PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
PRIMUS
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II Radio System
C--20
When the NAV window is split, an amber
H
(hold) is displayed in the
lower (DME) window. The
H
indicates that the distance display (DME
or TACAN) is not paired with the VOR/ILS navigation data. When the
H
is displayed, the other aircraft systems HOLD annunciators also light.
Display of the DME (or TACAN) channel being held positively identifies
the navigation channel. The DME station identifier is also displayed.
NOTE:
It can take up to 2 or 3 minutes for the station identifier to be
displayed.
The DME function key operation is described in table C--3.
Step
Procedure
1
Select the DME function key. The NAV window splits with
the upper half VOR/ILS tuning and the lower half DME
channel tuning.
2
Move the cursor to the DME window (lower) and tune
115.60, as shown in figure C--13. PXR is the identifier for
that channel. An amber
H
is shown.
3
Move the cursor to the upper VOR/ILS window with the top
line select key and tune 108.30.
4
When it is no longer necessary to hold the DME channel,
cycle the DME function button until the split is removed
from the NAV window.
DME Function Key Operating Procedure
Table C--3
ATC Transponder and TCAS Operations
GENERAL
ATC transponder and TCAS operations are controlled by code, mode,
range, and surveillance line select keys, transponder (1/2) button, and
code/mode select (TUNE) knobs on the RMU.
CONTROLS AND ANNUNCIATIONS
The following controls and annunciations are used to operate the ATC
transponder and TCAS. Refer to figure C--13 for locations.
