Func t i o n a l De s c r i pt ion

ISL837030, ISL83740

4

FN8013.5

FIGURE 3 Modem Printed Circuit Board Assembly (PCBA)

FPGA

Decimating

Matched

Filter

ISL87060MIK

Modulator

ISL87060DIK

Demodulator

ADC

DAC

DAC

Trim

D6

D5

FPGA

Rate

Exchange

D4

FLASH

Memory

Controller

D1

D3

DAC

MUX

MUX

MUX

MUX

LED INDICATORS

LIGHT INDICATORS

D1 Controller Status

Blinking indicates controller is functional. Solid off or on indicates not functional.

D3 Modem Ready

Light on indicates modem is ready to accept user commands. Equivalent to the

MODEM_RDY

signal on the interface connector.

D4 PLL Lock Detect

Light on indicates that the modulator rate exchange has successfully locked to

the interface input byte clock.

D5 Alarm IRQ

Light on signals active alarm condition. Equivalent to the IRQ signal on the

interface connector.

D6 Demod Lock

Light on indicates that the demodulator has successfully locked to the input

baseband signal.