Vpa Level; Rf Tuning And Testing; Rf Auto Tuning And Testing With Nokia Care Suite - Nokia RM-596 Service Manual

RM-596
Cellular RF troubleshooting
The WCDMA transmitter has to be activated before the VDCDCA supply voltage can be measured. Follow the
instructions given in chapter 'Manual transmitter (TX) testing with Phoenix → 'WCDMA transmitter activation'.
Note: The VDCDCA signal is continuously on when WCDMA TX is activated.

VPA level

The GSM or WCDMA transmitter has to be activated before the VPA supply voltage can be measured. Follow
the instructions given in chapter 'Manual transmitter (TX) testing with Phoenix → GSM transmitter activation'
or 'WCDMA transmitter activation'.
Check the VPA voltage level at C7514.
In WCDMA mode, the voltage levels should be:
• 0.4...0.8 V @ Start level 0 dBm
• 0.8...1.3 V @ Start level 10 dBm
• 3.0...4.2 V @ Start level 24 dBm
In GSM mode, the voltage levels should be:
• 0.1...0.5 V @ GSM 900 & Tx Power Level 19
• 0.5...1.1 V @ GSM 900 & Tx Power Level 12
• 3.5...4.3 V @ GSM 900 & Tx Power Level 5
Note: The VPA signal is continuously on when WCDMA TX is activated, but has a pulsed nature in
GSM TX mode (the signal is on only when a GSM TX burst is transmitted).
Note: The VPA signal is not tested by ST_CDSP_RF_SUPPLY_TEST.

RF tuning and testing

RF auto tuning and testing with Nokia Care Suite

Introduction to cellular RF tunings
RM-596 cellular RF engine has been tuned correctly in production. There is no reason to do re-calibration
unless one or more of the RF components are changed or memory (D3000) is corrupted.
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