Tower Mounted Low Noise Amplifier
DLNA-450

 

 

International: http://www.orlando-systems.com  

Tower Mounted Low Noise Amplifier
DLNA-450

Features

          Increased up-link coverage range.

          Improved Base Station receiver sensitivity.

          Increased handphone battery lifetime.

          Bypass operation mode in case of failure or P.S. outage.

          Local Alarm and Remote Control accessibility.

          Easy installation using the existing B.S. equipment, cable, antenna.

Description:

   The DLNA-450 tower mounted LNA is a member of the product family developed and manufactured by the TELETECHNIKA Engineering Ltd., where the other members of the product  family are operating in the 900 MHz GSM and 1800 MHz DCS bands.

   The RF Part of the equipment consists of a high selectivity RF filter and a Low Noise Amplifier (LNA). In order to avoid intermodulation products the LNA possesses a high third order interception point (IP3). The RF Part is in a weatherproof  container. Its  power supply is performed via the inner conductor of the coaxial cable. The container has to be mounted near the antenna. In the case of failure or power supply outage a bypass circuit assures the way of the received signal.

 A Byas-Tee connected to  the indoor Power Supply and Alarm Rack is used to decouple the DC from the B.S. equipment. The primary voltage of the rack is -48V, however a 220 V / 50 Hz AC supply can be ordered as an option.  Besides the visual local alarm there are relay contacts available for remote control signalling. One rack can supply 2 to 6 outdoor containers depending on the built-in alarm panels.

Technical data

System

NMT-450

 

Frequency Band (BS RX/Mobile TX)

453 - 457.5

MHz

Temperature Range
- Outdoor RF Unit
- Indoor units


-30 to +55
   0 to +50


0C
0C

Outdoor RF Unit

 

 

Type

DLNA-450

 

Gain

16 1

dB

Noise Figure (25 5 0C), typ.

2.5

dB

Noise Figure over temperature range, max.

3.0

dB

Bypass mode insertion loss, max.

2.5

dB

Pass-Band Bandwidth (fmin to fmax)

4.5

MHz

Return Loss in Pass-Band, min.

16

dB

Rejection DC to (fmin - 5.5 MHz), min.

50

dBr

Rejection (fmax+ 5.5 MHz) to 1000 MHz, min

55

dBr

Input Power causing no damage, max.

15

dBm

O/P 3-rd order Intercept Point (IP3), min.

30

dBm

Impedance (input, output)

50

ohm

Connectors

N- or 7/16 (f)

 

Indoor Equipment

 

 

Power Supply and Alarm Equipment

 

 

No. of connectable RF Units

2 to 6

 

Input primary voltage

-48

V

Supply Voltage (via coaxial cable)

+15

V

Current consumption per RF Unit, typ.

150

mA

Current consumption per RF Unit, max.

200

mA

Condition of alarm (bypass status)

failure of the LNA or
outage of the power supply

Indication of alarm

built-in test of the DC
current consumption

Connection to a remote control system

via relay contacts

DC Bias-Tee

 

Input Power, max.

50

W

Insertion Loss, max.

0.2

dB

DC Current, max.

2

A

RF impedance

50

ohm

Connectors

N or 7/16

 

 

For development purposes manufacturer reserves the rights to make any technical data changes irrelevant to base specifications.


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