Specifications

SECTION III
INSTRUMENTATION AND AVIONICS
MODEL 560
VHF NAV (Optional)
Dual VIR-432 navigation receivers provide VOR, localizer, glideslope and marker beacon capability.
The receivers are remotely mounted in the airplane tailcone with the standard CTL-32 controls located on
the lower right side of the center instrument panel. The VOR/localizer antennas are located high on either
side of the vertical fin. The glide slope antennas are located in the nose section inside the radome.
Each system has 200 VOR/LOC operating channels and 40 glideslope channels and automatic DME
channeling. Multiple outputs drive the Flight Director, standby HSI, and autopilot. All the basic functions
have a built-in self-test.
CTL-32 CONTROL PANELS
The CTL-32 control panel uses two digital readouts to display the controlling (active) frequency and a
pilot-selected preset frequency. Dual concentric frequency select knobs control the display which is cycled
between active (ACT) and preset tuning modes by consecutive pressing of the ACT switch. Holding the
ACT button for approximately 2 seconds enables the frequency select knobs to directly tune the VIR-32.
Push the ACT button a second time to return the display to the normal two-display mode.
In direct (ACT) tuning, dashes show in the preset window. The OFF/ON/HLD function switch selects
the mode of operation. On is the normal operating position. In HLD, the DME is held while NAV frequency
is changed. In addition to the active and preset frequencies, four additional frequencies can be stored in
memory to be called up with the MEM/XFR switch. Each time the MEM/XFR switch is pressed to MEM
position, a frequency from memory is loaded in the display and the memory is advanced to the next
location. Pressing the MEM/XFR switch to XFR exchanges the active and preset frequency displays.
Figure 3-12. PRIMUS II - NAV Controls
I 3-26 Configuration AA 56OMB-01