Confidential
USERS MANUAL
103(158)
Document number
Revision
1/198 17-4/FCP 101 3045 Uen
D
Description
Syntax
Possible Responses
Reads the antenna test
limits
AT*EANTLIM=0,<ant> *EANTLIM:
<open>,<short>
OK
Sets the antenna test
limits
AT*EANTLIM=1,<ant>,
<open>,<short>
*EANTLIM:
OK
Reads the periodic test
interval
AT*EANTLIM=2 *EANTLIM:
<interval>
OK
Sets the periodic test
interval
AT*EANTLIM=3,<interval> *EANTLIM:
OK
This command can read and set the following antenna diagnostic test parameters:
•
OPEN
limit
•
SHORTED
limit
•
Periodic test interval time
These parameters are NV items and are maintained across power cycles.
The parameter limits set the GOOD window for antenna diagnostic testing. These limits are values
representing ADC voltage readings. Based on the ADC reading from the antenna diagnostic voltage divider
network, the current antenna status (GOOD, OPEN, or SHORTED) can be derived from comparison to the
these limits.
Notes:
•
The current antenna status can be returned via the AT*EANTDIAG command.
•
A centered ADC value of 127 indicates a properly connected antenna with a resistance to ground of
10K ohm. Resistance changes of 5% or less per ADC LSB are maintained for the antenna resistance
range of 1K ohm to 20K ohm.
•
An unsolicited message is returned on any status change for only the current selected antenna (see
AT*EASW command for antenna switching details). The antenna status check occurs every <interval>
seconds.
•
The resistance to ground of the Developer Kit antenna is OPEN, and many communication analyzers
have an input resistance to ground of 50 ohms. Therefore, the default values have been selected to
effectively disable antenna diagnostic testing.
Parameter
Description
<ant>
1
Antenna 1
2 Antenna
2
<open>
ADC limit for OPEN status ( > nominal antenna ADC reading ), range 0-255,
default value = 255
<short>
ADC limit for SHORTED status ( < nominal antenna ADC reading), range 0-255,
default value = 0
<interval>
default value = 0
0
Disables periodic antenna diagnostic testing
2 – 60
Periodic antenna diagnostic test interval ( in seconds )
4.14.4.1
Unsolicited Message Antenna Diagnostic Status Change