<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">There is no difference but at least 3dB loss for GPS signal that has no noticeable adverse effect on GPSDO performance<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 27, 2017 at 5:13 PM, Hojoon Yang via USRP-users <span dir="ltr"><<a href="mailto:usrp-users@lists.ettus.com" target="_blank">usrp-users@lists.ettus.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">Hi.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">I have two USRP B200 and each USRP is equipped with GPSDO. Also, I have one 5v active GPS antenna, and one power divider(1 input and 2 outputs) whose operation frequency is 0.7~2.7GHz.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">In power divider, the input port is connected to the GPS antenna and each output port is connected to a different GPS ANT port on the USRP B200.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"><span style="font-size:11pt;font-family:돋움;line-height:17.6px;margin-top:0px;margin-bottom:0px"><br></span></p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">I want two USRP B200 to receive GPS signal from only one antenna. That's why I use power divider.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">So, I wonder this configuration works well compared to two GPS antenna configuration (i.e. each USRP are connected to their own GPS antenna).</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">Is there "any" dis-advantage compared to two antenna config?</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">I tested it and observed that both USRP's GPS ANT LED was "green" and seems to work but not sure. I executed the sync_to_gps program for both USRP and it worked well.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">Thanks.</p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px"> </p><p style="font-family:돋움;font-size:14.6667px;line-height:17.6px;margin-top:0px;margin-bottom:0px">Regards,</p>

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