Index: tests/peter/test_calibration.py
===================================================================
diff -u -rbfb0c47181dc8a73d09825ab697a7799dd520417 -r46ebf93d3666db40f25ad1e9170426853aa845d4
--- tests/peter/test_calibration.py	(.../test_calibration.py)	(revision bfb0c47181dc8a73d09825ab697a7799dd520417)
+++ tests/peter/test_calibration.py	(.../test_calibration.py)	(revision 46ebf93d3666db40f25ad1e9170426853aa845d4)
@@ -1,3 +1,6 @@
+import copy
+import pprint
+import subprocess
 import sys
 import struct
 
@@ -10,6 +13,7 @@
 
 
 def process_calibration_record(read=False):
+    dg = DG()
 
     cal = dg.calibration_record
     print(cal.tmp_record)
@@ -74,6 +78,7 @@
     except KeyboardInterrupt:
         pass
 
+
 def test_crc():
     val = NVOpsUtils.crc_16(b''.join([
         struct.pack("<f", 0.0),
@@ -85,12 +90,56 @@
     ]))
     print(val)
     val = NVOpsUtils.crc_16(b''.join([
+        struct.pack("<f", 1.0), # fourth order
+        struct.pack("<f", 1.0), # third order
+        struct.pack("<f", 1.0), # second order
+        struct.pack("<f", 1.0), # gain
+        struct.pack("<f", 0.0), # offset
+        struct.pack("<i", 0), # cal_time
+    ]))
+    print(val)
+    """
+     OrderedDict([('ppi',
+                            {'cal_time': ['<i', 0],
+                             'crc': ['<H', 26600],
+                             'fourth_order': ['<f', 0.0],
+                             'gain': ['<f', 1.0],
+                             'offset': ['<f', 0.0],
+                             'second_order': ['<f', 0.0],
+                             'third_order': ['<f', 0.0]}),
+                           ('ppo',
+                            {'cal_time': ['<i', 0],
+                             'crc': ['<H', 26600],
+                             'fourth_order': ['<f', 0.0],
+                             'gain': ['<f', 1.0],
+                             'offset': ['<f', 0.0],
+                             'second_order': ['<f', 0.0],
+                             'third_order': ['<f', 0.0]}),
+    """
+    val = NVOpsUtils.crc_16(b''.join([
+        struct.pack("<f", 1.0),
+        struct.pack("<f", 1.0),
+        struct.pack("<f", 0),
+        struct.pack("<f", 0),
+        struct.pack("<i", 0), # calibration time
+    ]))
+    print(val)
+    val = NVOpsUtils.crc_16(b''.join([
+        struct.pack("<f", 1.0),
+        struct.pack("<f", 0),
+        struct.pack("<f", 0),
+        struct.pack("<f", 1.0),
+        struct.pack("<f", 0),
+        struct.pack("<i", 0),  # cal_time
+    ]))
+    print(val)
+    val = NVOpsUtils.crc_16(b''.join([
         struct.pack("<f", float("nan")),
         struct.pack("<f", float("nan")),
         struct.pack("<f", float("nan")),
         struct.pack("<f", float("nan")),
         struct.pack("<f", float("nan")),
-        struct.pack("<i", -1),
+        struct.pack("<i", -1),  # cal_time
     ]))
     print(val)
 
@@ -116,10 +165,40 @@
 
         print(dg.dg_version)
         print(dg.fpga_version)
+        # store the old record after reading it from fw
+        record_old_formatted = pprint.pformat(dg.calibration_record.dg_calibration_record, indent=4)
+        with open("/tmp/dialin_test_record_old.txt", 'w') as f:
+            f.write(record_old_formatted)
+        prev_value = dg.calibration_record.dg_calibration_record["pressure_sensors"]["ppi"]["fourth_order"][1]
+        print("Old Record setting: {0}".format(dg.calibration_record.dg_calibration_record["pressure_sensors"]["ppi"]["fourth_order"][1]))
 
+        # update the old record
+        if prev_value == 1:
+            new_value = 0.0
+        else:
+            new_value = 1.0
+
+        dg.calibration_record.dg_calibration_record["pressure_sensors"]["ppi"]["fourth_order"][1] = new_value
+        print("New record setting: {0}".format(dg.calibration_record.dg_calibration_record["pressure_sensors"]["ppi"]["fourth_order"][1]))
+
         dg.calibration_record.cmd_set_dg_calibration_record(dg.calibration_record.dg_calibration_record)
 
+        dg.calibration_record.cmd_request_dg_calibration_record()
+        observer.received = False
+        while not observer.received:
+            sleep(0.2)
 
+        # check that the old record is different from the new record
+        print("New record setting: {0}".format(dg.calibration_record.dg_calibration_record["pressure_sensors"]["ppi"]["fourth_order"][1]))
+
+        new_record_read = copy.deepcopy(dg.calibration_record.dg_calibration_record)
+        record_new_formatted = pprint.pformat(new_record_read, indent=4)
+        with open("/tmp/dialin_test_record_new.txt", 'w') as f:
+            f.write(record_new_formatted)
+
+        subprocess.call("meld /tmp/dialin_test_record_old.txt /tmp/dialin_test_record_new.txt", shell=True)
+
+
 def test_dg_service_record():
     dg = DG(log_level="DEBUG")
     if dg.cmd_log_in_to_dg():
@@ -210,9 +289,10 @@
     # test_dg_system_record()
     # test_dg_scheduled_runs_record()
 
-    test_hd_calibration_record()
+    # test_hd_calibration_record()
     # test_hd_service_record()
-    # test_hd_system_record()
+    test_hd_system_record()
+    # test_crc()