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Serial Interface Specifications
64 Apollo GX50/60/65 Installation Manual
a single remote VOR list, so each list received will replace any previous list. There may be up
to twenty entries in the remote VOR list. Any entries past twenty will be ignored.
Remote VOR Input
This input is used to input VOR frequency data used for the remote recall function.
The data consists of five characters for the VOR station identifier followed by two characters
defining the VOR frequency.
Message format:
“V”.................Message Class. This is a VHF NAV message.
“20”................Message Identifier.
vvvv ...............VOR station identifier. Note that if the station identifier is less than four
characters, then the trailing characters will be filled with spaces. Station
Identifiers are restricted to using ASCII characters 0-9 and A-Z.
mk ..................Frequency: m = MHz, where m = desired MHz frequency – 30h, with the
desired frequency ranging from 108 to 117, or 3Ch to 45h; k = kHz, where
k = (desired kHz offset / 25 kHz) + 30h, with desired frequency range of
000 to 975 kHz in 50 kHz steps, or the even numbers from 30h to 56h.
Note that the field will be checked to ensure that it is in range and a valid
VOR frequency. Frequencies used for localizers, which are in the range of
108.10 to 111.95 MHz, will not be accepted in this message type.
Example message:
$PMRRV20UBG<Sp>E@<chksm><CR><LF>
VOR station identifier is “UBG ”, VOR frequency is 117.400 MHz.
Remote VOR List Trailer
This input command marks the end of a VOR list sent by a remote device.
Message format:
“V” Message Class. This is a VHF NAV message.
“21” Message Identifier
Example message:
$PMRRV21<chksm><CR><LF>
Indicates the start of a remote VOR list.
REMOTE LOCALIZER LIST
The following two commands work together in allowing remotely connected devices to
provide a list of localizer frequencies associated with an airport to the SL30. The remote
device should first send the Remote Localizer List Header command (message identifier 22),
followed by a sequence of Remote Localizer Input commands (message identifier 23). The