If you use a cable modem or black box, most have a built in feature that you
can access from your computer. If I type in http://192.168.100.1/ ,I get the
current signal level at my cable modem (plus s/n ratios etc.). Mine varies
from -3 to -8 dbmv.

Comcast has probably a similar setup. If they have a "help" group, ask
there.

A TV is worthless as a signal level indicator. TV frequencies are in the
100-300 MH range, whereas the cable uplink is around 600-900 MH, a different
ballpark. You may have great TV reception but your cable connectivity may be
terrible.
--
Walter
www.rationality.net
-
"Jim Yanik" . wrote in message
.. .
Eric wrote in news:OaadnZWMNonbEkHfRVn-
:

What does it take to measure the Cable TV signal strength at the box?
ie: how do you do it, and what are good, bad, and poor values?
Thanks
Eric

A Signal Level Meter;it tunes into each channel and measures the signal
level,signal to noise level,some even have a TV screen so you can visually
check the signal with a known good "receiver".

TEK RFM150 would be one example. Wavetek and other companies also make
SLMs.

--
Jim Yanik
jyanik
at
kua.net