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Rs-232 – Garmin SL40 User Manual

Page 35

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Serial Data Specifications

Apollo SL40 Installation Manual

29

5 = ARR, for arrival

= (3Dh) = MF, mandatory frequency

6 = AWS, automatic weather station

> (3Eh) = not defined, do not use

7 = CLR, clearance/delivery

? (3Fh) = undefined, for other frequency types

mk...... frequency:

m = desired frequency in MHz in hexadecimal, where m = desired frequency -
30h , with desired frequency in range of 118 to 136 MHz, or 162 MHz.
k = desired frequency in kHz where k = (desired frequency / 25 kHz) + 30h, with
desired frequency in range of 000 to 975 kHz in 25 kHz steps, or 0 to 39.

Example Message
$PMRRC0511IT64

Input a ground frequency type, 121.900 MHz.

R

EQUEST

O

UTPUT

M

ESSAGE

This message is used to request data output messages.

Message Format
$PMRRC06iidda

06 ....... message id
ii......... requested message ident:

03 = software version message

dd ....... set to 00
a ......... set to 0

Example Message
$PMRRC060300059

This message requests the software version message to be output.

RS-232

O

UTPUTS

T

RANSCEIVER

S

TATUS

This message is used to output the current transceiver frequencies and status.

Message Format
$PMRRC01mkmkas

01 ....... message id
mk...... active frequency (first mk):

m = frequency in MHz in hexadecimal, where m = frequency - 30h , with
frequency in range of 118 to 136 MHz, or 162 MHz.
k = frequency in kHz where k = (frequency / 25 kHz) + 30h, with frequency in
range of 000 to 975 kHz in 25 kHz steps, or 0 to 39.

mk...... standby frequency (second mk):

m = frequency in MHz in hexadecimal, where m = frequency - 30h , with
frequency in range of 118 to 136 MHz, or 162 MHz.
k = frequency in kHz where k = (frequency / 25 kHz) + 30h, with frequency in
range of 000 to 975 kHz in 25 kHz steps, or 0 to 39.