LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
Features description
Page 73 of 103
Figure 40: Band Class 1 PCS Channels (BC1)
3.4.5.4
<par4>: Reserved
The <par4> is reserved for development purposes. For now, even if this value is not mentioned in the syntax,
module will fill in with its default value which is 0
3.4.5.5
<par5>: Time Interval
<par5> configures the length of time (expressed in milliseconds) for which the module will transmit.
With time parameter set to 0, the RF signal is continuosly transmitted and an OK response will be sent soon
after the command execution. After the OK response, another test command can be sent. The transmission
is stopped sending the commands AT+UTEST=0, AT+UTEST=1 or AT+UTEST=2. The transmission is
changed, updating the parameters with the another AT+UTEST=3 command.
Tx path test should be performed with spectrum analyzer connected to the antenna port. It should be
tuned to the center frequency of the expected test channel. Based on the dUTEST Tx signal level
setting, which is -45dBm, after the +UTEST Tx test command is executed, the spectrum analyzer should
illustrate a CDMA signal with the signal level of -45dBm +/- 0.5 dB in the expected channel center
frequency and bandwidth. If the expected response is not received, then it indicates that the Tx path is
broken or has defects.
When +UTEST is used the correct band and its corresponding channel have to be used. If the channel and
band are not correct, the command will throw “ +CME ERROR : Invalid parameter “
After any +UTEST command has been executed, AT+UTEST=0 should be used to turn OFF UTEST
mode and the module or UUT (unit under test) has to be power cycled to bring the module back
to the normal operational mode.
