User Guide

NHB–3
Technical Documentation
PAMS
Tuning Instructions
Original 26/97
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5. Charge Voltage Adjustment
A reference value for charge voltage is set by using an accurate 6.0 V supply.
Calibration of the charge voltage:
– In case the phone covers are not removed replace the standard battery of
the phone with the dummy battery BTS–4.
– Apply +6 V to charger connector of the phone.
– Select adjustments menu option ”Charge Voltage Adjustment”.
– Program reads +6 V, A/D reading fed to charger input.
– Let the software measure a couple of seconds and press <ESC>.
– Store charge voltage value to phone EEPROM by pressing <Y>.
6. Battery Voltage Adjustment
A reference value for battery are calibrated by using an accurate 6 V supply.
Calibration of the A/D converter channels:
– In case the phone covers are not removed replace the standard battery
of the phone with the dummy battery BTS–4.
– Apply +6 V to dummy battery.
– Select adjustments menu option ”Battery Voltage Adjustment”.
– Program reads 6 V, A/D reading fed to phone VBAT line.
– Let the software measure a couple of seconds and press <ESC>.
– Store correct value to phone EEPROM by pressing <Y>.