Consonics CyberTek Qualifier Руководство пользователя - Страница 13
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Печатать страницуAntenna
Transmitter
To qualify the shielding integrity of the cabling within the residence, the drop cable is
disconnected from the ground block. A precision receiver is connected to the ground block
(to the connection the drop cable was removed from) with a length of quality jumper cable.
The receiver is tuned to the frequency of the transmitter and measures the level of test signal
being received by the internal cabling. The level of the received test signal is compared to a
reference standard to determine if the shielding integrity of the cabling within the residence
is acceptable. Test signal level measurements may be indicated by the receiver in common
units of measurement, such as µV or dBmV. The receiver may automatically perform the
level comparison function and produce a Pass/Fail message. If the measured level of the test
signal is greater than acceptable limits, each routing of the internal system may be tested
individually to determine the fault. Usually a CATV signal splitter is located in close
proximity to the ground block. Disconnecting individual cables from the splitter and
retesting allows for insolating the faulty routing.
Service Vehicle
Receiver
Local Tap
Drop Cable
Ground Block
9
Qualifier Supplement
Inside Cables