Hides a distinctive marker signal in the system video carrier used
for leakage testing, making it easy to identify the source of signal
leakage in “overbuilt” areas. Specify tag frequency from 10 to 23 Hz (20
Hz Standard). One per head-end.
The XFTP CT-2 and CT-3 Channel Taggers are headend-mounted devices
used as a system with XFTPs Searcher Plus, Super Plus, and Seeker Lite2
leakage receivers to help identify leakage sources in overbuilt areas,
to increase detection range and to increase immunity to interference.
Used as a system with these leakage receivers, the CT-2 and CT-3 channel
tag eliminates all "false alarm" triggers and increases leak detection
sensitivity by four times over previous models.
When several CATV systems operate in the same area, it is often
difficult to determine which system is the source of a detected leak.
The CT-2 and CT-3 solve this problem by "tagging" the system video
carrier, or the carrier provided by the CT-3, with low-frequency
modulation. This modulation is ignored by TV sets, but causes a
distinctive response in Trilithics leakage receivers, and the Tricorder
signal level meters when operated in leakage mode.