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7
Test Scenarios
These scenarios evolve more around network and carrier testing.
7.1
Running CAIT/QXDM with the CM52
Qualcomm diagnostic messages are available on either the 2
the module variant. Diagnostic messages are always enabled on the CM52 and defaulted to 115200 baud.
Note: The baud rate cannot be changed via an AT command but can be set at the factory, refer to the
PRI.
It is recommended that the highest baud rate possible be used; doing so will reduce serial port congestion and
reduce the number of dropped messages.
Run the CAIT tool (or QXDM), ensuring the COM port is on the correct port.
7.2
Programming the correct PRL using External Tools
The CM52 is configured with a generic PRL; it is recommended that a more purposeful PRL be loaded prior to
testing. The PRL can be programmed using AT commands; however, it is recommended that a PRL
programming tool be used for convenience and accuracy. The MoST tool, which is supplied with the CM52, is
one candidate. QPST is another tool provided by Qualcomm.
7.3
MOB_P_REV
AT*ECPREV? is used to report to the user what the agreed CDMA protocol revision is in use.
AT*EPREV can be used to force the CM52 to behave as the specified protocol revision.
AT*EPREV=3 will force the CM52 to behave as an IS95A device.
7.4
Modifying the Service
AT*EPMOD can force the module to AMPS, Digital or Digital Preferred (it does NOT restart the CM52 as it did
on the CM-42). Note the command is persistent over restarts (power cycles) of the CM52.
Analog Only Operation use AT*EPMOD=1.
Digital Only Operation use AT*EPMOD=2.
Automatic Operation (Digital Preferred) use AT*EPMOD=0.
7.5
Set Voice Privacy
Voice privacy is set using the service option command of AT+COS
AT+COS=3,0,0,1 to enable Voice Privacy
AT+COS=3,0,0,0 to disable Voice Privacy
To query voice privacy mode issue
AT+COS?
And check the forth parameter returned.
8
CM-42 Software Compatibility
The CM52 and CM-42 are largely compatible; however, there are differences between the two products.
Decisions regarding changes in the CM52 were made based on the following factors:
•
Removing duplicate AT commands
•
Evaluation of features that are better placed in the application and not the modem
•
Evaluation of what featured needed to be present
•
Supporting Qualcomm AT commands over SEMC equivalent AT commands
Confidential
USERS MANUAL
Document number
1/198 17-4/FCP 101 3045 Uen
nd
UART or the USB connection depending upon
151(158)
Revision
D
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