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Tech Head - The Technology Section
Einstein's Alcove
How to determine if a sat tuner is good or bad
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<blockquote data-quote="Low Profile" data-source="post: 586081" data-attributes="member: 190036"><p>The main problem is creating a 'standard' signal. Because free space loss (and transmitted power) will vary - you can't use a transmitted satellite signal for anything absolute, but only as a real time comparison between two receivers.</p><p>To test a receiver I would suggest that a calibrated signal source is used. Most receivers quote a signal level in the order of -65 dBm, which according to my calculation equates to 154uV. This would have to be an IF signal (950MHz to 2150MHz), and would have to be modulated with a test pattern. Then reduce the signal until you 'lose' the signal beyond an acceptable level.</p><p></p><p>Alternatively you could simply set up a received signal chart that users can input details of signals received - and with what set-up. If you are going to do this then I would suggest that you start with one satellite to get any vaguely meaningful data.</p></blockquote><p></p>
[QUOTE="Low Profile, post: 586081, member: 190036"] The main problem is creating a 'standard' signal. Because free space loss (and transmitted power) will vary - you can't use a transmitted satellite signal for anything absolute, but only as a real time comparison between two receivers. To test a receiver I would suggest that a calibrated signal source is used. Most receivers quote a signal level in the order of -65 dBm, which according to my calculation equates to 154uV. This would have to be an IF signal (950MHz to 2150MHz), and would have to be modulated with a test pattern. Then reduce the signal until you 'lose' the signal beyond an acceptable level. Alternatively you could simply set up a received signal chart that users can input details of signals received - and with what set-up. If you are going to do this then I would suggest that you start with one satellite to get any vaguely meaningful data. [/QUOTE]
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Einstein's Alcove
How to determine if a sat tuner is good or bad
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