diff --git a/src/algorithms/signal_generator/adapters/signal_generator.cc b/src/algorithms/signal_generator/adapters/signal_generator.cc
index affa75705..e6fffa3e1 100644
--- a/src/algorithms/signal_generator/adapters/signal_generator.cc
+++ b/src/algorithms/signal_generator/adapters/signal_generator.cc
@@ -36,6 +36,7 @@
 #include "Galileo_E1.h"
 #include "GPS_L1_CA.h"
 #include "Galileo_E5a.h"
+#include "Glonass_L1_CA.h"
 
 
 using google::LogMessage;
@@ -102,6 +103,11 @@ SignalGenerator::SignalGenerator(ConfigurationInterface* configuration,
             vector_length = round((float)fs_in
                     / (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS));
         }
+    else if (std::find(system.begin(), system.end(), "R") != system.end())
+        {
+            vector_length = round((float)fs_in
+                    / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS));
+        }
 
     if (item_type_.compare("gr_complex") == 0)
         {
diff --git a/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc b/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
index c9a3576fc..5f1b5b0ae 100644
--- a/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
+++ b/src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
@@ -294,8 +294,8 @@ int signal_generator_c::general_work (int noutput_items __attribute__((unused)),
     unsigned int out_idx = 0;
     unsigned int i = 0;
     unsigned int k = 0;
-    // the intermediate frequency must set by the user
-    unsigned int freq = 9540000;
+    // the intermediate frequency must be set by the user
+    unsigned int freq = 4e6;
 
     for (out_idx = 0; out_idx < vector_length_; out_idx++)
         {