User's Manual

Table Of Contents

Ver.

CHAPTER 3. System Structure

2600-00FKQFGA2

1.0

Reset Function

The L7IA can reset the hardware remotely. The reset command is transmitted to the

system’s CPLD upon the LSM’s command, and the CPLD monitors it and resets the board

power.

Filter and LNA Function

The L7IA includes a filter and LNA, and suppresses the out-of-band spurious wave

radiation.

The L7IA supports the RF path of 2Tx/2Rx. In the downlink path of the L7IA, the high-

power amplified RF signal is transmitted to the antenna through the filter after satisfying the

spectrum mask defined for each region. In the uplink path of the L7IA, the RF signal

received via the filter is transmitted to the digital processing part of the L7IA through low-

noise amplification in the LNA.

Power

The Indoor Pico Cell is supplied with power through the AC adapter. The L7IA uses the 12

VDC received via an external AC adapter. After receiving the 12 VDC power input, it

generates the power required in the L7IA through the DC/DC converter.

Figure 13. Power Supply Configuration

5.5 V

5 V

3.8 V

3.3 V

2.5 V

1.8 V

1.5 V

1.2 V

0.9 V

0.75 V

Power Block

DC/DC

Converter

AC Adaptor

(DC 12 V)

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