Panasonic EB-GD75 Service Manual

Also see for EB-GD75: Operating instructions

Contents

ADJUSTMENT PROCEDURESIssue B Section 7 MCUK011201C8Revision 0 – 36 – Service Manual7 ADJUSTMENT PROCEDURES7.1. RF Calibration ProcedureThe following procedures MUST be performed after replacement or repair of the PCB. Failure to do so may result in incorrectoperation of the telephone.The following adjustments MUST be made on BOARD with 3.7 V DC applied directly to the battery connector.There are two distinct calibration procedures to adjust RF performance. These procedures are:1. Ramping gain (Section 7.2)2. RSSI (Section 7.3)Battery calibration includes checks on voltage, temperature and charging. These procedures are described in Section 7.4.Adjustment data selected during calibration is stored in Flash ROM.7.2. Ramping GainThe carrier power must be measured and calibrated for each power level at channel 62.7.2.1. E-GSM 900NOTE: See Section 6.2 for a list of the equipment and setup procedures required to perform the following adjustmentand calibration procedures.Power Level(PL)Output Power (dBm)Change / dBNominal Target SpecMin Max Min Max5 32.05 31.8 32.3 31.8 32.8 3.56 30.7 30.2 31.2 30.0 31.8 47 29 28.5 29.5 28 30 4.58 27 26.5 27.5 26 28 4.59 25 24.5 25.5 24 26 410 23 22.5 23.5 22 24 4.511 21 20.5 21.5 20 22 412 19 18.5 19.5 18 20 4.513 17 16.5 17.5 16 18 414 15 14.5 15.5 14 16 415 13 12.5 13.5 12 14 416 11 10.5 11.5 10 12 417 9 8.5 9.5 8 10 418 7 6.5 7.5 6 8 3.519 5 4.5 5.5 4 6 3.5