Embraer EMB145 Operation Manual page 2263

NAVIGATION AND
AIRPLANE
COMMUNICATION
OPERATIONS
MANUAL
COM OPERATION
The normal COM operation is enabled with the RMU RADIO Page
displayed. The COM window has two frequency lines. The upper line
displays the active COM frequency while the lower line displays the
preset frequency. Pressing the Line Select Button associated with the
preset frequency will cause the yellow cursor box to move to enclose
that frequency. In this condition, the enclosed preset frequency may be
changed through the Frequency Tuning Knobs. When the Frequency
Tuning Knobs are actuated, the label MEMORY and the associated
memory location number, both below the lower frequency line, will
change to a TEMP label indicating that the new preset frequency is not
yet stored in the memory of the RMU. Frequency storage may be
accomplished by pressing the Memory Storage Button, labeled STO,
on the RMU Bezel Panel. This action will also provide the previous
MEMORY label and the associated memory location number to
replace the TEMP label, indicating that the new preset frequency has
been stored in the indicated memory location.
Placing the yellow cursor box to enclose the MEMORY label, by
pressing a second time the Line Select Button beside the COM
window, will allow scrolling through the entire RMU stored memory.
This may be performed by rotating the Frequency Tuning Knob either
clockwise to memory location increment or counterclockwise to
decrement.
The exchange between the active frequency displayed in the upper line
of the window and the preset frequency displayed in the lower line may
be accomplished by pressing the Frequency Transfer Button on the
upper left corner of the RMU Bezel Panel. This effectively causes the
COM to change to the new active frequency that previously was the
preset frequency. In this condition, the previous active frequency drops
down to the second line of the COM window and becomes a temporary
preset frequency. This is indicated by the TEMP label displayed under
that frequency. The TEMP label also indicates, in this case, that the
frequency displayed in the second line has not been stored in a
memory location.
NOTE: The RMU controls the third VHF for airplanes equipped with
Honeywell Third VHF System RCZ-833/853 models.
Page Code
5 01
2-18-11
REVISION 31