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Satellite PC Card Receivers, Internet by Satellite
Using TBS6983/6903 Below 900MHz (STV6120)
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<blockquote data-quote="tom55" data-source="post: 1136039" data-attributes="member: 417964"><p>I suppose the actual cause of these responses has not been identified?</p><p>While thinking about it, it occured to me, maybe there is a tuner chip exhibiting this issue that has the possibility to power gate unused VCO.</p><p>I think manufacturers set these up to be constantly on, even when unused, probably to speed up channel switching time.</p><p></p><p>I will add that i put 2x4 voltage controlled multiswitch (high pass cutoff at 900mhz), it dampened low band, and all the responses from high band got SNR bump from 3-5dB to >15dB</p><p>That's how i was able to lock transponders on these harmonics and confirm the services match those at 3x IF</p></blockquote><p></p>
[QUOTE="tom55, post: 1136039, member: 417964"] I suppose the actual cause of these responses has not been identified? While thinking about it, it occured to me, maybe there is a tuner chip exhibiting this issue that has the possibility to power gate unused VCO. I think manufacturers set these up to be constantly on, even when unused, probably to speed up channel switching time. I will add that i put 2x4 voltage controlled multiswitch (high pass cutoff at 900mhz), it dampened low band, and all the responses from high band got SNR bump from 3-5dB to >15dB That's how i was able to lock transponders on these harmonics and confirm the services match those at 3x IF [/QUOTE]
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Satellite PC Card Receivers, Internet by Satellite
Using TBS6983/6903 Below 900MHz (STV6120)
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