Specifications

Testing

Rev 2.0 Apr.10 Proprietary and Confidential 77

b. Zero-calibrate the meter.

c. Enable MAP mode.

Note: These AT

commands generate a

modulated test signal.

2. Prepare the DUT using the following AT commands:

AT!OEM=176 (Unlock the extended AT command set)

AT!DIAG (Set modem in diagnostic mode)

AT!CHAN=600,1 (PCS band, channel 600)

AT!CHAN=384,0 (Cellular band, channel 384)

The power meter should read -100 dBm, indicating no signal.

AT!TX=1 (Turn on transmitter)

AT!ALLUP=1 (Enable “all ups” condition)

The power meter should read from 0–24 dBm, depending on your setup.

AT!TX=0 (Turn off transmitter)

3. Test limits—Run ten or more good DUTs through this test procedure 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—MC8xxx

Note: This procedure segment is performed in Step 13 of the Suggested production test

plan procedure on page 72.

Tabl e 8- 1 contains parameters used in the suggested test procedure that follows.

Table 8-1: Test settings—MC8xxx transmission path

Mode

Test