| To: | <tentec@CONTESTING.COM> |
|---|---|
| Subject: | RE: [TenTec] dbm and VU units of audio measurement |
| From: | "Thomas Jednacz" <tjednacz@ieee.org> |
| Reply-to: | tjednacz@ieee.org, tentec@contesting.com |
| Date: | Tue, 29 Jul 2003 17:04:17 -0400 |
| List-post: | <mailto:tentec@contesting.com> |
I was a broadcast engineer for a while and our meters were VU meters and calibrated as discussed before. Just another input. Interesting to learn how different industries do things. 73, Tom, W7QF Hi Stuart, Not to argue the toss, but... In all my 35 years in the international telecom industry, I never ran across dBmw. All our voice-frequency (VF) level meters were calibrated in dBm. 0 dBm = -30 dBW = 1 mW, independent of impedance. We had 75-ohm selective level meters (for multiplex alignment) and 50-ohm RF power meters which were also calibrated in dBm. Cheers for now, 73, Adam VA7OJ/AB4OJ |
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