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Components assembly on the device; it should be verified that:
Communication with host controller can be established
o
The interfaces between module and device are working
o
Overall RF performance test of the device including antenna
o
Dedicated tests can be implemented to check the device. For example, the measurement of module current
consumption when set in a specified status can detect a short circuit if compared with a "Golden Device" result.
Module AT commands is used to perform functional tests (communication with host controller, check SIM card
interface, check communication between module and GPS, GPIOs, ADC input, etc.) and to perform RF
performance tests.
5.2.1 'Go/No go' tests for integrated devices
A 'Go/No go' test is to compare the signal quality with a "Golden Device" in a position with excellent GSM
network coverage and after having dialed a call (refer to u-blox AT Commands Manual [2], AT+CSQ command:
<rssi>, <ber> parameters).
These kind of test may be useful as a 'go/no go' test but not for RF performance measurements.
This test is suitable to check the communication with host controller and SIM card, the audio and power supply
functionality and verify if components at antenna interface are well soldered.
5.2.2 Functional tests providing RF operation
The command used to perform these functional tests is not available on LEON-Gx00-05S and previous
versions.
Refer to u-blox AT Commands Manual [2], for AT+UTEST command syntax description.
Refer to End user test Application Note [15], for AT+UTEST command user guide, limitations and
examples of use.
Overall RF performance test of the device including antenna can be performed with basic instruments like
standard spectrum analyzer and signal generator using an AT interface and AT+UTEST command.
The AT+UTEST command gives a simple interface to set the module in Rx and Tx test modes ignoring GSM
signalling protocol. The command can set the module:
To transmit in a single time slot a GSM burst in a specified channel and power level
In receiving mode in a specified channel to returns the measured power level
GSM.G1-HW-09002-G3
LEON-G100 / LEON-G200 - System Integration Manual
Preliminary
Product Testing
Page 116 of 125
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