SARA-R4/N4 series-AT Commands Manual
UBX-17003787 - R09
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14System features
Page 152 of 307
Parameter Description Range Default Notes
<par3> Training sequence 0 ÷ 7 5 Training sequence to be used (to be changed only in case
of link with network simulator, else use default)
In 3G / 4G RAT the values is unused.
<par4> Modulation mode 1 ÷ 2 1 Modulation mode:
o 1: GMSK normal modulation including the training
sequence
o 2: 8-PSK normal modulation including the training
sequence
In 3G / 4G RAT the parameter is ignored.
LTE SC-FDMA OFDM modulation (5 MHz
bandwidth), FDD, is automatically set using for
<par1> an EARFCN value.
<par5> Time 0 ÷ 600000 1000 Time interval for TX test expressed in ms
o 0: burst sequence is continuously transmitted. In
this case the command will immediately return
the information text response. The command line
will be immediately available for any +UTEST
command. Provide AT+UTEST=1 command to
stop the burst sequence transmission, any other
+UTEST commands can be set and the current
sequence transmission is stopped.
14.5.6î™–î™–î™–î™–Examples
In RX mode test command examples the module provides the information text response after the timeout
issued in the set command.
Command Response Description
AT+UTEST=2 +UTEST: 32,1000,-89,-88,-87
OK
The module measures the antenna RX level at RX channel
32 band GSM 900 for 1 s interval.
In the example -89,-88,-87 are the antenna RF level
estimation: the numbers are just an example.
AT+UTEST=2,885,5000 +UTEST: 885,5000,-66,-65,-65
OK
The module measures the antenna RX level at RX channel
885 band DCS 1800 for 5 s interval.
AT+UTEST=2,10562,2000 +UTEST: 10562,2000,-60,-60,-
59
OK
The module measures the antenna RX level at RX channel
10562 band B1 for 2 s interval on the main antenna path.
AT+UTEST=2,10562 +UTEST: 10562,1000,0,-85,-85,
-85
OK
The module measures the antenna RX level at RX channel
10562 band B1 for 1 s interval on the main antenna path.
AT+UTEST=2,65,3000,0 +UTEST: 65,3000,0,-63,-62,-62
OK
The module measures the antenna RX level at RX channel
65 band GSM 900 for 3 s interval on the main antenna path.
AT+UTEST=2,4357,,1 +UTEST: 4357,1000,1,-51,-51,-51
OK
The module measures the antenna RX level at RX channel
4357 band B5 for 1 s interval on the diversity antenna path.
AT+UTEST=2,102174,500,0 +UTEST: 102174,500,0,-71,-70,-
70
OK
The module measures the antenna RX level at RX channel
2174 band FDD 4 for 0.5 s interval on the primary antenna
path.
AT+UTEST=2,105230,,1 +UTEST: 105230,1000,1,-72,-71,
-70
OK
The module measures the antenna RX level at RX channel
5230 band FDD 13 for 1 s interval on the secondary antenna
path.
Table 12: RX mode test command examples
Command Response Description
AT+UTEST=3,32,7,5 +UTEST: 32,7,5,1,1000
OK
The module will transmit for 1 s interval 1 slot burst
sequence at TX channel 32 GSM 900 at PCL 5 using
training sequence 5 and normal GMSK modulation.
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