User's Manual
Table Of Contents
- Declaration of Conformity
- Important Safety Information
- Software Version
- Informations importantes sur la sécurité
- Version du logiciel
- Computer Software Copyrights
- Documentation Copyrights
- Disclaimer
- Getting Started
- Preparing Your Radio for Use
- Identifying Radio Controls
- Identifying Status Indicators
- General Radio Operation
- Advanced Features
- Advanced Call Features
- Contacts
- Scan Lists
- Scan
- Call Alert Paging
- Emergency Operation
- Automatic Registration Service (ARS)
- Text Messaging Service (TMS)
- Secure Operations
- Managing Encryption
- Loading a Single Encryption Key
- Loading the Group Encryption Keys
- Using the Multikey Feature
- Selecting an Encryption Key (Conventional Only)
- Enabling Secure Transmission
- Accessing the Secure Feature
- Selecting a Keyset
- Erasing the Selected Encryption Keys
- Requesting an Over-the-Air Rekey
- MDC Over-the-Air Rekeying (OTAR) Page
- Hear Clear
- Managing Encryption
- The Global Positioning System (GPS)
- Understanding the GPS Feature
- Enhancing GPS Performance
- The Outdoor Location Feature (Using GPS)
- Accessing the Outdoor Location Feature
- Saving a Waypoint
- Viewing a Saved Waypoint
- Editing the Alias of a Waypoint
- Editing the Coordinates of a Waypoint
- Deleting a Single Saved Waypoint
- Deleting All Saved Waypoints
- Measuring the Distance and Bearing from a Saved Waypoint
- Using the Location Feature While in Emergency Mode
- Trunking System Controls
- Ignition Switch Options
- Utilities
- Viewing Recent Calls List
- Selecting the Power Level
- Selecting a Radio Profile
- Controlling the Display Backlight
- Turning Keypad Tones On or Off
- Turning Voice Mute On or Off
- Using the Time-Out Timer
- Using the Conventional Squelch Operation Features
- Using the PL Defeat Feature
- Using the Digital PTT ID Feature
- Using the Smart PTT Feature (Conventional Only)
- Accessing General Radio Information
- Using Optional External Alarms (Horn and Lights)
- Using the Voice Announcement
- Helpful Tips
- Accessories
- Appendix: Maritime Radio Use in the VHF Frequency Range
- Glossary
- Commercial Warranty and Service
General Radio Operation
English
36
Monitoring Features
Radio users who switch from analog to digital radios often
assume that the lack of static on a digital channel is an
indication that the radio is not working properly. This is not the
case.
Digital technology quiets the transmission by removing the
“noise” from the signal and allowing only the clear voice or data
information to be heard.
Monitor a channel to ensure the channel is clear before
transmitting.
Monitoring a Channel
Procedure:
Lift the control head off hook.
Conventional Modes Only:
1 Listen for activity on that channel.
2 Adjust the Volume Rocker if necessary.
3 If you hear no activity, press and hold the PTT button to start
your conversation.
OR
Trunked Modes Only:
1 Press the PTT button.
2 If you hear two, short, high-pitched tones, or if you hear no
tone and the red t indicator lights steadily, then proceed
with your message.
3 Release the PTT button to receive (listen).
If you are not in the range of the system, you may hear a
continuous low-pitched tone and the display shows
Out of
range
.
O3Head_6875946m01.book Page 36 Tuesday, November 1, 2011 12:00 PM