 alphapointeDon't Touch MePremium,MVM
join:2002-02-10
Columbia, MO
kudos:2
 ·Socket Internet ..
| Unit Conversion Help I just got a spectrum analyzer (Tek RFM151), but it's made for CATV, so it reports levels in dBmV instead of dBmW. Is there a simple way to convert from one to the other?
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jacourPremium
join:2001-12-11
Matthews, NC Reviews:
 ·RoadRunner Cable
·SureWest Cable
| Wikipedia explains it better than I can.
dBmV
dB(1 mVRMS) – voltage relative to 1 millivolt across 75 Ù. Widely used in cable television networks, where the nominal strength of a single TV signal at the receiver terminals is about 0 dBmV. Cable TV uses 75 Ù coaxial cable, so 0 dBmV corresponds to −78.75 dBW (−48.75 dBm) or ~13 nW. |
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 SmokChsrWho let the magic smoke out?Premium
join:2006-03-17
Saint Augustine, FL | reply to alphapointe
I found a manual for it on line and it says you can change the units to dbuV not that that's going to help much..
»128.238.9.201/~kurt/manuals/manu···tion.pdf |
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 Killa200Premium
join:2005-12-02
Southeast TN
4 edits | reply to alphapointe
X = dBmV
anti log (X/20) = mV
mV^2 / Cable impedance = dBmW
If i remember correctly. From that math, i'm getting 3.7dBV = .0469dBW @ 50ohm, or 1.01watts. |
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