<?xml version="1.0"?> <block> <name>Funcube Dongle Source</name> <key>fcd_source_c</key> <category>Sources</category> <throttle>1</throttle> <import>from gnuradio import fcd</import> <make>fcd.source_c($device_name) #if $lna() != 20.0 self.$(id).set_lna_gain($lna) #end if #if $mixer() != +12.0 self.$(id).set_mixer_gain($mixer) #end if #if $ppm() != 115 self.$(id).set_freq_corr($ppm) #end if #if ($dci() != 0.0) or ($dcq() != 0.0) self.$(id).set_dc_corr($dci,$dcq) #end if #if ($iq_phase() != 0.0) or ($iq_gain() != 1.0) self.$(id).set_iq_corr($iq_gain,$iq_phase) #end if self.$(id).set_freq($freq) </make> <callback>set_freq($freq)</callback> <callback>set_lna_gain($lna)</callback> <callback>set_mixer_gain($mixer)</callback> <callback>set_freq_corr($ppm)</callback> <callback>set_dc_corr($dci,$dcq)</callback> <callback>set_iq_corr($iq_gain,$iq_phase)</callback> <param> <name>Device Name</name> <key>device_name</key> <value>hw:1</value> <type>string</type> <hide>#if $device_name() then 'none' else 'part'#</hide> </param> <param> <name>Frequency (Hz)</name> <key>freq</key> <value>145500000</value> <type>real</type> </param> <param> <name>LNA Gain (dB)</name> <key>lna</key> <value>20.0</value> <type>real</type> </param> <param> <name>Mixer Gain (dB)</name> <key>mixer</key> <value>+12</value> <type>real</type> </param> <param> <name>Frequency corr. (ppm)</name> <key>ppm</key> <value>-120</value> <type>int</type> </param> <param> <name>DC I offset</name> <key>dci</key> <value>0.0</value> <type>real</type> </param> <param> <name>DC Q offset</name> <key>dcq</key> <value>0.0</value> <type>real</type> </param> <param> <name>IQ phase balance</name> <key>iq_phase</key> <value>0.0</value> <type>real</type> </param> <param> <name>IQ gain balance</name> <key>iq_gain</key> <value>1.0</value> <type>real</type> </param> <check>($freq >= 50e6) and ($freq <= 2e9)</check> <check>($dci >= -1.0) and ($dci <= 1.0)</check> <check>($dcq >= -1.0) and ($dcq <= 1.0)</check> <check>($iq_phase >= -1.0) and ($iq_phase <= 1.0)</check> <check>($iq_gain >= -1.0) and ($iq_gain <= 1.0)</check> <source> <name>out</name> <type>complex</type> </source> <doc> This block wraps the Funcube Dongle USB audio input and the USB HID control interface \ into one convenient GNU Radio source block. The sample rate is fixed at 96 ksps. To find the device name on Linux type: cat /proc/asound/cards The LNA gain is a set of discrete values between -5 to 30 dB with 2.5 dB step, but you can \ use any float value and it will be rounded to the nearest valid value. The Mixer gain can be set either to +4 or +12 dB, but you can use any float value \ and it will be rounded to the nearest valid value. The FCD block can autmatically apply frequency correction: - For FCD v1.0 you can leave at -120 ppm - For FCD v1.1 with serial number 810 or greater use -12 ppm The DC offset and IQ balance parameters can have range -1.0 to 1.0. </doc> </block>