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
Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Help with signal strength & quality
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="eskimo" data-source="post: 738281" data-attributes="member: 366224"><p>Hi guys, I am just working towards my NVQ and for one of my assessments I am doing a job for my auntie.</p><p>She has had an aerial up at her static caravan for the last 5 years which she is sure worked fine up until around 9 months ago. When I went around the terrestrial channels 1,2,3,4&5 were all there but very bad quality (Channel 4 was the best although still a biz hazy) But on freeview she was only getting 6 BBC channels, from what I understand it would seem she is only receiving one of the 6 multiplexes from the transmitter.</p><p></p><p>I checked around the wiring and also found a Triax amplified splitter under the caravan with 1 in and 2 out (1 to the lounge & 1 to bedroom) however this was badly installed and full of water. Also the cabling used throughout was copper plated with an air core.</p><p></p><p>I started off replacing the cable for Webro WF100 and removed the amp/splitter for the time being. I attached my Horizon test meter and began moving the aerial to see if I could get any better signal strength or quality. After a bit of playing around the best I could get was:</p><p></p><p>MA - DVB-T </p><p>30 dBUV</p><p>26 dB</p><p></p><p>BBC1 - PAL-I</p><p>46 dBUV</p><p>34 dB</p><p></p><p>MB - DVB-T</p><p>34 dBUV</p><p>28 dB</p><p></p><p>ITV - PAL-I</p><p>44 dBUV</p><p>33 dB</p><p></p><p>MD - DVB-T</p><p>30 dBUV</p><p>28 dB</p><p></p><p>MC - DVB-T</p><p>27 dBUV</p><p>22 dB</p><p></p><p>BBC2 - PAL-I</p><p>44 dBUV</p><p>37 dB</p><p></p><p>M1 - DVB-T</p><p>37 dBUV</p><p>31 dB</p><p></p><p>C5 - PAL-I</p><p>40 dBUV</p><p>36 dB</p><p></p><p>M2 - DVB-T</p><p>37 dBUV</p><p>28 dB</p><p></p><p>C4 - PAL-I</p><p>48 dBUV</p><p>41 dB</p><p></p><p>The aerial is mounted on a pole around 3 meters tall and is roughly 21 miles away from the Emley Moor Transmitter.</p><p></p><p>Firstly can anyone recommend whether an amplifier would be the best option? A new aerial & Amplifier or whether I need to look at getting the aerial on a taller pole???</p><p></p><p>Sorry for such a newby question but I am having to teach myself from books as my NVQ is a bit of a joke with no real classroom work (I have just paid to attend a 2 day private course in March but thought I would get this done now for my portfolio)</p><p></p><p>Also how do I know how high to put an aerial if it is not on a roof and I cannot see the transmitter or is it just a case of the higher the better?</p><p></p><p>Secondly is there any rule of thumb for choosing an aerial or is it worth keeping a few different sizes in stock to enable me to try a bigger on if the first doesn't work?</p><p></p><p>Finally (Sorry) what would be the minimum dBUV and dB levels to get a good digital reception?</p><p></p><p>Sorry for such a long thread and thanks in advance.</p></blockquote><p></p>
[QUOTE="eskimo, post: 738281, member: 366224"] Hi guys, I am just working towards my NVQ and for one of my assessments I am doing a job for my auntie. She has had an aerial up at her static caravan for the last 5 years which she is sure worked fine up until around 9 months ago. When I went around the terrestrial channels 1,2,3,4&5 were all there but very bad quality (Channel 4 was the best although still a biz hazy) But on freeview she was only getting 6 BBC channels, from what I understand it would seem she is only receiving one of the 6 multiplexes from the transmitter. I checked around the wiring and also found a Triax amplified splitter under the caravan with 1 in and 2 out (1 to the lounge & 1 to bedroom) however this was badly installed and full of water. Also the cabling used throughout was copper plated with an air core. I started off replacing the cable for Webro WF100 and removed the amp/splitter for the time being. I attached my Horizon test meter and began moving the aerial to see if I could get any better signal strength or quality. After a bit of playing around the best I could get was: MA - DVB-T 30 dBUV 26 dB BBC1 - PAL-I 46 dBUV 34 dB MB - DVB-T 34 dBUV 28 dB ITV - PAL-I 44 dBUV 33 dB MD - DVB-T 30 dBUV 28 dB MC - DVB-T 27 dBUV 22 dB BBC2 - PAL-I 44 dBUV 37 dB M1 - DVB-T 37 dBUV 31 dB C5 - PAL-I 40 dBUV 36 dB M2 - DVB-T 37 dBUV 28 dB C4 - PAL-I 48 dBUV 41 dB The aerial is mounted on a pole around 3 meters tall and is roughly 21 miles away from the Emley Moor Transmitter. Firstly can anyone recommend whether an amplifier would be the best option? A new aerial & Amplifier or whether I need to look at getting the aerial on a taller pole??? Sorry for such a newby question but I am having to teach myself from books as my NVQ is a bit of a joke with no real classroom work (I have just paid to attend a 2 day private course in March but thought I would get this done now for my portfolio) Also how do I know how high to put an aerial if it is not on a roof and I cannot see the transmitter or is it just a case of the higher the better? Secondly is there any rule of thumb for choosing an aerial or is it worth keeping a few different sizes in stock to enable me to try a bigger on if the first doesn't work? Finally (Sorry) what would be the minimum dBUV and dB levels to get a good digital reception? Sorry for such a long thread and thanks in advance. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Help with signal strength & quality
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