Product Technical Specification & Customer Design Guidelines
80
Proprietary and Confidential - Contents subject to change
2400089
2.
Set up the DUT:
a.
AT!ENTERCND
(Unlock extended AT command set.)
b.
AT!DAFTMACT
(Put modem into factory test mode.)
c.
AT!DASBAND=<band>
(Set frequency band.)
·
See
for <band> values
d.
AT!DASCHAN=<channel>
(Set modem channel)
·
See
for <channel> values
e.
AT!DASLNAGAIN=0
(Set the LNA to maximum gain.)
f.
(WCDMA mode)
i.
AT!DAWGAVGAGC=9400,0
(For PCS1900, channel 9400 as an
example.)
(GSM mode)
ii.
AT!DAGSRXBURST=0
(Set to receive bursted mode.)
iii.
AT!DAGGAVGRSSI=190,0
(For channel 190, for example.)
The returned value is the RSSI in dBm.
3.
Test limits — Run ten or more good DUTs through this test procedure to
obtain a nominal received power value.
·
Apply a tolerance of
5 to 6 dB to each measurement (assuming a good
setup design).
·
Make sure the measurement is made at a high enough level that it is not
influenced by DUT-generated and ambient noise.
·
The Signal Generator power level can be adjusted and new limits found if
the radiated test needs greater signal strength.
·
Monitor these limits during mass-production ramp-up to determine if further
adjustments are needed.
Note: The value measured from the DUT is significantly influenced by the test setup and
DUT design (host RF cabling loss, antenna efficiency and pattern, test antenna efficiency
and pattern, and choice of shield box).
Note: Diversity is not
available in GSM mode.
4.
Test diversity paths:
a.
Set up the signal generator as in
.
Note: Setup of the DUT is
the same as in
except for a change to
AT!DAWGAVGAGC and
the addition of
AT!DAWSSCHAIN.
b.
Set up the DUT:
i.
AT!ENTERCND
(Unlock extended AT command set.)
ii.
AT!DAFTMACT
(Put modem into factory test mode.)
iii.
AT!DASBAND=<band>
(Set frequency band.)
·
for <band> values
iv.
AT!DAWSSCHAIN=1
(Enable the secondary chain.)
v.
AT!DASCHAN=<channel>
(Set modem channel)
·
for <channel> values
vi.
AT!DASLNAGAIN=0
(Set the LNA to maximum gain.)
vii.
AT!DAWGAVGAGC=9400,0,1
(The ‘1’ indicates the diversity path is
used.)
c.
Test the limits as in
