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@@ -119,6 +119,62 @@ is designed to compensate for the gravitational deformations of the whole surfac 
</div>

<div class="section" id="receivers">

<h1>Receivers<a class="headerlink" href="#receivers" title="Permalink to this headline"></a></h1>

<p>In the current call for proposals, the following receivers and configurations are available:</p>

<table border="1" class="docutils">

<colgroup>

<col width="12%" />

<col width="10%" />

<col width="14%" />

<col width="12%" />

<col width="14%" />

<col width="12%" />

<col width="26%" />

</colgroup>

<thead valign="bottom">

<tr class="row-odd"><th class="head">RF band (GHz)</th>

<th class="head">Type</th>

<th class="head">Offered for</th>

<th class="head">Tsys&#64;90degEL(K)</th>

<th class="head">Beamsize (arcmin)</th>

<th class="head">Max gain (K/Jy)</th>

<th class="head">connected backends</th>

</tr>

</thead>

<tbody valign="top">

<tr class="row-even"><td>P 0.30-0.36</td>

<td>single-feed</td>

<td>VLBI, single-dish</td>

<td>50-80</td>

<td>48</td>

<td>0.52</td>

<td>DBBC,ROACH1</td>

</tr>

<tr class="row-odd"><td>L 1.3-1.8</td>

<td>single-feed</td>

<td>VLBI, single-dish</td>

<td>25-35</td>

<td>11.4</td>

<td>0.55</td>

<td>TP,DFB,DBBC,ROACH1,SARDARA</td>

</tr>

<tr class="row-even"><td>C-high 5.7-7.7</td>

<td>single-feed</td>

<td>VLBI, single-dish</td>

<td>32-37</td>

<td>2.7</td>

<td>0.60</td>

<td>TP,DFB,DBBC,ROACH1,SARDARA,XARCOS</td>

</tr>

<tr class="row-odd"><td>K 18-26.5</td>

<td>7-feed</td>

<td>VLBI, single-dish</td>

<td>90</td>

<td>0.8</td>

<td>0.45-0.65</td>

<td>TP,DFB,DBBC,ROACH1,SARDARA,XARCOS</td>

</tr>

</tbody>

</table>

<ul class="simple">

<li>The single-feed, L-P band dual-frequency receiver was installed at the primary focus of the telescope, and therefore requires the parabolic configuration. It allows for simultaneous observations at L and P bands. The polarization type is linear but is also transformed to circular thanks to a hybrid converter.</li>

<li>A single-feed C-high band receiver is installed at the Beam Wave Guide (BWG) focus of the telescope. The polarization type is circular.</li>
@@ -260,16 +316,6 @@ is the <em>WIDE</em> filter (460 MHz of bandwidth).</p> 
<td>2000</td>

<td>1 – 1000</td>

</tr>

<tr class="row-odd"><td>P-band</td>

<td>2</td>

<td>680</td>

<td>1 – 1000</td>

</tr>

<tr class="row-even"><td>L-P dual</td>

<td>4</td>

<td>2000</td>

<td>1 – 1000</td>

</tr>

</tbody>

</table>

</div>
@@ -289,9 +335,11 @@ The observer can select the following configurations:</p> 
<a class="reference external" href="http://www.oa-cagliari.inaf.it/download.php?id_file=YQ9rg6JYb9mniCarnPrkZ6SZIvrwI1S%2FVGL58uBsIkX36r28s%2FDbSXyE0smKJiWa5FCsB7mRWR5SOZaxg83MVg%3D%3D">Melis et al., OAC Internal report N. 52</a>.</p>

<p>It is worth noting that, given a particular configuration (e.g. XK00), the sections are obtained simultaneously. For each section, the bandwidth and

starting frequency can then be set. For more information about this procedure, see <a class="reference external" href="https://discos.readthedocs.io/en/latest/user/srt/source/Backend.html#xarcos">XARCOS</a>.</p>

<p>Notes:

* XARCOS has been tested in circular polarization. Linear polarization observations are also admitted but in shared-risk mode. The full-Stokes configuration is therefore in shared-risk mode. Please contact the antenna staff.

* At C-band, standing waves have been identified that affect observations for Tcontinuum/Tsys &gt; 0.05 (value to be confirmed).</p>

<p>Notes:</p>

<ul class="simple">

<li>XARCOS has been tested in circular polarization. Linear polarization observations are also admitted but in shared-risk mode. The full-Stokes configuration is therefore in shared-risk mode. Please contact the antenna staff.</li>

<li>At C-band, standing waves have been identified that affect observations for Tcontinuum/Tsys &gt; 0.05 (value to be confirmed).</li>

</ul>

</div>

<div class="section" id="digital-base-band-converter-dbbc">

<h2>Digital Base Band Converter (DBBC)<a class="headerlink" href="#digital-base-band-converter-dbbc" title="Permalink to this headline"></a></h2>

antenna.rst

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Original line number Diff line number Diff line
@@ -74,6 +74,17 @@ The shaped configuration is used for receivers in the Gregorian and BWG foci, wh 
Receivers

=========



In the current call for proposals, the following receivers and configurations are available:



=============== ============= ================= =============== ================= =============== =================================

RF band (GHz)       Type      Offered for       Tsys@90degEL(K) Beamsize (arcmin) Max gain (K/Jy) connected backends

=============== ============= ================= =============== ================= =============== =================================

P 0.30-0.36     single-feed   VLBI, single-dish   50-80             48                 0.52        DBBC,ROACH1

L 1.3-1.8       single-feed   VLBI, single-dish   25-35             11.4               0.55       TP,DFB,DBBC,ROACH1,SARDARA

C-high 5.7-7.7  single-feed   VLBI, single-dish   32-37             2.7                0.60       TP,DFB,DBBC,ROACH1,SARDARA,XARCOS

K 18-26.5        7-feed       VLBI, single-dish   90                0.8              0.45-0.65    TP,DFB,DBBC,ROACH1,SARDARA,XARCOS 

=============== ============= ================= =============== ================= =============== =================================



* The single-feed, L-P band dual-frequency receiver was installed at the primary focus of the telescope, and therefore requires the parabolic configuration. It allows for simultaneous observations at L and P bands. The polarization type is linear but is also transformed to circular thanks to a hybrid converter. 



* A single-feed C-high band receiver is installed at the Beam Wave Guide (BWG) focus of the telescope. The polarization type is circular.
@@ -148,8 +159,6 @@ Receiver Sections Filters (MHz) Sampling time (ms) 
K-band     14     250,680,1200,2000      1 -- 1000

C-band      2     250,680,1200,2000      1 -- 1000

L-band      2     2000                   1 -- 1000

P-band      2     680                    1 -- 1000

L-P dual    4     2000                   1 -- 1000 

======== ======== ====================== ==================



XARCOS
@@ -173,7 +182,9 @@ It is worth noting that, given a particular configuration (e.g. XK00), the secti 
starting frequency can then be set. For more information about this procedure, see `XARCOS <https://discos.readthedocs.io/en/latest/user/srt/source/Backend.html#xarcos>`_.



Notes:



* XARCOS has been tested in circular polarization. Linear polarization observations are also admitted but in shared-risk mode. The full-Stokes configuration is therefore in shared-risk mode. Please contact the antenna staff.



* At C-band, standing waves have been identified that affect observations for Tcontinuum/Tsys > 0.05 (value to be confirmed).