1 files changed, 7 insertions, 2 deletions
diff --git a/host/examples/rx_samples_to_file.cpp b/host/examples/rx_samples_to_file.cpp
index 941e5eb65..444fd155c 100644
--- a/host/examples/rx_samples_to_file.cpp
+++ b/host/examples/rx_samples_to_file.cpp
@@ -37,6 +37,7 @@ template<typename samp_type> void recv_to_file(
     uhd::usrp::multi_usrp::sptr usrp,
     const std::string &cpu_format,
     const std::string &wire_format,
+    const std::string &channel,
     const std::string &file,
     size_t samps_per_buff,
     unsigned long long num_requested_samples,
@@ -50,6 +51,9 @@ template<typename samp_type> void recv_to_file(
     unsigned long long num_total_samps = 0;
     //create a receive streamer
     uhd::stream_args_t stream_args(cpu_format,wire_format);
+    std::vector<size_t> channel_nums;
+    channel_nums.push_back(boost::lexical_cast<size_t>(channel));
+    stream_args.channels = channel_nums;
     uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
 
     uhd::rx_metadata_t md;
@@ -209,7 +213,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     uhd::set_thread_priority_safe();
 
     //variables to be set by po
-    std::string args, file, type, ant, subdev, ref, wirefmt;
+    std::string args, file, type, ant, subdev, ref, wirefmt, channel;
     size_t total_num_samps, spb;
     double rate, freq, gain, bw, total_time, setup_time;
 
@@ -229,6 +233,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("gain", po::value<double>(&gain), "gain for the RF chain")
         ("ant", po::value<std::string>(&ant), "antenna selection")
         ("subdev", po::value<std::string>(&subdev), "subdevice specification")
+        ("channel", po::value<std::string>(&channel)->default_value("0"), "which channel to use")
         ("bw", po::value<double>(&bw), "analog frontend filter bandwidth in Hz")
         ("ref", po::value<std::string>(&ref)->default_value("internal"), "reference source (internal, external, mimo)")
         ("wirefmt", po::value<std::string>(&wirefmt)->default_value("sc16"), "wire format (sc8, sc16 or s16)")
@@ -329,7 +334,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     }
 
 #define recv_to_file_args(format) \
-    (usrp, format, wirefmt, file, spb, total_num_samps, total_time, bw_summary, stats, null, enable_size_map, continue_on_bad_packet)
+    (usrp, format, wirefmt, channel, file, spb, total_num_samps, total_time, bw_summary, stats, null, enable_size_map, continue_on_bad_packet)
     //recv to file
     if (wirefmt == "s16") {
         if (type == "double") recv_to_file<double>recv_to_file_args("f64");