KENWOOD NXR-900 Digital Base Repetidor Instruction Manual
- June 16, 2024
- KENWOOD
Table of Contents
KENWOOD NXR-900 Digital Base Repetidor
Product Information
Specifications
- Model: NXR-900/ NXR-901
- Frequency: 800MHz (NXR-900), 900MHz (NXR-901)
- Type: Digital Base-Repeater
- Power Source: 13.8 V DC
Product Usage Instructions
Precautions
Please read and follow these precautions before using the repeater:
- Government law prohibits the operation of unlicensed radio transmitters within the territories under government control.
- Illegal operation is punishable by fine and/or imprisonment. Refer service to qualified technicians only.
- This repeater is intended for use as a fixed base station with the antenna located outdoors on the rooftop or on an antenna tower (except USA and Canada).
- This repeater is designed for a 13.8 V DC power source! Never use a 24 V DC or higher source to power the repeater.
- Use only the supplied DC cord.
- Do not remove the ferrite core attached to the DC cord. Doing so may cause interference with radio communications.
Unpacking and Checking Equipment
Follow these steps to unpack and check the equipment:
- Carefully unpack the repeater.
- Identify the items listed in the provided table before discarding the packing material.
- If any items are missing or have been damaged during shipment, file a claim with the carrier immediately.
FCC Warning
Changes or modifications to the equipment may cause harmful interference
unless expressly approved in the instruction manual. Unauthorized changes or
modifications can result in the loss of authority to operate the equipment.
Information to the Digital Device User Required by the FCC
This equipment has been tested and found to comply with the limits for a Class
B digital device, providing reasonable protection against harmful interference
in a residential installation.
Installation
To install the handles onto the front panel of the repeater:
- Align the handles with the holes on the front panel.
- Secure the handles using the supplied screws.
Please consult your dealer for installing the repeater and antenna.
Microphone
Connect an optional KMC-30, KMC-35, or KMC-9C Kenwood microphone to the
MICROPHONE jack on the front panel.
NXR-900/ NXR-901 INSTRUCTION MANUAL
800MHz DIGITAL BASE-REPEATER/ 900MHz DIGITAL BASE-REPEATER
THANK YOU!
We are grateful you purchased this Kenwood repeater. We believe this easy-
to-program repeater will be highly effective in your communications system,
and will keep personnel operating at peak efficiency. Kenwood incorporates the
latest in advanced technology into all of our products. As a result, we feel
strongly that you will be pleased with the quality and features of this
product.
PRECAUTIONS
- Do not expose the unit to rain or moisture; to prevent fire or electric shock.
- Do not open the unit under any circumstances; to avoid risk of electric shock.
- Do not expose the unit to long periods of direct sunlight, nor place it close to heating appliances.
- Do not place the unit in excessively dusty and/or humid areas, nor on unstable surfaces.
- If you detect an abnormal odor or smoke coming from the unit, disconnect the power from the unit immediately. Contact your Kenwood service center or dealer.
NOTICES TO THE USER
- Government law prohibits the operation of unlicensed radio transmitters within the territories under government control.
- Illegal operation is punishable by fine and/or imprisonment.
- Refer service to qualified technicians only.
FCC WARNING
This equipment generates or uses radio frequency energy. Changes or
modifications to this equipment may cause harmful interference unless the
modifications are expressly approved in the instruction manual. The user could
lose the authority to operate this equipment if an unauthorized change or
modification is made.
INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE FCC
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can generate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that the interference will not occur
in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer for technical assistance.
CAUTION
- This repeater is intended for use as a fixed base station with the antenna located outdoors on the rooftop or on an antenna tower. (except USA and Canada)
- This repeater is designed for a 13.8 V DC power source. Never use a 24 V DC or higher source to power the repeater.
- Use only the supplied DC cord.
- Do not remove the ferrite core attached to the DC cord. Doing so may cause interference with radio communications.
UNPACKING AND CHECKING EQUIPMENT
Note : The following unpacking information is for use by your Kenwood dealer, an authorized Kenwood service center, or the factory. Carefully unpack the repeater. We recommend that you identify the items listed in the following table before discarding the packing material. If any items are missing or have been damaged during shipment, file a claim with the carrier immediately.
| Item | Part Number | Quantity |
|---|---|---|
| Front glass | B10-2781-XX | 1 |
| Dressed screw | N08-0563-XX | 1 |
| Bracket | J29-0725-XX | 2 |
| Flat head machine screw | N32-4008-XX | 4 |
| Handle and screw set | K01-0421-XX | 1 |
| DC cord | E30-3344-XX | 1 |
| Lead wire with connector (15 pin) | E37-1381-XX | 1 |
| Fuse (7.5 A) | F05-7521-XX | 1 |
| SYNC Cable | E30-7701-XX | 1 |
| Instruction Manual | B62-2410-XX | 1 |
INSTALLATION
To install the handles onto the front panel of the repeater, align the handles with the holes on the front panel, then secure the handles using the supplied screws. Please consult your dealer for installing the repeater and antenna.
MICROPHONE
Connect an optional KMC-30, KMC-35, or KMC-9C Kenwood microphone to the
MICROPHONE jack on the front panel.
OCXO UNIT (KXK-3): Option
The OCXO unit (KXK-3) is an Oven Controlled Crystal Oscillator (OCXO) unit.
CONTROLS AND FUNCTIONS
Front Panel
-
Speaker
-
CH/STATUS Display
Two 17-segment digits display the channel number, name, or status. -
STATUS indicator
Indicates the status of the repeater. (NXDN mode) -
Programmable Function keys
Press these keys to activate their programmable functions. -
COM jack
Connect to the PC using a RS-232C standard DB9 (Female) cross cable. -
VOLUME control
Turn clockwise until a click sounds, to unmute the audio. Rotate to adjust the audio. Turn counterclockwise fully to mute the audio. -
MICROPHONE jack
Connect a microphone to this 8-pin modular jack. -
POWER indicator
Lights green when power is supplied to the DC 13.8V jack. Blinks red when an abnormal voltage is present. While blinking, the repeater cannot be used. -
TX indicator
Lights red while transmitting. -
BUSY indicator
Lights green while a signal is being received. -
OCXO indicator
The OCXO indicator shows the state of the reference
MHz oscillator :- Lights Green when using a reference signal from an optional OCXO unit (KXK-3).
- Lights Orange when using a reference signal from another repeater.
- Lights red when no reference signal is available or when an error occurs.
- Does not light when the reference signal is an internal VCXO signal.
-
CTRL indicator
The CTRL indicator shows the control channel status while using Digital trunking :- Lights Green when the repeater is used as control channel.
- Blinks Green when using a non-dedicated control channel.
Rear Panel
-
RX IN jack
Connect an RX antenna or a duplexer to this BNC receptacle. -
TEST/SPKR jack
Test input/output jack. Connect an external speaker to this jack. -
CONTROL I/O jack
Connect a repeater controller or a remote panel to this DB-25 interface. -
SYNC 1 / 2 jack
Connect to another repeater to use synchronous frame signaling for digital trunking. -
LAN jack
Connect to Ethernet. -
REF OUT jack
Connect to another repeater within the site to supply a reference signal. -
REF IN jack
Connect from another repeater within the site to receive a reference signal. -
FUSE
Insert 7.5 A blade fuse into this fuse holder. -
DC 13.8V jack
Connect a 13.8 V DC power supply to this jack. -
TX OUT jack
Connect a TX antenna or a duplexer to this BNC receptacle.
REPEATER OPERATION
Note : Please consult your dealer for programming the repeater. Due to the frequency stability on the 6.25 kHz bandwidth channel, when operating the repeater using an optional OCXO unit, allow the unit to warm up after turning the power on. Refer to the KXK-3 instruction manual concerning the warm up duration.
After turning on the power, wait for approximately 10 seconds for the VCXO or 5 minutes for the OCXO (when mounting) to warm up. During this time, the CH/STATUS Display will blink. The keys will function when they are pressed.
When power is applied to the unit, the POWER indicator lights green. Turn the
VOLUME control clockwise until a click sounds, to unmute the audio. Rotate to
adjust the audio. Turn the VOLUME control counterclockwise fully to mute the
audio.
The BUSY indicator lights green while receiving a signal and the TX indicator
lights red while transmitting.
TRANSCEIVER OPERATION
Receive
Adjust the volume to your desired level. You may need to readjust the volume
if you are having interference while receiving a message from your dispatcher
or another member in your fleet. The BUSY indicator lights green while a
signal is being received.
Transmit
- Listen to the channel before transmitting, to make sure it is not being used.
- Press the microphone PTT switch, then speak in your normal speaking voice. The TX indicator lights red while transmitting.
- When you finish speaking, release the PTT switch.
© B62-2410-00 (K)
09 08 07 06 05 04 03 02 01 00
Frequently Asked Questions
Can I use this repeater without a license?
No, government law prohibits the operation of unlicensed radio transmitters within controlled territories.
Can I power the repeater with a 24 V DC source?
No, this repeater is designed for a 13.8 V DC power source. Using a higher voltage may damage the repeater.
What microphones are compatible with this repeater?
You can connect an optional KMC-30, KMC-35, or KMC-9C Kenwood microphone to the MICROPHONE jack on the front panel.