User's Manual
Table Of Contents
- EX-i Series (TDD)
- Digital Microwave Radios
- Installation and Management Guide
- Legal Notice
- Open-Source License Information
- Table of Contents
- List of Figures
- List of Tables
- About this Document
- Introduction
- Pre-installation Tasks
- Link Engineering and Site Planning
- Familiarization with the i-Series Radios
- Initial Configuration and Back-to-Back Bench Test
- RF Output Power Setting
- Time Division Duplex (TDD) Factors
- Link Orientation and Synchronization
- Radio Synchronization
- Offset Timing
- Virtual Local Area Network (VLAN)
- Link Symmetry
- Simple Network Management Protocol (SNMP)
- System Installation and Initiation Process
- Installation
- Configuration and Management
- Command Line Interface (CLI)
- Telnet into the Command Line Interface (CLI)
- Exalt Graphical User Interface (GUI)
- Quick Start
- Navigating the GUI
- Radio Information Page
- Administration Settings Page
- Simple Network Management Protocol (SNMP) Configuration
- File Transfer Page
- File Activation Page
- Access Security Page
- System Configuration Page
- MHS Configuration Page
- Ethernet Interface Configuration Page
- VLAN Configuration Page
- T1/E1 Configuration Pages
- DS3 Configuration Page
- GPS Information Page
- Alarms Page
- MHS Status Page
- Performance Page
- Event Log Page
- User Throughput Page
- Diagnostic Charts Page
- Spectrum Analyzer Page
- Ethernet Utilization Page
- Reboot Page
- Manual Page
- Specifications
- Interface Connections
- DIP Switch Settings (-16 Models Only)
- Antennas
- DC Coupler for Antenna Alignment
- Troubleshooting
- Back-to-back Bench Testing
- General Compliance and Safety
- Dynamic Frequency Selection
- Safety Notices
- Regulatory Notices
- Regulatory Compliance
- Regulatory Domain Keys
- EIRP Limits for the United States and Canada
- EIRP Limits for the European Union and ITU Countries
- EIRP Limits for Australia
- Declaration of Conformity to the R&TTE Directive 1999/5/EC
- END USER AGREEMENT
- Copyright Notices
- Index
Exalt Installation and Management Guide
EX-i Series (TDD) Digital Microwave Radios
100 206501-019
2016-05-24
DC Coupler for Antenna Alignment
One challenge associated with an all-indoor radio construction is the alignment of the antennas. It can
sometimes be challenging to place the radio near the antenna alignment personnel, and can also be
challenging to run a separate set of wires for the voltmeter to be in view of the alignment personnel. If
any of the conventional methods mentioned in the manual are difficult to achieve, one of the simplest
methods to use is to employ the use of a DC coupling system as a temporary test configuration
exclusively for the purpose of aligning the antennas.
This type of system simply couples the DC voltage associated with RSL measurement at the radio
location, over the RF transmission line, up to the antenna port.
Required Items
The following items are needed for the DC coupling system, per radio end (double the quantities of
these items for a complete link for simultaneous use at both ends):
• 2ea DC couplers: mini-circuits ZNBT-60-1W
• 1ea BNC male-male extension cable: Pomona 2249
• 1ea BNC female-to-mini Bantam (stackable Pin-tip plugs): Pomona 3221
• 1ea BNC female-to-banana male: Pomona 5268
1
• 1ea digital volt meter
Interconnections
Connect the items as shown in Figure 64. For the coupler installation, ensure that the DC side of the
coupler is facing away from the radio and away from the antenna – towards the RF transmission line
system. Using the BNC adapters and cables, attach the radio end DC coupler to the RSL port on the
radio, and the antenna end DC coupler to the DVM that the antenna alignment personnel will use.
The DC voltage from the RSL port is now coupled to the transmission line system between the radio
and the antenna, and is available at the antenna location. This allows the antenna alignment personnel
to view the DVM output directly while adjusting the antenna.
Warning! Remove all DC-blocked lightning arrestors in the transmission system prior
to applying the DC coupler system. Failure to do so can result in electric shock and/or
damage to the lightning arrestors and/or other equipment.
1. This type of plug is typical for most professional hand-held digital volt meters (DVMs). However, verify
that your DVM can accept this type of Bantam connector. If not, a different part number or adapter may
be required to connect to the DVM.