The Viavi TRI-ISTOP-1250MHZ I-Stop Reverse Test Probe, 1.25 GHz, is a test accessory you can use with signal level meters and analyzers for bi-directional measurements with no risk of power damage. Simply screw the probe into the unused KS port of a distribution tap and a spring-loaded "stinger" will connect a nominal 20 dB resistive test point circuit to the seizure screw. The connection is bi-directional, so that an SLM or analyzer connected to the probe can measure forward and reverse signals, as well as reverse ingress. Also, a built-in AC/DC blocking circuit protects the SLM or analyzer from damage from online power up to 100 volts.

The I-Stop reverse test probe is the fastest and safest way to track down reverse ingress with any device that can see the headend ingress view, all the while saving time and operational expenses.