Textron 172R180HP, Pilot Operating Handbook

Page: 279 / 396

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CESSNA
MODEL 172R
SECTION 9 - SUPPLEMENTS
SUPPLEMENT 1 - FAA APPROVED
1. OPERATING COMM FREQUENCY DISPLAY -- Displays
COMM ACTIVE and COMM STANDBY frequencies with a "T"
between them to indicate TRANSMIT and an "R" to indicate
RECEIVE modes of operation.
2. OPERATING NAV FREQUENCY DISPLAY - The right
portion of the display is allocated to NA V receiver ACTIVE and
STANDBY information. The frequency channeling is similar to
the COMM when operating in the frequency mode. The NAV
ACTIVE and STANDBY frequencies are stored in the memory
on power down and return on power up.
3. NAV STANDBY/OBS/Bearing/Radialmmer Display -- The right
side of the NAV display is controlled by the MODE
SELECTOR BUTTON (see #7 below). With an active VOR
frequency, this portion of the display shows the STANDBY
frequency, OBS setting for the internal COi, the bearing to the
VOR station, radial from the VOR station, or a count-up/count­
down timer. With an active localizer frequency, this portion of
the display shows the standby frequency, the letters "LOG", or
count-up/count-down timer.
4. NAV FREQUENCY SELECTOR KNOB (SMALL) -- Operates
in 50 kHz steps. The NAV receiver's lower and upper
frequency limits are 108.00 MHz and 117.95 MHz. Exceeding
the upper limit of frequency band will automatically return to
the lower limit and vice versa. A clockwise rotation will
increase (inc) the previous frequency while a counterclockwise
rotation will decrease (dee) the previous frequency.
5. NAV FREQUENCY SELECTOR
KNOB
(LARGE) -- Operates
in 1 MHz steps. The frequency inc/dee operates the
STANDBY frequency display. A clockwise rotation will
increase the previous frequency while a counterclockwise
rotation will decrease the previous frequency. Exceeding the
upper limit of the frequency band will automatically return to
the lower limit and vice versa.
Figure 1. Bendix/King KX 155A VHF
NAV/COMM
with Kl 208 or Kl
209A Indicator Head (Sheet 3 of 7)
Dec 2/96
S1-7