Testing Rf Transmission Path-Mc87Xx - Sierra Wireless MC5725 Hardware Integration Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
Note: These AT commands
generate a modulated test
signal.
86
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Prepare the DUT using the following AT commands:
2.
AT!OEM=176
a.
set)
AT!DIAG
b.
AT!CHAN=600,1
c.
or
AT!CHAN=384,0
The power meter should read ‐100 dBm, indicating no
signal.
AT!TX=1
d.
AT!ALLUP=1
e.
The power meter should read from 0–24 dBm,
depending on your setup.
AT!TX=0
f.
Test limits:
3.
Run ten or more good DUTs through this test proce‐
dure to obtain a nominal output power value.
· Apply a tolerance of
(assuming a good setup design).
· Monitor these limits during mass‐production ramp‐up
to determine if further adjustments are needed.
Note: The MC57xx has a nominal output power of +24 dBm
However, the value measured by the power meter depends on the
test setup (RF cable loss, couplers, splitters) and the DUT design.
Note: When doing the same test over the air in an RF chamber,
values are likely to be significantly lower.
Testing RF transmission path—MC87xx
Note: This procedure segment is performed in Step
Suggested test plan procedure (page
Table 8‐1 contains parameters used in the suggested test
procedure that follows.
Proprietary and Confidential
(Unlocks the extended AT command
(Set modem in diagnostic mode)
(PCS band, channel 600)
(Cellular band, channel 384)
(Turns on transmitter)
(Enables all ups condition)
(Turns off transmitter)
±
5 to 6 dB to each measurement
13
84).
±
1 dB.
of the
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