DUAL CHANNEL OPERATION 
213 
Frequency Coupling (For 22XX only) 
 
Frequency coupling sets the frequency of the 
unselected channel as a frequency offset from the 
selected channel or as a ratio of the frequency of 
the selected channel. 
4.  To set the unselected 
channel’s frequency as an 
offset from the selected 
channel’s frequency, press F2 
(Offset). 
Use the selector keys and 
scroll wheel or number pad 
to enter the frequency offset.  
Press F2~F6 to select the 
offset frequency units. 
5.  To set the unselected 
channel’s frequency as a ratio 
of the selected channel’s 
frequency, press F3 (Ratio).