Garmin NavComm SL30, Installation Manual

Page: 84 / 88

Serial Interface Specifications
76 Apollo SL30 Installation Manual
3 = 12V reference, in units of 50 mV, value ranges from 0 to 255.
4 = 28V reference, in units of 125 mV, value ranges from 0 to 255.
5 = Volume potentiometer, value ranges from 0 to 255.
6 = Photocell, value ranges from 0 to 255.
7 = Display thermistor, value ranges from 0 to 255.
8 = Crystal thermistor, value ranges from 0 to 255.
vv ...................Value. A two digit encoded hex number representing the latest value read
from the specified ADC channel.
Example message:
$PMRRV32637<chksm><CR><LF>
The latest value read from the Photocell (channel 6) is 0x37.
C
OMM
T
RANSCEIVER
S
TATUS
This message outputs the result of a specific system test.
Message format:
“V”.................Message class. This is a VHF NAV message.
“35”................Message identifier.
mk ..................Active frequency: m = MHz, where m = desired MHz frequency - 30h,
ranging from 118 to 136 MHz, 162 (i.e., 76h to 88h, A2h); k = (kHz
offset / 25 kHz) + 30h, ranging from 000 to 975 kHz in 25 kHz steps.
mk ..................Standby frequency: m = MHz, where m = desired MHz frequency - 30h,
ranging from 118 to 136 MHz, 162 (i.e., 76h to 88h, A2h); k = (kHz
offset / 25 kHz) + 30h, ranging from 000 to 975 kHz in 25 kHz steps.
a......................Transceiver status:
R = Normal receive
M = Monitor receive
T = Transmit enabled
S = Stuck mic
F = Comm failure
s......................Squelch test setting: (ASCII) 0 = automatic; 1 = test
Example message:
$PMRRV35G4LFR0<chksm><CR><LF>
Active frequency is 119.100 MHz, the standby frequency is 124.550 MHz, receive function,
squelch is automatic.
C
OMM
S
OFTWARE
V
ERSION
This message is used to output the version string for the VHF Comm receiver software.
Message format: