BENDIXKing AeroNav 910 Pilot's Manual page 40

AeroNav 900/880 Series Pilot's Guide
A more automated way to tune a com frequency is to use the
frequency list, which is presented when the left knob is turned to
start a manual tuning. See the section on page 1-33 regarding
operation of the frequency list.
The #1 Standby can also be tuned from other pages on the
AeroNav such as the INFO or NRST Tab on the FMS page.
Invalid Frequency Entry Attempt
Attempting to type an invalid frequency (e.g. typing a nav freq in a
com slot) will produce a temporary error message indicating the
mistake. This message is unavailable in dual AeroNav
installations that have Keyboard Convenience mode (described
later) turned on.
Notification of Invalid Frequency Entry Attempt
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1-30 System Overview Rev 1 May 2019