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”.