configuration – invalidate the GPS reference causing SecureSync to either trans-
ition into Holdover mode (see"Holdover Mode" on page246), or go out of sync.
Even if you decide to turn off SecureSync's Auto Sync Control feature, which
allows BroadShield to disable the GNSS reference, BroadShield will still add value
to your overall system capability by telling you (a) if your GNSS receiver is being
spoofed, and (b) in the event of a signal loss due to jamming, why the signal is
lost.
Also, if a normally strong GNSSsignal becomes weakened, BroadShield's
algorithms are capable of discerning a jamming event from natural events caus-
ing the signal to weaken.
Note: For an effective jamming detection, and – to some extent –
spoofing detection, a good antenna placement with optimal sky view
resulting in a high signal-to-noise ratio is essential. A strong signal is
required to discern between normal signal fluctuations and a non-nat-
ural divergence of signal strength.
BroadShield Requirements
In order for BroadShield to work on your SecureSync system, the following
requirements must be met:
1. The optional BroadShield software license needs to be enabled by applying
the OPT-BSH BroadShield license key. For more information, contact your
local Safran Sales Office. To determine if BroadShield has been activated on
your SecureSync unit, navigate to TOOLS: SYSTEM > Upgrade/Backup.
The center panel System Configuration will list the Options installed in
your unit.
Activating the BroadShield License
If you have purchased the BroadShield license key and now want to activate it,
please follow the instructions under "Applying a License File" on page339.
To confirm that BroadShield has been activated on your SecureSync unit, nav-
igate to TOOLS: SYSTEM > Upgrade/Backup. The center panel System Con-
figuration will list the Options installed in your unit.
Enabling/Disabling the BroadShield Service
The Broadshield service can be run in two operating modes:
BroadShield only: In the event jamming or spoofing is detected,
SecureSync will emit a Major Alarm, however it will continue to consider the
GNSS reference as valid, i.e. it will NOT go out of sync.
3.3 Managing References
CHAPTER 3 • SecureSync 2400 User Manual Rev. 5.2
217
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