Specifications

SECTION III
MODEL 560 INSTRUMENTATION AND AVIONICS
ANNUNCIATORS
The NAV control contains MEM (memory), RMT (remote), and HLD (hold) annunciators. The MEM
annunciator illuminates whenever a preset frequency is being displayed in the lower window. The RMT
annunciator indicates that the VIR-32 is being remotely tuned by the NMS, FMS, etc. The remote tune
frequency is displayed in the upper window, and this frequency is the frequency being returned by the
VIR-32. The HLD annunciator indicates that the DME is held to the active frequency at the time of
selection; the NAV frequency may be changed. The upper window displays the NAV frequency and the
lower window displays the held DME frequency.
The pilot or copilot can display NAV 1 or NAV 2 on the primary flight display (PFD) by selecting either
NAV by means of the NAV push button on his DC-550 display controller. The selection progression is NAV
1, NAV 2, NAV 1, etc., as the button is pressed. The NAV selected by means of the NAV button is
displayed on the PFD in the horizontal situation indicator (HSI) portion of the display. It provides course
guidance to the flight director if it is engaged. NAV 1 may be selected on the " O " bearing needle and
NAV 2 may be selected on the “
~ " bearing needle, by the applicable " O " or " ~ " bearing selector
knobs. Selections made by means of the bearing knobs cannot interface with the flight director or autopilot.
The pilot’s IC-600 Display Guidance Computer (DGC) provides the autopilot control function as well as
guidance for the pilot’s flight director (FD 1). The copilot’s DGC contains the copilot’s flight director (FD 2)
guidance function but has no autopilot guidance component of its own, however, the copilot’s attitude,
heading, and NAV course commands can be switched to the pilot’s IC-600 (see AP XFER/FD 1/AP
XFER/FD 2 switch, below) if desired. Selections made on the copilot’s flight director will then be controlling
the autopilot and flight director.
If the same NAV (VOR) selections are made on both DC-550s, the selection will be annunciated on
the PFDs in amber.
A switch (AP XFER/FD 1/AP XFER/FD 2) is installed to enable selection of either flight director to
control the autopilot. If FD 1 is selected, navigation guidance is being provided by the NAV selection
made
on
the pilot's CD-550. If FD 2 is selected, the selection must be made on the copilot's CD-550.
A red X will appear in the center of the PFD if course information is unreliable or not present.
Glideslope frequencies are paired with localizer frequencies so that the correct glideslope channel is
automatically selected when the localizer is tuned. Glideslope deviation will be displayed on the pilots’
PFDs when an ILS frequency is tuned and the airplane is within range of the ILS. If the localizer signal is
unreliable or absent, a red X will appear in the center of the PFD. If glideslope information is absent or
unreliable, a red X will appear at the glideslope indication on the pilot's PFD.
Figure 3-13. CTL-32 Control Panel
I 56OMB-01 Configuration AA 3-27