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Analogue 70MHz IF Loop receiver
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<blockquote data-quote="s-band" data-source="post: 1153394" data-attributes="member: 407744"><p>[USER=175144]@Channel Hopper[/USER] I presume that the tweaks on your PLL board adjusted the loop filter to optimise the bandwidth for best demod. Does it make much difference if you add extra filtering in that set-up?</p><p></p><p>[USER=175007]@Llew[/USER] The IF loop is OK on the 4500. The problem is that we can't find a user manual and it's been 30 years since I used one so can't remember how to drive it. The 4500 is unusual, especially by today's standards, as it has set channels that are adjusted for fine tune, polarisation, audio, filters etc, per satellite and per transponder. That made scanning the band time consuming. Once found, the channel could be stored as a favourite.</p></blockquote><p></p>
[QUOTE="s-band, post: 1153394, member: 407744"] [USER=175144]@Channel Hopper[/USER] I presume that the tweaks on your PLL board adjusted the loop filter to optimise the bandwidth for best demod. Does it make much difference if you add extra filtering in that set-up? [USER=175007]@Llew[/USER] The IF loop is OK on the 4500. The problem is that we can't find a user manual and it's been 30 years since I used one so can't remember how to drive it. The 4500 is unusual, especially by today's standards, as it has set channels that are adjusted for fine tune, polarisation, audio, filters etc, per satellite and per transponder. That made scanning the band time consuming. Once found, the channel could be stored as a favourite. [/QUOTE]
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Analogue 70MHz IF Loop receiver
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