diff --git a/doc/examples/minghe/ex_minghe_mhs5200.py b/doc/examples/minghe/ex_minghe_mhs5200.py
index 55f929875..60b69bedb 100644
--- a/doc/examples/minghe/ex_minghe_mhs5200.py
+++ b/doc/examples/minghe/ex_minghe_mhs5200.py
@@ -7,12 +7,22 @@
 mhs.channel[0].frequency = 3000000*pq.Hz
 print(mhs.channel[0].frequency)
 mhs.channel[0].function = MHS5200.Function.sawtooth_down
-print(mhs.channel[0].wave_type)
-mhs.channel[0].amplitude[0] = 9.0*pq.V
+print(mhs.channel[0].function)
+mhs.channel[0].amplitude = 9.0*pq.V
 print(mhs.channel[0].amplitude)
 mhs.channel[0].offset = -0.5
 print(mhs.channel[0].offset)
 mhs.channel[0].phase = 90
 print(mhs.channel[0].phase)
 
-mhs.channel[1].wave_type = MHS5200.Function.sawtooth_up
+mhs.channel[1].frequency = 2000000*pq.Hz
+print(mhs.channel[1].frequency)
+mhs.channel[1].function = MHS5200.Function.square
+print(mhs.channel[1].function)
+mhs.channel[1].amplitude = 2.0*pq.V
+print(mhs.channel[1].amplitude)
+mhs.channel[1].offset = 0.0
+print(mhs.channel[1].offset)
+mhs.channel[1].phase = 15
+print(mhs.channel[1].phase)
+
diff --git a/instruments/minghe/mhs5200a.py b/instruments/minghe/mhs5200a.py
index b64c31473..1f2c035e2 100644
--- a/instruments/minghe/mhs5200a.py
+++ b/instruments/minghe/mhs5200a.py
@@ -32,6 +32,14 @@ class MHS5200(Instrument):
     def __init__(self, filelike):
         super(MHS5200, self).__init__(filelike)
         self._channel_count = 2
+        self.terminator = "\r\n"
+
+    def _ack_expected(self, msg=""):
+        if msg.find(":r") == 0:
+            return None
+        else:
+            # most commands res
+            return "ok"
 
     # INNER CLASSES #
 
diff --git a/instruments/tests/test_minghe/test_minghe_mhs5200a.py b/instruments/tests/test_minghe/test_minghe_mhs5200a.py
index cd7632fab..34dc2e3e8 100644
--- a/instruments/tests/test_minghe/test_minghe_mhs5200a.py
+++ b/instruments/tests/test_minghe/test_minghe_mhs5200a.py
@@ -33,7 +33,7 @@ def test_mhs_amplitude():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].amplitude[0] == 3.3*pq.V
         assert mhs.channel[1].amplitude[0] == 5.0*pq.V
@@ -51,7 +51,7 @@ def test_mhs_amplitude_dbm_notimplemented():
         [
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         mhs.channel[0].amplitude = 6.6*ik.units.dBm
 
@@ -72,7 +72,7 @@ def test_mhs_duty_cycle():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].duty_cycle == 330.0*pq.s
         assert mhs.channel[1].duty_cycle == 500.0*pq.s
@@ -95,7 +95,7 @@ def test_mhs_enable():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].enable
         assert not mhs.channel[1].enable
@@ -119,7 +119,7 @@ def test_mhs_frequency():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].frequency == 33.0*pq.kHz
         assert mhs.channel[1].frequency == 500.0*pq.kHz
@@ -143,7 +143,7 @@ def test_mhs_offset():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].offset == 0
         assert mhs.channel[1].offset == -1.2
@@ -167,7 +167,7 @@ def test_mhs_phase():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].phase == 120
         assert mhs.channel[1].phase == 0
@@ -191,7 +191,7 @@ def test_mhs_wave_type():
             "ok",
             "ok"
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.channel[0].function == mhs.Function.sine
         assert mhs.channel[1].function == mhs.Function.square
@@ -209,6 +209,6 @@ def test_mhs_serial_number():
         [
             ":r0c5225A1",
         ],
-        sep="\n"
+        sep="\r\n"
     ) as mhs:
         assert mhs.serial_number == "5225A1"
\ No newline at end of file