Testing Rf Receive Path-Mc87Xx - Sierra Wireless MC5725 Hardware Integration Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
90
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
AT!RX2AGC?
g.
from the diversity receiver)
Response examples:
· RX2AGC = 0xFFFFFF76 = ‐84 dBm (when signal
generator's RF port is OFF)
· RX2AGC = 0xFFFFFFC6 = ‐69 dBm (when signal
generator's RF port is ON) typical
AT!RX=0
h. (Turns off main receiver)
AT!RX2=0
i.
3. Test limits
Run ten or more good DUTs through this test proce‐
dure to obtain a nominal received power value.
· Apply a tolerance of
(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 signifi-
cantly influence the measurement.
Note: When doing the same test over the air in an RF chamber,
values are likely to be significantly lower.
Testing RF Receive path—MC87xx
Note: This procedure segment is performed in Step
Suggested test plan procedure (page
Table 8‐2 contains parameters used in the suggested test
procedure that follows.
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(Reads back the power level, in dBm,
(Turns off diversity receiver)
±
5 to 6 dB to each measurement
84).
14 of the
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