Auto tuning procedure
1 Make sure the phone (in the jig) is connected to the equipment. Otherwise some menus will not be shown
in Phoenix.
2 To go to autotune, select Tuning (Alt-U)
→
Auto-Tune (Alt-A) from the menu.
3 Start autotuning by clicking the
Tune
button.
Self Test Troubleshooting
Troubleshooting with RF Self tests
Context
Vapaus (N7500) RF ASIC contains test structures that can be used to detect certain RF related errors. In order
to use these self tests most efficient way, it is very important that the tests are performed in a certain order,
or at least that the error data is analyzed in this order. The tests are designed so that by going through them
in this order it is easy to find the problem component without any redundant checks. The flowchart presented
in this document is based on that idea. So, if RFBUS fails , there is no need to spend time wondering why
there is no power at TX, etc.
The testing order recommended and used in this troubleshooting guide is the following:
1 ST_CDSP_RF_BB_IF test (86)
•
Tests the functionality of the BB/Vapaus serial interface & Reset lines.
•
If this test fails, it means that there is a problem in programming of the N7500 and all of the following
tests can not give correct data.
2 ST_CDSP_RF_SUPPLY_TEST (83)
•
Tests the functionality of N7500 bias block, regulators, reference voltage line and, supply connections.
•
If these fail, all other N7500 tests can/will fail.
3 ST_CDSP_TX_IQ_TEST (85)
•
Test checks that the TXIQ lines between BB and N7500 are properly connected.
•
If this fails also power tests and RXIQ loopback will fail.
4 ST_CDSP_TXC_DATA_TEST (74)
•
This tests that the TXC line between AVILMAS (N2200) & Vapaus (N7500) is properly connected.
•
If this fails TX power tests will also fail.
5 ST_CDSP_RX_PLL_PHASE_LOCK_TEST (79)
•
Tests the functionality of RX PLL.
•
If this fails none of the RX related measurements can be trusted.
6 ST_CDSP_TX_PLL_PHASE_LOCK_TEST (80)
•
Tests the functionality of TX PLL.
•
If this fails the TX power tests will also fail.
7 ST_CDSP_TX_WCDMA_POWER_TEST (75)
•
Checks the output power of the WCDMA transmitter.
8 ST_CDSP_RX_IQ_LOOPBACK (81)
•
Tests that the RXI lines and VREFCM line between BB and N7500 are connected.
9 ST_CDSP_TX_GSM_POWER_TEST (77)
•
Checks the output power of the GSM transmitter.
RM-505; RM-506
RF Troubleshooting
Issue 1
COMPANY CONFIDENTIAL
Page 4 –7
Copyright © 2009 Nokia. All rights reserved.
