RCA PRODIGI RDR2750 User manual

1
Copyright © 2021 RCA Communications Systems www.RCACommunicationsSystems.com
Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
CONTENTS:
Product Inspection..........2
RCA RDR2750 Overview..........2
Connecting the Base Station to Power Outlet..........3
Attaching / Removing the Antenna..........3
Turn On/O the Base Station..........3
Adjusting the Volume..........3
Programming Buttons..........3
Push-To-Talk..........3
Operational Status Indicators..........4
Display Icons..........4
LED Indicator..........4
Audio Tones..........4
Selecting a Zone..........4
Selecting a Channel, Subscriber ID or Group ID..........4
Receiving and Responding to a Group Call..........4
Receiving and responding to an Individual Call..........5
Receiving and All Call..........5
Making a Radio Call..........5
Making a Group Call..........5
Making a Private Call..........5
Making an All Call..........5
Making Group / Private Call with One Touch Access Button..........5
Emergency Operation..........5
Initiating & Responding to Emergency Alarm..........6
Exiting Emergency Mode..........6
Advanced Features..........6
Radio Check..........6
Sending a Radio Check..........6
Remote Monitor..........6
Initiating Remote Monitor..........6
Contacts Setting..........6
Making a Group Call from Contacts..........6
Making an Individual Call from Contacts..........7
Call Log Feature
Accessing the Call Log..........7
Storing an Alias or ID from the Missed Call List..........7
Deleting a Call from a Call List..........7
Call Alert Operation..........7
Receiving and Responding to a Call Alert..........7
Making a Call Alert from the Contact List..........7
Sending a Quick Text Message..........7
Managing Fail-to-Send Text Message..........8
Resend Text Message..........8
Forwarding a Text Message..........8
Editing a Text Message..........8
Managing Sent Text Message..........8
Viewing Sent Text Messages..........8
Deleting All Sent Text Messages from the Sent Items..........8
Receiving a Text Message..........8
Reading a Text Message..........9
Managing Received Text Message..........9
Viewing a Text Message from the Inbox..........9
Replying to a Text Message from the Inbox..........9
Deleting a Text Message from the Inbox..........9
Encryption..........9
Dual Tone Multi Frequency (DTMF)..........9
Radio Enable/Disable..........10
Radio Enable..........10
Scan
Viewing an Entry in the Scan List..........10
Scan Instructions and Methods..........10
Starting and Stopping Scan..........10
Responding to a Scan..........10
Deleting a Nuisance Channel..........11
Restoring a Nuisance Channel..........11
Utilities
Turning Keypad Tones On or O..........11
Setting the Squelch Level..........11
Setting the Power Level..........11
Controlling the Display Backlight..........11
Talkaround..........12
Turning the Radio Tones/Alert On or O..........12
Turning the LED On or O..........12
Turning the Introduction Screen On/O..........12
Accessing General Radio Information..........12
Checking the Radio ID..........12
Checking the Firmware Version..........12
Checking the CPS Version..........12
Care and Cleaning..........13
Troubleshooting..........13
CONTENTS: (continued)
Congratulations and Thank You for selecting the
PRODIGI RDR2750 Digital Radio Base Station
from RCA Communications Systems
- The most trusted name in radio!
Our newest digital professional communications product based on
DMR technology establishes a benchmark in premium digital two-
way radio equipment, made to perform flawlessly under the most
demanding commercial conditions. Cutting edge design, high-end
professional grade materials and components, simple operation
and superior assembly quality: RCA Communications Systems has
it all, including our exclusive no-nonsense, two-year “Warranty
Protection Program,” one of the most comprehensive warranties in the
communications industry.
To ensure you achieve maximum performance from your RDR2750
digital radio base station, please be sure to carefully read this manual.
MODELS COVERED IN THIS MANUAL:
• RDR2750V VHF Digital
Radio Base Station
• RDR2750U UHF Digital
Radio Base Station

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Copyright © 2021 RCA Communications Systems www.RCACommunicationsSystems.com
Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
PRODUCT INSPECTION
Prior to unpacking the RDR2750 digital base station radio, please
inspect the packaging for signs of damage and report any damage
or missing components immediately to your RCA Communications
System Sales and Service Center. Every RDR2750 digital base station
should come with the following items:
Item Qty.
RDR2750 - Base Station Radio 1
ANB2750U - Antenna for UHF Models
ANB2750V - Antenna for VHF Models 1
PS2750 - Power Supply 1
MB2750KIT - Mounting Bracket Screw Kit 1
MB2750KIT
Mounting Bracket Screw Kit
PS2750
Power Supply
MENU
P1
PT
PT
T
T
CH+ VOL+
CH- VOL-
P2
OK
BACK
RDR2750
Base Station Radio
ANB2750V/U
Antenna
RCA RDR2750 Base Station Overview
1LCD Display 7Push-To-Talk Button 13 External Microphone
Jack
2LED Indicators 8Internal Speaker 14 Power On / O Switch
3Menu Button 9P1 / P2 Buttons
(Programmable) 15 Power Supply
Connector
4Ok Button 10 Channel Up / Down
Buttons 16 Antenna Connector
5Back Button 11 Volume Up / Down
Buttons
6Internal Microphone 12 Programming Cable
Port
Note: The frequency band
of your RDR2750 is marked
on the radio label. If it is not
visible, identify the frequency
band according to the color
code ring on the antenna:
red indicates UHF 400-
430 Mhz, orange indicates
UHF 440-470 Mhz, purple
indicates VHF 136-174 Mhz.
MENU
P1
PT
PT
T
T
CH+ VOL+
CH- VOL-
P2
OK
BACK
3 4 5 6 7
9
8
10
11
1
2
12 13
14 15 16

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Copyright © 2021 RCA Communications Systems www.RCACommunicationsSystems.com
Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Connecting the Base Station to Power Outlet
1. Plug the adapter’s AC connector into the AC outlet socket. (see
image A)
2. Plug the adapter’s DC connector into the DC socket on the back of
the base station. (see image B)
Attaching / Removing the Antenna
1. With the base station turned o, set the antenna in the antenna
connector and turn clockwise to secure it.
2. To remove the antenna, turn the base station o and turn the antenna
counterclockwise.
Image A Image B
MENU
P1
PTPT TT
CH+ VOL+
CH- VOL-
P2
OK BACK
Turn On/O the Base Station
The base station can be turned On/O by using the power switch.
Note: There is no power up tone if the radio tones/alerts function
is disabled. If your base station does not power up, check your
connection to the power source. Make sure that power cord is properly
attached. If your base station still does not power up, contact your RCA
Communications Systems dealer.
Adjusting the Volume
To increase the volume, press the ( VOL+ ) button. To decrease the
volume, press the ( VOL- ) button.
Programmable Buttons
Your RCA Communications Systems Dealer can program the
programmable buttons as shortcuts to radio functions or preset
channels/groups depending on the duration of a button press:
Short Press - Press and release quickly.
Long Press - Press and hold for the programmed duration (between 1
seconds and 3.75 seconds).
All Alert Tones On/O - Toggles all tones and alerts on or o.
Emergency On - Initiates an emergency alarm or call.
Emergency O - Cancels an emergency alarm or call.
Nuisance Delete - Temporarily removes an unwanted channel, except
for the Selected Channel, from the scan list. The Selected Channel
refers to the user’s selected zone/channel combination from which
scan is initiated.
High/Low Transmit Power - Toggles transmit power level between high
and low.
Monitor On/O - Monitors a selected channel for activity.
One Touch Access - Directly initiates a predefined Private or Group Call,
a Call Alert or a Quick Text message.
Scan On/O - Toggles scan on or o. Tight/Normal Squelch -
Toggles squelch level between tight and normal squelch levels.
Privacy On/O - Toggles privacy (basic voice encryption) on or o.
Lone Worker On/O - Toggles Lone Worker feature On or O, on per
channel basis.
Push-To-Talk (PTT) Button
The PTT button on the side of the radio has two main functions:
-Press and hold down PTT button to initiate and call and talk.
Release the PTT button to listen. The microphone is activated
when the PTT button is pressed.
-If a call is in progress, the PTT button allows the radio to transmit to
the other radios that are part of the call.
Note: If the Talk Permit Tone is enabled, wait until the short alert tone
ends before talking.
During a call, if the Channel Free Indication feature is enabled on your
radio (programmed by your RCA Communications Systems Dealer),
you will hear a short alert tone the moment the target radio (the radio
that is receiving your call) releases the PTT button, indicating the
channel is free for you to respond. You will also hear the Channel Free
Indication tone if your call is interrupted, for example when the radio
receives an Emergency Call.
The Programmable Functions are:
All Alert Tones On/Off One Touch Access 4
Emergency On One Touch Access 5
Emergency Off One Touch Access 6
Nuisance Delete Repeater/Talkaround
High/Low Transmit Power Scan On/Off
Monitor On/Off Tight/Normal Squelch
One Touch Access 1 Encryption On/Off
One Touch Access 2 Lone Worker On/Off
One Touch Access 3

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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
You can access various radio functions through one of the following
ways: A short or long press of the relevant programmable buttons.
Or
1. To access the menu, press the
MENU
button. Press the appropriate
P1
or
P2
button to access the menu functions.
2. To select a function or enter a sub-menu, press the
OK
button.
3. To go back one menu level, or to return to the previous screen, press
the
BACK
button.
Note: Your radio automatically exits the menu after a period of inactivity
and returns to your Home screen.
Operational Status Indicators
Your radio indicates its operational status through the following:
• Display Icons
• Call Icons
• Sent Item Icons
• LED Indicator
• Audio Tones
Display Icons
The LCD display shows radio status, text entries, and menu entries.
The following are icons that appear on the radio’s display.
Received Signal Strength
Indicator (RSSI)
The number of bars displayed represents the radio
signal strength and is only displayed while the radio
is in receiving mode.
Monitor Selected channel is being monitored.
or Power Level Radio is set at Low power. Radio is set at High power.
Tones Disable Radio tones are turned o.
Scan Scan feature is enabled.
Priority Scan Radio detects activity on channel/group designated
as Priority 1 (if • is blinking) or Priority 2 (if • is steady)
Unread Message The Radio has unread message(s) in the inbox.
Inbox Full The radio’s Inbox is full.
Emergency Radio is in Emergency mode.
Encryption The Encryption feature is enabled.
Talkaround The radio is currently configured for direct radio to
radio communication.
Private Call Indicates a Private Call in progress. In the Contacts list,
it indicates a subscriber alias (name) or ID (number).
Group Call / All Call
Indicates a Group Call or All Call in progress. In the
Contacts list, it indicates a group alias (name) or ID
(number).
Sent Successfully The text message is sent successfully.
Send Failed The text message cannot be sent.
In-Progress The text message to a group alias or ID is pending
transmission.
LED Indicator
The LED Indicator shows the operational status of your radio.
Blinking Red - Radio is scanning, Radio is transmitting at low battery
condition, receiving an emergency transmission or has failed the self-
test upon powering up.
Solid Red - Radio is transmitting.
Blinking Green - Radio is powering up.
Solid Green - Radio is receiving or carrier is present/busy channel.
Rapidly Blinking Green - Radio is receiving a privacy-enabled call or
data.
Note: When the LED is solid green, it indicates the radio detects activity
over the air. Due to the nature of the digital protocol, this activity may or
may not aect the radio’s programmed channel.
Audio Tones
Alert tones provide you with audible indications of the radio’s status or
the radio’s response to data received.
Continuous Tone - A monotone sound. Sounds continuously until
termination.
Periodic Tone - Sounds periodically depending on the duration set by
the radio.
Repetitive Tone - A single tone that repeats itself until it is terminated
by the user.
Momentary Tone - Sounds only once for a short period of time defined
by the radio.
Selecting a Zone
Zones are groups of channels.
*RDR2750 oers up to 250 zones with a maximum of 16 channels per
zone.
1. Press the [
MENU
] key to access the menu.
2. Press [
P1
or
P2
] to scroll to the Zone Menu.
3. Press [
OK
] to select.
4. The display shows the current Zone.
5. Press [
P1
or
P2
] to desired Zone and press [
OK
] to select.
6. The selected Zone displays momentarily then returns to the selected
zone screen.
Making and Receiving Calls
Selecting a Channel, Subscriber ID or Group ID
Once the required zone is displayed (if you have multiple zones in your
radio), turn the programmed Channel Selector Buttons to select the
desired channel or by using the radio’s Menu navigate to the desired
subscriber alias or ID, or group alias or ID.
Receiving and Responding to a Group Call
To receive a call from a group of users, your radio must be
configured as part of that group. When you receive a Group Call:
1. The LED blinks green.
2. The first line of the display shows the caller alias, and the RSSI icon.
The second line displays the group alias and the Group Call icon.

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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
3. Press the [PTT] button to respond to the call and the LED indicator
lights up red.
Note: If Talk Permit Function is enabled, wait for the Talk Permit
Tone to finish and then speak clearly into the microphone.
4. Release the [PTT] button to listen again.
5. If there is no voice activity for a set period of time, the call ends.
Receiving and responding to an Individual Call
A Private Call is a call from an individual radio to another individual
radio. There are two types of Individual Calls. The first type is when a
radio presence check is performed prior to setting up the call, while
the other sets up the call immediately. When you receive a Private Call:
1. The LED blinks green.
2. The first line of the display shows the subscriber alias or ID, and the
RSSI icon. The second line displays Private Call and the Private Call
icon.
3. Press the [PTT] button to respond to the call and the LED indicator
lights up red.
4. If Talk Permit Function is enabled, wait for the Talk Permit Tone to
finish and then speak clearly into the microphone.
5. Release the [PTT] button to listen again.
6. If there is no voice activity for a set period of time, the call ends.
Receiving and All Call
An All Call is a call from an individual radio to every radio on the channel.
It is used to make important announcements requiring all radio user’s
full attention. When you receive an All Call:
1. The LED blinks green.
2. The first line of the display shows the subscriber alias or ID, and the
RSSI icon. The second line displays All Call and the All Call icon.
3. Once the All Call ends, the radio returns to the previous screen
before receiving the call
Note: The radio stops receiving the All Call if you switch to a dierent
channel while receiving the call.
Making a Radio Call
You can select a channel, subscriber ID, or group by using:
• The channel buttons
• The programmable buttons
• The contacts list
• Manual Dial (using contacts list)—This method is for Private Calls
only and is dialed using a keypad microphone (sold separately).
Note: Keypad microphone is required, sold Separately. Please contact
your RCA Communications Systems dealer for more info.
Making a Group Call
1. To make a call to a group of users, your radio must be configured
as part of that group. Use the Channel Selector buttons to select
the channel with the active group alias or ID.
2. Press the [PTT] button to make the call. When the target radio
responds, the LED lights up green. The first line displays
Group Call. The second line displays subscriber alias or ID.
Note: If Talk Permit Function is enabled, wait for the Talk Permit
Tone to finish, then speak clearly into the microphone.
3. Release the [PTT] button to listen.
4. If there is no voice activity for a predetermined period of time,
the call ends. The radio returns to the screen you were on prior to
initiating the call.
Making a Private Call
1. Use the Channel Selector buttons to select the channel with the
active subscriber alias or ID.
2. Press the [PTT] button to make the call. The LED lights up
solid red. The first line displays the subscriber alias or ID. The
second line displays Private Call and the Private Call icon.
Note: If Talk Permit Function is enabled, wait for the Talk Permit Tone
to finish and then speak clearly into the microphone.
3. Release the [PTT] button to listen. When the target radio responds,
the LED lights up solid green.
4. If there is no voice activity for a predetermined period of time,
the call ends. The radio returns to the screen last viewed prior to
initiating the call.
Making an All Call
This feature allows you to transmit to all users on a channel. Your radio
must be programmed to allow you to use this feature.
1. Use the Channel Selector buttons to select the channel with the
active All Call group alias or ID.
2. Press the [PTT] button to make the call. The LED lights up solid red
and the display shows the All Call group alias or ID, and the All Call
icon.
Note: Users on the channel cannot respond to an All Call.
Making a Group or Private Call with the One Touch Access Button
The One Touch Access feature allows you to make a Group or Private
Call to a predefined alias or ID easily. This feature can be assigned to a
short or long programmable button press. You can only have one alias
or ID assigned to a One Touch Access button. Your radio can have
multiple One Touch Access buttons programmed.
1. Press the programmed One Touch Access button to make a Group
or Private Call to the predefined alias or ID. The display shows the
group/subscriber alias or ID.
2. Press the [PTT] button to make the call. The display shows the
group/subscriber alias or ID, and the Group/Private Call icon.
Note: If Talk Permit Function is enabled, wait for the Talk Permit
Tone to finish, then speak clearly into the microphone.
3. Release the [PTT] button to listen. When the target radio responds,
the LED blinks green.
4. If there is no voice activity for a predetermined period of time, the
calls end. Radio returns to the screen you were on prior to initiating
the call.
Emergency Operation
An Emergency Alarm is used to indicate a critical situation. You can
initiate an Emergency at any time on any screen display regardless of
any activity on the current channel.
Note: This function is available only in digital mode.
Your radio supports 3 Emergency Alarms:
• Emergency Alarm
• Emergency Alarm with Call
• Emergency Alarm with Voice to Follow
Each alarm has the following default setting:
Disabled: Radio cannot transmit alarm signal, but can receive alarm
from other radios. Each alarm has the following types:
Regular: Radio transmits an alarm signal and shows audio and/or
visual indicators.

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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Silent: Radio transmits an alarm signal without any audio or visual
indicators. There will be no response (call) from the target radio until
you press the [PTT] button to initiate the call.
Silent with Voice: Radio transmits an alarm signal and is able to receive
an incoming call, without any audio or visual indicators, until you press
the [PTT] button to initiate, or respond to the call.
Initiating & Responding to Emergency Alarm
1. To initiate an Emergency Alarm press the programmed Emergency
button. The LED lights up solid red. The display shows Sending
Alarm, which alternates with your radio ID. Emergency icon
appears on the Home screen display. When an Emergency Alarm
acknowledgment is received, an alert tone sounds and the display
shows Emergency Alarm Successful. At this point depending on
the setting selected you can press the [PTT] to talk or your radio’s
microphone is automatically activated, allowing you to communicate
with the other radio without pressing the [PTT] button.
2. To Respond to an Emergency Alarm Press any button to stop all
Emergency Alarm received indications. Press [PTT] button to initiate
a call with the emergency initiating radio.
Exiting Emergency Mode
Your radio exits Emergency mode automatically when any of the
following occurs:
-Emergency Alarm acknowledgment is received (for Emergency
Alarm only), OR
-All retries to send the alarm have been exhausted, OR
-The Emergency O button is pressed, OR
-The [PTT] button is pressed
Note: If your radio is powered o, it exits the Emergency mode. The
radio will not re-initiate the Emergency mode automatically when it is
turned on again.
Advanced Features
Radio Check
If enabled, this feature allows you to determine if another radio is active
in a system without disturbing the user of that radio. No audible or visual
notification is shown on the target radio.
Note: This feature is only applicable for subscriber aliases or IDs in
digital mode.
Sending a Radio Check
Using the programmed Radio Check button.
1. Press [
BACK
] to access the menu.
2. Press [
P1
or
P2
] button to navigate to Contacts and press the
[
OK
] to select.
3. Press [
P1
or
P2
] button to the required subscriber alias or ID and
press [
OK
] to select. Or press [
P1
or
P2
] button to Manual Dial, then
press [
OK
] twice, input subscriber ID, then press [
OK
] button.
4. Press [
P1
or
P2
] button to Radio Check, then press [
OK
] button.
5. The display shows Radio Check: <Subscriber Alias or ID>, indicating
that Radio Check is in progress. The LED lights up red.
6. If the target radio is active in the system, a tone sounds and the
display briefly shows Target Radio Available OR if the target radio is
not active in the system, a tone sounds and the display briefly shows
Target Radio Not Available.
7. Press the [
BACK
] button is pressed while the radio is waiting for
acknowledgment, the radio terminates all retries and exits Radio
Check mode.
Remote Monitor
Allows the radio to send Remote Monitor command to another
radio. This command activates the receiving radio’s microphone
and transmitter for the duration specified for the receiving radio in
the Remote Monitor Hot Mic Time under the Decode Settings. The
receiving radio is controlled remotely without any indication given to
the receiving radio user.
Note: Your radio must be programmed by your RCA Communications
Systems dealer to allow you to use the Remote Monitor feature.
Initiating Remote Monitor
Use the programmed Remote Monitor button.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] button to navigate to Contacts and press the
[
OK
] to select.
3. Press [
P1
or
P2
] button to the required subscriber alias or ID and
press [
OK
] button to select Or press [
P1
or
P2
] button to Manual
Dial, then press [
OK
] twice. Input subscriber alias or ID and press
[
OK
] button.
4. Press [
P1
or
P2
] button to Remote Monitor and press [
OK
] button.
5. The screen will display remote monitor: <Subscriber alias or ID>,
indicating that Remote Monitor is in progress. The LED blinks red.
6. The display shows Remote Monitor Successful OR The display shows
Remote Monitor Failed.
7. If successful, the radio will start receiving audio from the monitored
radio for a programmed duration. Once the timer expires the LED
turns off.
Contacts Setting
Contacts provide an address book capabilities to your radio. Each
entry corresponds to an alias or ID that you use to initiate a call. The
entries are sorted in the order they are entered in the Contacts List.
Each entry is associated with a dierent call type: Group Call, Private
Call or All Call.
Note: You can add, delete, or edit contacts from the Digital Contacts
list.
Making a Group Call from Contacts
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] button to navigate to Contacts and press the [
OK
]
button to select. All entries are alphabetically sorted.
3. Press [
P1
or
P2
] button to the required group alias or ID.
4. Press [PTT] button to make the call. The LED lights up solid red. The
display shows Group Call icon, the group alias or ID, and the Group
Call icon.
5. Release the [PTT] button to listen, when any user in the group
responds, the LED blinks green. You see Group Call icon, the group
ID, and that user’s ID on your display.
6. If there is no voice activity for a programmed period of time, the call
ends.
Note: If Talk Permit function is enabled, wait for the Talk Permit Tone to
nish and then speak clearly into the microphone.

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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Making an Individual Call from Contacts
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] button to navigate to Contacts and press the [
OK
] button to select.
3. Press [
P1
or
P2
] button to navigate to desired subscriber alias
or ID or Manual Dial option and press [
OK
] twice. Use the keypad
microphone to input the subscriber ID. The second line displays
Private Call and the Private Call icon.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
4. Press the [PTT] to make the call. The first line displays the subscriber
alias or ID and the second line displays Private Call and the Private
Call icon.
5. Release the [PTT] to listen. When the target radio responds, the LED
blinks green and the display shows the transmitting user’s ID.
6. If there is no voice activity for the programmed period of time then
the call ends.
Note: If Talk Permit function is enabled, wait for the Talk Permit Tone to
finish and then speak clearly into the microphone.
Call Log Feature
Your radio keeps track of all recent outgoing, answered, and missed
Individual Calls. Use the call log feature to view and manage recent
calls. You can Store an ID from the Call Log to Contacts or Delete it.
The Call Log lists are Outgoing, Incoming, and Missed.
Note: When you select a Call List and it contains no entries, the display
shows List Empty.
Accessing the Call Log
Use the programmed Remote Monitor button.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] button to navigate to Call Log and press the
[
OK
] to select.
3. Press [
P1
or
P2
] button to navigate to the desired list and press
[
OK
] to select. The most recent entry is displayed first.
4. Use the [
P1
or
P2
] buttons to scroll through the list.
5. Press the [PTT] to initiate a call.
Storing an Alias or ID from the Missed Call List
1. While viewing an entry from the Call Log list press [
OK
] to select.
2. Press [
P1
or
P2
] button to navigate to [Store].
3. Press [
OK
].
4. Use the keypad to input a name.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
5. Press [
OK
] to confirm.
6. The display shows Contact Saved.
Deleting a Call from a Call List
1. While viewing an entry from the Call Log list press [
OK
] to select.
2. Press [
P1
or
P2
] button to navigate to [Delete].
3. Press [
OK
].
4. Press [
OK
] again to confirm.
Receiving and responding to a Call Alert
When you receive a Call Alert page, on the display you see Call Alert that
alternates with the alias or ID of the calling radio.
1. LED blinks red.
2. Press and release [PTT] button to conrm the prompt, or press [
OK
]
button to select ”Ignore?” and to exit the Call Alert.
Call Alert Operation
Call Alert paging enables you to alert a specific radio user to call you
back when they are able to do so.
This feature is applicable for subscriber aliases or IDs only and is
accessible through the menu via Contacts or manual dial.
Making a Call Alert from the Contact List
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Contacts and press [
OK
] to select.
3. Press [
P1
or
P2
] to the desired subscriber alias or ID and press
[
OK
] to select or Press [
P1
or
P2
] to the Manual
Dial option and press [
OK
] twice. Use the keypad
microphone to input the subscriber ID.
4. Press [
P1
or
P2
] to Call Alert and press [
OK
].
5. The display shows Call Alert: <Subscriber Alias or ID>,
indicating that the Call Alert has been sent.
6. The LED lights up red when your radio is sending the
Call Alert. If the Call Alert acknowledgment is received, a
tone sounds and the display shows Call Alert successful.
OR if the Call Alert acknowledgment is not received, a
tone sounds and the display shows Call Alert Failed.
Sending a Quick Text Message
Your radio supports a maximum of 50 Quick Text messages as
programmed by your RCA Communications Systems dealer. While
Quick Text messages are predefined, you can edit each message
before sending it.
1. Press [
MENU
] to access the menu.
2. Press[
P1
or
P2
] to navigate to Messages.
3. Press [
P1
or
P2
] to Quick Text and press [
OK
] to select.
4. Press [
P1
or
P2
] to the desired Quick Text and press [
OK
] to select.
A blinking cursor appears. Use the keypad microphone to
edit the message, if needed. Press [
P1
] to move one space
to the left. Press [
P2
] key to move one space to the right.
Press [* DEL] key to delete any unwanted characters.
5. Press [
P1
or
P2
] button to send or store
once message is completed.
6. Select Send and press [
P1
or
P2
] to the required alias or ID and
press [
OK
] to send the message, or press [
P1
or
P2
] to Manual
Dial, press [
OK
] button, input subscriber ID and press [
OK
] button.
7. The display shows Text Message: <Subscriber/Group
Alias or ID>, confirming your message is being sent.
Note: Keypad microphone is required, sold separately. Please
contact your RCA Communications Systems dealer for more info.
5. The display shows Entry Deleted.
6. Press [
OK
] again to return to main menu.

8
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INSTRUCTION MANUAL
RDR2750 Digital Base
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8. If the message is sent successfully, a tone sounds and the display
shows Message Sent. OR if the message cannot be sent, a high
tone sounds and the display show Message Send Failed. If the text
message fails to send, the radio returns you to the Resend option
screen.
Note: If programmed by your RCA Communications Systems dealer you
can also press One Touch Access button to send a predefined Quick
Text message to a predefined alias or ID.
Resend Text Message
1. Press [
OK
] to resend the same message to the same subscriber /
group alias or ID.
2. If the message is sent successfully, a tone sounds and the display
shows Message Sent. OR if the message cannot be sent, the display
shows Message Send Failed.
Managing Fail-to-Send Text Messages
You can select one of the following options while you are on the Resend
option screen:
• Resend
• Forward
• Edit
Forwarding a Text Message
Select Forward to send the message to another subscriber/group alias
or ID.
1. Press [
P1
or
P2
] button to navigate to Forward and press the
[
OK
] to select.
2. Press [
P1
or
P2
] to navigate to the required alias or ID and press
[
OK
] to send. OR press [
P1
or
P2
] to navigate to Manual Dial and
press [
OK
], input subscriber ID then press [
OK
] button.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
3. The display shows Text Message: <Subscriber/Group Alias or ID>
confirming your message is being sent.
4. If the message is sent successfully, a tone sounds and the display
shows Message Sent. If the message is not sent, a high tone sounds
and the display shows Message Send Failed.
Editing a Text Message
Select Edit to edit the message before sending it.
1. Press [
P1
or
P2
] button to navigate to Edit and press [
OK
] to select.
2. A blinking cursor appears beside the message. Use the keypad
microphone to edit your message. Press [
P1
] to move one
space to the left. Press [
P2
] key to move one space to the
right. Press [* DEL] key to delete any unwanted characters.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
3. Press [
OK
] button to send or store once message is completed.
4. Select Send and press [
P1
or
P2
] to navigate to the
desired alias or ID and press [
OK
] to send the message,
or press [
P1
or
P2
] to navigate to Manual Dial, press [
OK
] button, input subscriber ID and press [
OK
] button.
Managing Sent Text Message
Once a message is sent to another radio, it is saved in Sent Items. The
most recent sent text message is always added to the top of the Sent
Items list.
The Sent Items folder is capable of storing a maximum of fifty (50)
last sent message. When the folder is full, the next sent text message
automatically replaces the oldest text message in the folder.
Note: Press [
BACK
] at any time to return to the previous screen.
Viewing Sent Text Messages
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Messages and press [
OK
] to select
3. Press [
P1
or
P2
] to navigate to Sent Items and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to the desired message and press
[
OK
] button.
You can select one of the following options while viewing a sent text
message:
• Resend
• Forward
• Edit
• Delete
To perform any of the function press [
OK
] again while viewing the
message.
To perform any of the functions:
1. Press [
OK
] again while viewing message.
2. Press [
P1
or
P2
] to navigate to Resend, Forward, Edit or Delete and
press [
OK
] to select.
3. If you select [Resend] or [Edit] and then [Send] the display will show
Text Message: <Subscriber/Group alias or ID>, confirming that the
same message is being sent to the same target radio.
4. If the message is sent, a tone sounds and the display shows Message
Sent. If the message is not sent, a high tone sounds and the display
shows Message Send Failed. The radio returns to the Resend option
screen. Press [
OK
] to resend the message to the same subscriber/
group alias or ID.
Deleting All Sent Text Messages from the Sent Items
1. Press [
MENU
] button to menu mode.
2. Press [
P1
or
P2
] to navigate to Messages and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Sent Items and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate Delete All and press [
OK
] to select.
5. The display shows Delete Message?, press [
OK
] to confirm. The
display shows Sent Items Cleared.
5. The display shows Text Message: <Subscriber/Group Alias or ID>,
confirming your message is being sent.
6. If the message is sent successfully, a tone sounds and the display
shows Message Sent. If the message cannot be sent, a high tone
sounds and the display shows Message Send Failed.
Receiving a Text Message
When your radio receives a message, the display shows the alias or ID
of the sender and the Message icon at the far left of the screen.
You can select one of the following options when receiving a text
message:
• Read?
• Read Later
• Delete

9
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INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Reading a Text Message
1. Press [
P1
or
P2
] to navigate to [Read] and press [
OK
] to select.
2. Selected message in the Inbox opens, press [
OK
] to return to Home
Screen or press [
P1
or
P2
] enter into Read Later or Delete option
screen.
• Select Read Later to return to the screen you were on prior to
receiving the text message.
• Select Delete to delete the text message
Managing Received Text Message
Use the Inbox to manage your text messages. The Inbox is capable of
storing a maximum of 10 messages. Your radio supports the following
options for text messages:
• View
• Reply
• Forward
• Delete
• Delete All
Text messages in the Inbox are sorted according the date they were
received.
Press the [
BACK
] button at any time to return to the previous menu.
Replying to a Text Message from the Inbox
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Messages and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Inbox and press [
OK
] to select.
4. Press [
OK
] to select current message, and press [
OK
] to select.
Press [
OK
] again to access the sub-menu and select Reply, Forward
or Delete the message.
5. Press [
P1
or
P2
] to navigate to Reply and press [
OK
] to select.
6. Press [
P1
or
P2
] to navigate to Write and press [
OK
] to select. A
blinking cursor appears. Use the keypad to write your message OR
press [
P1
or
P2
] to navigate to Quick Text and press [
OK
]. After
selecting the desired message press [
OK
] button. A blinking cursor
appears. Use the keypad to edit your message, if required.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
7. Press [
OK
] to send and [
OK
] again to confirm.
8. The display shows Text Message: <Subscriber/Group Alias or ID>,
confirming your message is being sent.
9. If the message is sent successfully, a tone sounds and the display
shows Message Sent. If the message cannot be sent, the display
shows Message Send Failed. If the message fails to send, the radio
returns to the Resend option screen.
Viewing a Text Message from the Inbox
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Messages and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Inbox and press [
OK
] to select.
4. Press [
OK
] to view the current message. Unread messages are
indicated with an exclamation mark. (!)
Deleting a Text Message from the Inbox
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Messages and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Inbox and press [
OK
] to select.
4. Press [
OK
] to select current message, and press [
OK
] to select. Press
[
OK
] again to access the sub-menu to Reply, Forward or Delete the
message.
5. Press [
P1
or
P2
] to navigate to Delete and press [
OK
] to select.
6. At Delete Message?, press [
P1
or
P2
] to navigate to Yes and press
[
OK
]. The display shows Message Deleted.
Note: When you select the Inbox and it contains no text messages, the
display shows List Empty.
Encryption
If enabled, this feature helps to prevent eavesdropping by unauthorized
users on a channel by the use of a software based scrambling solution.
Your radio must have encryption enabled on the channel to send an
encryption-enabled transmission. To unscramble a encryption-enabled
call or data transmission, your radio must be programmed by your
RCA Communications Systems dealer to have the same Encryption
Key Value and Encryption Key ID as the transmitting radio. If your radio
receives a scrambled call that is of a dierent Encryption Key Value and
Encryption Key ID, you will hear a garbled voice transmission.
The LED lights up solid green while the radio is transmitting and blinks
green rapidly when the radio is receiving an ongoing encryption-
enabled transmission.
You can pre-program 16 groups encryption keys by software. To turn On/
O the encryption, press the programmed Encryption On/O button to
toggle between On and O. You can also turn on and o the Encryption
through the Menu of the radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Settings and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to Encryption and press [
OK
] to select.
5. The display shows Encryption and Turn On. Press [
OK
] to enable
encryption. The display shows Encryption On. If the Encryption was
already on the display shows Encryption and Turn O. Press [
OK
] to
disable encryption. The display shows Encryption O.
If the radio has encryption assigned to a channel, the Home screen of
the radio shows the Encryption On Icon (locked lock) or Encryption O
icon (unlocked lock).
Note: This feature is available only in digital mode.
Dual Tone Multi Frequency (DTMF)
The Dual Tone Multi Frequency (DTMF) feature allows the radio to
operate in a radio system with an interface to telephone or other DTMF
based systems. DTMF Codes can be programmed into the radio by
your RCA Communications Systems dealer. DTMF receive/transmit
feature has four optional modes with 32 encode groups with up to 30
characters per group.
To use this feature, your radio must have an access code, which is
system dependent. Please contact with your RCA Communications
Systems dealer or system administrator for more information.

10
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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Radio Disable / Enable
The Radio Enable/Disable feature allows you to enable or disable any
radio within your system. For example, you may want to disable a stolen
radio, to prevent the thief from using it, then enable that radio once it
is recovered.
Note: The Radio Disable/Enable feature requires the radio in your system
to have this function enabled. You can only Enable/Disable a radio that
is within communication range. Check with your RCA Communications
Systems Dealer or system administrator for more information.
Radio Disable
Radio Enable can be initiated through the Menu of your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Contacts and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to the desired subscriber alias or ID
and press [
OK
] to select. You can also press [
P1
or
P2
] to navigate
to Manual Dial and press [
OK
] twice, input subscriber ID and press
[
OK
] to select.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
4. Press [
P1
or
P2
] to navigate to Radio Disable and press [
OK
] to
select.
5. If successful, a tone sounds and the display shows Radio Disable
Successful!. If failed, a tone sounds and the display shows Radio
Disable Failed.
Note: Do not press the [
BACK
] button to return to the previous Menu until
the operation is complete.
Radio Enable
Radio Enable can be initiated through the Menu of your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Contacts and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to the desired subscriber alias or ID
and press [
OK
] to select. You can also press [
P1
or
P2
] to navigate
to Manual Dial and press [
OK
] twice, input subscriber ID and press
[
OK
] to select.
Note: Keypad microphone is required, sold separately. Please contact
your RCA Communications Systems dealer for more info.
4. Press [
P1
or
P2
] to navigate to Radio Active and press [
OK
] to select.
5. If successful, a tone sounds and the display shows Radio Active
Successful!. If failed, a tone sounds and the display shows Radio
Active Failed.
Note: Do not press the [
BACK
] button to return to the previous Menu until
the operation is complete.
Scan
Scan lists are created and assigned to individual channels / groups.
The radio scans for voice activity by cycling through the channel/group
sequence specified in the scan list for the current channel / group. Your
radio can support up to 250 scan lists, with a maximum of 16 members
in a list. Each scan list supports a mixture of both analog and digital
entries. You can add, delete, or prioritize channels by editing the scan
lists.
Viewing an Entry in the Scan List
1. Use the Channel Selector Knob to select a channel programmed
with a scan list.
2. Press [
MENU
] to access the menu.
3. Press [
P1
or
P2
] to navigate to Scan and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to View List and press [
OK
] to select.
5. Use [
P1
or
P2
] to view the members on the scan list.
Note: If set as priority, the Priority icon appears left of the member’s
alias, indicate whether the member is on a Priority 1 or Priority 2 channel
list. You cannot have multiple Priority 1 or Priority 2 channels in a scan
list. There is no Priority icon if priority is set to None.
Starting and Stopping Scan
Press the programmed Scan side button to start or stop the Scan
feature or follow the procedure below:
1. Use the Channel Selector Knob to select a channel programmed
with a scan list.
2. Press [
MENU
] to access the menu.
3. Press [
P1
or
P2
] to navigate to Scan and press [
OK
] to select.
4. The display shows Turn O if scan is disabled or the display shows
Turn on if scan is enabled.
5. Press [
OK
] to select.
6. The LED blinks red and the Scan icon is displayed when Scan is
enabled. The LED turns o and the Scan icon disappears when Scan
is disabled.
Scan Instructions and Methods
When a scan is initiated, your radio cycles through the programmed
scan list for the current channel looking for voice activity. The LED
blinks red and you see the Scan icon on the display.
There are two ways of initiating scan:
• Manual Scan: Initiate scan manually using the programmed by your
RCA Communications Systems dealer Scan ON/OFF side button or
menu function. When scan is initiated, radio will detect all channels /
groups on the programmed scan list.
• Auto Scan: Your radio automatically starts scanning when you select
a channel / group that has Auto Scan enabled.
Responding to a Scan
During scanning, your radio stops on any channel / group where activity
is detected. After the transmission is over the radio remains on the
active channel for a programmed time period known as “hang time”.
1. Press the PTT button during hang time to respond to the call. The
LED lights up red.
2. Release PTT button to listen.
Note: If you do not respond within the hang time period, the radio
continues scanning other channels / groups.

11
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INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Deleting a Nuisance Channel
If a channel continually generates unwanted calls or noise (termed
a “nuisance” channel), you can temporarily remove the unwanted
channel from the scan list.
Note: This capability does not apply to the channel designated as the
Selected Channel. This feature is not accessible through the menu.
1. When your radio stops on an unwanted or nuisance channel, press
the programmed Nuisance Channel Delete button until you hear a
tone.
2. Release the Nuisance Channel Delete button. The nuisance channel
is deleted.
Restoring a Nuisance Channel
To restore the deleted nuisance channel, power the radio o and back
on again or press Stop and Start to restart a scan via the programmed
Scan button.
Utilities
Turning Keypad Tones On or O
You can enable and disable keypad tones if needed.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Tone/Alerts and press [
OK
] to select.
5. Press [
P1
or
P2
] to navigate to Keypad Tones and press [
OK
] to
select.
6. If the display shows Turn On, Press [
OK
] to enable the keypad tones.
If the display shows Turn O press [
OK
] to disable the keypad tones.
Setting the Squelch Level
You can adjust your radio’s squelch level to filter out unwanted calls
with low signal strength or channels that have a higher than normal
background noise.
Settings: Normal is the default level. Tight may help to filter out
(unwanted) calls and / or background noise. However, calls from radio
within your system that are in very remote locations may also be filtered
out.
Press the programmed Squelch button to toggle squelch level between
normal and tight or follow the procedure below to adjust the Squelch
Level through the Menu.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Squelch and press [
OK
] to select.
5. Choose either Tight or Normal and press [
OK
] button, screen returns
to the previous menu.
Setting the Power Level
You can customize your radio’s power setting to high or low for each
channel.
Settings: High enables communication with radios located at a
considerable distance from you. Low enables communication with
radios in closer proximity.
Press the programmed Power Level button to toggle transmits power
level between high and low or follow the procedure below to adjust the
Power Level through the Menu.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Power and press [
OK
] button.
5. Change your current setting as prompted on the display and press
[
OK
] to select new power level.
Press the [
BACK
] button to return to the Home screen. The display shows
the Power Level icon.
Controlling the Display Backlight
You can change the radio’s display backlight setting according to
your needs. The setting also aects the Menu navigation buttons and
keypad backlighting accordingly.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Backlight and press [
OK
] button.
5. You have following options to choose from:
• Always
• 5S
• 10S
• 15S
• Turn O
Select the desired setting and press the [
OK
] button.
Note: The display backlight and keypad backlight are automatically
turned o if the LED indicator is disabled.

12
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Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
Turning the Radio Tones/Alert On or O
You can enable and disable all radio tones and alerts (except for the
incoming Emergency alert tone) if needed.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to All Tones/Alerts and press [
OK
] to
select.
5. Press [
P1
or
P2
] to navigate to All Tones and press [
OK
] to select.
6. If the display shows Turn On press [
OK
] to enable all tones and alerts
and the display shows All Tones On. If the display shows Turn O
press [
OK
] to disable all tones and alerts and the display shows All
Tones O.
Talkaround
This feature toggles between repeater and talkaround (direct) mode.
If you are using a repeater and your repeater is not operating or you
are out of it’s range, you can continue to communicate during that time
directly with other radios within your group. This is called “talkaround”.
Press the programmed Repeater / Talkaround button to toggle between
talkaround and repeater modes or follow the instructions below to use
Menu of your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Talkaround and press [
OK
] to select.
5. If the radio is currently in Repeater Mode display shows “Turn On”. If
the radio is in Talkaround Mode the display shows Turn O.
6. Press [
OK
] to select. The display shows Talkaround On or Talkaround
O.
7. The screen automatically returns to the previous menu.
8. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
Accessing General Radio Information
Your radio contains information on the following:
• Radio ID
• CPS Version
• Firmware Version
• Hardware Version
Note: Press [
BACK
] at any time to return to the previous screen.
Checking the Radio ID
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Info and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to My Number and press [
OK
] button.
5. The display shows radio ID and alias.
Turning the Introduction Screen On or O
You can enable and disable the Introduction Screen if needed.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to Intro Screen and press [
OK
] to select.
5. If The display shows Turn On press [
OK
]
to enable the Introduction Screen and the display shows Intro
Screen On. If the display shows Turn O press [
OK
] to disable the
Introduction Screen and the display shows Intro Screen O.
Turning the LED Indicator On or O
You can enable and disable the LED Indicator if needed.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Settings and press [
OK
] to
select.
4. Press [
P1
or
P2
] to navigate to LED Indicator and press [
OK
] button.
5. If the display shows Turn On. Press [
OK
] to enable the LED Indicator
and the display shows All LEDs On. If the display shows Turn O
press [
OK
] to disable the LED Indicator and the display shows All
LEDs O.
Note: The display backlight, buttons and keypad backlight are
automatically turned o if the LED indicator is disabled.
Checking the Firmware Version
Display the firmware version on your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Info and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to Firmware Ver. and press [
OK
] button.
5. The display shows the current Firmware version.
Checking the CPS Version
Display the CPS version on your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Info and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to CPS Ver. and press [
OK
] button.
5. The display shows the current CPS version.

13
Copyright © 2021 RCA Communications Systems www.RCACommunicationsSystems.com
Communications Systems
INSTRUCTION MANUAL
RDR2750 Digital Base
Station Radio
RCA and the RCA logo are trademarks of Technicolor SA and are used under license. All other trademarks are the property of their respective owners. © 2021 RCA Communications Systems. All rights reserved.
www.rcacommunicationssystems.com
[email protected]
[phone]
Created in U.S.A.
CARE AND CLEANING
• Do not directly handle the radio by its antenna or external
microphone.
• Do not place the radio in a dusty or dirty environment.
• Clean the radio with a lint-free cloth moistened with clean water
and/or a mild dishwashing liquid to remove dirt, grease and dust.
• Avoid subjecting the radio to corrosives, solvent or spirits.
Checking the Hardware Version
Display the Hardware version on your radio.
1. Press [
MENU
] to access the menu.
2. Press [
P1
or
P2
] to navigate to Utilities and press [
OK
] to select.
3. Press [
P1
or
P2
] to navigate to Radio Info and press [
OK
] to select.
4. Press [
P1
or
P2
] to navigate to Hardware Ver. and press [
OK
] button.
5. The display shows the current Hardware version.
Symptom Solution
Radio will not power on a. The battery needs charging. Recharge the battery or replace it with a fresh one.
b. The battery is not properly installed. Remove the battery and reattach it.
The operating time is noticeably shorter
than normal even though the battery is
properly charged.
a. The battery has worn out; it is time to buy a new battery.
b. The battery is not fully charged. Make sure that the battery is removed after LED
indicator has turned green.
Cannot talk to or hear transmissions from
your group members
a. Make sure that your radio operates on the same channel and / or has the same
CTCSS/CDCSS settings as your group members.
b. Make sure you are within their communication range.
Radio is on, but you cannot hear voice trans-
missions or they are not very loud
a. Turn the volume control knob to its maximum volume.
b. Return the radio to your dealer to check for microphone damage.
TROUBLESHOOTING