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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-band Servo Polarity Mod
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<blockquote data-quote="John" data-source="post: 963302" data-attributes="member: 175005"><p>Well .....</p><p>been doing a bit of evaluation between the old Cband Chaparral servo / new motorised project / single feed+scalar ring choice.</p><p>Briefly, the new motorised polarity servo unit + Primesat lnb for H/V ...LHC/RHC gives around 2dB better signal performance over the old unit. The use of just a single feed + Norsat pll lnb + conical scalar used on either H or V has a slightly better performance, 1/2 a dB or so, as you would expect. Here's a surprise ..... change the conical scalar on the single feed to a Cone scalar and got at least 1/2 db increase ... only small increases but every bit helps when trying to squeeze the last drop out of a 1.8 CM system.</p><p>Note: Everything in the pics are in prototype mode, a tidy up of all brackets, nuts & bolts, cables, earthing etc to be done in warmer weather. :-)</p></blockquote><p></p>
[QUOTE="John, post: 963302, member: 175005"] Well ..... been doing a bit of evaluation between the old Cband Chaparral servo / new motorised project / single feed+scalar ring choice. Briefly, the new motorised polarity servo unit + Primesat lnb for H/V ...LHC/RHC gives around 2dB better signal performance over the old unit. The use of just a single feed + Norsat pll lnb + conical scalar used on either H or V has a slightly better performance, 1/2 a dB or so, as you would expect. Here's a surprise ..... change the conical scalar on the single feed to a Cone scalar and got at least 1/2 db increase ... only small increases but every bit helps when trying to squeeze the last drop out of a 1.8 CM system. Note: Everything in the pics are in prototype mode, a tidy up of all brackets, nuts & bolts, cables, earthing etc to be done in warmer weather. :-) [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-band Servo Polarity Mod
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