diff --git a/lasp/device/lasp_cppuldaq.cpp b/lasp/device/lasp_cppuldaq.cpp
index 2d260a2..f92837d 100644
--- a/lasp/device/lasp_cppuldaq.cpp
+++ b/lasp/device/lasp_cppuldaq.cpp
@@ -87,7 +87,9 @@ public:
 
     if (handle == 0) {
       throw runtime_error("Unable to create a handle to the specified DAQ "
-                          "device. Is the device currently in use?");
+          "device. Is the device currently in use? Please make sure to set "
+          "the DAQ configuration in duplex mode if simultaneous input and "
+          "output is required.");
     }
 
     err = ulConnectDaqDevice(handle);
@@ -579,14 +581,14 @@ void fillUlDaqDeviceInfo(vector<DeviceInfo> &devinfolist) {
       devinfo.availableSampleRates.push_back(50400);
       devinfo.availableSampleRates.push_back(51000);
 
-      devinfo.prefSampleRateIndex = 5;
+      devinfo.prefSampleRateIndex = 11;
   
       devinfo.availableFramesPerBlock.push_back(512);
       devinfo.availableFramesPerBlock.push_back(1024);
       devinfo.availableFramesPerBlock.push_back(2048);
       devinfo.availableFramesPerBlock.push_back(4096);
       devinfo.availableFramesPerBlock.push_back(8192);
-      devinfo.prefFramesPerBlockIndex = 1;
+      devinfo.prefFramesPerBlockIndex = 2;
 
       devinfo.availableInputRanges = {1.0, 10.0};
       devinfo.prefInputRangeIndex = 0;