4410-4412: clarify nominal power

The same figure can be found in sinara issue 354 / urukul issue 3, and it was meant to be an empirical limit for low frequency RF outputs.

4410-4412.tex

@@ -334,7 +334,8 @@ RF switches (1ns temporal resolution) on each channel provides 70 dB isolation.
     \textbf{Parameter} & \textbf{Symbol} & \textbf{Min.} & \textbf{Typ.} & \textbf{Max.} &
     \textbf{Unit} & \textbf{Conditions} \\
     \hline
-    Nominal power & & & & 10 & dBm & 13 dBm P1dB\\
+    Low frequency power & & & & -20 & dBm & 100 kHz output \\
+    & & & & 10 & dBm & 1 MHz output \\
     \hline
     Frequency & & 1 &  & 400 & MHz & \\
     \hline