User Manual

Table Of Contents
SARA-R4 series-AT commands manual
UBX-17003787 - R16
14System features
Page 161 of 401
14.3Antenna detection +UANTR
+UANTR
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
14.3.1Description
Measures the DC component of load of the cellular antenna (the GPS antenna is RFU). The antenna load is
expressed in kOhm.
14.3.2Syntax
Type Syntax Response Example
Set AT+UANTR=[<antenna_id>] +UANTR: <antenna_id>,<antenna_
load>
OK
AT+UANTR=0
+UANTR: 0,10
OK
Test AT+UANTR=? +UANTR: (list of supported
<antenna_id>s)
OK
+UANTR: (0)
OK
14.3.3Defined values
Parameter Type Description
<antenna_id> Number Antenna identifier (optional parameter):
0 (default value): cellular antenna
1: GPS antenna (RFU)
<antenna_load> Number Measured value in kOhm of the antenna load with a resolution of 1 kOhm. The range
goes from -1 to 53 (only integer values can be assumed), where:
-1: open circuit
0: short circuit
1: 1 kOhm (minimum limit of the measurement range)
...
53: 53 kOhm (maximum limit of the measurement range)
14.3.4Notes
The load resistor values below the minimum limit of 1 kOhm are identified as short circuit (<antenna_
load>=0), while values above the maximum limit of 53 kOhm are identified as open circuit (<antenna_
load>=-1).
The reported value could differ from the real resistance value of the diagnostic resistor mounted inside
the antenna assembly due to antenna cable length, antenna cable capacity and the measurement
method.
14.4End user test +UTEST
+UTEST
Modules All products
Syntax PIN required Settings saved Can be aborted Response time Error referenceAttributes
full No No No - +CME Error
14.4.1Description
Enables the module testing on the RF parts and all the digital pins.
The usage of this command shall be restricted to controlled (shielded chamber/box) environments and
for test purposes only.
u-blox assumes no responsibility for the inappropriate use of this command.