Specifications

Testing
Rev 2.0 Apr.10 Proprietary and Confidential 85
c. If using a Sierra Wireless Mini Card Dev Kit, connect the signals as
follows:
i. Connect the generator output signal to the MIC1_P (positive) and
MIC1_N (negative) header pins located at CN18 on the Dev Kit.
ii. Connect the analyzer input signal to the SPK1_P (positive) and
SPK1_N (negative) header pins located at CN18 on the Dev Kit (see
Figure 8-1 on page 85). For additional details concerning use of the
Dev Kit, see the PCI Express Mini Card Dev Kit Quick Start Guide
(Document 2130705).
d. If using a custom host platform:
i. Connect the generator output to the microphone input (MIC, positive
and negative) in the host.
ii. Connect the analyzer input to the Speaker output (SPK, positive and
negative) in the host.
Figure 8-1: Mini Card Dev Kit showing MIC/SPK pins.
2. Set up the DUT using the following commands:
(MC5727V/MC5728V)
a.
AT!OEM=176 (Unlock the extended AT command set.)
b.
AT!DIAG (Set modem in Diagnostic mode.)
c.
AT!AVAUDIOLPBK=1 (Enable audio loop-back mode.)
d.
AT!CODECGAIN=8000,8000,8000 (Set codec gains in the loopback path
to +6 dB (Tx), +6 dB (Rx) and -6dB (SideTone).)
· Total loopback gain =
(codec gains) - 2 dB
· For this example, total loopback gain = +4 dB
(MC8775V/MC8790V/MC8791V/MC8792V/MC8795V)
a.
AT!UNLOCK=”<lockCode>” (Unlock extended AT command set.)
b.
AT!AVSETDEV=0,0,0 (Unmute speaker and microphone for audio
profile 0.)
c.
AT!AVCODECSTG=0,FFFF (Set sidetone gain for audio profile 0.)