[RFI] CATV Frequencies for Leakage Probes

[Jim Brown]

I'm working on updates to the ARRL Handbook, and would like to provide 
frequencies for carriers that can be used to probe for cable leakage. 
The idea is to allow a portable RX (like a talkie with wideband RX) or a 
mobile rig to probe along a system.

A Rigol looking at my drop from the Comcast system here in NorCal shows 
a strong carrier at about 67.2 MHz (-41 dBm), and another around 133.23 
MHz (-48 dBm). Everything else is around -70 dBm. (I buy only internet 
and basic cable, so I see nothing below 67.2 MHz. Comcast discontinued 
un-scrambled QAM several years ago when the FCC voted to allow them to 
do so.)

Can anyone provide info about other systems commonly in use?

Thanks and 73, Jim K9YC