Cisco Cisco Prisma II EDR Receiver Data Sheet

 

2

 
 

 
Description 
The Prisma II

™

 platform is capable of utilizing a combination of modules which 

address a variety of applications.  The platform also supports important reliability-
enhancing features such as redundant power supplies, network switching, and 
element management (with ICIM).  The Prisma II Forward and Reverse Headend 
Driver Amplifiers (FHEDA and RHEDA) are designed to add to this flexibility. 
 
The FHEDA/RHEDA provide amplification and are typically an integral part of the 
RF network in the headend or hub.  The FHEDA/RHEDA feature a firmware 
controllable, variable attenuator and equalizer to provide optimum signal levels. 
The FHEDA/RHEDA are powered externally by the Prisma II power supply, which 
reduces heat and extends the life of the amplification circuit. 
 

 
Features 

•  Designed to operate in the Prisma II platform 

•  Compact size saves headend space 

•  46 to 1002 MHz pass band (FHEDA) 

•  5 to 200 MHz pass band (RHEDA) 

•  Internal current-sensing circuitry monitors the operation of the amplification circuit 

•  Full ROSA / TNCS control & monitoring capable 

•  Variable Gain (14 to 24 dB) and Variable EQ (0 to 9 dB) 
 
 
Forward and Reverse Headend Driver Amps 

Variable

Attenuator

RF Input

Test Point

Microprocessor

RF Output

RF Input

ICIM

Front Panel

(optional module)

LCI User

Interface Connector

(on chassis)

Variable

Equalizer

Composite RF

Output

Dectector

Amplifier