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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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Radio Road Which tuner to get and getting the most from it. Thank God, for the radio! |
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In Reply to: What are the symptoms of a multi-path problem? posted by Scholl on June 23, 2004 at 10:49:47:
in the (tested / reviewed) specs.BUT, this is highly dependent, on a good directional antenna, pointed in the best direction for sufficient signal strength (SS), and minimum multipath.
Many analogue tuners had / have two 'good' meters, SS is often a bit optimistic.But it WAS common to allow the SS needle to flicker a tiny bit, if there was MP in the received signal, minimise that and yr fine.
NB some digitals, have quite good metering but you've got to read the manual, it may well be down two branches in the interface, for one or more buttons!
What's MP SOUND like? Sounds like birdies, but mainly sputters. If you have ever heard FM in a car break up going behind a hill, or down a concrete and glass canyon? YES! Well you have heard MP, at its worst!
MP is a timing problem, and effects Stereo badly, the waves that have bounced not only arrive out of time but out of phase/polarity, a horisontally polarised signal may now be approaching vertical.
There's a worst case scenario here in Canberra, just south of where I live, FM reception becomes impossible for the sub-city of Tuggeranong (the ....... Valley).
We are at the top of that valley, at its mouth, and just between two of its outlying hills, one being the highest in Canberra, barely 500 metres away. The Tugg'g Valley, is one big bowl of the Great Dividing Range / oothills of the Australian Alps, with several smaller bowls, re-entrants and a couple curvey canyons, with suburbs in them.
Almost all Canberra's FM Tx'ers (and TV) are powerful, and on ONE big telecom/restaurant/tower, which fires into the valley (down two openings!) and guess what happens to those strong signals? - bounce, bounce , bounce, boing, boing, boing........
We have got 4 UHF repeaters, for TV, all around the T'g Valley. Nothing for FM though.
SO a good antenna for YOU =>
SHALL,
- on all desired stations.
- drive your FM tuner into 'full limiting' on all desired stations, to minimise Noise and Distortion.
- Minimise Multipath effects, including Noise and Distortion.
NB 'desired' is yr budget V. value problem.
Timbo in Oz
The Skyptical Mensurer and Audio Scrounger
Peace
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Follow Ups
- Scholl! yep, Capture Ratio is the indicative parameter - Timbo in Oz 16:57:55 06/25/04 (6)
- though the reception sounds problematic...... - sober1 16:25:51 06/29/04 (3)
- NB we're at the mouth of the valley - Timbo in Oz 16:55:17 07/03/04 (0)
- Re: though the reception sounds problematic...... - Timbo in Oz 22:04:20 07/01/04 (1)
- we are/were also in the path of one of the fire storms that hit in Jan 2003 - Timbo in Oz 22:06:42 07/01/04 (0)
- Thanks... - Scholl 05:38:57 06/26/04 (1)
- tah - Timbo in Oz 06:14:09 06/26/04 (0)
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