Specifications

AirPrime Embedded Module Hardware Integration Guide
80 Proprietary and Confidential 2130114
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!OEM=176 (Unlock the extended AT command set.)
b.
AT!DIAG (Set the modem in Diagnostic 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)
Note: The dBm value displayed is calculated to reflect the power at the input connector.
f. AT!RX2=1 (Turn on diversity receiver.)
g.
AT!RX2AGC? (Read back the power level, in dBm, from the diversity
receiver.)
Response examples:
· RX2AGC = 0xFFFFFF76 = -84 dBm (Signal generator’s RF port is
OFF)
· RX2AGC = 0xFFFFFFC6 = -69 dBm typical (Signal generator’s RF port
is ON)
h.
AT!RX=0 (Turn off main receiver.)
i.
AT!RX2=0 (Turn off diversity receiver.)
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 should be at least -50 dBm.
· Monitor these limits during mass-production ramp-up to determine if further
adjustments are needed.
Note: The value measured by the DUT depends on the test setup and DUT design. Host
RF cabling loss, antenna efficiency and pattern, test antenna efficiency and pattern, and
choice of shield box all significantly influence the measurement.
Note: When doing the same test over the air in an RF chamber, values are likely to be
significantly lower.