LG T5100 Service Manual page 113

7. Service and Calibration
A. Target System Frame
This is for initializing the target phone. When you use this program to test T5100 phone, you have to
initialize target at first. To initialize target phone, select target (T5100 is default) and COM port used at
your computer and then click the Initialize button. If target initializing is ended successfully, the box in
red below the initialize button will turn into green.
B. RX AGC Test Frame
At this part, you can control receiver path of target phone.
Serving Freq. Setting (TCH)
You can set TCH of phone. The number means ARFCN of Traffic channel. You can change the value
by clicking arrow button by one step or just entering the number directly.
Beacon Freq. Setting (BCH)
You can set BCH of phone. The number means ARFCN of base station broadcasting channel.
AGC Value Setting
You can set AGC gain of phone. The number means gain of AGC amplifier in Rx path.
Power Measurement
The number means channel index according to pre-defined ARFCN. There are 12 pre-defined
ARFCNs within Rx band. 4 ARFCNs are for GSM and others for DCS. Clicking arrow button to change
number, you can see TCH and BCH ARFCN changed automatically. PM window displays the power
level measured in baseband chip. PM value is useful to calculate the received absolute power.
The unit of PM is dBd.
PM Start
You can measure Rx power that target received from test equipment. When you click this button the
result of power measurement displayed at PM blank in Power Measurement frame.
You can measure PM for all 12-channel indexes by changing Number and clicking PM Start.
Calculate
You have to do this work after measuring PM for all 12-channel indexes. When you click this button,
service software calculate the calibration data from measured 12 PM data.
Standalone
This button makes target operate in Rx mode continuously. Target will be operated under the condition
that you set. During continuous receiving mode, label of Standalone button is changed to Stop.
If you want stop receiving mode operating, click this button one more.
C. TX APC Test Frame
At this part, you can control transmit path of target phone.
Serving Freq. Setting (TCH)
You can set TCH of phone. The number means ARFCN of Traffic channel.
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