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286 – Enable Active Interference Cancellation

This command enables or disables active interference cancellation. This

feature helps remove jamming and narrow-band interference to enable a

position fix.

By default, this is enabled after the first fix is acquired.

The following examples show the use of this command.

Enable: $PMTK286,1*23<CR><LF>

Disable: $PMTK286,0*22<CR><LF>

Enable Active Interference Cancellation Command and Response

Command

Start

Msg ID

Enable

Checksum

End

$PMTK

286

,Enable

*Cksum

Response

Start

Msg ID

CMD

Flag

Checksum

End

$PMTK

001

,286

,Flg

*Cksum

Figure 29: Enable Active Interference Cancellation Messages Command and Response

Set NMEA Output Messages

This configures how often each NMEA output message is output.

Each field has a value of 1 through 5 which indicates how many position

fixes should be between each time the message is output. A 1 configures

the message to be output every position fix. A value of 2 configures the

message to be output every other position fix and a value of 5 configures

it to be output every 5th position fix. This along with message 220 sets the

time between message outputs.

A value of 0 disables the message.

The example below sets all of the messages to be output every fix.

$PMTK314,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,0*29<CR><LF>

The following example reads the current message configuration and the

module responds that all supported messages are configured to be output

on every position fix.

$PMTK414*33<CR><LF>

$PMTK514,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,1,0*2F<CR><LF>

NMEA Output Messages Command and Response

Write Message

Start

Msg

GLL RMC VTG GGA GSA GSV

DATA

ZDA 0 CK

End

$PMTK 314 ,GLL ,RMC ,VTG ,GGA ,GSA ,GSV ,0,0,0,0,0,0,0,0,0,0,0 ,ZDA ,0 *CK <CR><LF>

Acknowledge Response Message

Start

Msg

CMD Flag CK

End

$PMTK 001 ,314 ,Flg *CK <CR><LF>

Read Message

Start

Msg

End

$PMTK 414 *33 <CR><LF>

Response Message

Start

Msg

GLL RMC VTG GGA GSA GSV

DATA

ZDA 0 CK

End

$PMTK 514 ,GLL ,RMC ,VTG ,GGA ,GSA ,GSV ,0,0,0,0,0,0,0,0,0,0,0 ,ZDA ,0 *CK <CR><LF>

Figure 30: NMEA Output Messages Command and Response

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