LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
Features description
Page 69 of 103
This command gives the user a simple interface to set the cellular module to transmitting and receiving states
ignoring cellular signaling protocol. When the +UTEST interface is activated, the module is set to test mode. For
the module to return to normal operational mode +UTEST must be deactivated (AT+UTEST=0) and a reset or
power cycle must be performed.
The following definitions will be used in this document:
•
Normal Mode / Signaling mode:
The cellular module is able to access cellular networks. All
functionalities are enabled according to normal operation status (idle mode, active mode, connected
mode); this is typical operating mode of the cellular module.
•
Test mode / Non-signaling mode:
The test interface is activated. The cellular module is set to a state
in which it is not able to access the cellular network. The main software providing CDMA (and all
supported systems) network signaling protocol is not running. The test interface provides direct access
to the basic transceiver subsystem functionality, only for testing the hardware RF performance of the
transmitter or receiver. Complete RF performance required for cellular networks can only be evaluated
with the signaling protocol activating a radio link with a base station (or simulator)
The user can activate the test interface using the +UTEST AT command, to set the cellular module into these test
modes:
•
Transmit mode, to transmit a CDMA signal, selecting:
o
Channel
o
Output power level
o
Band Class
o
Reserved
o
Time period of the Tx signal generation
•
Receive mode, to measure the CDMA received signal, selecting:
o
Channel
o
Time period of the Rx signal measurement
o
Band Class
The purpose of the +UTEST AT command is to:
•
Test and troubleshoot device during host application board prototype stage
•
Test the device (i.e. the application board where the cellular module is mounted) in production
•
Execute measurements without a CDMA network simulator
The usage of this command shall be restricted to controlled (shielded chamber/box) environments and for
test purpose only. Improper usage of this command on real network could disturb other users and the
network itself.
+UTEST should not be used to test the receiver sensitivity. Those kind of tests have to be tested in online
mode with call box and correct call control parameter setting.
Cell Band
Channel Number
Preferred Channel
Number
Center Frequency for
Forward Channel N (MHz)
Center Frequency for
Reverse Channel N (MHz)
Band Class 0
1-799
384
0.03*N+870.000
0.03*N+825.000
991-1023
0.03*(N-1023)+870.000
0.03*(N-1023)+825.000
1024-1323
0.030*(N-1024) + 860.000
0.030*(N-1024) + 815.000
1324-1424
0.030*(N-1324) + 866.010
0.030*(N-1324) + 821.010
Band Class 1
0-1199
525
1930.000+0.05*N
1850.000+0.05*N
Table 36: Generic CDMA Channel Number to CDMA Frequency Assignment
