Axell Wireless 55-227901 Product Description And User'S Manual Download Page 21

Axell Wireless Limited 

Technical Literature 

UHF Dual Band Line Amplifier 

Document Number 55-227901HBK

 

Issue No. 4 

Date 23/06/2014 

Page 21 of 30 

 

 

4. 

Installation 

– General Notes 

4.1. 

General Remarks 

When this equipment is initially commissioned, please keep a record of the initial set-up parameters, 
this  will  help  both  the  installation  personnel  and  Axell  Wireless  should  these  figures  be  needed  for 
future reference or diagnosis. 
 
 
The  procedure  for  installing  and  commissioning  an  Axell  Wall  Mount  Line  Amplifier  is  generally  as 
follows: 
 
1) 

Secure the Line Amplifier in the chosen wall position. 

 
2) 

Fix the antenna and connect its cables to the Amplifier antenna ports. 

 
3) 

Connect a suitable mains or battery power supply to the Amplifier 

 
4) 

Calculate the attenuation settings required for the uplink and the downlink paths, and set the 

 

attenuators as described elsewhere in this document. 

 
5) 

Switch the equipment mains on with the small switch located inside the Amplifier on the lower 

 

right hand side of the case. 

 
6) 

If  Input  RF  is  available,  then  make  test  calls  via  the  Amplifier  to  ensure  correct  operation,  if 

 

possible monitoring the signal levels during these calls to ensure that the uplink and downlink 

 

RF levels are as anticipated. 

 
 

4.2. 

Electrical Connections 

 
It is recommended that the electrical mains connection is made by a qualified electrician, who must be 
satisfied that the supply will be the correct voltage and of sufficient capacity. 
 
All electrical and RF connections should be completed and checked prior to power being applied for 
the first time. 
 
Ensure that connections are kept clean and are fully tightened. 
 
 

4.3. 

RF Connections 

 
Care must be taken to ensure that the correct connections are made with particular attention made to 
the base station TX/RX ports. In the event that the base transmitter is connected to the RX output of 
the equipment, damage to the equipment will be done if the base station transmitter is then keyed. 
 
 

4.3.1. 

Termination of Unused Ports 

 
In the event that any RF ports are unused (available for future expansion) these ports must be kept 
terminated with the load terminations supplied by Axell for that purpose 
Ensure that connections are kept clean and are fully tightened. 
 
 
 

 

Summary of Contents for 55-227901

Page 1: ...e 23 06 2014 Page 1 of 30 UHF Dual Band Line Amplifier Product Description and User s Manual Product Part No 55 227901 Axell Wireless Limited Head Office Aerial House Asheridge Road Chesham Buckingham...

Page 2: ...correction of errors and the aforementioned advisory services This document has been prepared to be used by professional and properly trained personnel and the customer assumes full responsibility wh...

Page 3: ...the right to change the contents without prior notice The information furnished by Axell Wireless in this document is believed to be accurate and reliable However Axell Wireless assumes no responsibi...

Page 4: ...rence by one or more of the following measures Ensure that the input levels to the Line Amplifier are correct and that the equipment gain is not excessive Isolate or Relocate the Server Radiating ante...

Page 5: ...FCC deployment rule regarding the radiation of noise Good engineering practice must be used in regard to the signal booster s noise radiation Thus the gain of the signal booster should be set so that...

Page 6: ...power carrying components were to be carelessly touched Where the equipment is used near power lines or in association with temporary masts not having lightning protection the use of a safety earth c...

Page 7: ...g Uplink RF path and components 15 3 7 Front View 16 3 8 Side Views 17 3 9 Interior Picture Downlink Path 18 3 10 Interior Picture Uplink Path 19 3 11 Specification 20 4 Installation General Notes 21...

Page 8: ...his chapter provides information on the donor source feed and server output radiating infrastructure associated with the Line Amplifier equipment 1 1 Base Donor Input The Base Donor input is normally...

Page 9: ...obile Signal Line Amplifier Output cable attenuation dB 100ft cable coupling dB distance correction e g Typical 7 8 cable loss 0 7dB 100 with Coupling Loss 80dB 6 Thus for an 800 cable with 10dBm inpu...

Page 10: ...onment does not exceed 50 C 122 F 2 2 2 Wall Compatibility Check the suitability of the wall on which the Line Amplifier is to be mounted The Line Amplifier wall mount brackets assembly should be fixe...

Page 11: ...8dB gain The amplified signal is then fed via a diode attenuator module 5 or 11 which forms part of the ALC feedback control loop The ALC attenuator then feeds the signal into an output amplifier 6 or...

Page 12: ...016401 AGC Attenuator 17 016401 LNA 11 008901 LNA 11 008901 28dB 28dB AGC Detector 17 019801 AGC Detector 17 019801 AGC Detector 17 019801 AGC Detector 17 019801 Isolator 08 004014 Isolator 08 004014...

Page 13: ...ain 11 008901 11 496 0 MHz 496 9MHz D L path AGC Attenuator Module 17 016401 12 496 0 MHz 496 9MHz D L path Power Amplifier 20dB Gain 12 021601 13 496 0 MHz 496 9MHz D L path AGC Detector Module 17 01...

Page 14: ...P U L I P 20dB Test Port Date 18 February 2014 AWL 2014 Page 1 of 1 Size A4 Issue 1 Drawn by AJS Not to Scale 55 227901 Exploded schematic showing Downlink RF path and components Aerial House Asheridg...

Page 15: ...O P U L I P 20dB Test Port Date 18 February 2014 AWL 2014 Page 1 of 1 Size A4 Issue 1 Drawn by AJS Not to Scale 55 227901 Exploded schematic showing Uplink RF path and components Aerial House Asheridg...

Page 16: ...lifier Document Number 55 227901HBK Issue No 4 Date 23 06 2014 Page 16 of 30 3 7 Front View A Green LED POWER ON illuminated during normal operating conditions B Red LED ALARM illuminated during alarm...

Page 17: ...e 23 06 2014 Page 17 of 30 3 8 Side Views A Common RF port D L I P and U L O P Base port B Common RF port D L O P and U L I P Mobile port C 20dB test monitor port D 3 Pole panel plug AC Input E 6 Pole...

Page 18: ...enuator E 496 0 MHz 496 9MHz Downlink path Variable Attenuator F Downlink paths Low Noise Amplifiers and AGC Detector and Attenuator Modules G 489 5 MHz 491 0MHz Downlink path Power Amplifier H 496 0...

Page 19: ...hind panel F 492 5 MHz 494 0MHz Uplink path Variable Attenuator G 499 0 MHz 499 9MHz Uplink path Variable Attenuator H Uplink paths Low Noise Amplifiers and AGC Detector and Attenuator Modules I 492 5...

Page 20: ...CC In Band Spurious Noise 30kHz B W 30dBm Uplink Frequency Range Band 1 492 5 494 0MHz Frequency Range Band 2 499 0 499 9MHz Maximum Gain 47dB Gain Adjustment manual adjustment 0 30dB in 1dB steps Max...

Page 21: ...6 If Input RF is available then make test calls via the Amplifier to ensure correct operation if possible monitoring the signal levels during these calls to ensure that the uplink and downlink RF lev...

Page 22: ...rrectly as expected check all connections to ensure that they are to the correct port that the interconnecting cables are not faulty and that they are tightened The majority of commissioning difficult...

Page 23: ...e configuration 5 1 2 Fault Isolation In the event that the performance of the system is suspect a methodical and logical approach to the problem will reveal the cause of the difficulty The System con...

Page 24: ...n accordance with the test specification and that the coverage is checked by survey It is important to bear in mind that the system includes a radiating cable network and base stations that may be fau...

Page 25: ...l Wireless Ltd maintains a level of stock of most modules which can usually be despatched at short notice to support this policy 5 2 Tools Test Equipment The minimum tools and test equipment needed to...

Page 26: ...ay have to be connected first 3 Replace retaining screws if any 4 Double check all connections before applying power 5 3 4 Power Amplifier Replacement general procedure 1 Remove power to the unit Swit...

Page 27: ...t the RF cables to the LPA input and output connectors Reconnect the DC supply connector and turn the mains switch on Note Tighten SMA connectors using only a dedicated SMA torque spanner If SMA conne...

Page 28: ...used to minimise phase discrepancies when joining signal paths of differing frequencies DAS Distributed Antenna System DC Direct Current Downlink D L Signals transmitted from the BTS to the Mobiles DS...

Page 29: ...Axell Wireless Limited Technical Literature UHF Dual Band Line Amplifier Document Number 55 227901HBK Issue No 4 Date 23 06 2014 Page 29 of 30 A 2 Key to Drawing Symbols used in this document...

Page 30: ...Amplifier Document Number 55 227901HBK Issue No 4 Date 23 06 2014 Page 30 of 30 A 3 Document Amendment Record Issue No Date Incorporated by Section Amended Reason for new issue 1 10 01 2014 AJS Draft...

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