>From bb57da3c718d9f331a132c8489b70e4e5beb4481 Mon Sep 17 00:00:00 2001
From: Sebastian Held <sebastian.held@imst.de>
Date: Tue, 14 Apr 2015 08:07:48 +0200
Subject: [PATCH] added lo_off parameter to tx_waveforms example

---
 host/examples/tx_waveforms.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp
index 7e63326..bac6c28 100644
--- a/host/examples/tx_waveforms.cpp
+++ b/host/examples/tx_waveforms.cpp
@@ -95,7 +95,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args, wave_type, ant, subdev, ref, otw, channel_list;
     size_t spb;
-    double rate, freq, gain, wave_freq, bw;
+    double rate, freq, gain, wave_freq, bw, lo_off;
     float ampl;
 
     //setup the program options
@@ -106,6 +106,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("spb", po::value<size_t>(&spb)->default_value(0), "samples per buffer, 0 for default")
         ("rate", po::value<double>(&rate), "rate of outgoing samples")
         ("freq", po::value<double>(&freq), "RF center frequency in Hz")
+        ("lo_off", po::value<double>(&lo_off), "Offset for frontend LO in Hz (optional)")
         ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of the waveform [0 to 0.7]")
         ("gain", po::value<double>(&gain), "gain for the RF chain")
         ("ant", po::value<std::string>(&ant), "antenna selection")
@@ -172,6 +173,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     for(size_t ch = 0; ch < channel_nums.size(); ch++) {
         std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
         uhd::tune_request_t tune_request(freq);
+        if(vm.count("lo_off")) tune_request = uhd::tune_request_t(freq, lo_off);
+        else tune_request = uhd::tune_request_t(freq);
         if(vm.count("int-n")) tune_request.args = uhd::device_addr_t("mode_n=integer");
         usrp->set_tx_freq(tune_request, channel_nums[ch]);
         std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq(channel_nums[ch])/1e6) << std::endl << std::endl;
-- 
1.9.1