Learjet 60 - Marker Beacon Display; Navigation; VHF Navigation

Learjet 60

Pilot's Manual
NAVIGATION
The navigation system includes the radios and controls used
for
VORALS navigation,
DME, ADF navigation, ATC transponder oper-
ation and radio altitude
measurement . Tuning of all these functions
except the radio altimeter
is accomplished via the RadioTuning Units
(RTU) on the center
instrument panel or via the Control Display Units
(CDU) in the pedestal . The design
of the system though is such that
all navigation radio management
functions are channeled through the
RTUs regardless of their origin . The left
RTU normally tunes NAV 1,
ADF 1, ATC 1, etc . and the right RTU normally
tunes the #2 radios . If
an RTU fails, the
remaining RTU is capable of
tuning both #1 and #2
systems . Power for
the RTUs is 28 VDC supplied
through the 1-amp
RTU 1 and
RTU 2 circuit breakers on the pilot's
and copilot's circuit
breaker panels . RTU
1 will be operative during
EMER BUS opera-
tions .
The radio altimeter will be discussed later .
Navigation information is
presented in a general
manner and is in-
tended for familiarization
only . For a detailed
description and opera-
tion of the navigation system
refer to "Collins
Pro Line 4 Avionics
SystemFor The Learjet 60"
Pilot's Guide (P/N
523-0777003) .
VHF NAVIGATION
Dual
VHF navigation receivers and
controls are installed to
provide
the crew with
VOR bearing, VOR audio,
localizer deviation,
glides-
lope deviation,
marker beacon passage
identification
and marker bea-
con
audio . The receivers are
capable of tuning the
entire navigation
and
glideslope frequency
range . The 5-amp NAV
1 and NAV 2 circuit
breakers on the pilot's
and copilot's circuit
breaker panels supply 28
VDC to power the
VHF navigation receivers .
NAV 1 will be
powered
during EMER BUS operations
.
MARKER BEACON DISPLAY
Marker
beacon passage,
displayed on the PFD, is
indicated by a cyan
box
with "OM" for outer
marker, a yellow boxwith
"ivm" for middle
marker, or white empty box for
inner marker . Passage
of any marker
beacon is
also annunciated by
a small empty box
on the SDU . All
marker
beacon annunciations
flash when they
are displayed .
PM-123

5-49
Original