Installation Guide
Table Of Contents
- Important Safety Instructions
- Introducing the Addressable Multimedia Stretch Tap
- Introduction to This Document
- Who Should Use This Document
- Qualified Personnel
- Scope
- Document Version
- Installing the Tap
- Overview
- Tools and Torque Specifications
- Preparing for Installation
- Removing the Faceplate
- Installing the Stretch Tap on a Strand
- Installing the Stretch Tap in a Pedestal
- Installing Optional Modules
- Installing the Tiering Filter Module
- Installing the Reverse Conditioning Pad
- Mounting the Faceplate
- Connecting Coax Drop Cables
- Replacing the Local Oscillator Module
- Replacing the Power Supply
- Customer Support Information
- If You Have Questions
- Appendix A Technical Information
- Glossary
- A
- ac, AC
- AC/RF byass switch
- addressable
- aerial mount
- amplifier
- AMST
- attenuation
- attenuator
- ATX
- bit
- broadband
- CATV
- dB
- DC
- dc, DC
- DC/EQ
- decibel
- directional coupler (DC) module
- drop amplifier
- drop cable
- equalization
- equalizer
- F-connector
- FCC
- forward path
- frequency
- FSK
- ft-lb
- GHz
- GND
- headend
- HFC
- Hz
- in-lb
- ingress
- LCSI
- LED
- LO
- MHz
- MST
- MTS
- N-m
- passive
- PCB
- pedestal mount
- PTC
- PWB
- reverse path
- RF
- RMA
- SCTE
- splitter
- strand mount
- tap
- tilt
- torque
- trap
- UL
- V
- V AC
- V DC
- W
- Index
Optional Modules
78-4002497-01 Rev F 7
Optional Modules
The tap accepts several types of modules that define specific tap functions.
Directional Coupler (DC)
The plug-in directional coupler (DC) module sets the tap value. The orientation of
the DC determines the RF flow through the tap. The DC is a plug-in module that is
installed in the field. Refer to Installing Optional Modules (on page 28) for
installation instructions. Refer to Tap Part Numbers (on page 44) for a listing of
available tap values.
Directional Coupler/Equalizer (DC/EQ)
The DC/EQ functions like a DC, but includes a fixed equalizer on its tap port that
increases loss at lower frequencies. The additional low-frequency loss forces a
greater percentage of an HFC system's auto leveling home communications
terminals (such as cable modems and addressable set-tops) to transmit their reverse
signals at desirable high levels. This improves carrier to "drop induced" ingress
ratios.
The DC/EQ can equalize the tap port from 5 MHz to 1 GHz in steps from 3 dB to 18
dB. The signal down the line is not affected. The DC/EQ is a plug-in module that
can be installed in the field. Refer to Installing Optional Modules (on page 28) for
more information.