LG KE820 Service Manual page 130

9.2.5. Setup "Line System" menu such as the following figure
9.2.6.Setup Logic operation such as the following figure.
Adiust the number times.
PWR: Power Supply
CELL: Call-Test Equipment
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Operation Mode
1. By-Pass: not control by GPIB
2. Normal: control by GPIB
Setup UART Port
9. RF Calibration