Quality Assurance Testing - Sierra Wireless MC5725 Hardware Integration Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
Note: Actual measured results
will vary, depending on your
testing setup.
Note: QA is an ongoing process
based on random samples from
a finished batch of devices.
96
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
AT!AVCODECSTG=0,FFFF
c.
audio profile 0)
3. Take measurements using the following commands (Note
that the module has a gain of 4 dB in audio loopback
mode.)
Press the ACV button to measure the AC level.
a.
· Expected range: 1–2.5 VAC
b. Press the FREQ button to measure the frequency.
· Expected value: 1 kHz
Press the Shift and THD buttons at the same time to
c.
measure the total harmonic distortion.
· Expected value: < 1%
d. Reset the audio parameters:
· (MC5725V /
AT!AVAUDIOLPBK=0
mode)
· (MC8775V / MC8785V / MC8790V / MC8791V /
MC8792V)
AT!AVDEF
parameters to default values)

Quality assurance testing

The quality assurance tests that you perform on your finished
products should be designed to verify the performance and
quality of your devices.
The following are some testing suggestions that can confirm
that the antenna is interfaced properly, and the RF module is
calibrated and performs to specifications:
Module registration on cellular networks
•
Power consumption
•
Originate and terminate data and voice (if applicable) calls
•
Cell hand‐off
•
• Transmitter and receiver tests
• FER (Frame Error Rate) as an indicator of receiver sensi‐
tivity / performance
Channel and average power measurements to verify that
•
the device is transmitting within product specifications
RF sensitivity tests
•
‐specific:
• MC57xx
Waveform quality tests (calculating the "rho" parameter)
·
to compare the CDMA signal's power distribution
against the ideal distribution—rho must be >0.97 with
max freq error of 0.5 to pass.
FER testing—test the receiver sensitivity for conditions
·
of minimum cell power. FER can be measured for the
Proprietary and Confidential
(Sets sidetone gain for
MC5727V / MC5728V )
(Disables audio loop‐back
(Sets configurable audio
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