Garmin GTR 200 Installation Manual page 72

B.2.2.4.2 Remote Airport Frequency Input
This message is used to input frequency data for the specified list type.
Message format (GTR 200):
"GRM" ............ Company identifier.
"C"................... Message class.
"05" ................. Message identifier.
t........................ List type: (ASCII) "0", "1",..., "9".
f ....................... Frequency type (see Extended Frequency Type Enumeration).
mk.................... Frequency: m = MHz, where m = desired MHz frequency - 30h, ranging from 118
"0" ................... 8.33 KHz offset: (ASCII) 0 = 25 KHz frequency (.000)
Example message:
$PGRMC051AG>0<chksm><CR><LF>
Airport frequency list "1", automated surface observing station type, 119.250 MHz.
Message format (SL 40):
"MRR" ............ Company identifier.
"C"................... Message class.
"05" ................. Message identifier.
t........................ List type: (ASCII) "0", "1",..., "9".
f ....................... Frequency type (see Legacy Frequency Type Enumeration).
mk.................... Frequency: m = MHz, where m = desired MHz frequency - 30h, ranging from 118
Example message:
$PMRRC052<JP<chksm><CR><LF>
Airport frequency list "2", unicom type, 122.800 MHz.
GTR 200 Installation Manual
Page B-8
to 136 MHz, (i.e. 76h to 88h, A2h); k = (KHz offset / 25KHz) + 30h, ranging from
000 to 975KHz in 25 KHz steps.
to 136 MHz, (i.e. 76h to 88h, A2h); k = (KHz offset / 25KHz) + 30h, ranging from
000 to 975KHz in 25 KHz steps.
190-01553-00
Rev. B