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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Increasing the Hughes LNB oscillator range
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<blockquote data-quote="Terryl" data-source="post: 898127" data-attributes="member: 369937"><p>The small can is not so much to keep it on freq, but to keep the DRO from emitting or going into some nasty spurious oscillations.</p><p></p><p>If the DRO unit has a spur on it's output it could cause some nasty interference at some other frequency outside of what your looking at.</p><p></p><p>A sign of a spurious oscillation would be a drop in the output level, or someone from a local frequency co-ordination office showing up at your door with a quit and decease order.</p><p></p><p>It is best to check with a spectrum analyzer for any problems when pushing the range of a microwave oscillator outside of is design.</p><p></p><p>Back in the old days we had lots of problems with the oscillators just going out of spec by them selves, you would note a drop in the RSSI, or the FCC knocking at your door.</p><p></p><p>I had a 7 GHz TV microwave act up due to a spur and cause a big problem on a 21 GHz military channel, needless to say, SAC was not happy.</p></blockquote><p></p>
[QUOTE="Terryl, post: 898127, member: 369937"] The small can is not so much to keep it on freq, but to keep the DRO from emitting or going into some nasty spurious oscillations. If the DRO unit has a spur on it's output it could cause some nasty interference at some other frequency outside of what your looking at. A sign of a spurious oscillation would be a drop in the output level, or someone from a local frequency co-ordination office showing up at your door with a quit and decease order. It is best to check with a spectrum analyzer for any problems when pushing the range of a microwave oscillator outside of is design. Back in the old days we had lots of problems with the oscillators just going out of spec by them selves, you would note a drop in the RSSI, or the FCC knocking at your door. I had a 7 GHz TV microwave act up due to a spur and cause a big problem on a 21 GHz military channel, needless to say, SAC was not happy. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Increasing the Hughes LNB oscillator range
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