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Product Technical Specification & Customer Design Guidelines
78
Proprietary and Confidential - Contents subject to change
2400089
d.
AT!DASCHAN=<channel>
(Set modem channel)
·
See
for appropriate <channel> values
e.
(GSM mode only)
AT!DAGSTXFRAME=0, 1, 3000, 0
(Set Tx frame structure.)
f.
AT!DASTXON
(Turns on the transmit path.)
g.
(WCDMA mode only)
AT!DAWSTXCW=0
(Use a modulated carrier.)
AT!DASPDM=2, 75
(Set the power level. Repeat command with
different offsets until desired Tx power is obtained.)
AT!DAWSPARANGE=3
(Set to high PA gain state.)
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.
j.
AT!DASTXOFF
(Turn off the transmitter.)
3.
Test limits — Run ten or more good DUTs through this test procedure to
obtain a nominal output power value.
·
Apply a tolerance of
5 to 6 dB to each measurement (assuming a good
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
1 dB in WCDMA mode.
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.