Specifications

SECTION III
MODEL 560 INSTRUMENTATION AND AVIONICS
NOTE
• With passenger speaker mode selected and microphone selector switch selected to
oxygen mask, the same side cockpit speaker will not receive voice interphone
communications from the oxygen mask microphone of the opposite side pilot.
• Headset audio is not affected when (PASS SPKR) mode is selected.
A side tone control knob, which is concentric to the passenger speaker volume control knob, is
located on the lower left side of the audio control panel. The side tone control allows the pilot and copilot to
select individual side tone volumes within certain limits. The side tone cannot be completely removed;
some side tone will always remain. When the operator positions the control knob, side tone volume for all
of the transmitters being operated from the respective audio control panel, and the interphone side tone, will
be set.
A three-position AUTO SEL switch (SPKR-OFF-HDPH) automatically selects the proper speaker or
headphone to match the position of the rotary microphone selector switch. All audio sources can be
monitored at any time by use of the appropriate SPKR-OFF-HDPH switch regardless of the microphone
selector switch or the AUTO SEL switch positions. A MKR MUTE button, when pressed, silences the
marker beacon audio for approximately 30 seconds.
A two-position switch on the control wheel has MIC position for keying the transmitters and INPH for
interphone communication when using the lip microphone or oxygen mask microphone. If a hand-held
microphone is used, transmission is determined by the position of the microphone selector switch.
HONEYWELL PRIMUS II REMOTE RADIO SYSTEM - NAV
The RNZ-850 integrated navigation unit operates in the frequency range of 108.00 to 117.95 MHz.
The RNZ-850 system encompasses the functions of VHF NAV, localizer and glideslope receiver, and
marker beacon receiver, as well as the addition of functions of ADF and DME which, in conventional
systems, are separate units. Operation of the ADF and DME modes will be covered in this section where
operation of the standard ADF and DME installations is discussed. Operation of the marker beacon system
is discussed under "Marker Beacon" below.
Glideslope paired frequencies are tuned with the published ILS frequencies as in standard VHF NAV
practice. The RNZ-850 is the navigation component of the SRZ-850 integrated radio system. The two
NAV integrated receivers are controlled and tuned in a similar manner to the RCZ-833F units discussed
under PRIMUS II REMOTE RADIO SYSTEM - COM. A minor difference is the requirement for the PGE
(page) button to be pressed twice in order to access the NAV page which shows the first six NAV memory
locations. Otherwise, changing, storing and deleting frequencies is accomplished in the same manner.
The NAV frequency window on the main tuning (first) page has an additional function called the "DME
Split Tuning Mode". This function involves "DME hold" plus some additional features, and is discussed
under Distance Measuring Equipment in the Pulse Equipment part of this section.
NAV 2 is also tunable by the Auxiliary COM 1/NAV 2 control display unit. Tuning of the CDU is
discussed under Auxiliary COM 1/NAV 2 control display unit in this section.
Both NAV 1 and NAV 2 are selectable on the pilot's and/or copilot’s DC-550 display controller to be
displayed on the respective PFD. If both PFDs are displaying the same NAV source, the annunciation will
be in amber.
Operation of the NAV displays on the standby horizontal situation indicator (HSI) is discussed in this
section.
I 56OMB-01 Configuration AA 3-25