Article View: sci.electronics
Article #10754TV input signal levels
From: Brian R. OHern BROHERN
Date: Tue, 29 Sep 1992 11:06
Date: Tue, 29 Sep 1992 11:06
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1834 bytes
I live in a fairly remote area, so I put up a General Instruments FM/VHF/UHF
antenna and pointed it right at the highest frequency station (68 ~795MHz).
To sum: every FM/UHF station within 150 miles is perfect (stereo, color,
bilingual). Channel 68 had some color, stereo, but was very snowy. I put
a broadband (DC-light almost) low noise/linear 30dB amplifier designed for
50 ohms in the line with everything below 600MHz filtered, and 68 was
perfect. I didn't try to match 50 to 75 ohms.
The question is this: the 68 signal level was about 150uV, the VHF stations
were all several mV. If I take the filter out, the signals jump: 68 to
several mV and others to 180+mV. The manuals for my TV and VCR don't specify
a max signal level, so I was wondering if anyone new what the largest signal
level (mV/dbm) a TV can handle without saturation or distortion or damage.
(long story short)
BRO'HERN (Electronics Engineer)
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Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!ames!data.nas.nasa.gov!taligent!apple!voder!wlbr!lonex.rl.af.mil!usenet From: Brian R. O'Hern (BRO'HERN) Newsgroups: sci.electronics Subject: TV input signal levels Message-ID: <1992Sep29.110627.14770@lonex.rl.af.mil> Date: 29 Sep 92 11:06:27 GMT Sender: brohern.rl.af.mil Reply-To: ohernb@lonexb.rl.af.mil Followup-To: same Distribution: na Organization: USAF Rome Laboratory Lines: 23 Nntp-Posting-Host: brohern.rl.af.mil