Wcdma Receiver Bit Error Rate (Ber) Ok; Does The Phone Give Realistic Rssi-Values; Hinku (N7500) Or Rap3G (D2800) Faulty; Wcdma Tx Power And Transmit Frequency Ok - Nokia 6680 RM-36 Service Manual

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6.1 WCDMA receiver Bit Error Rate (BER) ok?

• This test needs a WCDMA communication tester and if there is no that kind of tester available
continue troubleshooting in section 4.2
Attach the phone to the product specific test jig and a GSM communication tester to the
•
RF-coupler. Coupler attenuation should be also taken into account during measurements. This
measurement should be done in an RF shielded box.
• Close the shield box hatch.
• Make a GSM call against the tester
Settings to the tester have to be done according to the 3GPP specifications:
•
Set base station output level (Îor) to -106.7 dBm / 3.84 MHz
-
Set DPCH_Ec level to -117 dBm / 3.84 MHz
-
• Bit Error Rate should be less than 0.1 %

6.1.1 Does the phone give realistic RSSI-values?

• See section 4.2

6.1.2 Hinku (N7500) or RAP3G (D2800) faulty?

• RAP3G is not possible to replace

6.2 WCDMA TX power and transmit frequency ok?

• See section

6.3 WCDMA Transmitter error vector magnitude ok?

• This test needs a WCDMA communication tester and if there is no that kind of tester available
continue troubleshooting in section 4.3
• Attach the phone to the product specific test jig and the WCDMA communication tester to the
RF-coupler. Coupler attenuation should be also taken into account during measurements. This
measurement should be done in an RF shielded box.
• Close the shield box hatch.
• Make a WCDMA call against the tester
• The Error Vector Magnitude shall not exceed 17.5 % with power levels ≥ –20 dBm.
If Error Vector Magnitude is not as expected separate the phone into parts and place to the
•
module jig (Notice that there are three antenna connectors in the module jig, one for GSM, one for
WCDMA and one for Bluetooth. Make sure that all connections are made to the correct RF-connector).
A-114
"Does the phone give realistic
4.1. "WCDMA TX power and transmit frequency ok?"
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Copyright © 2005 Nokia. All rights reserved
"Does the phone give realistic
RSSI-values?"
"WCDMA modulation spectrum and ACLR
Appendix A: RF Troubleshooting
RSSI-values?".
ok?"