User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 42
Original 11/97
TX Offset calibration steps & equipment:
– Using the JBS–7 service jig, replace the standard battery of the phone
with the dummy battery BTS–4.
– Apply +6.0 V to dummy battery.
– Connect the Current meter in line with the power supply to the phone.
– Connect the modulation (or spectrum) analyzer to antenna connector
and measure transmitter power.
– Select ” Tuning – Digital Bias”
– Enter the current draw measured from the current meter into the dia-
log prompt and press <OK>.
– Use the Up, Dn Keys to adjust the “Present Bias Value” until the Cur-
rent draw is within 5 mA of the “Target Bias Current”.
– Enter the actual current measurement into the “Actual Current” box.
– Press TAB to highlight the “Present Output Power” box.
– Use the Up, Dn Keys to adjust the “Present Output Power” value until
a the measured Transmitter output is within the “Target Output Power”
range.
– Enter the actual power measured into the “Actual Power” box.
– Press <save> to store value to EEPROM or <close> to exit without
saving.
– Repeat the above process for Step 2 using the associated Target val-
ues.