MTCBA-C1-N3【PDF 111/135 页】MODEM CDMA RS232 DUAL

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Chapter 19 – Antenna Commands

Chapter 19 – Antenna

Commands (Not for IP and GPS

Builds)

Configure Antenna Diagnostics +WANTLIM

Description:

Syntax

This command is used to configure the low limit and high limit diagnostic values of the primary

and secondary (diversity or GPS) antenna. The values are compared to the ADC reading from

the antenna diagnostic voltage divider network. The current antenna status (NORMAL, OPEN, or

SHORTED) is derived from comparison to these limits.

The ADC used to read the antenna diagnostic voltage divider network for the primary antenna

may be selected using the AT+WANTADC command.

The secondary antenna has two sets of low/high limits—one for the non-powered state and one

for the powered state. The secondary antenna is powered when the setting of AT+WANT=1. For

hardware revisions 2.1 and later, the non-powered low/high limits of the secondary antenna are

not applicable. Use the +WHWV command to determine the hardware version of your device.

The limit settings are persistent across power cycles.

Command Syntax:

AT+WANTLIM=<action>,<ant>[,<lowlim>,<highlim>[,<poweredLowlim>,<poweredHighlim>]]

Command

AT+WANTLIM=?

Note: show parameter ranges

AT+WANTLIM=1,1,30,74

Note: Set primary antenna low and high limits

AT+WANTLIM=2,1

Note: Display primary antenna diagnostic

limits

AT+WANTLIM=1,2,30,74,185,222

Note: Set secondary antenna non-powered

and powered low and high limits

AT+WANTLIM=2,2

Note: Display secondary antenna diagnostic

Possible Responses

+WANTLIM: (1-2),(1-2),(0-255),(0-255),(0-

255),(0-255)

OK

OK

+WANTLIM: 1,30,74

OK

OK

+WANTLIM: 2,30,74,185,222

OK

limits

AT+WANTLIM=2,1,53,33 ERROR

Note: Low limit must be less than or equal to

high limit

Values:

<action>

1

2

<ant>

1

2

<lowlim>

Set values

Display values

Primary antenna

Secondary antenna

The ADC value below which the non-powered antenna is considered to be in a

shorted condition. Possible values are 0-255. Default is 0. This value is ignored for

the secondary antenna of hardware versions 2.1 and later.

<highlim> The ADC value above which the non-powered antenna is considered to be in an

open condition. Possible values are 0-255. Default is 255. This value is ignored for

the secondary antenna of hardware versions 2.1 and later.

Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C)

111

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