try setting sample rate in the device class

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>

+adi/+AD4020/Rx.m

@@ -15,6 +15,13 @@
         channel_names = {'voltage0-voltage1'}
     end
 
+    properties (Nontunable)
+        % SampleRate Sample Rate
+        %   Baseband sampling rate in Hz, specified as a scalar
+        %   in samples per second.
+        SampleRate = '1000000'
+    end
+
     methods
         %% Constructor
         function obj = Rx(varargin)
@@ -23,5 +30,12 @@
             obj.EnabledChannels = 1;
             obj.BufferTypeConversionEnable = true;
         end
+        % Check SamplingRate
+        function set.SampleRate(obj, value)
+            obj.SampleRate = value;
+            if obj.ConnectedToDevice
+                obj.setAttributeRAW('voltage0-voltage1', 'sampling_frequency', num2str(value), false);
+            end
+        end
     end
 end