Sierra Wireless AirPrime MC7710 Product Technical Specification & Customer Design Manuallines page 78

Product Technical Specification & Customer Design Guidelines
78 Proprietary and Confidential - Contents subject to change
AT!DASCHAN=<channel>
d.
· See Table C-1
e. (GSM mode only)
AT!DAGSTXFRAME=0, 1, 3000, 0
AT!DASTXON
f.
g. (WCDMA mode only)
AT!DAWSTXCW=0
AT!DASPDM=2, 75
different offsets until desired Tx power is obtained.)
AT!DAWSPARANGE=3
h. Offset the tracking (If necessary, repeat with different offsets until the
desired frequency is obtained.)
(WCDMA mode) AT!DASPDM=4,35100
(GSM mode) AT!DASPDM=0,2240
i. Take the measurement.
AT!DASTXOFF
j.
3. Test limits — Run ten or more good DUTs through this test procedure to
obtain a nominal output power value.
· Apply a tolerance of
setup design).
· Monitor these limits during mass-production ramp-up to determine if further
adjustments are needed.
· For GSM mode, the transmit signal is bursted, so the transmit power will
appear averaged on the power meter reading.
Note: The module has a nominal output power of +23 dBm
However, the value measured by the power meter is significantly influenced (beyond the

stated 1 dB output power tolerance) by the test setup (host RF cabling loss, antenna
efficiency and pattern, test antenna efficiency and pattern, and choice of shield box).
Note: When doing the same test over the air in an RF chamber, values are likely to be
significantly lower.
(Set modem channel)
for appropriate <channel> values
(Set Tx frame structure.)
(Turns on the transmit path.)
(Use a modulated carrier.)
(Set the power level. Repeat command with
(Set to high PA gain state.)
(Turn off the transmitter.)

5 to 6 dB to each measurement (assuming a good

1 dB in WCDMA mode.
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