Nokia Customer Care Troubleshooting
Company Confidential TFE-4/RV-1
Issue 2.0 Mar/2005 Copyright © 2005 Nokia Corporation Page 6-17
Company Confidential
ATTENUATION SETTINGS:
The JBT-9 attenuation is used to reduce the BT RF range. The default factory setting of
internal attenuation results in a level of –36dBm (refer to chapter 5). This reduces the
typical RF range to less than 0.5 m. In case that distance is too short to perform tests
over the air, the internal attenuation can be changed as described in the JBT-9 sales
package user guide.
In case that a service jig is directly connected to the box SMA RF I/O connector, it is rec-
ommended to work with the maximum internal attenuation (default factory setting).
NOTE: When the JBT-9 is connected to the PC via AXS-4 serial cable and used as BT ser-
vice interface, the BT Phoenix driver is controlling the internal attenuation of JBT-9.
Details are described in chapter 4.
SETUP FOR BER TESTING
• Connect SMA stub antenna or service jigs’ BT RF cable to JBT-9’s RF/IO connector.
• Connect ACP-8x charger to JBT-9 power connector.
• Make sure that distance between phone and JBT-9 does not exceed ~ 0.5 m dis-
tance when using default attenuation setting.
• BER test result is OK when BER is less than 0.1%
• Note that the phone connection to the PC is specific to the tested phone. For details
refer to the related chapter in the service manual.
TESTING INSTRUCTIONS FOR BER-TESTING
• Make sure that the phone’s product support modules are properly loaded by Phoenix
SW.
• Choose “Testing” and “Bluetooth Locals”.
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