correct typo DPS to DSP

sohstationviewer/model/reftek/log_info.py

@@ -203,7 +203,7 @@ class LogInfo():
             return False
         return epoch, disk, val
 
-    def read_dps_clock_diff(self, line: str
+    def read_dsp_clock_diff(self, line: str
                             ) -> Union[bool, Tuple[float, float]]:
         """
         Read DPS clock difference
@@ -415,11 +415,11 @@ class LogInfo():
                 if epoch:
                     self.add_chan_info('Jerks/DSP Sets', epoch, 0, idx)
 
-            elif "DPS clock diff" in line:
-                ret = self.read_dps_clock_diff()
+            elif "DSP CLOCK DIFFERENCE" in line:
+                ret = self.read_dsp_clock_diff(line)
                 if ret:
                     epoch, total = ret
-                    self.add_chan_info('DPS Clock Diff', epoch, total, idx)
+                    self.add_chan_info('DSP Clock Diff', epoch, total, idx)
 
             elif "ACQUISITION STARTED" in line:
                 epoch = self.simple_read(line)[1]