User's Manual
Table Of Contents
- HPT225BT*
- Table of Contents
- Preface
- FCC Class A Compliance
- Canadian Emissions Labeling Requirements
- Industry Canada
- WEEE Directive
- Introduction
- Configuration
- Command Line Interface
- Specifications
- Safety Warnings
- VHF Radio Usage
- Warranty Terms
Configuration
Configuring HPT225BT
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2. When finished, click FileDisconnect.
5.2. Half-Duplex Protocol
When the HPT225BT modem is loaded with special firmware which supports Half-duplex protocol
1
, the
ModemVU general window will be like below:
Figure 7. Radio Link tab. Half-duplex protocol
1. On the Radio Link tab, set the following parameters (Table 1) and click Apply:
Modulation type Specifies a modulation scheme that will be used by your modem.
DQPSK is recommended.
For both Base and Rover modems the modulation type must be the same.
Link Rate The link rate is selected automatically
Link Space For both Base and Rover modems the link space must be the same.
Forward Error
Correction
Enable Enable
Scrambling Enable Enable
1. In Auto mode rover receives the data from both base transmitter and repeater. The sophisticated algo-
rithm of data receiving allows the modem to eliminate any data doubling.
2. In this mode the incoming data from base transmitter will be ignored.
3. In this mode the incoming data from repeater will be ignored.
Parameter Base Modem Repeater Rover Modem
1. Half-duplex (HDX) operation means such operation in which communication between two terminals occurs in either direction, but in
only one direction at a time.