Digital Equipment ChannelWorks DECTV-AA, Руководство по установке, Страница: 35 / 106

3-1
3
Preparing the Cable TV Network
Introduction
This chapter covers the following topics:
• Installing and setting the translator’s forward and return frequency switches
• Verifying the translator’s output signal level
• Attaching the translator to the cable TV network
• Performing cable TV network verification tests
Setting Up The Headend Translator
The translator that this chapter describes is the single channel, frequency agile Trans-
Master, shown in Figure 3-1. The TransMaster receives inbound transmissions and
performs a frequency shift to outbound transmissions. The TransMaster consists of an
input-to-intermediate frequency (i.f.) converter and an i.f.-to-output converter. Trans-
Master has Surface Acoustic Wave (SAW) filtering with 5.2 MHz i.f. bandwidth, suit-
able for most translator applications; and manual gain control.
During verification of the cable TV network’s signal levels, you must perform the pro-
cedures at the final operating frequencies.
Working with the cable TV operator, select a location for the TransMaster and install it.
Do not connect it to the cable TV network.
Verifying And Setting Up Test Equipment
Chapter 1 provides a list of required tools and equipment to install the ChannelWorks
Bridge. The equipment should be calibrated according to the manufacturer’s instruc-
tions.