User's Manual

Testing
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 79
To test the DUT’s receive path (or diversity path, while connected to the diversity
antenna):
Note: This procedure
describes steps using the
Agilent 8648C signal
generator
— the Rohde &
Schwarz SML03 is shown
for reference only.
1. Set up the signal generator:
a. Set the amplitude to -70 dBm
b. Set the frequency for the band being tested. See Tab l e C-1 for frequency
values.
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 Ta ble C-1 on page 78 for <band> values
d. AT!DASCHAN=<channel> (Set modem channel)
· See Ta ble C-1 on page 78 for <channel> values
e. AT!DALGAVGAGC=<channel>,0 (Get averaged Rx AGC)
· See Ta ble C-1 on page 78 for <channel> values
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.
a. All values offset from actual center channel by +2 MHz
b. Channel values shown are at the center of the corresponding bands.