JDSU launches QAM Signal Egress Troubleshooting

JDSU announced today the availability of a QAM Egress option for the DSAM tester family that enables cable technicians to detect and identify QAM signal egress with a near-field or directional antenna.

This new option offers the simplest, most economical all-in-one solution for managing troublesome UHF (LTE) band leakage/ingress for improved plant reliability and customer satisfaction.

The QAM Signal Egress is a low-cost upgrade which enables all technicians to rapidly find and fix leaks, flexible tuning enables testing in the working environment for virtually any cable system and simple after-service check capability eliminates potential follow-up QAM leakage issues at the work site.

Technicians can use the directional antenna and the QAM Egress mode (tuned to a relatively clean on-air spectrum location) to scan the suspected leak’s location along the cable and associated components. When a QAM signature is detected on-air with the directional antenna, the DSAM channel identification bars turn red and the unit emits a beep for every scan with a detectable QAM signature.

Technicians can then monitor the display while moving the antenna toward the detected signal, and peaked QAM haystacks indicates that the antenna is pointing at the strongest source.

Technicians can proactively verify that any service work performed is leak-free. They pass the near-field probe over the device and/or connections and watch the DSAM QAM egress display for red channel bars.

If a QAM signature is detected, the channel bars turn red and the unit emits a beep with every scan that includes the detected QAM signature. Technicians can then monitor the display while moving the near-field probe over the device/connections, with the signal’s peak indicating the highest received field strength’s location.

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