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Specifications
36 Apollo GX50/60/65 Installation Manual
ALTITUDE INPUT REQUIREMENTS
The altitude data can be input to the GX50/60/65 from either an altitude encoder or serializer,
or from an air data computer.
The minimum requirements of the optional altitude data input are as follows:
Input method .............................................RS-232
Type ..........................................................pressure altitude
Resolution .................................................100 feet minimum
Accuracy ...................................................must meet accuracy requirements of TSO-C88a
Note: Installation of altitude input equipment, such as encoders, must be done according to
their installation instructions.
Note: Specifications for the RS-232 altitude input are included on pages 67 to 68.
ANNUNCIATOR REQUIREMENTS
The GX50/60 installed for IFR non-precision approach operation requires the following
annunciators (upper annunciator pictured below). Each annunciator should include a lamp of
the proper voltage for the installation. The lower annunciator is suitable for the GX65.
Legend Color
MSG amber
PTK blue or white
OBS/HLD blue or white- with included momentary switch
APPRCH blue or white
ACTIVE green
Installations that do not include non-precision approach operation may be made with the MSG
and PTK annunciators only.
The annunciators should be connected to a suitable dimming circuit for night time operation.
MSG
PTK
OBS/HLD
W PT SEQ APPRCH
ACTIVE
blue
amber
blue
Momentary Push Button
blue
green
Figure 16 - Example Annunciators