Cisco Cisco Prisma II ICIM 2 Installation Guide
1-4
Introduction
78-715189-01 Rev C
HEDA Description,
Continued
Forward HEDA Block Diagram
A block diagram of the Prisma II Forward Headend Driver Amplifier is shown
below.
Reverse HEDA Block Diagram
A block diagram of the Prisma II Reverse Headend Driver Amplifier is shown
below.
Amplifier
1 dB Step Equalizer
(0.0 - 5.0 dB)
RF Input
RF Output
1 dB Step PIN
Attenuator
(0 - 3 dB)
-20 dB Front Panel
Test Point
Current Sense Alarm
B
A
Amplifier
Variable Equalizer
(0.5 - 5.5 dB)
RF Input
RF Output
1 dB Step PIN
Attenuator
(0 - 3 dB)
-20 dB Front Panel
Test Point
Current Sense Alarm
B
A