LG KM710 Service Manual - Page 17

Transmitter part

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3. HW Circuit Description 3.2.2 Transmitter part The B6PLD transmitter is capable of both GMSK and 8-PSK modulation, to support for conventional GSM and EDGE. B6PLD integrates all loop filters to configure both PM loop and AM loop. See block diagram below. Fig. Simplified Block diagram for Tx part 3.2.2.1 Polar Loop Structure Three main functions are identified in the transmitter architecture; I/Q vector modulation at IF frequency, amplitude and phase loop at IF/RF frequencies and power amplification. LGE Internal Use Only - 18 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes

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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
3. HW Circuit Description
- 18 -
3.2.2 Transmitter part
The B6PLD transmitter is capable of both GMSK and 8-PSK modulation, to support for conventional
GSM and EDGE. B6PLD integrates all loop filters to configure both PM loop and AM loop. See block
diagram below.
3.2.2.1 Polar Loop Structure
Three main functions are identified in the transmitter architecture; I/Q vector modulation at IF
frequency, amplitude and phase loop at IF/RF frequencies and power amplification.
Fig. Simplified Block diagram for Tx part