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:
1.
Navigate to MANAGEMENT > OTHER: Disciplining.
2.
In the Status panel on the left, click the GEARicon. The Oscillator Settings window will
open.
3.
Check the box next to 1PPS Phase Validation and click Submit.
3.3.2.2 BroadShield
What is BroadShield?
BroadShield is an optional software module for SecureSync 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, SecureSync will emit a
Major Alarm and – depending on your system configuration – invalidate the GPS reference
causing SecureSync to either transition into Holdover mode (see "Holdover Mode" on
page210), 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 sys-
tem 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 cap-
able of discerning a jamming event from natural events causing the signal to weaken.
174
CHAPTER 3 • SecureSync User Reference Guide Rev. 26
3.3 Managing References
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