$PMDT

Configure Terrain Compensation

Platform:

SMART7-I, SMART7-W, SMART2-TB

Use this NMEA style command to configure the Terrain Compensation feature. The Terrain Compensation filter must be enabled using the TILTCOMPENSATIONCONTROL command for the Terrain Compensation feature to function.

The maximum antenna height allowed is 500 inches (12.7 metres).

The TILTFILTER command and TILTZERO command can also be used to configure the Terrain Compensation filter. Either method will successfully configure the Terrain Compensation feature, however only the single-stage zeroing procedure is supported with the $PMDT command. For best performance, two-stage zeroing using the TILTZERO command is recommended.

Message ID: 2308

Syntax

$PMDT,a,x,x,x,x.x*hh[CR][LF]

ASCII Example:

$PMDT,u,,1,1*78

Field	Structure	Description	Format	Symbol	Example
1	$PMDT	Command header This field contains the command name for abbreviated ASCII or the message header for ASCII (see page 1) or Binary (see page 1).	–	$PMDT	$PMDT
2	function	The function to perform, where: l = Set level state u = Set/Get antenna height x = Save level and height values r = Clear the saved level and height values Required field.	Char	a	,u
3	reserved	Reserved field, leave empty.	–	x	,
4	antenna height feet	Antenna height in feet. Will be combined with the antenna height inches field. Cannot be combined with the antenna height metres field.	Integer	x	,1
5	antenna height inches	Antenna height in inches. Will be combined with the antenna height feet field. Cannot be combined with the antenna height metres field.	Integer	x	,1
6	antenna height metres	Antenna height in metres. Cannot be combined with the antenna height feet and antenna height inches fields.	Float	x.x	,2.2
7	*hh	NMEA check sum.		*hh	*78
8	[CR][LF]	Sentence terminator.			[CR][LF]

For more information about configuring the Terrain Compensation feature using the $PMDT command, see Configuring Terrain Compensation using a NMEA Command.