The equipment used in an-apg83 radar has a signal range of 370km.
But there is also the detection range of target (knowing what your target is and where it is.)
This detection range , according to below site is 65 nautical miles (120km).
The Northrop Grumman AN/APG-83 scalable agile beam radar (SABR) for U.S. Air Force F-16 fighters by Lockheed Martin is to provide 5th generation radar features akin to those of the […]
www.aviationtoday.com
And the range of locking on to a target in real world. That, according to what
@Afif has posted, is under 50 nautical miles (under 90km).
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