Garmin apollo sl30 nav Manuale Utente

This input is used to request an output message to be sent by the SL30. 
 
Message format: 

“V”.................Message class.  This is a VHF NAV message. 
“24”................Message identifier. 
ii .....................Output identifier of requested message, two ASCII characters. 
dd ...................Message data, two encoded hex

3

 characters (30h-3Fh), used for specific 

output request. Set to “00” if not needed. These characters are used for 
such items as selecting a specific EEPROM address to output. 

a......................Request type: (ASCII) “0” = output once; “L” =  output repeatedly at low 

speed (1 Hz); “H” = output repeatedly at high speed (10 Hz). 

 

ii 

 Output 

Dd  Data Description 

a 

“20” Reset 

Status 

“00” 

 

“0”, 

“21”  CDI, GSI, and Flags 

“00”   

“0”, “L”, “H” 

“22”  Decoded OBS Setting 

“00”   

“0”, “L”, “H” 

“23”  Radial from Active VOR 

“00”   

“0”, “L”, “H” 

“24”  Radial from Standby VOR 

“00”   

“0”, “L” 

“25”  Decoded Station Identifier 

“00”   

“0”, “L” 

“28” Receiver 

Status 

“00”  

“0” 

“29”  NAV Audio Mode 

“00”   

“0” 

“30” NAV 

Microcontroller 

Software Version 

“00”  

“0” 

“31”  NAV DSP Software 

Version 

“00”  

“0” 

“32”  ADC Data Output 

cc 

ADC channel: “00” to “08”  “0” 

“35”  Comm Transceiver Status 

“00”   

“0” 

“36”  Comm Software Version 

“00”   

“0” 

 
Example messages: 
 
 $PMRRV242100L<chksm><CR><LF> 
 
Request periodic output of CDI, GSI, and related flags at low (1 Hz) rate. 
 
 $PMRRV2432050<chksm><CR><LF> 
Request a single output of ADC data from channel 5. 
 
                                                 

3

 Encoded hex: each character consists of 4 bits of data placed in the low order nibble +30h.  For example, the 8-bit 

value 5Fh would be encoded as two characters with values of 35h and 3Fh, which map to the ASCII characters “5” 
and “?”, respectively.