Sierra Wireless MC5725 Hardware Integration Manual page 95

Rev 1.9.1 Feb.09
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
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). For
additional details concerning use of the Dev Kit, see
the PCI Express Mini Card Dev Kit Quick Start Guide
(Document 2130705).
If using a custom host platform:
d.
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:
(MC5725V / MC5727V / MC5728V)
AT!OEM=176
a.
set)
AT!DIAG
b.
AT!AVAUDIOLPBK=1
c.
AT!CODECGAIN=8000,8000,8000
d.
the loopback path to +6 dB (Tx), +6 dB (Rx) and ‐6dB
(SideTone).)
· Total loopback gain =
· For this example, total loopback gain = +4 dB
(MC8775V / MC8785V / MC8790V / MC8791V / MC8792V)
AT!UNLOCK="<lockCode>"
a.
command set)
AT!AVSETDEV=0,0,0
b.
microphone for audio profile 0)
Proprietary and Confidential
(Unlocks the extended AT command
(Sets modem in Diagnostic mode)
(Enables audio loop‐back mode)
(Sets codec gains in
Σ
(codec gains) ‐ 2 dB
(Unlocks extended AT
(Unmutes speaker and
Testing
95