V A L A V I O N I C S L T D
I N S 4 2 9 I N T E G R A T E D N A V I G A T I O N S Y S T E M
I N S T A L L A T I O N A N D O P E R A T O R ’ S M A N U A L
Revision 3
Page 26 of 31
May 2013
SET OMNI-BEARING SELECT (OBS) VALUE
This message is used to set the OBS value used by the INS 429 as the elected radial for computing the
course deviation from a VOR. This message will have no effect unless the INS 429 is configured to use the
internal OBS source, or a serial OBS source.
Message format:
“V” .................. Message class. This is a VHF NAV message.
“34” ................. Message identifier.
vvv .................. OBS Value in degrees, ranging from “000” to “359”.
Example message:
$PMRRV34310<chksm><CR><LF>
Set the OBS value to 310 degrees.
V
OLUME AND
S
QUELCH CONTROL
This message is used to adjust the volume and squelch levels of the COM unit
Message format:
"V" ..................... Message class - VHF NAV Message
"71" .................... Message Identifier
"vs"..................... Volume level and Squelch Level:
v = Desired volume level in encoded hexadecimal, where v = desired
level + 0x30 with a range between 0 - 20, 0 being muted
s = Desired squelch level in encoded hexadecimal, where s = desired level
+ 0x30 with a range between 0 - 20, 0 being off
Example Message:
$PMRRV71;?<chksum><CR><LF>
This example command would set the volume level at 11 and the squelch at 15.
M
IC
G
AIN AND
S
IDETONE CONTROL
This message is used to adjust the volume and squelch levels of the COM unit
Message format:
"V" ..................... Message class - VHF NAV Message
"72" .................... Message Identifier
"ms".................... Volume level and Squelch Level:
m = Desired mic gain level in encoded hexadecimal, where m = desired
level + 0x30 with a range between 1 - 20
s = Desired sidetone level in encoded hexadecimal, where s = desired level
+ 0x30 with a range between 1 - 20.
