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<p>Hi Michael,</p>
<p>I believe this should work. vex 1.5 will not be able to describe
this properly so you would need to carefully craft the .v2d file
to capture the setup. vex 2.0 (support starting with 2.8.1)
should handle this without special entries in .v2d. To be safe I
would suggest getting your hands on a sample dataset, make two
copies of it, and try correlating one against the other to make
sure the output makes sense.</p>
<p>-Walter<br>
</p>
<div class="moz-cite-prefix">On 5/16/24 06:50, Michael Dutka via
Difx-users wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAKsUxerBrYVwfHhv-EO_ADcs1vZ_Vi1urURuqDiPOVZcb-KbyQ@mail.gmail.com">
<div dir="ltr">Hi All,<br>
We received a message about an upgrade to the digital backend
for Russian geodetic VLBI stations and then describe the
frequency setup like this:<br>
<br>
<ol style="margin-bottom:0in;color:rgb(36,36,36);font-size:15px;margin-top:0in" type="1" start="1">
<li class="gmail-x_p1" style="margin:0in;font-size:8.5pt;font-family:Helvetica"><span style="border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;font-size:11pt;line-height:inherit;font-family:Calibri,sans-serif;font-kerning:inherit;font-feature-settings:inherit;margin:0px;padding:0px;vertical-align:baseline;color:inherit">VDIF
output format (instead of Mark5B+)</span></li>
<li class="gmail-x_p1" style="margin:0in;font-size:8.5pt;font-family:Helvetica"><span style="border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;font-size:11pt;line-height:inherit;font-family:Calibri,sans-serif;font-kerning:inherit;font-feature-settings:inherit;margin:0px;padding:0px;vertical-align:baseline;color:inherit">Each
frequency range has its own VDIF data stream, i.e. for S/X
mode will be two VDIF streams (instead of one like
Mark5B+)</span></li>
<li class="gmail-x_p1" style="margin:0in;font-size:8.5pt;font-family:Helvetica"><span style="border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;font-size:11pt;line-height:inherit;font-family:Calibri,sans-serif;font-kerning:inherit;font-feature-settings:inherit;margin:0px;padding:0px;vertical-align:baseline;color:inherit">The
number of DBBCs used in each frequency range must be a
multiple of 2, i.e. standard geodetic mode will be 8 USB
channels in S and 8 USB or 16 channels (8 USB+ 2 LSB + 6
any) in X (instead of 6 USB in S & 8 USB + 2 LSB in X)</span></li>
</ol>
<div><font face="Calibri, sans-serif" color="#242424"><span style="font-size:14.6667px"><br>
</span></font></div>
<div><font face="Calibri, sans-serif" color="#242424"><span style="font-size:14.6667px">The question is can DiFX
handle this setup? I'm pretty sure the answer is yes (for
the 3rd item we might need to use dummy channels or some
other sort of trick). Does anyone see any glaring issues?</span></font></div>
<br>
<br clear="all">
<div><br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div>Dr. Michael S. Dutka</div>
<div>US Navy (civilian)</div>
<div>USNO Phone Number- 202-762-0242</div>
<div>Cell- 301-996-3588</div>
<div> </div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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