User's Manual
Table Of Contents
- Installation
- Overview AS4000
- Overview AS4020
- Preparation
- Rack Installation
- AS4000 AC Rack Cabling and Wiring
- AS4000 CT Shelf Cabling and Wiring
- _
- Expansion Rack Cabling
- Setup and Test
- System Testing
- AS4000 AC Setup and Test
- Access Concentrator: Turn-Up and DC measurements
- Setting Up the Access Concentrator
- _
- Setting the TEI and Baud Rate for Netspan Connection
- Creating AC Shelf/Rack on Sitespan
- Setting up AC Rack and Shelf configuration
- Configure AC Cards
- Configure AC Shelf properties
- Check Boot Sequence
- Alarm and Status Indications (Test 3)
- Self Test (Test 4)
- Test CTU cabling to the DDF E1 Cards
- Test CTU cabling to the Distribution Frame (DDF) GR303 Cards.
- Test XTU cabling to the DDF
- Connecting the AC to the Network
- Connect E1s/T1s to the Switch or Cross-Connect at the DDF
- Access Concentrator Rack Commissioning Test Results
- AS4000 CT Setup and Test
- AS4020 CT Setup and Test
- _
- General
- Repair and Return Procedure
- Repair Charges
- Return & Repair Tag
- Packing and Shipment
- Glossary
- Index
Printed Documentation
60
Antenna Configurations
AS4000
This section describes the various antenna configurations and modifications needed to the
baseband wiring if the AS4000 CT rack is configured so that the two modem shelves serve
separate directional antenna. and the subsequent connection arrangements when an
expansion rack is fitted.
1. Standard configuration for Antenna (omni or sectored) using 2 RFs on one Antenna
initially and 2 RFs per antenna when an Expansion Rack and second Antenna are
added
Figure 1 Combiner Shelf Ribbon Connections Before Modification
2. Rack Modification for two separate directional Antenna using 1RF per Antenna
initially and 2 RFs per sector when an Expansion Rack is added
The modification consists of re arranging the baseband cables from the modem shelves such
that the bottom shelf in the CT rack now connects to RF Card 3 and consequently will feed
into the antenna connected to DIP/LNA 2. If an expansion Rack is fitted then the top shelf
connects to RF Card 2 and will feed into the antenna connected to DIP/LNA 2. A block
diagram of the system after modification is shown below.
Modification to CT Rack