STEP: reduce op heater gain

solo/solomsgclass.py

@@ -83,7 +83,7 @@ class HK_SOLO(object):
             # Reduce the target temperature to accomodate the
             # estimated opheater duty cycle.
             TT=T
-            for n in range(5):
+            for n in range(10):
                 TTT = cls.ADC_to_T(A + dc_estimate)
                 TT -= TTT-T
                 A   = cls.T_to_ADC(TT)

solo/step/ppss.py

@@ -26,7 +26,8 @@ class step_ppss(ppss_table):
     DEADTIME_cadence = 60
     OH_SETPOINT_C = -35 # °C
     OH_DC_ESTIMATE = 70 # %
-    OH_SETPOINT = HK_T_to_ADC(OH_SETPOINT_C, dc_estimate=OH_DC_ESTIMATE *192//100)
+    OH_SHIFT = 1 # reduce gain by 2**OH_SHIFT
+    OH_SETPOINT = HK_T_to_ADC(OH_SETPOINT_C, dc_estimate=OH_DC_ESTIMATE * 192//100 * 2**OH_SHIFT)
     OH_DC = 192
     OH_IDX = 14 # T₁
 
@@ -81,7 +82,9 @@ class step_ppss(ppss_table):
 
         self += ppss_item(1950, modulus_always, ix_reset(reset=0, gap=0), IX_ARESET=True)
         if not self.model or self.model.lower() != "seu_scan":
-            self += ppss_item(99, ppss_modulus(60,0), opheater(dcmax=self.OH_DC, setpoint=self.OH_SETPOINT), search=True, OPHEATER=True)
+            self += ppss_item(99, ppss_modulus(60,0),
+                              opheater(dcmax=self.OH_DC, setpoint=self.OH_SETPOINT, shift=self.OH_SHIFT),
+                              search=True, OPHEATER=True)
         else:
             self += ppss_item(99, ppss_modulus(60,0), opheater(dcmax=0, setpoint=self.OH_SETPOINT), search=True, OPHEATER=True)