Embraer EMB145 - Page 2347

AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
MARCH 30, 2001
2-18-21
Page
11
Code
01
− Knob functions when selecting an ITU telephone channel
CHANNEL
SELECT KNOB
KNOB FUNCTION
Left outer This knob is used to select the ITU
band (the one or two left-hand digits
in the CHAN display). Clockwise
rotation of the knob increments the
CHAN display to the next higher
ITU band and counterclockwise
rotation decrements to the next
lower ITU band. If ITU channel 401
is being displayed, the next
clockwise increment of the knob will
cause ITU channel 601 to be
displayed, then 801, 1201, 1601,
and 2201. Rollover occurs between
the top ITU band (22 MHz) and user
programmed channel number 1,
and between the lowest ITU band
(4 MHz) and user programmed
channel number 40.
Left inner (pushed in) No effect on ITU channels.
Left inner (pulled out) Rotate to select between TEL SUP
CAR and TEL PLT CAR models.
Right outer This knob selects the individual
channel number within the ITU
band (the two right-hand digits in
the CHAN display). If the channel
number is incremented beyond the
highest channel for that band, the
lowest channel for the next higher
band will appear.
For example, if ITU channel 427 is
being displayed, the next clockwise
increment of the knob will cause
ITU channel 601 to be displayed.
Likewise, decrementing below the
lowest channel in a band will select
the highest channel in the next
lower band.
Right inner (pushed in or
pulled out)
No effect on ITU channels