Integration Guide

Test modes
5.2.3 GPS SNR test
GPS SNR ON command executes a GPS SNR test. GPS L1 frequency is 1575.42 MHz and this test expects
the CW in signal generator to be 1575.750 MHz, i.e. 330 kHz offset from the center frequency. The
measurement duration is 1 ms.
The test is disabled automatically after 1 ms and dedicated GPS SNR OFF command is not needed.
GPS SNR ON has a one input parameter:
Parameter Range Description
Signal level at antenna -127 to -25 Signal generator level at antenna [dBm]
Table 4: GPS SNR ON input parameters
The response to the test is GPS SNR value measured by DUT in q4 format. q4 format results can be
converted into dB value by dividing the result by 2^4 (= 16).
Test setup
Figure 7: GPS SNR test setup example
5.3 RF signaling test
If full functionality against LTE network is tested in device manufacturing, it is possible to set up a signaling
mode test either by live network test or by using a telecommunication tester.
The use of test equipment with LTE signaling capability is strongly recommended. If live network is used a
network with good coverage and known signal quality is needed. Typically, it is difficult to guarantee live
network quality over time and caution is needed in the interpretation of results. Live network signaling
mode test is done by setting up a data connection and checking RX signal quality through AT command.
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