90PF Slot Card

Dual Channel Programmable

Introduction

Filter/Amplifier Card

P89C660

25C080

Post-G ain

Filter M odule

Pre-G ain

Post-G ain

Filter M odule

Pre-G ain

Signal

Input 1

Signal

Input 2

Signal

Output 1

Signal

Output 2

Channel

One

Channel

Tw o

CPLD

BYPASS

14

6

14

10

ACTIVE

BDREJECT1

BYPASS

ACTIVE

BDREJECT2

CH2_NO_CASCADE

DAC

CPLD

SPI BUS

CPLD

DAC

DAC

DAC

AT25256

32-PIN CONNECTOR

TO BACKPLANE

19

20

EEPROM for FILTER CODE

EEPROM for PARAM ETERS

2

2

BNC

BNC

BNC

BNC

6

10

CPLD

Figure 1 – Signal Path

2

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• Web Address: http://www.freqdev.com