CDMA and GSM / UMTS Mini Card Hardware Integration Guide
86
Proprietary and Confidential
2130114
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Note: These AT commands
generate a modulated test
signal.
2.
Prepare
the
DUT
using
the
following
AT
commands:
a.
AT!OEM=176
(Unlocks
the
extended
AT
command
set)
b.
AT!DIAG
(Set
modem
in
diagnostic
mode)
c.
AT!CHAN=600,1
(PCS
band,
channel
600)
or
AT!CHAN=384,0
(Cellular
band,
channel
384)
The
power
meter
should
read
‐
100
dBm,
indicating
no
signal.
d.
AT!TX=1
(Turns
on
transmitter)
e.
AT!ALLUP=1
(Enables
all
ups
condition)
The
power
meter
should
read
from
0–24
dBm,
depending
on
your
setup.
f.
AT!TX=0
(Turns
off
transmitter)
3.
Test
limits:
Run
ten
or
more
good
DUTs
through
this
test
proce
‐
dure
to
obtain
a
nominal
output
power
value.
·
Apply
a
tolerance
of
±
5
to
6
dB
to
each
measurement
(assuming
a
good
setup
design).
·
Monitor
these
limits
during
mass
‐
production
ramp
‐
up
to
determine
if
further
adjustments
are
needed.
Note: The MC57xx has a nominal output power of +24 dBm
±
1 dB.
However, the value measured by the power meter depends on the
test setup (RF cable loss, couplers, splitters) and the DUT design.
Note: When doing the same test over the air in an RF chamber,
values are likely to be significantly lower.
Testing RF transmission path—MC87xx
Note: This procedure segment is performed in Step
of the
(
).
contains
parameters
used
in
the
suggested
test
procedure
that
follows.