Specifications
Testing
Rev 8 Apr.14 Proprietary and Confidential - Contents subject to change 83
To test the DUT’s receive path:
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:
· -80 dBm (WCDMA mode)
· -60 dBm (GSM mode)
b. Set the frequency for the band being tested. See Table C-2 on page 82
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 Table C-2 on page 82 for <band> values
d.
AT!DASCHAN=<channel> (Set modem channel)
· See Table C-2 on page 82 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.