Xplore Technologies Corp. MC7750 Manual Do Utilizador

Product Technical Specification & Customer Design Guidelines

74

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Consider the following tests when you design your production test procedures for 
devices with the AirPrime module installed.

Visual check of the module’s connectors and RF assemblies

Module is operational

USB connection is functional

LED is functional

W_DISABLE_N (module power down)

Firmware revision check

Rx tests on main and auxiliary paths

Tx test

The following is a suggested test plan — you must decide which tests are 
appropriate for your product. You may wish to add additional tests that more fully 
exercise the capabilities of your product.

Using an appropriate Dev Kit-based test station, and referring to the appropriate 
AT command references:

Visually inspect the module’s connectors and RF assemblies for obvious 
defects before installing it in the test station.

Ensure that the module is turned off before beginning your tests — Drive 
W_DISABLE_N low.

If using Linux, determine if any USB devices are currently connected to the 
computer:

Open a shell window and enter the command 

ls  / dev / tty / USB*

.

b. Record the ttyUSBn values that are returned; these are the currently 

connected USB devices. If the command returns “no such file or 
directory”, there are no devices currently connected.

Test 

W_DISABLE_N — Turn on the module by letting W_DISABLE_N float 

(high impedance).

Test USB functionality — Check for USB enumeration.
· (Windows systems) The Device Manager shows Sierra Wireless items 

under 

Ports (COM & LPT). The devices shown depend on the module type. 

For example:

]

· (Linux systems) Enter the command 

ls  / dev / tty / USB*

 and then record and 

compare the results with those from 

. If there are any new ttyUSBn 

devices, then the modem has enumerated successfully. (There should be 
seven new devices) For example: