Adjustment Procedure; Equipment Setting For Tx/Rx Adjustment; Main Subjects - Panasonic GSM EB-A100 Service Manual

8.3. Adjustment Procedure

8.3.1. Equipment Setting for TX/RX adjustment

PC
1. Connect all equipments as above.
2. Please set the cable loss within the GSM tester before proceeding to any tests. It's recommended that each band (GSM 900
/DCS 1800/PCS 1900) tested separately.
3. Power on the handset before executing the main program.
4. Change the handset comport setting: *#369# -> Com port -> GENIE
Notice:
1. Please make sure the RF probe contacts properly during the test process.
2. Remember to set the handset comport setting back to "Off" after adjustment, or it will cause malfunction to earphone.

8.3.2. Main Subjects

<A> TX Power
TX Power Scaling Factors
TX Freq Compensation
<B> RX RSSI (Received Signal Strength Indication)
Accurate Gain Control
RX Freq Compensation
<C> Battery Calibration
Band TX/Fu(n)
E-GSM900 Fu(n) = 890+0.2*n
Fu(n) = 890+0.2(n-1024)
DCS1800 Fu(n) = 1710.2+0.2(n-512)
PCS1900 Fu(n) = 1850.2+0.2(n-512)
ARFCN : Absolute Radio Frequency Channel Numbers
Power Supply
3.8 V
D/L Cable
Dummy Battery
RX/Fl(n)
Fl(n) = Fu(n)+45
Fl(n) = Fu(n)+95
Fl(n) = Fu(n)+80
– 8-4 –
GSM Tester
RF Cable
ARFCN
0 < n < 124
975 < n < 1023, Middle: 37
= =
512 < n < 885, Middle: 698
= =
512 < n < 810, Middle: 661
= =