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Axell Wireless Limited 

Technical Literature 

UHF Dual Band Line Amplifier 

Document Number 55-227901HBK

 

Issue No. 4 

Date 23/06/2014 

Page 25 of 30 

 

 

5.1.7. 

Service Support 

Advice and assistance with maintaining and servicing this system are available by contacting 
Axell Wireless Ltd., see Contact Information. 

 

NOTE 

 

Individual modules are not intended to be repaired on site and attempts at repair will 

invalidate active warranties. Company policy is that individual modules should be repaired 

by replacement. Axell 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 successfully service this Axell Wireless product 

are as follows:- 

 

Spectrum analyser 

100kHz to 2GHz (Dynamic range = 90dB). 

Signal Generator 

30MHz to 2GHz (-120dBm to 0dBm o/p level). 

Attenuator 

20dB, 10W, DC-2GHz, (N male 

– N female). 

Test Antenna 

Yagi or dipole for operating frequency. 

Digital multi-meter 

Universal Volt-Ohm-Amp meter. 

Test cable x 2 

N male 

– N male, 2M long RG214. 

Test cable x 2 

SMA male 

– N male, 1m long RG223. 

Hand tools 

Philips #1&2 tip screwdriver. 
3mm flat bladed screwdriver. 
SMA spanner and torque setter. 

 
 

 

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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