tweak conversion functions for TimeBase FM

lib/system.py

@@ -121,16 +121,37 @@ AD5791_INIT = 0b00000000000000010010
 AD5791_DAC = 0b0001
 
 # 92.0 nominal; depth = 3.2768 MHz (n = 10)
-def MOT3_GREEN_AOM_FM(f: float) -> float:
-    if f < 88.8 or f > 95.4:
+def MOT3_GREEN_AOM_FM_10(f: float) -> float:
+    f0 = 92.0
+    if f - f0 < -3.1 or f - f0 > 3.2:
         raise Exception("MOT3_GREEN_AOM_FM: frequency out of range")
     a = [
-        -20410.0125,
-        +656.931397,
-        -7.07415392,
-        +0.02548931,
+        +0.03917258,
+        +2.63646086,
+        +0.00000000,
+        -0.01033688,
+        +0.00000000,
+        +0.00139064,
     ]
-    return sum(a[k] * f**k for k in range(4))
+    return sum(ak * (f - f0)**k for k, ak in enumerate(a))
+
+# 92.0 nominal; depth = 6.5536 MHz (n = 11)
+def MOT3_GREEN_AOM_FM_11(f: float) -> float:
+    f0 = 92.0
+    if f - f0 < -6.1 or f - f0 > 6.5:
+        raise Exception("MOT3_GREEN_AOM_FM: frequency out of range")
+    a = [
+        +0.00955450,
+        +1.30363916,
+        +0.00000000,
+        +4.2394e-06,
+        +0.00000000,
+        +2.0428e-05,
+    ]
+    return sum(ak * (f - f0)**k for k, ak in enumerate(a))
+
+def MOT3_GREEN_AOM_FM(f: float) -> float:
+    return MOT3_GREEN_AOM_FM_10(f) # change this call depending on the FM settings
 
 # 29.0 nominal; -60 offset on driver
 def MOT3_GREEN_AOM_AM(p: float) -> float: