Calibration - LG F1200 Service Manual

12. SERVICE AND CALIBRATION
Power Level Setting
First, you have to choose operating mode (GSM or DCS,PCS) according to TCH and BCH
frequency that you selected before. Then select the Level and adjust the DAC value. Level
means GSM/DCS,PCS output power level. Usable range is 5 to 19 for GSM, 0 to 15 for
DCS,PCS. DAC value is a factor to determine output power. Its variable range is 0 to 1023.
Uplink Normal Burst test
You can also control the traffic slot number be using by changing TCS value. Because GSM has
8-time slot, TCS value varies 0 to 7. Pattern is to select data format that is transmitted. You can
send all data 0, or 1 or repeating of 1010. But it is good to you to using the default value because
data format doesn't affect to RF characteristics.
Test
Transmitting is started when you click this button. During Transmitting, label of Test button is
changed to Stop. If you want stop transmitting, click this button one more.
D. RF Parameter Download Frame
Saving epm file into Flash
When you have a epm file, contains calibrated data, and you want to download into target Flash,
check Flash and click File Download button. Then you can see RF parameters Save window.
Select epm file you want to save into Flash then click Open. During saving file into Flash, The
statement bar indicating download process is displayed under the RF Parameter Download
frame. As successfully ending download, information box will be appeared. Click Ok.
Saving Cal. Data to Flash
After Rx or Tx calibration, you can save the calibration results into Flash and epm file. Check
Flash and click Calib Save button. Then you can see RF parameters Save window. Write the file
name and click Save button.
E. User Command and Results Frame
Whenever you click button or make some event in service software, every ordered event is
displayed in this frame. You can also see calibration results here.
F. Ramp shape button
This button is for burst shape table. But it is deactivated in service software.

12.2 Calibration

12.2.1 Overview
The calibration values of the phone reside on the Flash. The contents of the Flash can be read by
the service software and saved as a file. This is advisable when there is need to retain that
information, e.g. in view of replacement of the circuit. The program also enables writing the default
parameters on the Flash, in which case all calibration steps should be carried out. The service
software can't control the equipment, so only manual calibration process is possible.
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