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<blockquote data-quote="s-band" data-source="post: 1031838" data-attributes="member: 407744">Hi Tony, The 2 strong horizontal CW signals have been reported by a many. I have convinced myself the the vertical one 6kHz above 17894.75H is real since;<ul>
<li data-xf-list-type="ul">As far as I can tell , they peak at the same point in the sky. It could be from another position but I can't find it elsewhere. I'm only using a 1.2m so the angular resolution is limited.</li>
<li data-xf-list-type="ul">They are present on 2 different receivers, an HP analyser and an SDR</li>
<li data-xf-list-type="ul">I can't see any strong vertical signals that might cause a spurious (that's not to say that there is not one out of band, but it still has to be from the same position).</li>
<li data-xf-list-type="ul">I can null the H one to peak the V and vice versa. The feed skews look orthogonal. The plots are in an effective BW of ~3Hz hence nearly 60dB SNR on the H one.&nbsp; The frequencies on the plots are a bit out as I did not re-calibrate this morning and the reference in the LNB wanders a bit.</li>
<li data-xf-list-type="ul">[ATTACH]111968[/ATTACH] [ATTACH]111969[/ATTACH]</li>
</ul>Can you look, using vertical pol, 6kHz above the H carrier in &lt;&lt;1kHz, please?The VSAT feeds I'm using are simple ones and don't have the filters included. There were chokes and filters in the ODU so the only filter left is the microstrip one in the LNB. The circular polariser has been removed. I've got another WG adapter so I can try the Viasat feed which should be matched to the dish. I've made feeds for X band but Ka is more fiddly;-)Back to the thread title, The GS on 18561V seems very stable in level (12-13dB SNR) but the ITN ones vary a lot. At the moment 18515 &amp; 18557 are both about 7dB SNR but 18557 has peaked 12dB over the past few days.</blockquote>

[QUOTE="s-band, post: 1031838, member: 407744"] Hi Tony, The 2 strong horizontal CW signals have been reported by a many. I have convinced myself the the vertical one 6kHz above 17894.75H is real since; [LIST] [*]As far as I can tell , they peak at the same point in the sky. It could be from another position but I can't find it elsewhere. I'm only using a 1.2m so the angular resolution is limited. [*]They are present on 2 different receivers, an HP analyser and an SDR [*]I can't see any strong vertical signals that might cause a spurious (that's not to say that there is not one out of band, but it still has to be from the same position). [*]I can null the H one to peak the V and vice versa. The feed skews look orthogonal. The plots are in an effective BW of ~3Hz hence nearly 60dB SNR on the H one. The frequencies on the plots are a bit out as I did not re-calibrate this morning and the reference in the LNB wanders a bit. [*][ATTACH]111968[/ATTACH] [ATTACH]111969[/ATTACH] [/LIST] Can you look, using vertical pol, 6kHz above the H carrier in <<1kHz, please? The VSAT feeds I'm using are simple ones and don't have the filters included. There were chokes and filters in the ODU so the only filter left is the microstrip one in the LNB. The circular polariser has been removed. I've got another WG adapter so I can try the Viasat feed which should be matched to the dish. I've made feeds for X band but Ka is more fiddly;-) Back to the thread title, The GS on 18561V seems very stable in level (12-13dB SNR) but the ITN ones vary a lot. At the moment 18515 & 18557 are both about 7dB SNR but 18557 has peaked 12dB over the past few days. [/QUOTE]

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