User's Manual
Table Of Contents
- Table of contents
- List of figures
- List of tables
- Introduction
- 1 NGTtransceiver compliance
- 2 Installation
- 3 The handset
- 4 Getting started
- Switching on the transceiver
- Changing the screen contrast
- Changing the screen brightness
- Using the keys on the handset
- Accessing the Main Menu
- Switching scanning on or off
- Switching mute on or off
- Entering your station self address
- Listen Before Transmit Mode
- Replacing LQA information for all channels in an ALE/CALM network
- Making a manual sounding operation in an ALE/CALM network
- Selecting the best channel in an ALE/CALM network
- Making a Selective call from the Address List
- Making a Phone call from the Address List
- Making an emergency call using the emergency key
- Using a special ALE address syntax to make a call
- Appendix A— Standard hot keys
- Appendix B— Entering and editing text
- Appendix C— Finding words and values
- Appendix D— Creating an entry in a list
- Appendix E— HF radio transmission
- Appendix F— Definitions
- Index
Getting started
42 NGT ASR Transceiver Getting Started Guide
Listen Before Transmit Mode
The NGT transceiver is capable of listening to a channel
before initiating a call on the channel. If the Cfg LBT Mode in
the Control List is enabled, the transceiver will detect whether
or not there is traffic on the selected channel, i.e. the channel is
occupied. The transceiver will listen on a channel for the
length of time specified in the Cfg LBT Period entry in the
Control List. The transceiver will try busy channels twice
before reporting that they are busy.
The Cfg LBT Mode may be set to Enabled, Override allowed,
or Disabled.
When the Cfg LBT Mode is set to Enabled, and the
transceiver detects that the channel(s) tried is(are) busy, it will
prompt you to try the call again. You can:
• press the key to try the call again using LBT
• press the key to select a new channel, then press the
key to make a call on this channel using LBT
NOTE
If you change the setting in the Cfg LBT Mode
entry in the Control List you must switch the
transceiver off then on again for the change to
take effect.
NOTE
If only one channel was tried and found to be
busy using LBT, you can listen for traffic on the
channel then, if clear, override LBT by holding
the key.