Appendix B - Serial Interface Specifications
B-12
560-0982-01 Rev A
GNS 480 (CNX80) Installation Manual
$PMRRV<msg_id><msg_data><chksum><cr>
The checksum is computed by an 8 bit addition of the msg_id and msg_data characters, ignoring carry if
any. The resulting 8 bit checksum is converted to two ASCII characters by taking the upper and lower
nibbles, adding 30h to each, and placing the most significant character first in the data message.
B.2.1.4.1
Airport Ident Output
This message is used to output the selected airport ident.
Message Format
$PMRRC04tiiii<chksum><cr>
04 .............. message id
t ................. list type, outputs a 1
iiii.............. ident, four character ASCII
Example Message
$PMRRC041SLE<space>99<cr>
Output ident of “SLE” for the following frequency information.
B.2.1.4.2
Frequency Data Output
This message is used to output the airport frequency information for the previously output ident.
Message Format
$PMRRC05tfmk<chksum><cr>
05 message
id
t
list type, input 1
f frequency
type:
0 = TWR, tower frequency
8 = CTF, common traffic advisory frequency
1 = GND, ground frequency
9 = DEP, departure
2 = ATS, for ATIS
: (3Ah) = FSS, flight service station
3 = ATF, air traffic frequency
; (3Bh) = RFS, for remote flight service station
4 = APP, for approach
< (3Ch) = UNI, for unicom
5 = ARR, for arrival
= (3Dh) = MF, mandatory frequency
6 = AWS, automatic weather station
> (3Eh) = CTR (Center)
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 the
desired frequency in the range of 118 to 136 MHz, or 162 MHz.
k = desired frequency in kHz where k = (desired frequency / 25 kHz) + 30h, with the desired
frequency in the range of 000 to 975 kHz in 25 kHz steps, or 0 to 39.
Example Message
$PMRRC0511IT64<cr>
The above example message outputs a ground frequency type, 121.900 MHz.
Содержание GNS 480
Страница 1: ...GNS 480 CNX80 Color GPS Nav Com Installation Manual September 2004 560 0982 01 Rev A...
Страница 10: ...Table of Contents viii 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 30: ...General Information 1 20 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 41: ...Installation Procedures GNS 480 CNX80 Installation Manual560 0982 01 Rev A 2 11 Figure 2 3 GNS 480 Dimensions...
Страница 126: ...Periodic Maintenance 6 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 144: ...Appendix B Serial Interface Specifications B 16 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 148: ...Appendix C Equipment Compatibility C 4 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 150: ...Appendix D Interconnect Diagrams D 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 182: ...Appendix E Acceptable Aircraft by Evaluation E 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
Страница 184: ...Appendix F Optional Accessories Not Supplied F 2 560 0982 01 Rev A GNS 480 CNX80 Installation Manual NOTES...
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