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General| Model | 51SL ES |
|---|---|
| Category | Portable Radio |
| Channels | 512 |
| Battery Type | Li-Ion |
| IP Rating | IP67 |
| Programming | PC Programmable |
| Frequency Range | 136-174 MHz |
| Power Output | 1-5 Watts |
| Weight | 12.3 oz with battery |
| Dimensions | 5.1 x 2.4 x 1.4 inches (130 x 61 x 36 mm) |
Overview of the basic functionalities and operating modes of the ES Series portable radios.
Details on features specific to conventional analog and digital (P25) operation modes.
Description of capabilities for SMARTNET and SmartZone trunked radio systems.
Explanation of features unique to Project 25 trunked operating mode.
Overview of features and capabilities specific to the Multi-Net trunked radio protocol.
Identification and function of controls located on the front panel of the radio.
Description of the power, antenna, and channel selection controls on the top panel.
Details on side panel buttons, PTT switch, and accessory connector.
Explanation of standard, enhanced, and graphical display modes and icons.
Information on audible tones and LED signals used for communication and status.
Instructions for turning the radio on/off and adjusting volume levels.
Procedure for setting and using a power-up password for unauthorized access prevention.
Guidance on navigating and selecting zones and channels using radio controls.
Information on battery removal/installation and connecting accessories.
Details on how to adjust or enable the display and button backlighting.
Explanation of temporary and permanent keypad lockout features.
Instructions for setting and adjusting squelch levels for optimal reception.
How to disable transmission on specific channels to monitor only.
Description of different operating modes: Conventional, SMARTNET/SmartZone, P25.
Accessing and displaying radio status details like band, version, and ESN.
Mapping functions to side, front, and top panel buttons for user customization.
Using function buttons to toggle specific radio features ON or OFF.
Navigating the radio's menu system to access and configure features.
Recalling and executing recently used functions via a dedicated button or menu.
Configuring the timer that limits continuous transmission duration.
Setting and returning to a preferred home channel for quick access.
Choosing between high and low power output levels for transmission.
Enabling or disabling various alert tones and adjusting their volume.
Disabling indicators and tones for discreet operation.
Introduction to priority and radio wide scanning modes.
Creating, editing, and selecting priority and radio wide scan lists.
Receiving and viewing GPS data from satellites via an attached receiver.
Updating radio parameters and firmware remotely over the air.
Ensuring channel availability before transmitting to avoid conversation disruption.
Unsquelching the receiver to monitor channels without a carrier detection.
Preventing transmission when the channel is already in use.
Using subaudible tones or digital codes to control squelch and filter unwanted calls.
Temporarily preventing transmissions after a time-out timer expires.
Limiting the total duration of a conversation per transmission.
Enabling direct radio-to-radio communication on the receive frequency.
Option to show channel frequency in MHz on the display.
Initiating emergency alarms and calls for priority system access.
Scanning features specific to conventional channels, including priority sampling.
Configuring Automatic Number Identification using various analog signaling types.
Copying radio programming information to another identical radio.
Details on Unit ID, Talkgroup ID, Network Access Code, and Out of Range indications.
Using the keypad for on-radio programming of channel and system parameters.
Sending and receiving text messages between radios or dispatch.
Transmitting GPS location data manually, automatically, or on system request.
Special modes for fire ground operations, including Commander and Responder roles.
Selecting analog or digital operation for SmartZone and P25 trunked systems.
Placing and receiving standard group calls to radios or dispatchers.
Placing and receiving calls to specific radio units (called Unit Calls in P25).
Placing and receiving calls over the public telephone system via the radio.
Sending and receiving pages with Call Alert feature on P25 trunked channels.
Sending pre-programmed messages to a dispatcher on P25 channels.
Manually or automatically transmitting current status to a dispatcher.
Handling emergency alarms and calls on SMARTNET/SmartZone and P25 trunked systems.
Automatic system fallback to conventional mode during network failures.
Priority Monitor Scan features for SMARTNET/SmartZone and P25 trunked systems.
Dispatcher-initiated talkgroup changes for efficient communication.
Signal strength indication, busy override, site trunking, and search functions.
Glossary of key terms used in Multi-Net operation, including Alias and Channel.
Description of Multi-Net channel programming, ID codes, and receive priority.
Displaying caller ID and talkgroup ID for incoming calls.
Automatic switching to new system/group for important messages.
Over-the-air programming of zones/channels for emergency or special situations.
Selecting and operating in emergency modes with automatic or manual transmit.
Note on encryption availability for Multi-Net channels.
Monitoring groups using scan lists, including ON/OFF indicators and list editing.
Disabling PTT queuing to prevent holding the switch during reception.
Programming channels for monitoring only, with transmission disabled.
Automatic site searching and registration for wide area coverage.
Explanation of various error messages that may appear on the radio display.
Understanding how factory programming affects feature availability.
Best practices for microphone usage to ensure clear voice transmission.
Tips for improving communication range and dealing with signal limitations.
Information regarding the necessity of a government license for radio operation.
Common issues like keypad lock, unprogrammed channels, and display problems.
Summary of available P25 features like data, conventional, and trunked operation.
Details on available encryption standards: DES, DES-OFB, and AES.
Information on Over-The-Air Rekeying capabilities for P25 channels.
Available trunking options: SMARTNET, SmartZone, and Multi-Net analog operations.
List of optional features like Keypad programming, MDC 1200, and OTAP.
Overview of different password types: User, Download/Upload, Master, and Zone.
Procedures for setting and managing radio passwords via computer connection.
Details on SecureNet, DES, DES-OFB, AES, and FIPS modes for secure communication.
Understanding encryption keys, IDs, and management modes like PID and SLN.
Configuring transmit and receive modes for clear or secure communication.
Process of sending encryption keys remotely using OTAR capabilities.
Supports data service on P25 Trunking systems using EFJohnson radios.
Connecting the radio to a computer via MDP Interface and RS232 cable.
Accessing data services by initiating context activation and data registration.
Creating a network connection for data transmissions between computer and radio.
Information on obtaining warranty statements and contacting the Warranty Department.
Registering products online for faster warranty service and notices.
Contacting technical support for assistance with radio issues.
Information for contacting EFJohnson Technologies Customer Service Department.
Guidelines for returning equipment for repair and required documentation.
How to order replacement parts directly from the Service Parts Department.
Accessing company information, products, and services via the website.
