User's Manual
Table Of Contents
- Foreword
- Important Safety Information
- Contents
- About this Document
- Related Publications
- Product Description
- Features
- Specifications
- Air Interface
- Product Functionality
- Contents
- Integration Goal and Objectives
- Customer Problem Isolation
- Wireline and Wireless Communications
- Design Tips for Serviceability
- Environmental Issues
- Regulatory Requirements
- Contents
- Power Supply
- Host Interface
- Power Management
- Antenna Systems
- Hardware Recommendations
- Battery Selection Criteria
- Contents
- Hardware Integration
- Application Software
- Final Assembly
- Installation
- Troubleshooting
- End User Problem Resolution
- Service Depot Repair
- Contents
- Accessories and Options
- Abbreviations and Acronyms
- Desense Overview
- Desense Measurement Techniques
- Preparing the Device Under Test
- Performance Goals
- Methods of Controlling Emissions
- Antenna
- Summary
- FLEX Application Protocol Licensing
- Licensing
4-18 July 23, 2002
Hardware Integration CreataLink2 XT Hardware Integrator’s Guide
Power Management
save cycle parameter. Consult your network provider to determine current network
parameters.
During frames when the CreataLink2 XT device is in receive mode, the receiver
only stays powered through part of the frame, unless the frame contains a message
for the CreataLink2 XT device.
Message Traffic Model
The message traffic model defines the number of messages transmitted and
received, and the average length of the messages sent and received in a given work
day. A dispatch application might have a message traffic model as follows:
• Messages transmitted in 8-hour day = 5
• Average length of transmission = 1 kbytes to 2 kbytes
• Messages received in 8-hour day = 10
• Average length of received message = 100 bytes to 200 bytes
This analysis of message traffic provides the power consumption profile assessment
in terms of percentage of total time spent transmitting, receiving, and sleeping.
Use of Information Services
Some applications, such as a stock quotation broadcast service, require the use of
information services carried to the data transceiver via additional addresses (IDs).
Each active service address, in addition to the data transceiver factory-loaded
personal address, increases the percentage of time the data transceiver stays in the
receive state, and increases the overall current consumption. However, this
addressing type provides a method by which to address a group of CreataLink2 XT
devices.
Backup Battery Power/Transmitter Power
The undervoltage reset circuit of CreataLink2 XT device senses a low voltage
condition almost instantaneously. In an undervoltage condition, the data
transceiver is reset, and all information in RAM is lost, including any unread
messages or pending message transmissions. A backup battery connected across
pins 5 and 6 of the 22-pin connector can prevent this loss. For RAM backup only,
this voltage is required to be at least 3 Vdc and a maximum of 9 Vdc.
In addition, you can connect pins 5 and 6 to a power source for use during RF
transmissions and while receiving. If these pins are to be used for this purpose, then
the requirements for the voltage on this pin change. For RF transmissions to occur
reliably, a voltage in the range of 5 Vdc minimum to 9 Vdc maximum must be
applied. This power source will be required to source as much as 1.4A during RF
transmissions.