User's Manual

Testing
Rev 4 Sep.11 Proprietary and Confidential - Contents subject to change 77
8. Use the down-arrow key to select Save setup as dfl.
9. Select Exit.
Testing CDMA RF Receive path
Note: This procedure segment is performed in Step 13 of the Production test procedure on
page 74.
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:
Note: This example setup
uses a 200
kHz offset from
band center for testing
using a continuous wave
—
you can use any appro-
priate baseband frequency
offset (for example,
100
kHz, 300 kHz, etc.). 

If using a modulated
signal, set the frequency to
band center with no offset.
a. Press the Frequency button to set the frequency to 1960.200 MHz for PCS
band, Channel 600, or 881.720
MHz for Cellular band, Channel 384
b. Press the Amplitude button to set the amplitude to -55.0 dBm.
c. Press the RF ON / OFF button to enable or disable the RF port of the signal
generator.
2. Read back the power level from the main receiver:
a. AT!ENTERCND (Unlock the extended AT command set.)
b. AT!DAFTMACT (Enter test mode.)
c. AT!CHAN=600,1 (PCS band, channel 600)
or 
AT!CHAN=384,0 (Cellular band, channel 384)
d. AT!RX=1 (Turn on the main receiver.)
e. AT!RXAGC? (Read back the power level, in dBm, from the main receiver.)
Response examples:
· RXAGC = 0xFFFFFF33 = -77 dBm (Signal generator’s RF port is
OFF)
· RXAGC = 0x0021 = -60 dBm typical (Signal generator’s RF port is
ON)