Broadshield - Safran VersaSync User Manual

If no other reference is found, the unit will transition into a 1200-second coasting
period. During this coasting period, the TIME and 1PPS references will continue to
be considered valid, but VersaSync's oscillator will flywheel. Note that the PPS ref-
erence status light will turn yellow. After expiration of the 1200 seconds the unit
will transition into Holdover.
Should, however, the above- mentioned higher threshold value no longer be
exceeded, the unit will remain in the 1200-second flywheel mode until either (a)
the lower threshold value is no longer exceeded, or (b) the 1200-second flywheel
period expires. In both cases the PPS status light will turn green again.
Smart reference monitoring is OFF by default. To turn it ON:
3.3.2.2

BroadShield

What is BroadShield?
BroadShield is an optional software module for VersaSync that is capable of
detecting the presence of GPS jamming or spoofing in real time.
How BroadShield Works
BroadShield monitors the GPS signal frequency band by applying proprietary
error detection algorithms. If a threshold signal monitoring value level is
exceeded, VersaSync will emit a Major Alarm and – depending on your system
configuration – invalidate the GPS reference causing VersaSync to either trans-
ition into Holdover mode
Even if you decide to turn off VersaSync'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
CHAPTER •
3 VersaSync User Manual Rev. 12
1. Navigate to MANAGEMENT > OTHER:
2. In the Status panel on the left, click the GEAR icon. The
window will open.
3. Check the box next to
Disciplining.
1PPS Phase Validation
(see"Holdover Mode" on
3.3 Managing References
Oscillator Settings
and click Submit.
page 219), or go out of sync.
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