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1. Click the "Check Connection" button.
2. Click the "Non-Signaling Mode" button
3. Select "TSC=5" (Make sure the call box has the same setting for TSC)
4. Check the Random of the GMSK Mode.
5. Check the "1900 Band" box to the right of the TX ARFCN box. (Very important Not checking this box will cause the phone
to transmit in the DCS band instead of the required PCS band)
6. Type "810" in the TX ARFCN box and press ENTER (on the keyboard).
7. Select "15" in the PA Level box and press ENTER (on the keyboard)
8. Click the "Burst Tx" of the RF Mode. This enables the transmitter. Check that a Tx signal is seen on the GSM Test Unit.
Measure the frequency error. A calibrated VCTCXO should provide a frequency error within ± 800 Hz at room temperature.
9. The frequency (and therefore the VCTCXO) is adjusted by charging the AFC DAC value in PhoneTool.
Adjust the AFC DAC value until the frequency error measured on the GSM Test Set is within ± 800 Hz.
Note the DAC value required.
10. Check the frequency error displayed GSM Tester and stop transmit by checking "General off".
Note: Transmit time should be within a few seconds. Because frequency error will change and this make the calibration
error. This is caused by the temperature of transmit.
11. Click set and store.
12. Click Write All.
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