNSS cable to the rear panel antenna input jack (see illustration under Unit Rear Panel).
   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)—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.

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 synchronization source by navigating to MANAGEMENT > OTHER: Reference Priority: Confirm that GNSS is Enabled, and its Status for TIME and 1PPS is valid (green).