Rs-232 – Garmin SL40 User Manual
Page 35
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<cr>
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<chksum><cr>
06 ....... message id
ii......... requested message ident:
03 = software version message
dd ....... set to 00
a ......... set to 0
Example Message
$PMRRC060300059<cr>
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<chksum><cr>
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.