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Features

E1 Spread Spectrum Radios

2-1

2 Features

2.1 E1 Spread Spectrum Radios

E1 Spread Spectrum Radios is different from the traditional microwave equipment in smaller size, lighter

weight, easy set up and can be conveniently moved from place to place. The main characteristics lie in its

advantageous use of high frequency band microwave transmission, digital process, concise structure, quick

connection and adapt to complex topographical structure. Extensively use in nested mobile phone base

station’s interconnection and signal transmission, short distance local connection and urgent communication.

Public and specialized network has large application as well. The present wireless low frequency band is

jam-packed and with the demand to build a quicker communication network, the use of high frequency band

E1 Spread Spectrum Radios becomes especially meaningful.

2.2 Core

Technology

The technologies incorporated in E1 Spread Spectrum Radios include:

(1) High frequency microwave RF unit and other related RF components design technique (PA, LNA, MIX,

DUX etc.)

(2) High frequency Synthesizer

(3) High amplifier gain control technique

(4) Advanced QPSK de/modulation

(5) Microwave frame multiplexer

(6) Digital equalizer

(7) FEC:Forward Error Correction

(8) Random N*E1 multiplexer, where N=1~16

(9) Digital cross-connection

(10) Computer monitors and relays

(11) Network management

(12) Digital service

(13) Highly efficient and improved overall design

Audio frequency: Each voice signal is 64kbps. It has 8kHz sample, 8bits-per-sample, A/D and D/A

conversions.

E1 is European Standard. 1*E1 is 30 voice channels, plus a frame control and a signaling i.e. 32*64kbps =

2.048Mbps

Содержание E1

Страница 1: ...1 ...

Страница 2: ...vice must be professionally installed z For safety reasons the working condition must not alters the RF signal When installing this equipment observe the following precautions to minimize the danger of personnel injury 1 Antenna used for this device must be fix mounted on permanent outdoor structures to provide 5 meters or more separation from all persons during device operation to comply with FCC...

Страница 3: ...s obstructs or repeatedly interrupts a legitimate radio communication service it is required to terminate the operation and take steps to improve so as to eliminate future interference zLow power RF devices MUST tolerate all legitimate ISM band interferences z The above legal telecommunications are based on the Telecommunications Act of Radio Telecommunication Equipment ...

Страница 4: ... 4 7 4 2 1 General Description 4 7 4 3 Date Port Guide 4 8 5 Interface 5 1 5 1 Front Panel 5 1 5 1 1 Engineering Order Wire EOW 5 1 5 1 2 LCD Description 5 2 5 2 LCD Operation 5 5 5 2 1 IDU Info 5 5 5 2 2 ODU Info 5 10 5 2 3 Test Item 5 12 5 2 4 Remote Info 5 20 5 2 5 IP Info 5 22 5 2 6 LAN Info 5 25 5 2 7 Self Test Info 5 27 5 2 8 Link Info 5 29 6 Environmental Condition 6 1 6 1 Cable 6 1 6 2 Ope...

Страница 5: ... 3 Link 8 12 8 2 4 User I O 8 13 8 2 5 Cross Connect 8 14 8 2 6 Alarm Mask Setting 8 15 8 2 7 LAN 8 16 8 2 8 Status 8 17 8 2 9 Alarm Status 8 17 8 2 10 Tributary Input Status 8 18 8 2 11 User I O Status 8 18 8 2 12 Get Event Record 8 19 8 2 13 Test 8 21 8 2 14 PRBS 8 22 8 2 15 Unit Identification 8 23 8 3 Change Password 8 24 8 4 Set System Date and Time 8 24 8 5 Update Standby Configuration 8 25 ...

Страница 6: ...ODU IF RF Status 10 10 10 5 1 5 8GHz Status 10 10 10 6 The Definition of Pins 10 11 10 7 Installation Guide 10 14 10 7 1 Parts of ODU assembly 10 14 10 7 2 ODU Installation Diagram 10 15 10 7 3 IDU ODU Quick Installation 10 16 10 8 RSL and Link Budget 10 17 10 9 Troubleshooting 10 18 10 9 1 Can Not Establish a Link 10 18 10 9 2 Establish a Link but Poor Performance 10 19 10 9 3 Pre RMA and RMA Pro...

Страница 7: ...ttings 4 4 10 Figure 5 1 IDU Function Tree 5 2 Figure 5 2 LCD Function Keys 1 5 2 Figure 5 3 LCD Function Keys 2 5 3 Figure 5 4 Alarm Status 5 4 Figure 5 5 Alarm Function 5 4 Figure 5 6 Buzzer OFF 5 4 Figure 5 7 IDU Info 5 5 Figure 5 8 EOW No n 5 5 Figure 5 9 IDU Type nXE1 5 6 Figure 5 10 Code HDB3 AMI 5 6 Figure 5 11 Code Switch 1 5 7 Figure 5 12 Code Switch 2 5 7 Figure 5 13 Code Switch 3 5 7 Fi...

Страница 8: ...n Dis 1 5 19 Figure 5 39 IF Loop En Dis 2 5 19 Figure 5 40 RF Loop En Dis 5 20 Figure 5 41 Close Test 5 20 Figure 5 42 Remote Info 5 20 Figure 5 43 Link ID n 5 21 Figure 5 44 Far End OK Alarm Loss Test 5 21 Figure 5 45 R AUX1 RS 232 RS 422 5 22 Figure 5 46 R AUX2 ASY CH SYN CH 5 22 Figure 5 47 ETH IP 5 22 Figure 5 48 ETH Mask 5 23 Figure 5 49 NMS1 IP 5 23 Figure 5 50 NMS1 Peer IP 5 23 Figure 5 51 ...

Страница 9: ... Figure 7 7 Configuration Process of HyperTerminal 2 7 4 Figure 7 8 Configuration Process of HyperTerminal 3 7 4 Figure 7 9 Configuration Process of HyperTerminal 4 7 5 Figure 7 10 Configuration Process of HyperTerminal 5 7 5 Figure 8 1 Main Menu of Textmenu 8 1 Figure 8 2 Network 8 2 Figure 8 3 NMS1 Serial Interface 8 2 Figure 8 4 NMS2 Serial Interface 8 3 Figure 8 5 NMS2 Dial Setting 8 4 Figure ...

Страница 10: ...2 Figure 8 35 Loopback 8 23 Figure 8 36 Unit Identification 8 23 Figure 8 37 Change Password 8 24 Figure 8 38 Set System Date and time 8 24 Figure 8 39 Update Standby Configuration 8 25 Figure 8 40 Restart 8 25 Figure 8 41 Load Default Configuration 8 26 Figure 8 42 Firmware Download 8 26 Figure 8 43 User Management 8 27 Figure 9 1 Managment via Local Equipment Normal 9 1 Figure 9 2 Managment via ...

Страница 11: ...tructure 10 2 Table 10 4 Temperature and Environment 10 2 Table 10 5 Network Management System 10 2 Table 10 6 IF Cable 10 2 Table 10 7 Power 10 3 Table 10 8 Service Channel 10 3 Table 10 9 LCD Alarm Items 10 5 Table 10 10 LCD Function 10 6 Table 10 23 5 8GHz Spread Spectrum List 16E1 Side A 10 9 Table 10 24 5 8GHz Spread Spectrum List 16E1 Side B 10 9 Table 10 25 DB9 female pins of NMS1 10 11 Tab...

Страница 12: ...holly into Wireless Digital Telecommunication E1 Spread Spectrum Radios has been extensively use in post and telecommunication service electric power military affairs various specialized network especially in the interconnection between base stations of mobile communication large enterprises schools and universities network connection It is regarded as one of the quickest linkage method and has be...

Страница 13: ...with the demand to build a quicker communication network the use of high frequency band E1 Spread Spectrum Radios becomes especially meaningful 2 2 Core Technology The technologies incorporated in E1 Spread Spectrum Radios include 1 High frequency microwave RF unit and other related RF components design technique PA LNA MIX DUX etc 2 High frequency Synthesizer 3 High amplifier gain control techniq...

Страница 14: ...te unit and power processing board IDU mainly comprised of QPSK modulator multiplexer monitor unit NMS digital service power system other interfaces etc Antenna systems include antenna connectors and other installation accessories for fixing to the pole or stand ODU and IDU are connected by an IF cable Figure 2 1 E1 IDU Block Diagram 2 3 2 System Principle N number of E1 signals digital service 96...

Страница 15: ...g unit to function as monitoring controlling dispatching alarming processing and signaling etc Based on the statistical result of BER test in the multiplexer we have 10 3 BER 10 6 BER and frame loss signals Digital service adopts the Analog rule of 64kbps and PCM Pulse Code Modulation for service relay complete address selection and full address function Simulating transfer completes the multiple ...

Страница 16: ...rum Radios has the following technological characteristics Complete capacity 2 E1Ε4 E1sΕ8 E1Ε16 E1 Simplified set up The ODU s Signal Indicator indicates the correct angle adjustment of the antenna Flexible interface suitable for multiple network and service links IDU and ODU unit connected by a single IF cable up to 200m length thereby decreasing the RF transmission loss and increasing the receiv...

Страница 17: ...door IDU Modem Figure 4 1 Front Panel 4E1 BNC Figure 4 2 Front Panel 4E1 RJ 48 Figure 4 3 Front Panel 16E1 LAN RJ 48 Table 4 1 Accessories List No Item Qty 1 RS 232 Cable 1 2 Cross over Cat 5 Cable 1 3 48V Power Cord 1 4 Grounding Cable 1 5 Fuse 1 A B C E J F G H K L M N O D P Q ...

Страница 18: ...ates remote unstable condition TEST indicates system undergoing loopback test Table 4 2 Definition of LED Item Definition Flashes 4Hz System is initializing ON System is initializing or system is working well FINE green OFF Severe alarm happens which affects normal communication Flashes 4Hz Minor alarm happens which doesn t affect normal communication ON On when alarm happens which affects normal ...

Страница 19: ...n computer NMS2 port It also could be used as a connection port for modem which allows customer to implement remote access When there are more than two sets of equipments in the local stations connect the IDU NMS2 of this equipment to the IDU NMS1 of the other equipment When the NMS2 are connected only one of the service phones is working G Monitor port NMS1 This port is for cascading connection b...

Страница 20: ...t mode z Finishing the enter process of password K User I O Port Allows users to fully monitor the central controlling room from the local station For example In the absence of human control in the remote stations the central controlling server is able to receive all the data like fire alarms power supply etc It can also control the light switches oil switches etc This function totally realizes th...

Страница 21: ...utput Diagram 2 Alarm Relay Output You could choose following alarm types for output Tx when alarm happens concerning Tx Rx when alarm happens concerning Rx and Tx Rx when alarm happens concerning both Tx Rx The chosen alarm level is low These alarms are important alarms and would influence normal transmission When alarm happens the relay stays in NO 3 User Input Relay Output User could choose use...

Страница 22: ...g network to manage the system You should use a cross over cable to connect with your computer Q Ethernet Transmission Port You could implement 10 100BaseT Ethernet transmission via this port 9 ETH LAN port and Ethernet Transmission port are independent and can t communicate with each other Table 4 4 The Definition of LED in Ethernet Transmission Port Item Mark Definition 1 COL Orange On Collision...

Страница 23: ... ODU RF Unit Figure 4 8 ODU Display 4 2 1 General Description A Antenna Alignment Indicator If there is no electric meter during set up this indicator helps to define the antenna alignment Higher the signal strength indicates better antenna alignment E D C F B A ...

Страница 24: ...se entwine waterproof tape at the connection point so as to prevent rainwater or moisture from the device Natural damage is not warranted F IF Port N Type 50ȍ Transmission includes transmitter 310MHz receiver 70MHz monitor 11 0592MHz DC 48V 0 5A Maximum transmission of 100m possible when using RG 6 cable Maximum transmission 200m possible when using RG 8 cable 4 3 Date Port Guide The given example...

Страница 25: ...4 9 continue Figure 4 10 Data Port Settings 2 STEP 3 The COM1 Properties window will appear Set the Bits per second to 9600 Data Bits to 8 Parity to None Stop Bits to 1 Flow Control to None and click OK to continue Figure 4 11 Data Port Settings 3 ...

Страница 26: ...Product Description E1 Spread Spectrum Radios 4 10 Figure 4 12 Data Port Settings 4 ...

Страница 27: ...n of selective and entire calling it also has the following most distinguishing features whole tone service like dial tone engage tone out of order tone etc Users do not feel much difference in using service phone from general phone service because it is very user friendly and fits all the demands of users We can also use textmenu to set up the service phone numbers 9 Dial tone When dialing from t...

Страница 28: ...LCD Function Keys 1 For the LCD to fully display the system s status and perform those simple set up operations try to make use of the above mentioned five function keys to carry out the operations Under normal condition the LCD displays as below ESC Exit SEL Select Ż Left Arrow Ź Right Arrow OK Confirm ...

Страница 29: ...real time online receiving power T xxxdBm stands for the real time online transmitting power Right hand side On the right hand side it displays the bit error rate BER Note Bit Error Rate BER The conversion formula for accumulated bit errors is BER n EN S where n number of times of bit error EN rate of the equipment E1 s rate is 2 048MΙS running time in seconds For example Present bit error times i...

Страница 30: ...gure 5 5 Alarm Function Whenever there is an alarm the LCD back light will light for 2 minutes and the buzzer sounds goes off Other than removing the alarm status or switching off the buzzer status we can switch off the buzzer by pressing the SEL button To switch on the buzzer please enter the IDU Info Buzzer On Off Figure 5 6 Buzzer OFF 1 Message in the next page 2 Press to read the next page 3 T...

Страница 31: ...r Wire In the same link route system there can be a maximum series connection of 255 service phone NMS software is used for the service phone s initial set up Figure 5 8 EOW No n A2 IDU Type nXE1 as in A2 display press Ź Display the number of E1 capacity If it displays 4XE1 it means that the equipment has four E1 interface In this manual we have taken 4E1 equipment as an example for easy explanati...

Страница 32: ...whenever there is a run of 4 or more 0 s This and similar more complex codes have replaced AMI in modern distribution networks The purpose of this is to prevent long runs of 0 s in the data stream sometimes called a run length limited code Encode any pattern of more than four bits as B00V where B is a balancing pulse The value of B is assigned as or so as to make alternate V s of opposite polarity...

Страница 33: ...ess OK 9 P Place A Adjust Figure 5 12 Code Switch 2 Figure 5 13 Code Switch 3 4 Error Password is displayed on entering the wrong password It will not save the wrong password This will be display for 5 10sec and then return to the main function display This sign allows the use of Right Left arrow to select the functions P mode use the Right Left button to A mode 0 9 digits use the Right Left butto...

Страница 34: ...nsfer simple file and data transmission between local and remote equipment through RS232 or RS422 Figure 5 15 AUX1 RS232 RS422 A5 AUX2 ASY CH SYN CH Select either ASY CH for asynchronous channel or SYN CH for synchronous channel Figure 5 16 AUX2 ASY CH SYN CH A6 I Temp nк Display the local ODU s working temperature ...

Страница 35: ...Off switch 9 In any other screens you could press SEL to close the buzzer when it beeps Ex Figure 5 18 Buzzer On Off A8 Restart EMU Y N Restart the E1 Radios system EMU stands for Embedded Unit Press OK to enter the setup function This sign shows you may use the Right Left arrow to select OFF Press OK ...

Страница 36: ...e E1 Spread Spectrum Radios 5 10 Figure 5 19 Restart EMU Y N A9 Power 36 72V Display the power supply Figure 5 20 Power 36 72V 5 2 2 ODU Info Figure 5 21 ODU Info B1 RF CH n Display the ODU s current RF channel ...

Страница 37: ...splay the transmitting power level Figure 5 23 TxL SET ndBm B3 SSPA On Off To set the PA to On Off Press the OK button after selection Use the Right Left button to select On Off then press OK Figure 5 24 SSPA On Off B4 O Temp nк Display the local ODU s current working temperature ...

Страница 38: ...est Item This item allows you to enter Loopback mode 9 System allows only one kind of loopback at a time except for PRBS test Enter Test Item Press OK Enter the password verification Enter the 6 digits system password Use SEL to change between different functions 9 P Position A Adjust Press OK ...

Страница 39: ...ility Use the Right Left button to select the T1 Tn tributary of the local E1 interface Press OK The Right Left button is also used for selecting En Dis En Enable Dis Disable This is used along with E1 transmission tester for E1 interface test 9 This function can not be used with its own PRBS function for testing For example 1 To set the tributary 1 of E1 to Local Loopback Enter TEST Item Tri Loc ...

Страница 40: ...t in LCD panel textmenu and SNMP software It means under condition of local loopback Local loopback could be activated by LCD panel You could cancel it in LCD panel textmenu and SNMP software It means under condition of remote loopback Remote loopback could be activated by LCD panel You could cancel it in LCD panel textmenu and SNMP software P It means one of local tributaries is under condition o...

Страница 41: ... mainly conducts tests for working condition of whole tributary You could choose external E1 tester or internal PRBS to verify condition Perform Remote Loopback in the remote end for the convenience of testing the link s stability Use the Right Left button to select the T1 Tn tributary of the remote E1 interface Press OK The Right Left button is also used for selecting En Dis En Enable Dis Disable...

Страница 42: ...d the testing equipments to test the stability Press OK Use the Right Left button to select Enable Disable Press OK On using this function the LCD will display the accumulated BER When Tributary 3 is in Remote Loopback TEST led is orange Open tributary 3 PRBS test Now will appear at the right bottom of the LCD Remote end s TEST led will turn orange too with T display on the front panel LCD Remote ...

Страница 43: ...produced and processed Until the 60 s the pseudo random noise came about and solve all these problems Pseudo random noise poses statistical property similar to random noise At the same time it can be repeatedly produced and processed easily It has increasingly been extensively use practically because it poses the advantages of random noise and none of its disadvantages In today s world it has been...

Страница 44: ...ormed the transmission between stations is interrupted There are 3 methods to verify the conditions a To verify thru external E1 tester b To verify thru real time BER display in LCD panel When it displays 0 00E 7 the system is working well c To verify thru internal PRBS function Perform IF Loopback at the IF interface for the convenience of testing the IDU s stability Press OK Use the Right Left b...

Страница 45: ...rmed the transmission between stations is interrupted There are 3 methods to verify the conditions a To verify thru external E1 tester b To verify thru real time BER display in LCD panel When it displays 0 00E 7 the system is working well c To verify thru internal PRBS function In RF Loopback appears at the right bottom of the LCD The local s and remote s TEST led gives an orange glows When the lo...

Страница 46: ...d Spectrum Radios 5 20 Figure 5 40 RF Loop En Dis C9 Close Test Press OK to close all tests Figure 5 41 Close Test 5 2 4 Remote Info Figure 5 42 Remote Info D1 Link ID n Display the ID of the current remote link n 1 255 ...

Страница 47: ...of the remote end equipments It is used as a function of signal monitor for the determination of its source OK active connection Alarm remote system alarm occurs Loss remote monitor loss Test remote system test activated Figure 5 44 Far End OK Alarm Loss Test D3 R AUX1 RS 232 RS 422 Display remote AUX1 working status ...

Страница 48: ... R AUX1 RS 232 RS 422 D4 R AUX2 ASY CH SYN CH Display remote AUX2 working status Figure 5 46 R AUX2 ASY CH SYN CH 5 2 5 IP Info E1 ETH IP Display ETH port IP address Figure 5 47 ETH IP 9 The default IP is 192 168 168 1 E2 ETH Mask Display ETH subnet mask ...

Страница 49: ...48 ETH Mask E3 NMS1 IP Display NMS1 port IP address Figure 5 49 NMS1 IP E4 NMS1 Peer IP Display peer NMS1 port IP address when more than two equipments are connected in the local station Figure 5 50 NMS1 Peer IP E5 NMS2 IP Display NMS2 port IP address ...

Страница 50: ...Display peer NMS2 port IP address when more than two equipments are connected in the local station Figure 5 52 NMS2 Peer IP E7 Link IP Display Link port IP address Link means RF connection between two stations Figure 5 53 Link IP E8 Link Peer IP Display peer Link port IP address ...

Страница 51: ...roduct F1 LAN Port Dis 1E1 2E1 3E1 4E1 Activate E1 interface number which should be used for Ethernet transmission Take following figure as example it setup 4E1 as Ethernet transmission Figure 5 56 LAN Port Dis 1E1 2E1 3E1 4E1 F2 Actual None 1E1 2E1 3E1 4E1 Display actual E1 interface number which has been transferred to Ethernet transmission ...

Страница 52: ...F3 Auto Nego None Dis En Activate close Ethernet auto negotiation function Figure 5 58 Auto Nego None Dis En F4 Duplex None Full Half The configuration of Ethernet interface duplex Figure 5 59 Duplex None Full Half F5 Speed None 10M 100M The configuration of Ethernet interface speed ...

Страница 53: ...S Test Start Testing Activate Self Test function Self Test status display After activating this function system will automatically perform IF Loopback RF Loopback and RMT Loopback tests and display test results in S Test Result menu 9 The test procedure explains as following the system would perform IF loopback test first and choose the first tributary to send PRBS If error number within 30 second...

Страница 54: ...continues to perform remote loopback test Before performing remote loopback test system would verify the condition between local and remote is normal If normal system would perform remote loopback PRBS tests for each tributary in turn If the error number is 0 then the tributary is viewed to pass the test If tributary doesn t pass the test it will show RMT LP NG Trib n which means tributary n doesn...

Страница 55: ... possibility to receive same frequency signal not belonging to the same link In this situation the signal should be viewed as interference For avoiding the situation the two stations of the same link should be set to be the same Link ID When local equipment receives signals system would compare Link ID If it is identical it means system is receiving correct signals If not it would cause Link ID al...

Страница 56: ...e E1 Spread Spectrum Radios 5 30 G2 MODEM ON OFF Display the status of external modem at the local end ON implies external modem is connected OFF implies external modem is not connected Figure 5 68 MODEM ON OFF ...

Страница 57: ... 100m RG 8 200m RF Cable Insertion Loss 1dB 6 2 Operating Temperature Range IDU 5к 55к ODU 30к 60к 6 3 DC Input Voltage DC Input Voltage 36 72VDC 6 4 Power Consumption Power Consumption 45W 6 5 Humidity Relative humidity as follows IDU 10и a 95и non condensed ODU 0и a 100и ODU equipment is water resistant ...

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