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The application we offer it for is to use with our MURS Wireless PA system in applications that need zone paging. The MURS SLX has the ability to have a programmed contact list that enables you to select an individual Wireless PA system to broadcast your message to, or you can broadcast to all units. To choose a unit you simply press a preprogrammed hotkey to select the contact list, and then use the up/down arrow keys to select the zone you want to page to.

This radio can only be programmed from an optional PC software and cable. The software saves programming files as Radio Definition Files (.rdf) to your computer hard drive and these files can be read to review programming of radios currently in service or for programming other radios to the same set-up. We can also do the programming and complete system setup for you, but there will be a programming charge that varies based on the amount of programming required.

Here are some of the more notable features this radio has:

Selcall Capability
Selcall (selective calling) is a type of squelch protocol used in radio communications systems in which transmissions include a brief burst of sequential audio tones. Receivers that are set to respond to the transmitted tone sequence will open their squelch, while others will remain muted. This feature is used in the Wireless PA application above as well as other features. In a typical Selcall application the radio will be programmed with a unique ID code that identifies that specific radio. When the radio is called the ID code is decoded and the Alias for that code is displayed. A second ID code could be used when operating the radio in another Selcall system. Decoder codes can also be entered for advanced features such as RX reset, incoming emergency, acknowledge, or 2-tone.

Hotkeys
Every key on the radio except the PTT button can be programmed to any one of the following functions. Menu, Up and Down buttons should remain as assigned in all but the most basic radio configuration to effectively utilize the many features.

Priority Channel
A priority channel can be assigned on any radio that has been programmed for Scan operation. With Priority Scan enabled the designated priority channel will be checked more frequently for signal, and will also be checked while the radio is receiving on another channel. This assures the radio user that calls on the primary operating channel will not be missed when scanning a large number of channels or when scanning busy channels.

Status Call
Status Call creates fixed messages that can be selected from the Status List for transmission, or can be sent automatically. For example, if a user will be unavailable for a period of time they can select a “BUSY” status from the Status List. If incoming calls are not answered the radio will automatically transmit the “BUSY” status message to let the caller know the user is unavailable. A “BUSY” status message is programmed in every radio by default.

Scan
The radio can scan all channels in the radio that have been marked for scan. Press the Scan hotkey to begin scanning. When the radio detects a signal on one of the scanned channels it will stop, remain on the channel as long as a signal is present, then waits briefly after the signal is gone before it resumes scanning. Pressing the PTT button will cause the radio to leave scan operation and transmit on the home channel*. Optionally, the radio can be set to transmit on the last channel on which a signal was received when the PTT button is pressed during scan. Any time the PTT button is pressed the radio leaves scan operation and the Scan hotkey must be pressed to resume scanning. With Voting Scan enabled the radio will only stop on channels where the received signal exceeds the programmed Voting Level. With Best Voting Scan enabled the radio will scan all marked channels, determine the channel with the best signal and receive on that channel.

* Home channel is the channel the radio was operating on when the Scan hotkey was pressed.

Priority Scan
A priority channel can be assigned on any radio that has been programmed for Scan operation. With Priority Scan enabled the designated priority channel will be checked more frequently for signal, and will also be checked while the radio is receiving on another channel. This assures the radio user that calls on the primary operating channel will not be missed when scanning a large number of channels or when scanning busy channels.

Busy Channel Lockout
Busy Channel Lockout prevents transmitter operation on a channel when there is a received signal present. The radio can be programmed to prevent transmit any time a received signal is present, prevent transmit unless the received signal carries the correct subtone, or prevent transmitting only when the received signal carries the correct subtone. The Busy Channel Lockout setting will apply to all channels programmed into the radio.

DTMF ANI
A DTMF ANI string can be sent on the leading or trailing edge of every transmission to identify the radio. The DTMF ANI string can be up to 7-characters long, and can consist of any combination of the numeric characters 0-9, alpha characters A-E, or the # character. DTMF ANI programming is applied to all channels, but the radio can be programmed with a unique code on a channel-by-channel basis using the Selcall feature.

VOX
With the VOX (Voice Operated Transmitter) feature enabled a radio can transmit automatically whenever voice audio is present at the microphone. The voice audio level required to key the transmitter can be programmed to a set level, or the radio can determine the necessary level automatically based on the ambient noise.

Power Save
Power Save can be used to conserve battery power when the radio is in a standby condition. The radio will enter into a low power sleep condition if it does not transmit or receive for a period of time, waking up periodically to check for a received signal, and then revert to the sleep condition. This cycle of sleeping and waking will continue until the PTT button is pressed or a signal is received.

Hotkeys
Every key on the radio except the PTT button can be programmed to any one of the following functions. Menu, Up and Down buttons should remain as assigned in all but the most basic radio configuration to effectively utilize the many features.

• No Function Assigned - The key will have no function.

• Menu Button - Will activate the radio menu feature, menu selections will appear on the display.

• Up Button – Will scroll up any selection list. This includes channel list, menu list, contact list, status list, RX or TX tone list, and variable level settings.

• Down Button – Will scroll down any selection list.

• Monitor/Call Cancel – Will toggle sequentially between tone, carrier, and open squelch mode, or will clear the display of any incoming call.

• Emergency Button – Will transmit the Emergency code.

• Backlight Button – Will alternately turn the display light on and off.

• Squelch Level – Will display the current squelch level and allow the user to raise or lower squelch with the Up and Down buttons. Smaller numbers increase squelch sensitivity, allowing the radio to hear weak and distant signals. Larger numbers decreases squelch sensitivity so that only strong, quiet signals are heard.

• VOX On/Off Button – Will alternately turn VOX (voice operated transmitter) on and off.

• Keypad Lock Button – Prevents the user from changing channels.

• Alerts On/Off – Allows the user to turn alert tones off for silent operation.

• DTMF On/Off - Alternately enables and disables DTMF encoding.

• Scan – Alternately activates and de-activates channel scanning.

• Talkaround – Causes the radio to transmit on the receive frequency on channels where the RX and TX are not the same.

• Password – Enables and disables password protection of the radio.

• Call 1, 2, 3, or 4 – Transmits a selective signaling code that’s been pre-programmed on a per channel basis.

• X Tone Select – Allows programming of CTCSS or DCS encode on the current operating channel.

• TX Power Level – Alternately sets transmitter power to high or low on the current operating channel.

• Priority Scan – Sets the radio to Priority Scan operation.

• Power Save – Alternately enables and disables Power Save.

• RX Tone Select – Allows programming of CTCSS or DCS decode on the current operating channel.

• Group Select– Select a pre-programmed group of channels.

• Missed Calls – Displays a list of missed Selcall calls.

• Contact List – Select and send from a list of pre-programmed encode codes.

• Status List – Select and send from a list of pre-programmed encode status codes.

• Scrambler Button – Alternately enables and disables scrambling on the current operating channel.

• Call Tones Button – Continuously transmits two pre-programmed, alternating tones for a call alert as long as the Call Tones hotkey is held down.

• Variable Call – Allows the user to set and send a Selcall encode code.

• Fix Channel 1, 2, 3, or 4 – Sets the radio to a pre-programmed channel.

Groups
Channels can be sub-divided into groups on radios with a large number of channels programmed. The groups are set according to the programmed channel sequence, so the sorting of the radio channels is critical with Group Select. With Group enabled the radio must be programmed with a Group Select hotkey assigned to the Group Select function, or the radio Menu must have Group Change enabled.

Example: On a 25-channel radio Group 1 is set to 10, Group 2 is set to 10, and Group 3 is set to 5 Group 1 = channels 1-10, Group 2 = channels 11-20, Group 3 = channels 21-25

Password
Password protection prevents unauthorized users from operating the radio. When the radio is turned on a 4- character password must be entered using the Up, Down and Menu hotkeys before the radio can be used.

Emergency
The Emergency feature allows the radio to transmit an Emergency code on a pre-defined channel to immediately communicate with all radios that have the same Emergency programming.

Lone Worker
Lone Worker is useful in situations where the radio user works alone and is required to check in at regular intervals. The radio will beep to remind the Lone Worker that they must call in. If they do not call in within the allowable period of time the radio will automatically send the Emergency code.

Fix Channel
Fix Channel assigns a specific radio channel to any of the 4 Fix Channel hotkeys. When the Fix Channel hotkey is pressed the radio will operate on the assigned channel.

Call Tones
Call Tones allows the radio user to transmit two alternating tones continuously as long as the Call Tones hotkey is held down. Practical applications would be as a Call Tone, Emergency Alert, or as an Event Alert.

Start ANI
Start ANI is used for radio turn-on identification. The radio can be programmed to automatically send a 2-Tone, DTMF or Selcall code of up to 7-digits every time the radio is turned on, or alternatively, the 1st time the PTT is pressed after the radio is turned on.