QAM Marker
Signal Source
rev1.0.5 August 15, 2017
5
Introduction
The ComSonics’ new leakage detection solution is a system which allows detection of CATV leakage in an
all-digital system without reserving any bandwidth for a discrete leakage carrier.
It is a CATV leakage detection system made up of two parts. The first part is a QAM Marker Signal
Source which is installed at a headend or hub of a CATV system. The second part is the
handheld/mobile unit for finding leaks or the GE
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ACIS QS (GQS) mobile unit for vehicle applications.
The QAM Marker signal source generates a standard set of frequencies to allow the handheld devices
to detect leaks only from the CATV system to which they are matched. The QAM Marker signal source
can be configured differently for up to three CATV systems in an overbuild area to distinguish leaks
between the CATV systems. The handheld detectors and GQS devices must be configured to match
the appropriate QAM Marker Signal Source.
The GE
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ACIS QS mobile unit is a GPS Enabled Automatic Cable Integrity System delivering unmatched
leakage location and management technology. It makes cable plant optimization automatic and
affordable. This hands free solution mounts easily in the cable operator’s vehicles, detecting system
leaks in real time as the technician performs their regular duties. Leak intensity and location are
recorded and uploaded by cell phone GPRS technology to the central server allowing the cable
operator to view their leaks, manage work orders and monitor results. GE
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ACIS QS gives the ability to
proactively manage the cable plant to optimize performance and customer satisfaction.
The handheld leakage detectors and the GQS units use sophisticated methods to detect and measure
QAM Marker Signal Source leaks from the CATV system. They can differentiate a true leak from
general noise or signals originated by another marker in a co-located CATV system.
The QAM Marker Signal Source can be configured through via a network connection using a standard
web browser. An Ethernet network internet connection is required. Cable not supplied.
Unpacking - The QAM Marker Signal Source and any ordered accessories are included in a shipping
container designed to provide the maximum protection during shipment. Upon receipt, inspect the
container and contents for signs of physical damage. Notify the freight forwarder of any damage
detected.
Please dispose of the cardboard packaging carefully and recycle where possible.
Power - The QAM Marker is powered by a standard AC detachable power cord.
Allow 15 seconds for the QAM Marker to initialize after applying power.
