&gt; You can find a picture of what I&#39;m looking at here:<br />&gt; http://thre.at/c139/c139rxfilters.jpg .  I&#39;ve placed the c139 schematics<br />&gt; in that directory as well, http://thre.at/c139 .<br /><br />As a side note, you should use the quadband branch (soon to be merged)  and replace  (in board/compal/rffe_dualband.c)<br /><br />uint32_t rffe_get_rx_ports(void)<br />{<br />        return (1 &lt;&lt; PORT_LO) | (1 &lt;&lt; PORT_DCS1800);<br />}<br /><br />by<br /><br />uint32_t rffe_get_rx_ports(void)<br />{<br />        return (1 &lt;&lt; PORT_LO) | (1 &lt;&lt; PORT_PCS1900);<br />}<br /><br />because the hi band input is plugged to the PCS port of rita and not DCS port.<br /><br />Cheers,<br /><br />    Sylvain