Uniden Um50 User Instruction Manual Download Page 2

TYPICAL VEHICLE INSTALLATION

1

3

4

2

Outdoor Antenna

Distribution Antenna

Booster

DC Power Connection

1

2

3

4

INITIAL SETUP INSTALLATION & ASSEMBLY:

During this process you will connect the outdoor signal antenna, interior distribution 

antenna and the 12V power supply to the Uniden UM50 booster unit as follows:

OUTDOOR SIGNAL ANTENNA

Please connect the magnetic base unit to the outdoor antenna and place it on the 

metal roof of the vehicle. Try to keep it as far away from the interior antenna as 

possible. Once you have found the desired positioning for your outdoor antenna, 

connect it directly to the booster on the connection marked “Outdoor”

INTERIOR DISTRIBUTION ANTENNA

Identify an appropriate location for the interior antenna and keep it as far away 

as possible from the location of the outside antenna. Once you have found the 

desired position for your indoor antenna, connect it directly to the booster on the 

connection marked “Indoor”

BOOSTER PLACEMENT

You should place the booster in an easily accessible location within your vehicle 

i.e. Under the passenger seating, in the rear of the vehicle or any other location 

that keeps the booster hidden out of sight. Please DO NOT  keep the booster in a 

location that is continuously  exposed to sunlight as it can overheat.

COMMISSIONING THE SYSTEM

Plugging in the power will switch the Uniden UM50 ON causing the “Power” 

LED light on the backside of the unit to remain lit indicating the unit is properly 

powered.

1

2

3

4

Explanation of LED Light Indicators located on the rear of the unit

The intelligent Automatic Gain Controls (AGC) in the Uniden UM50 enables it to reduce 

the gain of the booster automatically and store these settings in the devices memory 

unit. The UM50 will then continue to automatically scan the frequency and self adjust 

accordingly every 5 seconds.

On the backside of the unit, there are three LED lights labeled: ”High” alarm, “Power” 

and “Low” alarm. When the unit is plugged in, the LED “Power” light should be a solid 

green color. 

Orange LED alarm lights

 indicate the booster is automatically adjusting the gain. In 

which case, the booster is functional.

Red LED alarm lights

 

indicate oscillation (feedback) is severe and additional 

distance between the indoor and outdoor antenna is required.  If the LED light 

continuously stays red, the UM50’s Automatic Gain Control will attenuate the signal 

strength in order to stop the booster from oscillating.

Green LED alarm lights

 indicate the booster is functioning properly.

* Three solid green lights indicate the booster is functioning properly. 

The                trademark is owned by                

America Corporation and its affiliates is used under license by Signifi Mobile.

SMA Female Connector (50 ohm)

LED Gain Control Alarm Indicator

LED Power Indicator

Power Input 12v

Reviews: