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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
ESTV on Arabsat 5C @20 East
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<blockquote data-quote="Vipersan" data-source="post: 806172" data-attributes="member: 325666"><p>Thanks for checking guys ..</p><p>I have it back now ..</p><p>This ones a mystery ?</p><p>I have a mechanical push-button A B switch in the system which allows me to switch the F15 or indeed ..any selected receiver to either the diseqc 1.1 switch ..and the rest of the dishes in the system ..</p><p>Or indeed bybass this and connect the Cband lnb only directly to the stb chain..</p><p>Switching to position A connects to the uncomitted switch and isolates the cband direct feed(for dxing )</p><p>Switching to position B reverses this ..connecting the Cband lnb directly to the receiver chain ..and isolates the uncomitted switch ..</p><p>In the A position the B side of the switch should _not_ have any effect ...in theory ..</p><p>..but it does ..but only at this specific frequency it seems..</p><p>Totally disconnecting the F connector on B whilst leaving the switch in the A position brings back this mux at around 11 db..</p><p>So the presence of the switch even though isolated in position B behaves as a notch filter at one specific frequency..</p><p>I'll order a replacement I think ...as there looks to be an issue internally ..</p><p>Perhaps corrosion creating a resistive path ...ie NOT truely isolated.</p><p>Mystery solved ..but nonetheless fascinating.</p><p>cheers m8s</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 806172, member: 325666"] Thanks for checking guys .. I have it back now .. This ones a mystery ? I have a mechanical push-button A B switch in the system which allows me to switch the F15 or indeed ..any selected receiver to either the diseqc 1.1 switch ..and the rest of the dishes in the system .. Or indeed bybass this and connect the Cband lnb only directly to the stb chain.. Switching to position A connects to the uncomitted switch and isolates the cband direct feed(for dxing ) Switching to position B reverses this ..connecting the Cband lnb directly to the receiver chain ..and isolates the uncomitted switch .. In the A position the B side of the switch should _not_ have any effect ...in theory .. ..but it does ..but only at this specific frequency it seems.. Totally disconnecting the F connector on B whilst leaving the switch in the A position brings back this mux at around 11 db.. So the presence of the switch even though isolated in position B behaves as a notch filter at one specific frequency.. I'll order a replacement I think ...as there looks to be an issue internally .. Perhaps corrosion creating a resistive path ...ie NOT truely isolated. Mystery solved ..but nonetheless fascinating. cheers m8s VS [/QUOTE]
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Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
ESTV on Arabsat 5C @20 East
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