diff --git a/user_space/side_ch_ctl_src/iq_capture.py b/user_space/side_ch_ctl_src/iq_capture.py
index e8bdb89..85d0f1a 100755
--- a/user_space/side_ch_ctl_src/iq_capture.py
+++ b/user_space/side_ch_ctl_src/iq_capture.py
@@ -56,8 +56,8 @@ def parse_iq(iq, iq_len):
     
     timestamp = iq[:,0] + pow(2,16)*iq[:,1] + pow(2,32)*iq[:,2] + pow(2,48)*iq[:,3]
     iq_capture = np.int16(iq[:,4::4]) + np.int16(iq[:,5::4])*1j
-    agc_gain = iq[:,6::4]
-    rssi_half_db = iq[:,7::4]
+    agc_gain = np.bitwise_and(iq[:,6::4], np.uint16(0xFF))
+    rssi_half_db = np.bitwise_and(iq[:,7::4], np.uint16(0x7FF))
     # print(num_trans, iq_len, iq_capture.shape, agc_gain.shape, rssi_half_db.shape)
 
     iq_capture = iq_capture.reshape([num_trans*iq_len,])
diff --git a/user_space/side_ch_ctl_src/test_iq_file_display.m b/user_space/side_ch_ctl_src/test_iq_file_display.m
index 0ac4e55..9a70f40 100644
--- a/user_space/side_ch_ctl_src/test_iq_file_display.m
+++ b/user_space/side_ch_ctl_src/test_iq_file_display.m
@@ -37,8 +37,10 @@ for i=1:num_iq_capture
     ep = i*num_data_in_each_iq_capture;
     timestamp(i) = double(b(sp,1)) + (2^16)*double(b(sp,2)) + (2^32)*double(b(sp,3)) + (2^48)*double(b(sp,4));
     iq_capture(:,i) = double(typecast(b((sp+1):ep,1),'int16')) + 1i.*double(typecast(b((sp+1):ep,2),'int16'));
-    agc_gain(:,i) = double(b((sp+1):ep,3));
-    rssi_half_db(:,i) = double(b((sp+1):ep,4));
+    // agc_gain(:,i) = double(b((sp+1):ep,3));
+    agc_gain(:,i) = double(bitand(b((sp+1):ep,3), uint16(255)));
+    // rssi_half_db(:,i) = double(b((sp+1):ep,4));
+    rssi_half_db(:,i) = double(bitand(b((sp+1):ep,4), uint16(2047)));
 end
 save(['iq_' num2str(iq_len) '.mat'], 'iq_capture');