Same difference. Return loss is the amount, in dB, that the
reflected signal (power) is down from the forward or incident wave.
The ARRL Handbook has a converstion nomograph. However,
it is obvious that a 1:1 VSWR would be a very high value of
return loss (>40 or 50 dB), and a short or very high
SWR would yield a RL close to 0dB.
I'm surprised that AEA is using RL as that is usually used in the 75 Ohm world
of cable television, whilst SWR is the 50 Ohm world of RF communications.
Maybe I should introduce Towertalkians to SRL (structural return loss), which
is used to qualify hardline coaxial cables?
73,
Bob AA0CY
20 years in the technical side of cable television
----------
From: Tom Champlin[SMTP:w0hh@ix.netcom.com]
Sent: Monday, September 28, 1998 7:10 PM
To: towertalk
Subject: [TowerTalk] return loss
Gentlemen,
Saturday I received my AEA CIA-HF, sn#0073 ver.1.3. Since then I have
been trying to familiarize myself with it. I'm getting "return loss"
figures in DB. Would someone be kind enough to tell me about this as I
only have a vague idea about it.
Thank you,
Tom, W0HH
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