HP 70427A User Manual page 359

Softkeys and Displays
RETUNE YTF
RETUNE YTF
This softkey triggers the tuned source to center the YIG-Tuned-Filter (YTF)
on the appropriate comb line or mixing product for the current output
frequency.
Path
Output Retune YTF
HP-IB command None.
Figure 10-79 HP 70428A Option 002
10-116 HP 70427A/HP 70428A User's Guide