Qualifier Supplement
11
An enhancement to the integrity (ingress) test system is the function of the receiver
activating the transmitter only when measurements need to be made. Thereby reducing
vehicle power drain, transmitter heating, and general RF pollution. Additionally, the
activation signal from the receiver is encoded and the transmitter recognizes the encoded
activation signal. In this manner, false transmitter activation is eliminated. A multitude of
activation codes is available allowing multiple test systems to be in operation in the same
vicinity. Only the transmitter associated with a given receiver code activates when needed.
In practice the transmitter and activate antennas can be combined into one dual band antenna
with a diplex filter at the transmitter/receiver.
A further enhancement is the coding of the transmitter signal. In this manner, the receiver
can reject measurements not recognized as those from the test transmitter.
Other enhancements include: measurement data storage within the receiver for later retrieval
and analysis, integration with GPS system for location and time data, integration with a
cable modem or wireless device for data transfer to a central CATV location or internet
access.
Inside Cables
Drop Cable
Ground Block
Local Tap
Receiver
Service Vehicle
Transmitter
Transmitter Antenna
Activate Antenna
Activate
Signal
Содержание CyberTek Qualifier
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