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DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Titanium PLL C Band LNBs
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<blockquote data-quote="s-band" data-source="post: 963940" data-attributes="member: 407744"><p>Reference Harmonics</p><p>I have been looking at the performance of these as I (and others) noticed that they exhibit some strange behaviour. I hope to look at NF & polarisation (unless anyone else has?) but attached are some plots showing harmonics of the 25MHz reference present in the output. In addition to that, although I can’t nail it down, the noise output looks spikey at times. Some notes:</p><p>-The noise floor on the plots is a few dB higher than you would see on a dish as the LNBF was looking at absorber at room temperature.</p><p>-I tried absorber & shielding around the oscillator which had little effect.</p><p>-Probing the thing I could not find high levels of harmonics near the chip. Measurements were swamped by the output signal (inc its spurs)</p><p>-At these levels, the spurs might not have much effect on TV but would if they hit a narrow band signal.</p><p></p><p>Lite Version</p><p>Because I chopped the scalar ring of my C1W-PLL, I bought a lite version, for its ring, thinking it would be a de-selected model of the same. However, the lite is different in some respects (see pics).</p><p>Other differences Lite vs non-lite:</p><p>-NE3503M04 vs. NE3512S02 front end</p><p>-something else vs. NE3503M04 2nd stage</p><p>-Different body casting</p><p>-Scalar rings deeper on Lite (and f/d calibrations different on body)</p><p>-Noise o/p ~10-20dB higher on lite (gain/NF not measured)</p><p>-25MHz spurs similar levels but different structure.</p><p>I'll try and do a comparison on-air some time.</p><p></p><p>One thing to note, as Osmocom point out, there are unused screw holes in the C1W-PLL which could allow water to get in. Probably not a problem for PF but for offset dishes water may run down the feed.</p><p></p><p>The titaniums are amazing value compared to my 1st LNBs from 20 years ago. I’ve spent long enough for now but may add more some time.</p><p></p><p></p><p>Links:</p><p><a href="https://www.satellites.co.uk/search/2795314/?q=titanium+c+band&o=date" target="_blank">Search Results for Query: titanium c band | Satellite & Digital TV Support forums</a></p><p><a href="http://www.titaniumsatellite.com" target="_blank">Titanium Satellite - Sales / Design / Development / Distribution /Customer Support</a></p><p><a href="http://projects.osmocom.org/projects/miscellaneous-projects/wiki/C_Band_LNB_Ext_Ref_Mod" target="_blank">C Band LNB Ext Ref Mod - Miscellaneous Projects - Osmocom - Open Source Mobile Communications</a></p><p><a href="http://www.earf.co.uk/ocxolnb.html" target="_blank">page</a></p><p><a href="http://www.renesas.eu/products/microwave/transistor/low_gaashj/device/NE3503M04.jsp" target="_blank">NE3503M04 | Renesas Electronics Europe</a></p><p><a href="http://www.renesas.com/products/microwave/transistor/low_gaashj/device/NE3512S02.jsp" target="_blank">NE3512S02 | Renesas Electronics</a></p><p>[ATTACH]91329[/ATTACH] [ATTACH]91330[/ATTACH] [ATTACH]91331[/ATTACH] [ATTACH]91332[/ATTACH] [ATTACH]91333[/ATTACH] [ATTACH]91334[/ATTACH] [ATTACH]91335[/ATTACH] [ATTACH]91336[/ATTACH] [ATTACH]91337[/ATTACH]</p></blockquote><p></p>
[QUOTE="s-band, post: 963940, member: 407744"] Reference Harmonics I have been looking at the performance of these as I (and others) noticed that they exhibit some strange behaviour. I hope to look at NF & polarisation (unless anyone else has?) but attached are some plots showing harmonics of the 25MHz reference present in the output. In addition to that, although I can’t nail it down, the noise output looks spikey at times. Some notes: -The noise floor on the plots is a few dB higher than you would see on a dish as the LNBF was looking at absorber at room temperature. -I tried absorber & shielding around the oscillator which had little effect. -Probing the thing I could not find high levels of harmonics near the chip. Measurements were swamped by the output signal (inc its spurs) -At these levels, the spurs might not have much effect on TV but would if they hit a narrow band signal. Lite Version Because I chopped the scalar ring of my C1W-PLL, I bought a lite version, for its ring, thinking it would be a de-selected model of the same. However, the lite is different in some respects (see pics). Other differences Lite vs non-lite: -NE3503M04 vs. NE3512S02 front end -something else vs. NE3503M04 2nd stage -Different body casting -Scalar rings deeper on Lite (and f/d calibrations different on body) -Noise o/p ~10-20dB higher on lite (gain/NF not measured) -25MHz spurs similar levels but different structure. I'll try and do a comparison on-air some time. One thing to note, as Osmocom point out, there are unused screw holes in the C1W-PLL which could allow water to get in. Probably not a problem for PF but for offset dishes water may run down the feed. The titaniums are amazing value compared to my 1st LNBs from 20 years ago. I’ve spent long enough for now but may add more some time. Links: [URL='https://www.satellites.co.uk/search/2795314/?q=titanium+c+band&o=date']Search Results for Query: titanium c band | Satellite & Digital TV Support forums[/URL] [URL='http://www.titaniumsatellite.com']Titanium Satellite - Sales / Design / Development / Distribution /Customer Support[/URL] [URL='http://projects.osmocom.org/projects/miscellaneous-projects/wiki/C_Band_LNB_Ext_Ref_Mod']C Band LNB Ext Ref Mod - Miscellaneous Projects - Osmocom - Open Source Mobile Communications[/URL] [URL='http://www.earf.co.uk/ocxolnb.html']page[/URL] [URL='http://www.renesas.eu/products/microwave/transistor/low_gaashj/device/NE3503M04.jsp']NE3503M04 | Renesas Electronics Europe[/URL] [URL='http://www.renesas.com/products/microwave/transistor/low_gaashj/device/NE3512S02.jsp']NE3512S02 | Renesas Electronics[/URL] [ATTACH]91329[/ATTACH] [ATTACH]91330[/ATTACH] [ATTACH]91331[/ATTACH] [ATTACH]91332[/ATTACH] [ATTACH]91333[/ATTACH] [ATTACH]91334[/ATTACH] [ATTACH]91335[/ATTACH] [ATTACH]91336[/ATTACH] [ATTACH]91337[/ATTACH] [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
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Titanium PLL C Band LNBs
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