Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
Fringe Reception General
Signal power
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="spiney" data-source="post: 158675" data-attributes="member: 192438"><p>Strength is signal strength. In free space it's (electric) field strength in microvolts per meter, at your receiver input it's power in microwatts. Both are particular figures, which would readout on appropriate test equipment, but most sat receivers don't show a numerical value, just a bargraph!</p><p></p><p>Quality is a measure of received bit error rate, if this exceeds a certain proportion then the MPEG2 bitstream can't be decoded. This is usually measured at the post-Viterbi stage (pre MPEG decode), and again is a particular figure, which some sat receivers show.</p><p></p><p>Generally speaking, quality goes down (error rate rises) as strength falls, but you can have high strength with still low quality, usually due to interference, possibly bad amplifiers or strong signal reflections on cables.</p></blockquote><p></p>
[QUOTE="spiney, post: 158675, member: 192438"] Strength is signal strength. In free space it's (electric) field strength in microvolts per meter, at your receiver input it's power in microwatts. Both are particular figures, which would readout on appropriate test equipment, but most sat receivers don't show a numerical value, just a bargraph! Quality is a measure of received bit error rate, if this exceeds a certain proportion then the MPEG2 bitstream can't be decoded. This is usually measured at the post-Viterbi stage (pre MPEG decode), and again is a particular figure, which some sat receivers show. Generally speaking, quality goes down (error rate rises) as strength falls, but you can have high strength with still low quality, usually due to interference, possibly bad amplifiers or strong signal reflections on cables. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
Fringe Reception General
Signal power
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top