Nokia N900 Service Manual page 106

TX tests
Prerequisites
Connect complete phone assembly with battery cover to a PC with Phoenix service software using a USB data
cable.
From the testing toolbar select WLAN Tx Test option shown below. This test can be used to verify TX
configuration and functionality. The default settings are sufficient for testing the TX operation, although
other channels and data rates are equally suitable. To start the test, select the Start option button:
1 Monitor the WLAN TX spectrum on a Spectrum analyser. (When making a radiated test ensure that other
WLAN devices are not transmitting as these may be detected as well, confusing the result). A typical
11MBPS TX spectrum is shown in figure below.
2 To finish the test select the Finish option button.
The difference between the two readings should be approximately 150mA and measures the transmit current
in 11MBPS, 802.11b mode of operation.
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