MTCBA-C1-N3【PDF 112/135 页】MODEM CDMA RS232 DUAL

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Chapter 19 – Antenna Commands

<poweredLowlim>

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

condition. Possible values are 0-255. Default is 0. Not applicable to the primary

antenna.

<poweredHighlim>

The ADC value above which the powered antenna is considered to be in an open

condition. Possible values are 0-255. Default is 255. Not applicable to the primary

antenna.

Antenna Diagnostic Status +WANTS

Description:

Syntax:

This command is used to perform an antenna diagnostic check and display the results. The

current values of the primary and secondary antenna ADC readings are compared against the

limits specified by the AT+WANTLIM command to determine the status (NORMAL, SHORT,

OPEN) of each antenna.

Command Syntax: AT+WANTS

Command

AT+WANTS

Possible Responses

+WANTS: 1,2

OK

Note: primary NORMAL, secondary OPEN

AT+WANTS +WANTS: 1,1

OK

Note: primary NORMAL, secondary NORMAL

AT+WANTS +WANTS: 0,1

OK

Note: primary shorted, secondary NORMAL

AT+WANTS? +WANTS: 0,1

OK

Note: primary shorted, secondary NORMAL

Values:

The +WANTS response displays the diagnostic status of the primary and secondary antennas as:

+WANTS: <primaryAntStatus>,<secondaryAntStatus>

<primaryAntStatus>

0

1

2

SHORTED (ADC value < low limit)

NORMAL ( low limit <= ADC value <= high limit)

OPEN (ADC value > high limit)

<secondaryAntStatus>

0

1

2

SHORTED (ADC value < low limit)

NORMAL ( low limit <= ADC value <= high limit)

OPEN (ADC value > high limit)

Notes:

1. For hardware versions 2.1 and later, the diagnostic status of the secondary antenna cannot

be determined in the un-powered state (AT+WANT=0) and will report NORMAL.

2. If the hardware version is 2.1 or later and a shorted condition occurs on the secondary

antenna in the powered state, the hardware will automatically disable power to the secondary

antenna to prevent damage to the modem. In this case, you must re-issue AT+WANT=1 to

re-enable power to the secondary antenna.

Antenna Diagnostic Status Change Unsolicited Response +WANTS

Description:

The +WANTS unsolicited message is reported to the application for a change in

the diagnostic status of one or both of the antennas. The AT+WANTPOLL

command is used to specify which antenna is checked and the interval between

checks. The AT+WANTLIM command is used to set the limits for the

comparison.

Syntax Response Syntax: +WANTS: <primaryAntStatus>,<secondaryAntStatus>

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

112

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