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INSTALLATION AND MAINTENANCE MANUAL 
E1 FAMILY  
LICENSED & SPREAD SPECTRUM RADIOS 
JUNE 2001 

 

 

SECTION 4: TROUBLESHOOTING 

PAGE 4-19 

4.8  Interference Countermeasures 

The recommended interference countermeasures available to the 

Lynx

 operator are as follows: 

1. 

Short Paths 

The single most effective countermeasure against interference is to maintain "short path" length. 
This may be achieved by dividing long paths into multiple small paths by cascading hops. 
Intermediate repeaters may be formed using back-to-back 

Lynx

 terminals and transmit output power 

reduced, if required. 

By definition, "short path" is defined as a path where fades are extremely rare and signal levels vary 
by no more than ±3 dB during fades. This distance will vary with the RF frequency. Typically a 
"short path" is defined as any path length shorter than 5 miles at 5.8 GHz or 7 miles at 2.4 GHz. 

2. 

Narrow Beam Antennas (high gain) 

This is the next most effective countermeasure. Narrow beam antennas ensure that the transmitted 
power is sent in a single direction and this minimizes the possibility of causing interference 
inadvertently to other users. Narrow beam antennas also reject off-azimuth signals being received 
from potential sources of interference and have high gain which boosts desired receive levels and 
improves the carrier to interference ratio. When selecting narrow beam antennas, it is helpful to 
know that larger antennas generally outperform smaller antennas. Another important antenna 
specification is the front-to-back ratio which ensures rejection of unwanted signals from azimuth 
angles behind the antenna. 

3. 

Frequency Selection

 

This is another very effective countermeasure. The 

Lynx

 radio offers several distinct non-overlapping 

frequency channel plans (see Sections 3.5 and 4.2) and the radio’s RF filter is able to reject 
interference more than 10 MHz away from the receive frequency. Offset frequencies combined with 
other countermeasures may enable several receive channels to operate at a single hub site. 
Because of the limited spreading ratio used, frequency selection is more efficient than code 
selection for interference rejection when operating multiple 

Lynx

 terminals at a single site. 

Interference can often be overcome by exchanging frequencies of both-ends of the radio link (e.g. 
change your A1 terminal to an A2 and change the other end from an A2 to an A1). Also, changing 
channel plans (e.g. from A to B) can be very effective. (See Section 4.2). 

Содержание Lynx 1xE1

Страница 1: ...INSTALLATION AND MAINTENANCE MANUAL LICENSED RADIOS 2xE1 and 4xE1 1 5 GHz SPREAD SPECTRUM RADIOS 1xE1 2xE1 4xE1 and 8xE1 2 4 AND 5 8 GHz MAN 31400 002...

Страница 2: ......

Страница 3: ...plex makes no warranty of any kind concerning this manual or any equipment supplied with this manual including but not limited to the implied warranties of merchantability and fitness for a particular...

Страница 4: ...ber 2000 Added the LYNX HD6 8xE1 March 2001 Added Lynx HD 4xE1 2 4 GHz Model 31350 20 30 Added Lynx HD 4xE1 5 8 GHz Model 31850 20 30 Added Lynx HD 8xE1 5 8 GHz Model 27705 20 June Added Safety Instru...

Страница 5: ...e equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the...

Страница 6: ...INSTALLATION AND MAINTENANCE MANUAL LYNX E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 iv This page intentionally left blank...

Страница 7: ...ex Western Multiplex shall either repair or replace the Returned item at its sole option The replacement item may be new or refurbished if refurbished it shall be equivalent in operation to new Equipm...

Страница 8: ...SAVINGS ANY CLAIM AGAINST A CUSTOMER BY A THIRD PARTY OR ANY OTHER COMMERCIAL OR ECONOMIC LOSSES OF ANY KIND 6 4 THESE LIMITATIONS AND DISCLAIMERS ARE NOT MADE BY WESTERN MULTIPLEX WHERE PROHIBITED B...

Страница 9: ...nication from the Customer that are not identical with the terms and conditions steed in this document shall NOT become a part of the agreement of sale unless expressly agreed to in writing in the Quo...

Страница 10: ...payment of the purchase price of the Equipment and all other amounts due from the Customer 6 2 If the Customer is not located in North America a despite delivery and passing of risk in the Equipment...

Страница 11: ...result of a failure of the Equipment to operate in conjunction with other manufacturer s equipment WARRANTY 14 1 All Equipment is covered by the Warranty 14 2 THE WARRANTY CONTAINS LlMITATIONS ON THE...

Страница 12: ...ern Multiplex may enforce the provisions of the Agreement in accordance with the laws of the jurisdiction in which the Equipment is situated The United Nations Convention on the Sale of Goods The Vien...

Страница 13: ...3 2 Test Points Power Indicator 2 15 2 3 3 Alarm and Status Indicators 2 16 2 3 4 Controls 2 17 2 3 5 Connections 2 18 2 4 REAR PANEL DESCRIPTION 2 19 2 4 1 RF Connection 2 21 2 4 2 DATA Connections...

Страница 14: ...78 3 14 3 Diagnostics Port Operation 3 80 3 14 3 1 Diagnostics Port using RS 232 3 81 3 14 3 2 Diagnostics Port using RS 422 3 82 3 14 3 3 TBOS Protocol and Map 3 83 3 14 4 AUX DATA Digital Service Ch...

Страница 15: ...L PLAN 2 4 GHZ 4XE1 3 40 FIGURE 3 4 CHANNEL PLAN 5 8 GHZ 1XE1 4XE1 3 40 FIGURE 3 5 CHANNEL PLAN 5 8 GHZ 2XE1 3 41 FIGURE 3 6 CHANNEL PLAN 5 8 GHZ 8XE1 3 41 FIGURE 3 7 NEGATIVE VOLTAGE DC CONNECTION 3...

Страница 16: ...C 2 ALARM PORT CONNECTIONS 5 12 FIGURE C 3 DIAGNOSTIC PORT 9 PIN D STYLE CONNECTOR 5 13 FIGURE C 4 AUX DATA PORT 9 PIN D STYLE CONNECTOR 5 13 Tables TABLE 3 A DC POWER CONNECTION FOR NEGATIVE SUPPLY...

Страница 17: ...effectively utilize the information in this manual Section 2 Provides a brief description and specifications of the Lynx Radio Modems Section 3 Explains the Lynx installation and adjustments in detail...

Страница 18: ...ation in accordance with Articles 110 18 110 26 and 110 27 of the United States National Electric Code ANSI NFPA 70 This equipment should be installed in accordance with Article 810 of the United Stat...

Страница 19: ...it is earthed properly as described in this manual and per Figure 1 1 Do not connect or disconnect the power cable to the equipment when the other end of the cable is connected to the dc power supply...

Страница 20: ...same source as other units ensure that the power supply circuit does not get overloaded When installed in a rack always ensure that proper air flow is provided for this product The maximum room ambien...

Страница 21: ...ional microwave Because each owner controls the operation of the link there is no reliance on any outside services Lynx radio operators are able to operate instant links whenever needed and to be in c...

Страница 22: ...utput Power typ 30 dBm 30 dBm 27 dBm 27 dBm Output Power min 27 dBm 27 dBm 24 dBm 24 dBm Control Range 16 dB min 16 dB min Frequency Range 2410 2473 MHz 2421 2462 5 MHz 1429 1515 5 1429 1515 5 occupie...

Страница 23: ...0 ohms 1 5 or 2 4 GHz 5 8 GHz Recommended 4 6 or 8 foot 2 4 6 or 8 foot Antenna not included parabolic parabolic 1 or 2 foot flat panel 1 or 2 foot flat panel Gain Beamwidth 3 dB 2 ft Parabolic Antenn...

Страница 24: ...d Spectrum models only 2 4 GHz 1 x E1 2 4 GHz 4 x E1 5 8 GHz 1 x E1 Threshold Rx Level 93 dBm 88 dBm 92 dBm BER 10 6 Frequency Range 2400 2400 5725 2483 5 MHz 2483 5 MHz 5850 MHz System Gain 123 dB 11...

Страница 25: ...0 dB 1 8m Antennas 174 dB 181 dB 184 dB 182 dB 2 4m Antennas 176 dB 181 dB 184 dB 182 dB Deduct 2 dB 4 dB or 6 dB for the 2xE1 4xE1 or 8xE1 models respectively Typical Link Distance 0 6m Antennas 1 2m...

Страница 26: ...Hz 5834 MHz 5820 MHz 2467 MHz C1 channel N A 5775 MHz N A 5775 MHz N A C2 channel N A 5840 MHz N A 5840 MHz N A 5 8 GHz 8xE1 HD 27705 20 A1 channel 5750 MHz A2 channel 5825 MHz Receive Frequencies 2 4...

Страница 27: ...1 channel 1443 0 MHz TBD MHz E2 channel 1508 5 MHz TBD MHz F1 channel 1446 5 MHz TBD MHz F2 channel 1512 0 MHz TBD MHz G1 channel 1450 0 MHz TBD MHz G2 channel 1515 5 MHz TBD MHz Receive Frequencies 1...

Страница 28: ...ced 120 ohm Pins 1 TT 2 TR 4 RT 5 RR optional 75 ohm unbalanced balun available Blue Code Alarm Indication Signal AIS Remote Loopback Internal or external test signal rear panel DIP switch selectable...

Страница 29: ...B DTMF tones within 1 5 of nominal freq Ringing Voltage 48 VDC typical use telephones with solid state ringers NOT adequate for older style mechanical ringers VF Orderwire Bridge 600 ohm balanced 4 w...

Страница 30: ...e T e m p e r a t u r e a n d E n v i r o n m e n t a n d E n v i r o n m e n t All Models Operating Temperature Range 30 to 65 C Humidity 95 non condensing Altitude 4 500 meters maximum 2 2 8 2 2 8 P...

Страница 31: ...7 Industry Canada ID 522 102 415A 202 810 21853A 2028 102 237 IC Rule Parts RSS 210 RSS210 RSS 210 ETSI ETS 300 328 826 ETS 300 328 826 5 8 GHz 2xE1 5 8 GHz 4xE1 5 8 GHz 8xE1 FCC Identifier HZB LYNX66...

Страница 32: ...ECTRUM RADIOS JUNE 2001 PAGE 2 12 SECTION 2 PRODUCT DESCRIPTION 2 2 1 0 2 2 1 0 M e c h a n i c a l M e c h a n i c a l All Models Width for 19 inch EIA 437 mm 17 2 rack mounting brackets supplied rac...

Страница 33: ...ed for installation maintenance operation and troubleshooting Prior to installation it is best to be familiar with the front panel of your particular model Sections 2 3 2 through 2 3 5 briefly describ...

Страница 34: ...M RADIOS JUNE 2001 PAGE 2 14 SECTION 2 PRODUCT DESCRIPTION Figure 2 Figure 2 4 Front Panel 5 8 GHz 8xE1 4 Front Panel 5 8 GHz 8xE1 Figure 2 Figure 2 5 Front Panel 1 5 GHz 2xE1 5 Front Panel 1 5 GHz 2x...

Страница 35: ...troubleshooting LOCAL TX PWR This is a test point which corresponds to the output transmit power of the radio A voltage can be measured with a voltmeter using the GND test point for reference which co...

Страница 36: ...active AIS Alarm Indication Signal is injected into the E1 line transmit output data port AIS OUT When lit RED this is a status condition indicating that the radio receiver is transmitting AIS Alarm I...

Страница 37: ...flashes while the far end is solid Loopback is disabled by pushing and releasing the ENABLE button at either the near end or far end radio Enabling loopback will interrupt traffic This is an out of s...

Страница 38: ...ress of the far end radio or any radio in the Lynx network to establish telephone communication between sites This communication does not interrupt or interfere with the other radio communications The...

Страница 39: ...sed for installation maintenance operation and trouble shooting Before installation you should familiarize yourself with the rear panel Figure 2 Figure 2 7 R e a r P a n e l 1 x E 1 7 R e a r P a n e...

Страница 40: ...ure 2 1 0 R e a r P a n e l 8 x E 1 b a l a n c e d R J 1 0 R e a r P a n e l 8 x E 1 b a l a n c e d R J 4 5 p o r t s o n l y 4 5 p o r t s o n l y Figure 2 Figure 2 1 1 R e a r P a n e l 1 5 G H z...

Страница 41: ...panel The N Type connector is used to connect the antenna typically using coaxial transmission line In some cases waveguide may be used as the primary transmission line in which case a waveguide to N...

Страница 42: ...1 connections These connections carry the individual E1 signals in and out of the radio The BNC data ports accept bipolar signals with the shield normally left open floating in order to eliminate grou...

Страница 43: ...ed to other transmission equipment for monitoring alarm status locally or remotely DIAG NOSTICS This is a serial interface port RS 232 or RS 422 9600 baud to the Lynx radio This port provides maintena...

Страница 44: ...esting when the operator is located at the terminal site and watching for errors see Section 3 13 3 AIS Disable This switch segment allows the user to select whether or not an AIS signal will be autom...

Страница 45: ...spreading code for the spread spectrum signal Both ends of a radio system must be set to the same code Users may wish to change codes for radios that are nearby other similar radios to aid in interfer...

Страница 46: ...g screws are provided which allow 19 inch rack mounting of the Lynx radio Terminal Connector This is a 6 pin mating connector used for DC power supply D Connector 9 pin Two of these mating connectors...

Страница 47: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 2 PRODUCT DESCRIPTION PAGE 2 27 Your Notes on the Lynx Radio...

Страница 48: ...vent that the equipment must be returned to the factory use the original packing materials for return shipment The original packaging materials are also recommended for transporting the equipment from...

Страница 49: ...DIOS JUNE 2001 SECTION 2 PRODUCT DESCRIPTION PAGE 3 29 3 2 Packing Items Identification The primary shipping container houses the radio and an additional box The box contains several related items ins...

Страница 50: ...e margin calculation Availability calculation Frequency plan determination Power supply planning Antenna and accessories purchase Only directional antennas should be used with Lynx radios These can be...

Страница 51: ...mission will not pass through trees or other obstacles Factors to consider include Earth curvature Future growth of trees Height of buildings In addition to the line of sight requirement a well engine...

Страница 52: ...by Lp dB 96 6 20 log10 F 20 log10 D where F Frequency in GHz 1 5 2 4 or 5 8 D Distance of path in miles This link budget is very important for determining any potential problems during installation If...

Страница 53: ...rovided in Section 3 3 3 the anticipated RSL can be calculated Compare this RSL to the specified threshold of the Lynx radios which is shown in Section 2 2 and calculate the fade margin as the differe...

Страница 54: ...4 GHz or 5 8 GHz in the case of the Lynx radios Terrain smooth average mountainous Climate dry temperate hot humid Depending on the type of traffic carried over the link the system designer may wish t...

Страница 55: ...used at the same site the same radio channel e g A1 and A1 should be used at a site to minimize interference Using alternate channels e g A1 and A2 is less likely to be successful and therefore not re...

Страница 56: ...battery reserves Typically either a positive or negative ground 24 or 48 volt supply is used For DC be sure the cable is of sufficient gauge to carry the necessary current and it is less than three 3...

Страница 57: ...e more costly to purchase and install than smaller antennas in some cases requiring special equipment for installation All of these factors should be taken into consideration when selecting antennas I...

Страница 58: ...wer Alarms The following tools are recommended for the installation of the Lynx radios RF power meter to measure transmitter output power Cellular phone or two way radio for talking with far end crew...

Страница 59: ...lows users to implement Lynx systems in the proximity of other Lynx radios planned or unplanned hub and repeater applications and can be used to mitigate interference The channel plans are illustrated...

Страница 60: ...ENTS Channel Pairs A1 TX 2410 RX 2451 A2 RX 2410 TX 2451 B1 TX 2424 RX 2465 B2 RX 2424 TX 2465 Figure 3 Figure 3 3 Channel Plan 2 4 GHz 4xE1 3 Channel Plan 2 4 GHz 4xE1 Figure 3 Figure 3 4 C h a n n e...

Страница 61: ...PTION PAGE 3 41 Figure 3 Figure 3 5 Channel Plan 5 8 GHz 2xE1 5 Channel Plan 5 8 GHz 2xE1 A1 A2 Channel Plan A1 A2 Tx 5750 MHz Rx 5750 MHz Rx 5825 MHz Tx 5825 MHz Figure 3 Figure 3 6 Channel Plan 5 8...

Страница 62: ...k mounting brackets enclosed with the screws in the Accessory Kit 4 per bracket The rack mounting brackets may be reversed in order to install for flush or cabinet mounting if preferred Depending on r...

Страница 63: ...see figure 3 7 3 Return DC 4 Return DC 5 Ground see figure 3 7 6 Power DC T a b l e 3 T a b l e 3 A D C P o w e r C o n n e c t i o n f o r N e g a t i v e S u p p l y A D C P o w e r C o n n e c t i...

Страница 64: ...ground return connection to pins 3 or 4 See Figure 3 7 If using positive power connect the positive voltage to pins 3 or 4 Connect the ground return connection to pins 1 or 6 See Figure 3 8 The groun...

Страница 65: ...i v e V o l t a g e D C C o n n e c t i o n 7 N e g a t i v e V o l t a g e D C C o n n e c t i o n Figure 3 Figure 3 8 P o s i t i v e V o l t a g e D C C o n n e c t i o n 8 P o s i t i v e V o l t...

Страница 66: ...AC power supply operates from any AC voltage 100V 250V and 50 Hz or 60 Hz The AC supply is equipped with a mating connector that plugs directly into the Lynx radio and an AC cord with a 3 pin AC plug...

Страница 67: ...rack should be as high as possible 20 dB minimum recommended The length of the antenna transmission line should be kept as short as possible to minimize losses For 5 8 GHz radios to minimize feeder l...

Страница 68: ...be grounded every 100 feet In areas of high incidence of lightning dissipaters should be attached to antennas In addition coaxial in line spark gap type lightning suppressors should be added at the bo...

Страница 69: ...ion and azimuth adjustment rods are then mounted onto the support brackets The whole structure must be adequately grounded for lightning protection The antenna system must always be installed accordin...

Страница 70: ...e convenient to run two wires from the RSL and ground test points to the antenna so that the voltmeter reading is directly visible to the technicians aligning the antenna Also a cellular telephone or...

Страница 71: ...SL to be peaked to the level calculated in the link budget If the RSL is peaked but is approximately 20 dB below the calculated level then it is likely that the antennas are aligned on a sidelobe of t...

Страница 72: ...dBm RSL Voltage Volts 25 0 350 60 0 625 30 0 359 65 0 675 35 0 383 70 0 725 40 0 429 75 0 778 45 0 479 80 0 825 50 0 525 85 0 858 55 0 575 90 0 875 Figure 3 Figure 3 1 0 B T y p i c a l R S L V o l t...

Страница 73: ...nal equipment If a balanced 120 ohm connection RJ45 is required when using Lynx 1xE1 or 2xE1 or Lynx 4xE1 with BNC ports then an optional balun will provide this interface If you can not locate these...

Страница 74: ...LYNX E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 PAGE 3 54 SECTION 3 INSTALLATION ADJUSTMENTS Figure 3 Figure 3 11 CEPT 11 CEPT 1 I n t e r f a c e G r o u n d i n g S w i t c h 1 I n t e r f...

Страница 75: ...is upside down Set the DIP switch settings for the label that is right side up If a new filter is installed or the existing filter is rotated for opposite channel configuration e g A1 to A2 reset the...

Страница 76: ...e internal or an external test signal The factory setting for loopback mode is internal On 1xE1 2xE1 and 4xE1 models SW1 position 3 and on the 8xE1 model SW 3 position 1 will select the loopback test...

Страница 77: ...el The spreading code must be the same for both ends of a radio link The spreading code can not be selected on the 4xE1 and 8xE1 Lynx 1 5 GHz and Lynx HD models Spreading codes are all set in the fact...

Страница 78: ...and remote alarms are not regularly generated by the known lack of this data input When the network is later expanded to include traffic on the second E1 this switch can be set to enable the input dat...

Страница 79: ...3 59 Ch1 SW4 1 Ch1 SW4 2 Ch1 SW4 3 Ch1 SW4 4 Ch1 SW4 5 Ch1 SW4 6 Ch1 SW4 7 Ch1 SW4 8 Input Alarm Disabled 1 1 1 1 1 1 1 1 Input Alarm Enabled 0 0 0 0 0 0 0 0 Figure 3 Figure 3 1 4 B I n p u t A l a r...

Страница 80: ...en the AIS is selected on the CEPT 1 signal will send blue code to the line when the r eceived BER exceeds 1 x 10 3 This function is similar to a data mute function When the AIS is disabled off no ins...

Страница 81: ...ifferent codes can be selected using the SW2 DIP switch segments 1 through 8 located on the Lynx HD 8xE1 rear panel The security code must be the same for both ends of a radio link The factory setting...

Страница 82: ...e can also be very useful for installation but typically cannot be put into service until step 8 or 9 of this procedure is completed See Section 3 14 1 for more details 2 Perform a general alignment o...

Страница 83: ...mitter in accordance with the path analysis calculations The recessed potentiometer is rotated clockwise to increase transmit output power and counter clockwise to decrease transmit output power After...

Страница 84: ...TMENTS Figure 3 Figure 3 1 6 T y p i c a l R F O u t p u t P o w e r 1 6 T y p i c a l R F O u t p u t P o w e r ve ve r s u s P W R V o l t a g e 1 5 2 4 G H z r s u s P W R V o l t a g e 1 5 2 4 G H...

Страница 85: ...Figure 3 Figure 3 1 7 T y p i c a l R F O u t p u t P o w e r 1 7 T y p i c a l R F O u t p u t P o w e r v e r s u s P W R V o l t a g e 5 8 G H z M o d e l s v e r s u s P W R V o l t a g e 5 8 G H...

Страница 86: ...he near end radio In other words RSL is the amount of signal the near end radio is receiving from the far end radio Since the antennas have not been finely aligned it is not expected at this time that...

Страница 87: ...typical causes of low RSL Radio operations can be verified by connecting radios back to back with attenuators 40 60 dB see Section 4 9 If the problem remains consult Section 4 of this manual for troub...

Страница 88: ...5 7 5 9 5 3 5 0 5 2 5 61 0 200 16 6 12 1 10 6 13 4 8 9 7 4 20 2 14 2 11 2 8 2 9 6 3 6 0 6 2 4 64 0 210 17 0 12 5 11 0 13 6 9 1 7 6 20 9 14 9 11 9 8 9 9 7 3 7 0 7 2 3 67 1 220 17 4 12 9 11 4 13 8 9 3...

Страница 89: ...61 0 200 M A X 29 3 28 4 27 6 26 3 25 4 64 0 210 M A X 29 6 28 8 27 8 26 5 25 7 67 1 220 M A X M A X 29 2 28 1 26 7 25 9 70 1 230 M A X M A X 29 6 28 3 27 0 26 1 73 2 240 M A X M A X M A X 28 5 27 2...

Страница 90: ...Thruline power meters do not operate at Lynx RF frequencies If adjusting the output power to meet an EIRP limit it will be first necessary to calculate the overall system gains and losses including fe...

Страница 91: ...around the far end radio press ENABLE and hold for approximately 3 seconds then release the Loopback ENABLE button on the front panel of the near end radio The ENABLE LED should now be blinking If th...

Страница 92: ...be initiated Section 4 10 describes BER testing in more detail Loopback may be turned off at either end of the link by simply pressing the ENABLE button at either end If two BER test sets are used to...

Страница 93: ...or rate In this mode the LED will flash on each time a single or multiple error occurs The LED turns off if no further errors occur This mode can be useful if a BER test set is not available and the u...

Страница 94: ...al type ringers This Orderwire service does not affect the normal radio transmission of E1 traffic Refer to Section 2 3 5 for the telephone specifications For simple near end to far end communications...

Страница 95: ...re telephone jack see Figure 3 19 for details 3 With a telephone connected to each Lynx terminal on opposite ends of the link either telephone can be used to dial up the far end location Simply pick u...

Страница 96: ...red to connect all radios to the orderwire The orderwire system can be integrated with orderwire equipment supported by many other vendors If your existing orderwire network uses 2 digit addressing an...

Страница 97: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 2 PRODUCT DESCRIPTION PAGE 3 77...

Страница 98: ...ms interface to a single standard TTL load When the unit is IN ALARM 0 the TTL output is 0 V to 0 5 V When the unit is NO ALARM 1 the TTL output is 3 5 V to 5 5 V See Table 3 E and Figure 3 21 for Ala...

Страница 99: ...ction for the out of service summary alarm relay PIN 8 AIS OUT in alarm when the BER exceeds 1 x 10 3 for the received signal or when there is an RX SYNC alarm condition Near end radio CEPT 1 line out...

Страница 100: ...ics port allows connection of either EIA standard RS 232 or RS 422 devices to poll and receive status of the Lynx radio This serial port provides similar information to that which is normally availabl...

Страница 101: ...stics connection to the Lynx radio connect the serial device modem computer terminal to the male 9 pin subminiature connector in accordance with Figure 3 23 Figure 3 Figure 3 23 RS 23 RS 2 3 2 D i a g...

Страница 102: ...nnect to the serial device modem computer terminal to the male 9 pin subminiature connector in accordance with Figure 3 24 Figure 3 Figure 3 24 RS 24 RS 4 2 2 D i a g n o s t i c P o r t C o n n e c t...

Страница 103: ...x radio sends to the TBOS terminal has a specific meaning with regard to status alarms or controls All TBOS network elements require a map for the network management software to interpret their respon...

Страница 104: ...Off Front panel switch where applicable 29 3 S C Loopback Channel 3 Enabled Loopback Channel 3 On Off Front panel switch where applicable 30 2 S C Loopback Channel 4 Enabled Loopback Channel 4 On Off...

Страница 105: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 2 PRODUCT DESCRIPTION PAGE 3 85...

Страница 106: ...s for this configuration There is a related DIP switch position as shown in Figure 3 27 that makes the AUX DATA port usable for customer data instead of the TBOS network management information The fac...

Страница 107: ...M a n a g e m e n t 2 6 R e p e a t e r A p p l i c a t i o n w i t h S i t e N e t w o r k M a n a g e m e n t Antenna Diagnostics Diagnostics 2 X E1 Lynx Antenna E1 Diagnostics E1 Aux DATA Aux DATA...

Страница 108: ...88 SECTION 3 INSTALLATION ADJUSTMENTS Figure 3 Figure 3 2 7 A U X D A T A C a b l e C o n n e c t i o n f o r R e p e a t e r 2 7 A U X D A T A C a b l e C o n n e c t i o n f o r R e p e a t e r Hub...

Страница 109: ...necting the antenna and E1 connections to the Protection Switch unit and then connecting the Protection Switch unit to two separate and identical Lynx or radios The Protection Switch unit provides the...

Страница 110: ...ication is typically configured as two separate radios at the same site connected to two separate antennas The separate antennas yield a slightly different path and therefore may provide better perfor...

Страница 111: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 2 PRODUCT DESCRIPTION PAGE 3 91 Your Notes on the Lynx Radio...

Страница 112: ......

Страница 113: ...monitor the radio link at regular intervals to assure that the link conditions are not changing When visiting a radio site for maintenance the following items may be checked and their results recorded...

Страница 114: ...ected to the antenna connector on the diplexer filter and then remove the two screws which mount the filter to the Lynx chassis 2 Slowly remove the filter from the chassis being careful to not endange...

Страница 115: ...any other radio in that same model type independent of frequency channel plan For example a 5 8 GHz E1 channel A2 can be used as a spare for any A B or C channel E1 radio at 5 8 GHz See Section 4 2 fo...

Страница 116: ...ers are encouraged to troubleshoot the radio and link in accordance with the latter part of this section in this manual before contacting Western Multiplex Western Multiplex also has a limited supply...

Страница 117: ...ce of returning the product You will be assigned a Return Material Authorization RMA number that authorizes your return Units sent to the factory without an RMA number may be delayed in the processing...

Страница 118: ...re are several front panel status LEDs on the Lynx radio These LEDs indicate conditions where either a hardware failure has occurred or the radio link is not optimum In many cases a combination of LED...

Страница 119: ...lure The capacity of the radio will determine how many DATA LOSS LEDs there are on the front panel Sometimes a double capacity radio is put into service with only one input channel active with the sec...

Страница 120: ...e the alarm condition can be disabled by a rear panel DIP switch as described in Section 3 12 4 4 Verify that the CEPT 1 line has data active at the radio connection This can be accomplished using a B...

Страница 121: ...at least 1 second for any group of errors which exceed the threshold whether they are a burst of errors or a long string of errors If the RX SYNC alarm is on the near end or far end radio in addition...

Страница 122: ...xpected RSL from the link budget calculations If RSL from both ends of the radio are approximately the same as each other but lower than anticipated for this installation then the likely cause of the...

Страница 123: ...external BER test should be performed to verify the extent of bit errors on the link See Sections 4 9 and 4 10 for details on bit error rate testing A BERT can be connected on one side of the link th...

Страница 124: ...e reading v Antenna problems misalignment or path clearance usually accompanied by Far End RX SYNC or BER alarm and low RSL voltage reading v Improper radio settings frequency channel spread code v In...

Страница 125: ...is not receiving data and is therefore injecting AIS to the line transmit out of the CEPT 1 connector If the AIS has been disabled by rear panel DIP switch AIS will not be injected onto the line trans...

Страница 126: ...unobstructed for airflow 3 Verify that at least one of the internal fans are operational by temporarily covering some of the ventilation holes on the right side of the radio as you face the front pan...

Страница 127: ...If RADIO FAIL alarm clears check CEPT 1 connections for proper pin connections and impedance as described in Section 3 11 3 If RADIO FAIL alarm does not clear remove power from the unit 4 Check to mak...

Страница 128: ...n the DISPLAY FAR END button is pressed and held the status LEDs indicate the alarm conditions of the far end radio Possible Cause v One or more alarm condition s exist on the far end radio Recommende...

Страница 129: ...If the BER LED is lit this indicates rather severe error conditions and it is best to follow the procedures provided in Section 4 6 1 However some errors will not result in the BER alarm such as bipo...

Страница 130: ...AINTENANCE MANUAL LYNX E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 PAGE 4 18 SECTION 4 TROUBLESHOOTING 2 Even if the BER alarm LED is unlit but errors continue follow the instructions describe...

Страница 131: ...eam antennas also reject off azimuth signals being received from potential sources of interference and have high gain which boosts desired receive levels and improves the carrier to interference ratio...

Страница 132: ...6 dB for radios using the same channel plan This is the difference between the co channel C I when using different codes for the wanted and unwanted signals When combined with a different frequency ch...

Страница 133: ...reduced by moving from the A1 A2 plan to the B1 B2 plan or by swapping terminals or RF filters so that A1 becomes A2 Signals outside the range of 2 4 GHz to 2 5 GHz for 2 4 GHz radios and 5 7 GHz to...

Страница 134: ...g any radio to the factory for repair When the equipment is connected as shown in Figure 4 1 without connecting the BER tester both Lynx radios should have no alarm conditions except for DATA LOSS Whe...

Страница 135: ...t C o n f i g u r a t i o n B a c k T e s t C o n f i g u r a t i o n When using a BER tester initiate loopback on connected Lynx and select external test mode as described in Section 3 12 2 The Lynx...

Страница 136: ...back testing using the DIP switches as defined in Section 3 12 Verify all DIP switch settings The BER test pattern chosen must contain adequate 1 s density A 215 1 QRSS or 3 in 24 test pattern may be...

Страница 137: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 4 TROUBLESHOOTING PAGE 4 25 Your Notes on the Lynx Radio...

Страница 138: ......

Страница 139: ...it Rate 2 048 Mb s Pulse Shape All marks of a valid signal must conform with the mask irrespective of the sign The value V corresponds to the nominal peak value Pair s in each Direction One Coaxial pa...

Страница 140: ...1 PAGE 5 2 SECTION 5 APPENDICES Figure A Figure A 1 M a s k o f t h e E 1 P u l s e C E P T 1 M a s k o f t h e E 1 P u l s e C E P T 1 1 219 10 10 10 10 10 10 269 244 25 194 ns 244 50 244 ns 20 488 n...

Страница 141: ...set for factory default configuration which is all switches down in the zero position except for SW3 positions 5 through 8 which are set to match the installed rear panel RF filter assembly which dete...

Страница 142: ...able Diagnostics Port 7 TBOS 0 Craft SNMP Proxy 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 1 CEPT 1 Ground Note 0 Floating Not used 1 Grounded on 2E 4E 1 2 3 4 5 6 7 8 SW...

Страница 143: ...le Diagnostics Port 7 TBOS 0 Craft SNMP Proxy 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 1 CEPT 1 Ground Note 0 Floating Not used 1 Grounded on 2E 4E 1 2 3 4 5 6 7 8 SW3...

Страница 144: ...nostics Port 7 TBOS 0 Craft SNMP 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 1 CEPT 1 Ground 0 Floating 1 Grounded 1 2 3 4 5 6 7 8 SW3 1 x x x 0 0 0 0 0 0 x x x 1 2 Spread...

Страница 145: ...e Flash 5 Rx AIS Output 0 Enable 1 Disable Diagnostics Port 7 TBOS 0 Craft 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 1 2 CEPT 1 Ground 0 0 Floating 1 1 Grounded 1 2 3 4...

Страница 146: ...ut 0 Enable 1 Disable Diagnostics Port 7 TBOS 0 Craft SNMP Proxy 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 1 2 3 4 CEPT 1 Ground 0 0 0 0 Floating 1 1 1 1 Grounded 1 2 3...

Страница 147: ...aft SNMP Proxy 1 Aux Data Port 8 Bridged TBOS 0 Enabled Clear 1 1 2 3 4 5 6 7 8 SW2 1 x x x x x x x x 0 x x x x x x x x 1 2 3 4 Not Used Not Used 5 6 7 8 1 2 3 4 5 6 7 8 SW3 1 x x x 0 0 0 0 0 0 x x x...

Страница 148: ...0 Enabled Clear 1 1 2 3 4 5 6 7 8 SW2 1 0 0 0 0 0 0 0 0 0 1 2 3 4 Link Security ID 0 0 0 0 1 1 1 1 Link Security ID 5 6 7 8 0 0 0 0 1 1 1 1 1 2 3 4 5 6 7 8 SW3 1 x x x 0 0 0 0 0 0 x x x 1 Loopback Tes...

Страница 149: ...bled Clear 1 1 2 3 4 SW2 1 0 0 0 0 0 2xE1 4xE1 4xE1 1 2 3 4 CEPT 1 Ground 0 0 0 0 Floating 1 1 1 1 Grounded 1 2 3 4 5 6 7 8 SW3 1 NotUsed x x x x 0 0 0 0 0 x x x x 1 Loopback Test Source 0 Internal 1...

Страница 150: ...ures illustrate the pin structure for all rear panel data connections All figures are oriented as a customer would view them facing the rear panel DC power connection information is found in Section 3...

Страница 151: ...3 D i a g n o s t i c P o r t 9 r t 9 Pin D Pin D S t y l e C o n n e c t o r S t y l e C o n n e c t o r Do NOT use both the RS 232 and RS 422 connections at the same time Figure C Figure C 4 AUX DA...

Страница 152: ...STALLATION AND MAINTENANCE MANUAL LYNX E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 PAGE 5 14 SECTION 5 APPENDICES Appendix E Installation and Troubleshooting Guide Insert foldout after this pa...

Страница 153: ...INSTALLATION AND MAINTENANCE MANUAL E1 FAMILY LICENSED SPREAD SPECTRUM RADIOS JUNE 2001 SECTION 5 APPENDICES PAGE 5 15 Your Notes on the Lynx Radio...

Страница 154: ...un 2 8 2 22 3 53 Bit error rate 3 70 Bit Error Rate 2 16 2 17 3 34 3 59 3 66 3 71 3 77 4 9 4 11 4 17 4 23 BNC 3 53 C Calculations 3 32 Caution 1 2 CEPT 1 2 22 3 53 5 1 5 2 CEPT 1 connection 3 66 3 70...

Страница 155: ...3 55 3 70 4 10 4 17 M Mechanical 2 12 MHS 3 86 Mounting 3 42 N Note 1 2 O Orderwire 2 9 2 23 2 25 3 61 3 66 3 73 3 74 3 75 Output power 3 63 3 64 Output power adjust 3 67 3 68 3 69 P Path 3 31 Path pl...

Страница 156: ...3 50 S SD Configuration 3 87 Shipping 2 26 3 28 Spares 4 3 Spreading code 3 56 Switches 4 2 Synchronization 4 12 System 2 5 2 6 2 7 T TBOS 2 23 2 24 2 25 3 73 3 78 3 81 3 82 3 83 3 84 Technical suppor...

Страница 157: ...For ISO Purposes Last Page of this Manual...

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