Fmtx Transmitter Tuning And Power Measurement In Testing And Tuning Tool - Nokia RM-596 Service Manual

RM-596
BB Troubleshooting and Manual Tuning Guide
8. Set frequency to near the top of the band (107 MHz) and press the Activate button again.
9. Press the Read button and record 'Antenna Tuning Value'.
Results
The test limits for the antenna tuning varactor value are product specific.
Frequency
92 MHz
107 MHz
The default value (displayed when there is no antenna present) is 0...2. If both values are 0...2, this
indicates there is a poor connection between the FMTX antenna and the Bob ASIC.

FMTX transmitter tuning and power measurement in Testing and Tuning Tool

Context
Note: RF cables and adapters have some losses. They have to be taken into account when the FMTX
is measured. Approximately, the FMTX RF loss in the MJ-241 test jig is around 24 dB. Cable
attenuations have to be taken into account separately.
FMTX has been tuned correctly in production. There is no reason to do re-calibration unless the memory
(D3000) is corrupted. But it is a good way to ensure the RF performance by these tuning and power
measurements.
FMTX can be tuned and measured automatically with Testing and Tuning Tool. Actually it performs output
power level writings and measurements for FMTX. The results are displayed and logged in a result file, if
initiated.
For hardware requirements for auto tuning, please refer to
jig in section 'Service Tools and Service Concepts'.
Steps
1. Make sure the phone is connected to the PC.
2. Connect the RF cable between the MJ-241 test jig (SMA RF connector located next to the BT/WLAN/GPS
antenna connector) and the communication tester.
Issue 2
Table 9 Antenna tuning value limits for RM-596
Low limit
80
35
COMPANY CONFIDENTIAL
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Antenna tuning value
126
1
RF testing and BB/RF tuning concept with module
High limit
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