sds-sral
DESCRIPTION
sds sralTRANSCRIPT
SRA L
SYSTEM DATA SPECIFICATION
CODE: G97-SRAL-SDS-1.0.1
ISSUE/UPDATE: 2 - July 1997
SOURCE: BUSINESS UNIT RADIO - MARKETING & SALES
USE: CONFIDENTIAL
UPDATING: 1 YEAR
_____________________________________________________________________________© Copyright Italtel / Siemens
Title: Product Folder SRAL - System Data Specification Page 1/49
Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
INDEX
1. Available Configurations
2. Available Capacities
3. General
4. System Performances
5. Transceiver Section (ODU)
6. IDU Base-Band & Modem Characteristics
7. Auxiliary Channels
8. Protected Configuration Specification
9. IDU/ODU interconnecting cable
10. Integrated Antennas
11. Kit for hot stand-by configuration on one antenna (integrated solution)
12. Kit for ODU mounting separated from antenna
13. Power Supply
14. Power Consumption (guaranteed values)
15. Environmental Conditions
16. Mechanical Structure
17. EMC/EMI & Over-Voltage protection
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18. Mean Time Between Failure values
19. Operation & Management
Annex 1 - Antenna Data Characteristics
Figures
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1. Available configurations
SRA L radio equipment adopts a split solution consisting of two separated units, an Indoor Unit (IDU) and an Outdoor Unit (ODU) directly mounted on the rear of the antenna (ODU mounting separated from antenna is also possible).
The following configurations are available:A- single terminal (1+0)B- dual terminal 2x(1+0)C- (1+1) Hot Stand-By protected terminal (both on one and on two antennas)D- (1+1) Frequency Diversity protected terminal (on two antennas)1
E- Add/Drop RepeaterF- Through RepeaterG- Polarisation diversity (etero-frequency or iso-frequency)
Note: space diversity option is automatically obtained with (1+1) frequency diversity configuration or hot stand-by configuration on two antennas.
All the configurations above mentioned make use of the same structure as regards the Indoor Unit and the change of configuration is performed via software. Both protected configurations and dual terminal or repeater configurations are obtained doubling the Radio Transport Module card inside the indoor sub-rack.A single Outdoor Unit is adopted for configuration A, while two identical Outdoor Units are used for the configurations B, C, D, E, F and G.Configuration B can be activated only for 2x2 and 4x2 Mbit/s capacities.Configuration E allows up to 75% Add Drop capability for 4x2 Mbit/s and up to 50% Add/ Drop capability for 8x2 Mbit/s capacity.
1 If frequency diversity configuration on 1 antenna is requested, please contact the authors of this document_____________________________________________________________________________© Copyright Italtel / Siemens
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
2. Available capacities
The low capacity digital radio system SRA L is available in the following capacities: 2 Mbit/s 2/2x2 Mbit/s (software selectable) 2/2x2/4x2 Mbit/s (software selectable) 2/2x2/4x2/8x2 Mbit/s (software selectable)
Two different Radio Transport Module Cards can be used to obtain all these capacities:A. Radio Transport Module Card with 4x2 Mbit/s maximum capacity (Hardware limitation);B. Radio Transport Module Card with 8x2 Mbit/s maximum capacity (Hardware limitation);
Once chosen one of these 2 cards, the effective maximum capacity available to the customer is set by means of user fees, one for each capacity:
2 Mbit/s 2x2 Mbit/s up to 4x2 Mbit/s (software selectable) up to 8x2 Mbit/s (software selectable)
For instance a 4x2 Mbit/s user fee associated with a Radio Transport Module Card with 8x2 Mbit/s maximum capacity, allows the customer to set only one of the following capacities:
2 Mbit/s 2x2 Mbit/s 4x2 Mbit/s
To obtain an 8x2 Mbit/s capacity a new user fee must be requested to ITALTEL/SIEMENS.
Configuration B can be activated only for 2x2 and 4x2 capacities.Configuration E allows up to 75% Add Drop capability for 4x2 Mbit/s and up to 50% Add/ Drop capability for 8x2 Mbit/s capacity.
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3. General
3.1 Operating frequency bands(GHz)
7 GHz
7.1-7.4 GHz
Shifter (MHz)TX/RXSpacing
In fieldtunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)
161 35 Band 1=7124.5 7159.5 Band 1’=7285.5 7320.5
Band 2=7145.5 7180.5 Band 2’=7306.5 7341.5
Band 3=7166.5 7201.5 Band 3’=7327.5 7362.5
Band 4=7187.5 7222.5 Band 4’=7348.5 7383.5
Band 5=7208.5 7243.5 Band 5’=7369.5 7404.5
Band 6=7229.5 7264.5 Band 6’=7390.5 7425.5
161 35 Band 1’=7285.5 7320.5
Band 1=7124.5 7159.5
Band 2’=7306.5 7341.5
Band 2=7145.5 7180.5
Band 3’=7327.5 7362.5
Band 3=7166.5 7201.5
Band 4’=7348.5 7383.5
Band 4=7187.5 7222.5
Band 5’=7369.5 7404.5
Band 5=7208.5 7243.5
Band 6’=7390.5 7425.5
Band 6=7229.5 7264.5
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7 GHz
7.4-7.7 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)
154 35 Band 1=74287463Band 2=74497484Band 3=74707505Band 4=74917526Band 5=75127547Band 6=75337568
Band 1’=75827617Band 2’=76037638Band 3’=76247659Band 4’=76457680Band 5’=76667701Band 6’=76877722
154 35 Band 1’=75827617Band 2’=76037638Band 3’=76247659Band 4’=76457680Band 5’=76667701Band 6’=76877722
Band 1=74287463Band 2=74497484Band 3=74707505Band 4=74917526Band 5=75127547Band 6=75337568
161 35 Band 1=7424.57459.5
Band 2=7445.57480.5
Band 3=7466.57501.5
Band 4=7487.57522.5
Band 5=7508.57543.5
Band 6=7529.57564.5
Band 1’=7585.57620.5
Band 2’=7606.57641.5
Band 3’=7627.57662.5
Band 4’=7648.57683.5
Band 5’=7669.57704.5
Band 6’=7690.57725.5
161 35 Band 1’=7585.57620.5
Band 2’=7606.57641.5
Band 3’=7627.57662.5
Band 4’=7648.57683.5
Band 5’=7669.57704.5
Band 6’=7690.57725.5
Band 1=7424.57459.5
Band 2=7445.57480.5
Band 3=7466.57501.5
Band 4=7487.57522.5
Band 5=7508.57543.5
Band 6=7529.57564.5
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
7 GHz
7.4-7.9 GHz
Shifter (MHz)TX/RXSpacing
In fieldtunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)245 56 Band 1=7428 7484
Band 2=7470 7526
Band 3=7512 7568
Band 4=7554 7610
Band 5=7596 7652
Band 1’=7673 7729
Band 2’=7715 7771
Band 3’=7757 7813
Band 4’=7799 7855
Band 5’=7841 7897
245 56 Band 1’=7673 7729
Band 2’=7715 7771
Band 3’=7757 7813
Band 4’=7799 7855
Band 5’=7841 7897
Band 1=7428 7484
Band 2=7470 7526
Band 3=7512 7568
Band 4=7554 7610
Band 5=7596 7652
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
8 GHz
8.2-8.5 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)
126 28 Band 1= 8275.58303.5Band 2= 8289.58317.5Band 3=8303.58331.5Band 4= 8317.58345.5Band 5= 8331.58359.5Band 6= 8345.58373.5
Band 1’= 8401.58429.5Band 2’= 8415.58443.5Band 3’=8429.58457.5Band 4’= 8443.58471.5Band 5’= 8457.58485.5Band 6’= 8471.58499.5
126 28 Band 1’= 8401.58429.5
Band 2’= 8415.58443.5
Band 3’=8429.58457.5Band 4’=
8443.58471.5Band 5’=
8457.58485.5Band 6’=
8471.58499.5
Band 1= 8275.58303.5Band 2= 8289.58317.5Band 3=8303.58331.5Band 4= 8317.58345.5Band 5= 8331.58359.5Band 6= 8345.58373.5
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10.5 Ghz
10.5-10.7 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)91 28 Band 1=1049710525
Band 2=1051110539Band 3=1052510553Band 4=1053910567Band 5=1055310581Band 6=1056710595
Band 1’=1058810616Band 2’=1060210630Band 3’=1061610644Band 4’=1063010658Band 5’=1064410672Band 6’=1065810686
91 28 Band 1’=1058810616Band 2’=1060210630Band 3’=1061610644Band 4’=1063010658Band 5’=1064410672Band 6’=1065810686
Band 1=1049710525Band 2=1051110539Band 3=1052510553Band 4=1053910567Band 5=1055310581Band 6=1056710595
13 GHz
12.75-13.25 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)266 64 Band 1=1275012814
Band 2=1280712871Band 3=1286412928Band 4=1292112984
Band 1’=1301613080Band 2’=1307313137Band 3’=1313013194Band 4’=1318713250
266 64 Band 1’=1301613080Band 2’=1307313137Band 3’=1313013194Band 4’=1318713250
Band 1=1275012814Band 2=1280712871Band 3=1286412928Band 4=1292112984
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15 GHz
14.4-15.35 GHz
Shifter (MHz)TX/RX spacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)336 84 Band 1=1459514679
Band 2=1467214756Band 3=1474914833Band 4=1482614910
Band 1’=1493115015Band 2’=1500815092Band 3’=1508515169Band 4’=1516215246
336 84 Band 1’=1493115015Band 2’=1500815092Band 3’=1508515169Band 4’=1516215246
Band 1=1459514679Band 2=1467214756Band 3=1474914833Band 4=1482614910
420 115 Band 1=1450014615Band 2=1460814723Band 3=1471614831Band 4=1482414930
Band 1’=1492015035Band 2’=1502815143Band 3’=1513615251Band 4’=1524415350
420 115 Band 1’=1492015035Band 2’=1502815143Band 3’=1513615251Band 4’=1524415350
Band 1=1450014615Band 2=1460814723Band 3=1471614831Band 4=1482414930
490 119 Band 1=1440314522Band 2=1451514634Band 3=1462714746Band 4=1473914858
Band 1’=1489315012Band 2’=1500515124Band 3’=1511715236Band 4’=1522915348
490 119 Band 1’=1489315012Band 2’=1500515124Band 3’=1511715236Band 4’=1522915348
Band 1=1440314522Band 2=1451514634Band 3=1462714746Band 4=1473914858
644 120 Band 1=1450014620 Band 1’=1514415264
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644 120 Band 1’=1514415264 Band 1=1450014620
714 127 Band 1=14504-14631 Band 1’=15218-15345
714 127 Band 1’=15218-15345 Band 1=14504-14631
728 119 Band 1=1450114620 Band 1’=1522915348
728 119 Band 1’=1522915348 Band 1=1450114620
18 GHz
17.7-19.7 GHz
Shifter (MHz)TX/RX spacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)340 88 Band 1=1857518663
Band 2=1865618744Band 3=1873718825
Band 1=1891519003Band 2=1899619084Band 3=1907719165
340 88 Band 1’=1891519003Band 2’=1899619084Band 3’=1907719165
Band 1’=1857518663Band 2’=1865618744Band 3’=1873718825
1010 250 Band 1=1770017956Band 2=1794718202Band 3=1819518449Band 4 =1844218690
Band 1’=1871018966Band 2’=1895719212Band 3’=1920519459Band 4’=1945219700
1010 250 Band 1’=1871018966Band 2’=1895719212Band 3’=1920519459Band 4’=1945219700
Band 1=1770017956Band 2=1794718202Band 3=1819518449Band 4=1844218690
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23 GHz
21.2-23.6 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)1008 304 Band 1=2200022294
Band 2=2228722600Band 1=2300823302Band 2=2329523608
1008 304 Band 1’=2300823302Band 2’=2329523608
Band 1=2200022294Band 2=2228722600
1200 320 Band 1=2120021515Band 2=2149721809Band 3=2178022102Band 4=2207422404
Band 1’=2240022715Band 2’=2269723009Band 3’=2298023302Band 4’=2327423600
1200 320 Band 1’=2240022715Band 2’=2269723009Band 3’=2298023302Band 4’=2327423600
Band 1=2120021515Band 2=2149721809Band 3=2178022102Band 4=2207422404
1232 300 Band 1=2120021494Band 2=2148721781Band 3=2177422082Band 4=2207522369
Band 1’=2243222726Band 2’=2271923013Band 3’=2300623314Band 4’=2330723601
1232 300 Band 1’=2243222726Band 2’=2271923013Band 3’=2300623314Band 4’=2330723601
Band 1=2120021494Band 2=2148721781Band 3=2177422082Band 4=2207522369
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26 GHz
24.5-26.5 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)1008 310 Band 1=2454924857
Band 2=24843-25144Band 3=2513025445
Band 1’=2555725865Band 2’=2585126152Band 3’=2613826453
1008 310 Band 1’=2555725865Band 2’=2585126152Band 3’=2613826453
Band 1=2454924857Band 2=24843-25144Band 3=2513025445
38 GHz
37-39.5 GHz
Shifter (MHz)TX/RXSpacing
In field tunability
range(MHz)
ODU operation Bands TX
(MHz)
ODU operation Bands RX
(MHz)1260 380 Band 1=3705837438
Band 2=3743137811Band 3=3780438178
Band 1’=3831838698Band 2’=3869139071Band 3’=3906439438
1260 380 Band 1’=3831838698Band 2’=3869139071Band 3’=3906439438
Band 1=3705837438Band 2=3743137811Band 3=3780438178
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3.2 Tuning step size 250 kHz
3.3 RF channel arrangement
The TX and RX operating RF channels (RF frequencies) are chosen via software; two different modes are possible:
1. Continue frequency mode. It allows to set for the TX and RX operating frequency any value ranging within the
ODU operation bands, as previously reported, in accordance with the tuning step size.Only RF channels multiple of 250 kHz are possible.
2. Frequency plan. It allows to set a channel arrangement plan ranging within the ODU operation bands and
to choose among the pre-set channels for TX and RX.The minimum spacing between two adjacent channels available via software is:
2/2X2 Mbit/s 3.5 MHz4X2 Mbit/s 7 MHz8X2 Mbit/s 14 MHz (13.75 MHz available on request)
Only RF channels multiple of 250 kHz are possible.
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For reference the following ITU-R/CEPT channel arrangements are available:
RF BandsGHz
Operating limitsGHz
TX/RX Spacing (MHz)
ITU-R Recommendations
CEPT Recommendations
7 7.1-7.4 161 3857.4-7.7 161 385 7.4-7.7 154 385 Annex 17.4-7.9 245 385 Annex 4
8 8.2-8.5 126 386 Annex 310 10.5-10.7 91 747 Annex 113 12.75-13.25 266 49715 14.5-15.35 420 636
14.4-15.35 490 63618 17.7-19.7 1010 59523 21.2-23.6 1200/1232 637
22.0-23.6 1008 637 T/R 13-02E26 24.5-26.5 1008 748 T/R 13-02E38 37.0-39.5 1260 749 T/R 12-01
3.4 Minimum co-polar RF channel spacing
2/2x2 Mbit/s 3.5 MHz4x2 Mbit/s 7 MHz8x2 Mbit/s 14 MHz (13.75 MHz available on
request)
3.5 RF local oscillator type
It includes three main blocks: Dual UHF synthesiser TX V.C.O., locked to the Dual UHF
synthesiser RX V.C.O., locked to the Dual UHF
synthesiser
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3.6 Modulation Type CPM
3.7 Demodulation differential with Viterbi decoding
3.8 Inter-changeability Any Indoor Unit can be connected to any Outdoor Unit (Indoor and Outdoor Units are separately tested)
3.9 Intermediate frequencies (aggregate signal) on IDU/ODU interconnecting cable
transmission side 320 MHzreceiving side 70 MHz
3.10 Equipment traffic capacity
Payload 2 Mbit/s2x2 Mbit/s4x2 Mbit/s8x2 Mbit/s
The minimum 2 Mbit/s capacity is available with 2x2 Mbit/s capacity, using only half of it.
Digital service channels:
1. Voice (EOW) selective calling2. User free digital data channel 64 kbit/s on V.11 interface3. NMS channel (not available to user) 64 kbit/s
3.11 Base-band Interfaces 2 Mbit/s ITU-T G.703
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4 System performances2
The following data are referred to standard reference points, as per ETSI (see Fig. 4.1).
4.1 Reference ETSI Recommendations
SRA L is in accordance with the following ETSI Recommendations:
ETS 300 386ETS 300 339ETS 300 385ETS 300 132-2ETS 300 019prETS 300 833 Draft of February 1997DE/TM 04044 - class1 Draft of May 1997 (7, 8, 10.5 GHz)DE/TM 04039 - class1 Draft of May 1997 (13, 15, 18 GHz)DE/TM 04003 (Amendment to ETS 300 198) Draft of November 1996 (23 GHz
class 2 - grade BETS 300 431 - grade B (26 GHz)DE/TM 04001 (Amendment to ETS 300 197) Draft of November 1996 (38 GHz)
class 2 - grade B
2 All these data are measured at point B’C’/BCFurthermore C’D’/CD unless an hot stand-by configuration on a single antenna or a non-integrated antenna solution is adopted; in this case the loss due to the RF coupler and/or waweguide is to be taken into account._____________________________________________________________________________© Copyright Italtel / Siemens
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4.2 Guaranteed and Typical Values
7/8 GHz
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 22 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 24 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -89 -86 -83(point C) BER 10 E-6
Typical Threshold(dBm) -90.5 87.5 -84.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -91 -88 -85(point C) BER 10 E-3
Typical Threshold(dBm) -92.5 -89.5 -86.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 111 108 105(point C’/C) BER 10 E-6
Typical System Gain (dB) 114.5 111.5 108.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 113 110 107(point C’/C) BER 10 E-3
Typical System Gain (dB) 116.5 113.5 110.5(point C’/C; T=25C) BER 10 E-3
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10.5/13GHz
Capacity(Mb/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 18 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 20 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -89 -86 -83(point C) BER 10 E-6
Typical Threshold(dBm) -90.5 87.5 -84.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -91 -88 -85(point C) BER 10 E-3
Typical Threshold(dBm) -92.5 -89.5 -86.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 107 104 101(point C’/C) BER 10 E-6
Typical System Gain (dB) 110.5 107.5 104.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 109 106 103(point C’/C) BER 10 E-3
Typical System Gain (dB) 112.5 109.5 106.5(point C’/C; T=25C) BER 10 E-3
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15 GHz
Capacity (Mbit/s) 2x2 4x2 8x2
Guaranteed TX Output Power (dBm) 18 for each capacity(at maximum setting) (point C’; )
Typical TX Output Power (dBm) 20 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -88.5 -85.5 -82.5(point C) BER 10 E-6
Typical Threshold(dBm) -90 87 -84(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -90.5 -87.5 -84.5(point C) BER 10 E-3
Typical Threshold(dBm) -92 -89 -86(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 106.5 103.5 100.5(point C’/C) BER 10 E-6
Typical System Gain (dB) 110 107 104(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 108.5 105.5 102.5(point C’/C) BER 10 E-3
Typical System Gain (dB) 112 109 106(point C’/C; T=25C) BER 10 E-3
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18 GHz
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 16 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 18 for each capacity(at maximum setting)(point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -88 -85 -82(point C) BER 10 E-6
Typical Threshold(dBm) -89.5 -86.5 -83.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -90 -87 -84(point C) BER 10 E-3
Typical Threshold(dBm) -91.5 -88.5 -85.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 104 101 98(point C’/C) BER 10 E-6
Typical System Gain (dB) 107.5 104.5 101.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 106 103 100(point C’/C) BER 10 E-3
Typical System Gain (dB) 109.5 106.5 103.5(point C’/C; T=25C) BER 10 E-3
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23 GHz
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 16 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 18 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -87.5 -84.5 -81.5(point C) BER 10 E-6
Typical Threshold(dBm) -89 -86 -83(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -89.5 -86.5 -83.5(point C) BER 10 E-3
Typical Threshold(dBm) -91 -88 -85(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 103.5 100.5 97.5(point C’/C) BER 10 E-6
Typical System Gain (dB) 107 104 101(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 105.5 102.5 99.5(point C’/C) BER 10 E-3
Typical System Gain (dB) 109 106 103(point C’/C; T=25C) BER 10 E-3
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26 GHz
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 16 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 18 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -87 -84 -81(point C) BER 10 E-6
Typical Threshold(dBm) -88.5 -85.5 -82.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -89 -86 -83(point C) BER 10 E-3
Typical Threshold(dBm) -90.5 -87.5 -84.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 103 100 97(point C’/C) BER 10 E-6
Typical System Gain (dB) 106.5 103.5 100.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 105 102 99(point C’/C) BER 10 E-3
Typical System Gain (dB) 108.5 105.5 102.5(point C’/C; T=25C) BER 10 E-3
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38 GHz (for delivery until 12/97)
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 14 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 16 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -82 -79 -76(point C) BER 10 E-6
Typical Threshold(dBm) -83.5 -80.5 -77.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -84 -81 -78(point C) BER 10 E-3
Typical Threshold(dBm) -85.5 -82.5 -79.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 96 93 90(point C’/C) BER 10 E-6
Typical System Gain (dB) 99.5 96.5 93.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 98 95 92(point C’/C) BER 10 E-3
Typical System Gain (dB) 101.5 98.5 95.5(point C’/C; T=25C) BER 10 E-3
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38 GHz (for delivery after 12/97)
Capacity(Mbit/s) 2X2 4X2 8X2
Guaranteed TX Output Power (dBm) 15 for each capacity(at maximum setting) (point C’)
Typical TX Output Power (dBm) 17 for each capacity(at maximum setting) (point C’; T=25C)
Ptx Bandwidth and Temperature 2 2 2Stability (dB)
Guaranteed Threshold(dBm) -84 -81 -78(point C) BER 10 E-6
Typical Threshold(dBm) -85.5 -82.5 -79.5(point C; T=25C) BER 10 E-6
Guaranteed Threshold(dBm) -86 -83 -80(point C) BER 10 E-3
Typical Threshold(dBm) -87.5 -84.5 -81.5(point C; T=25C) BER 10 E-3
Guaranteed System Gain (dB) 99 96 93(point C’/C) BER 10 E-6
Typical System Gain (dB) 102.5 99.5 96.5(point C’/C; T=25C) BER 10 E-6
Guaranteed System Gain (dB) 101 98 95(point C’/C) BER 10 E-3
Typical System Gain (dB) 104.5 101.5 98.5(point C’/C; T=25C) BER 10 E-3
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4.2 TX Output Power Attenuation Range 24 dB from 7 up to 23 GHz 20 dB from 26 up to 38 GHz(In hot stand-by this range can be slightly reduced depending on the frequency band)
4.3 Minimum TX Output Power Attenuation Step 1 dB
4.4 TX Output Power Attenuation Accuracy It follows a linear law, yielding an attenuation accuracy from 0 dB at the maximum output power value, to ±2 dB at the maximum available attenuation.
4.5 Maximum RF input level (BER 10-10) -20 dBm
for no damage -10 dBm
4.6 Equipment background BER better than 10-11
4.7 Sensitivity to co-channel interference (CCI)
The limits of the co-channel interference sensitivity are such that the guaranteed threshold levels at BER 10-6, in presence of a single like interference signal giving maximum C/I values of 23 dB and 19 dB are as given in the following table (measurement point is B):
CAPACITY(Mbit/s) 2x2 4x2 8x2C/I values (dB) 23 19 23 19 23 19
7, 8, 10.5, 13 GHz BER10-6 degraded
threshold -88.65 -87.85 -85.65 -84.85 -82.65 -81.8515 GHz BER10-6
degraded threshold -88.15 -87.35 -85.15 -84.35 -82.15 -81.3518 GHz BER10-6
degraded threshold -87.65 -86.85 -84.65 -83.85 -81.65 -80.8523 GHz BER10-6
degraded threshold -87.15 -86.35 -84.15 -83.35 -81.15 -80.3526 GHz BER10-6
degraded threshold -86.65 -85.85 -83.65 -82.85 -80.65 -79.8538 GHz BER10-6
degraded threshold(version available
until 12/97)
-81.65 -80.85 -78.65 -77.85 -75.65 -74.85
38 GHz BER10-6
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degraded threshold(version available
after 12/97)-83.65 -82.85 -80.65 -79.85 -77.65 -76.85
4.8 Sensitivity to adjacent-channel interference (ACI)
The limits of the adjacent-channel interference sensitivity are such that the threshold levels at BER 10-6, in presence of a single like interference signal giving maximum C/I values of 0 dB and -4 dB are as given in the following table (measurement point is B):
CAPACITY(Mbit/s) 2x2 4x2 8x2C/I values (dB) 0 -4 0 -4 0 -4
7, 8, 10.5, 13 GHz BER10-6 degraded
threshold -88.1 -85 -85.1 -82 -82.1 -7915 GHz BER10-6
degraded threshold -87.6 -84.5 -84.6 -81.5 -81.6 -78.518 GHz BER10-6
degraded threshold -87.1 -84 -84.1 -81 -81.1 -7823 GHz BER10-6
degraded threshold -86.6 -83.5 -83.6 -80.5 -80.6 -77.526 GHz BER10-6
degraded threshold -86.1 -83 -83.1 -80 -80.1 -7738 GHz BER10-6
degraded threshold(version available
until 12/97)
-81.1 -78 -78.1 -75 -75.1 -72
38 GHz BER10-6
degraded threshold(version available
after 12/97)
-83.1 -80 -80.1 -77 -77.1 -74
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5. Transceiver section (ODU)
5.1 Transmitter
5.1.1 RF Output Power Mask
In accordance with the following ETSI Recommendations:
DE/TM 04044 - class 1 Draft of May 1997 (7, 8, 10.5 GHz)
DE/TM 04039 - class 1 Draft of May 1997 (13, 15, 18 GHz)
DE/TM 04003 - class 2 grade B (Amendment to ETS 300 198)Draft of November 1996 (23 GHz)
ETS 300 431 grade B (26 GHz)
DE/TM 04001 class 2 grade B (Amendment to ETS 300 197)Draft of November 1996 (38 GHz)
Please, refer to Fig.5.1 for masks
5.1.1 Emitted Spectrum (Typical)
Please, refer to Fig.5.2 (not available in SW format yet, but just in hard copy)
5.1.2 RF Stability 3 ppm
5.1.3 Occupied Bandwidth (99%)2/2x2 Mbit/s 4.225 MHz4x2 Mbit/s 8.45 MHz8x2 Mbit/s 16.9 MHz
5.1.4 Spectral efficiency2/2x2 Mbit/s 1.15 bit/s/Hz4x2 Mbit/s 1.15 bit/s/Hz8x2 Mbit/s 1.15 bit/s/Hz
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5.1.5 Occupied Bandwidth (99.5%)2/2x2 Mbit/s 4.552 MHz4x2 Mbit/s 9.104 MHz8x2 Mbit/s 18.208 MHz
5.1.6 Spurious Emissions
In accordance with the following ETSI Recommendations:
DE/TM 04044 - class 1 Draft of May 1997 (7, 8, 10.5 GHz)
DE/TM 04039 - class 1 Draft of May 1997 (13, 15, 18 GHz)
DE/TM 04003 - class 2 grade B (Amendment to ETS 300 198)Draft of November 1996 (23 GHz)
ETS 300 431 grade B (26 GHz)
DE/TM 04001 class 2 grade B (Amendment to ETS 300 197)Draft of November 1996 (38 GHz)
InternalFrequency (GHz) External TX
half bandRX
half band
7, 8, 10.5 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
-50 dBm -70 dBm
13, 15, 18, 23 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
no requirement -70 dBm
26 -60 dBm,
30 MHz f 21.2 GHz
-30 dBm, f 21.2 GHz
no requirement
38 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
no requirement
5.2 Receiver
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5.2.1 Type dual conversion 1st IF 1310 MHz 2nd IF 70 MHz
5.2.2 Spurious Emission
In accordance with the following ETSI Recommendations:
DE/TM 04044 - class 1 Draft of May 1997 (7, 8, 10.5 GHz)
DE/TM 04039 - class 1 Draft of May 1997 (13, 15, 18 GHz)
DE/TM 04003 - class 2 grade B (Amendment to ETS 300 198)Draft of November 1996 (23 GHz)
ETS 300 431 grade B (26 GHz)
DE/TM 04001 class 2 grade B (Amendment to ETS 300 197)Draft of November 1996 (38 GHz)
Frequency (GHz) External InternalRX half band
7, 8, 10.5 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
-90 dBm
13, 15, 18, 23 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
-70 dBm
26 -60 dBm,
30 MHz f 21.2 GHz
-30 dBm, f 21.2 GHz
no requirement
38 -50 dBm,
9 kHz f 21.2 GHz
-30 dBm, f 21.2 GHz
no requirement
5.2.3 RX Image Rejection 90 dB
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5.3 Return loss (Typical value) 15 dB
6. IDU Base-band & Modem characteristics
6.1 Tributary Interface at 2 Mbit/s
ITU-T Reference Rec. G.703 Bit Rate 2.048 Mbit/s
Return Loss at Input Port: 51 to 102 kHz 18 dB 102 to 2048 kHz 24 dB 2048 to 3072 20 dB
6.2 Jitter Characteristics
Input Jitter Tolerance As per ITU-T G. 823 (Fig. 3/Table 2)
Maximum Output Jitter As per ITU-T G. 823 (Fig. at 2 Mbit/s interface 1/Table 1)
Jitter Gain in accordance with ITU-T G.823/G.735/G.742/G.921.Refer to Fig. 6.1
Maximum Output Jitter in absence of input Jitter In accordance with ITU-T G.823/G.921
6.3 Scrambling Synchronous scrambler
Digital signals are scrambled to ensure the radiated RF spectrum does not contain discrete spectral components as a result of repetitive pattern in the input data stream or carrying internally generated AIS.The scrambler /descrambler adopted consists of a 212-1 stream which is seeded at the beginning of each frame.
6.4 Composite bit rate
Capacity (Mbit/s) 2X2 4X2 8X2
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Bit rate (kbit/s) 4096 8192 16384Aggregate bit rate (kbit/s) 4864 9728 19456
6.5 AIS Insertion criteria and delay
TX side criteriaA. 2 Mbit/s tributary input loss of signal
(LOS) (at 2 Mbit/s level)B. 2 Mbit/s tributary TX elastic memory
overflow (at 2 Mbit/s level)C. Execution of local loop (at 2 Mbit/s level)
RX side criteriaA. BER 10-3 revealed in the aggregate
radio frame (aggregate signal)B. Link ID code wrong (aggregate signal)C. Hardware high alarms revealed in the RX
chain (aggregate signal)D. 2 Mbit/s Tributary RX elastic memory
overflow (at 2 Mbit/s level)E. Execution of remote loop (at 2 Mbit/s
level)F. Hitless switch alignment loss (aggregate
signal)G. Not used 2 Mbit/s signals (at 2 Mbit/s
level)
Delay Less than 10 ms for each of the previously mentioned conditions (owing to the AIS hardware management)
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7. Auxiliary channels
Number 3
7.1 Type of service channel
1. EOW (optional)2. User free digital data channel3. Network Management System channel (used as TMN channel, not for other purposes)
7.1.1 EOW (Engineering Order Wire)
Type selective calling (DTMF) Connection type 6-wires (4 wires speech + E&M signalling) or 4 wires with DTMF
Signalling DTMF / E & M
7.1.2 User-free digital data channel
Type digital data channel Mode Synchronous, software
selectable as directional or contra-directional (master)
Electrical interfaceV.11, software selectable as directional or
contra-directional (master) Capacity 64 kbit/s
7.1.3 NMS channel
Used to transfer TMN messages carrying status information, alarms, commands through the network, towards the Gateway Network Element (GNE) on a TCP/IP protocol
NMS channel is accessible through three different interfaces:
1. PC channel interface Type digital data channel Mode asynchronous Interface RS 232C Speed 19.2 Kbit/s Protocol TCP/IP
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2. Q-Adapter channel interface (available only with Q-Adapter card)
Q channel is available with two different electrical-level interfaces:
a) ETHERNET type interface Electrical lines level 10 BASE 2, IEEE 802-3 Protocol Qx
b) X.21 type interface Electrical lines level X.21 Protocol Qx
3. Double V.11 interface for NMS channel interface Type digital data channel Mode synchronous contra-
directional (slave) Electrical interfaceV.11
synchronous contra-directional (slave)
Speed/capacity 64 kbit/s Number of interfaces 2 Protocol TCP/IP
This option expansion is only available with the double V.11 interface card in alternative to the Q-Adapter one.
Furthermore for the connection among different SRA L IDU located in the same station, the following interface is available:
NMS channel expansion
Type digital data channel Mode asynchronous Electrical interfaceRS 485 bus
structured type (proprietary) Speed/capacity 128 kbit/s Protocol TCP/IP
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8. Protected configuration specifications
8.1 Available protected configurations
The following protected configurations are available:
Hot stand-by
Frequency diversity (including polarisation diversity - etero/iso frequency))
Furthermore space diversity improvement can be obtained by using a 2 antenna mechanical structure.Fig. 8.1 shows the SRAL system protection general diagram.
A hitless switch in the RX section allows, under certain conditions an error-free protection.
Protection architecture is depicted in the following drawings:
Fig. 8.2 TX protection in hot stand-by configurationFig. 8.3 TX protection in frequency diversity configurationFig. 8.4 RX protection
In frequency diversity protected configuration the TX switch commands are used to transmit the same aggregate signal on both RF TX sections. This switch is not used in (1+1) hot stand-by configuration.The RF switch is only used in hot stand-by configuration.
The SRA L protected configuration guarantee the continuity of the connection between the two radio terminals when the following conditions occur:
Hardware failuresLink quality degradation
Error-free protection against multipath fading or link quality degradation is obtained by means of the error free hitless switch in the radio transport modules. The error free switching is obtained through “early warning” BER degradation thresholds (High BER and Low BER) extracted from the number of correction performed by the FEC logic and circuitry. This procedure gives the opportunity to measure the degradation of the BER in air due to the propagation conditions, also when the BER at 2 Mbit/s level is still at the background BER value.
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8.2 Switching logic
Two different logics operate in the SRA L equipment:
8.2.1 Hardware logic controlling: TX HW switch for frequency diversity. TX RF switch for hot stand-by RX HW switch
Hardware Logic Alarms causing switch commands
Alarm Priority
Manual forcing via software 1Gate Array # 1 Failure 2Gate Array # 2 Failure 2Radio Transport Module Card Failure 2Radio Transport Module card Power Supply Failure 2Radio Transport Module card missing 2
TX ODU failure: 2 IDU/ODU telemetry channel loss of
frame IDU/ODU telemetry channel loss of
signal ODU slave controller alarm ODU power supply alarm TX L.O. alarm IF aggregate signal loss Low output power level alarm
Modulator failure 2TX Gate Array 1 Failure 2TX Gate Array 2 Failure 2TX tributary overflow G. A. 1 2TX tributary overflow G. A. 2 2TX tributary L.O.S. G. A. 1 2TX tributary L.O.S. G. A. 2 2Link ID mismatching 2
8.2.2 Hitless switch logic controlling: RX hitless switch
Logic Alarms causing switch command:
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Alarm Priority
Manual forcing via switch 1Manual forcing via software 2
Failure AlarmsRX ODU Failure: 3
IDU/ODU telemetry channel loss of frame
IDU/ODU telemetry channel loss of signal
ODU power supply alarm RX L.O. alarm IF synthesiser alarm RX failure
Demodulator Failure 3Loss of frame 3
High Level Early Warning Alarm (EWA_H)3 4Low Level Early Warning Alarm (EWA_L) 5
8.3 Operating Mode
Switch Mode
RX Hitless switch unrevertive
Hardware logic switches revertive in hot-stand-by configuration
unrevertive in frequency diversity configuration
3 Early Warning Alarm ThresholdsBER in the aggregate before FECBER in the 2 Mbit/s stream after
FECEWA_High11.2x10E-35x10E-710E-6EWA_Low13x10E-6 10E-11
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8.4 Alarm detection time
Failure Alarm 10 ms
8.5 Operational switching time
TX Hardware switch for F. D. 1 ms RX Hardware switch 1 ms TX RF switch for hot stand-by 50 ms Hitless switch negligible
8.6 RX total recovery time (failures) 100 ms
9. IDU/ODU interconnecting cable
9.1 Number of cables
One cable to connect each Radio Transport Module card to the relevant Outdoor Unit
Two types of cables are available, in alternative to each other:
Andrew cable: CF 1/ 4” LDF1RV - 50 coaxial cable Kabelmetall cable: CF 1/ 4” Cu2Y - 50 coaxial cable
9.2 Maximum cable length 400 m
A different coaxial cable can be furnished by ITALTEL, when the distance between IDU and ODU ranges from 400 to 500 m.
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10. Integrated Antennas
10.1 Antenna diameters
10.5 GHz 0.6 m
13 GHz 0.3 m 0.6 m
15 GHz 0.3 m 0.6 m
18 GHz 0.3 m 0.6 m
23 GHz 0.3 m 0.6 m
26 GHz 0.3 m
38 GHz 0.3 m
For more details, please refer to Annex 1, Reg. 2-10.
In accordance with ETSI Recommendation prETS 300 833, Draft of February 1997.
11. Kit for Hot stand-by configuration on 1 antenna (integrated solution)
11.1 Additional loss (dB) (Guaranteed Values):
7/8 GHz
Main path 0.7Stand-by 101
10.5 GHz
Main path 0.95Stand-by 101
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13 GHz
Main path 1.25Stand-by 101.5
15 GHz
Main path 1.35Stand-by 101.2
18 GHz
Main path 1.8Stand-by 151
23 GHz
Main path 1.8Stand-by 151
26 GHz
Main path 1.8Stand-by 151
38 GHz
Main path 2Stand-by 151
Note: when hot stand-by configuration on two antennas is adopted, no additional loss is inserted.
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12. Kit for ODU mounting separated from antenna
Two different kits for ODU mounting separated from antenna are available:
A. Kit for ODU mounting separated from the antenna (1+0)
This kit is used for the following configurations:
(1+0) 1 kit 2X(1+0) 1 kit for each non integrated antennaA/D repeater 1 kit for each non integrated antennaThrough repeater 1 kit for each non integrated antenna Frequency diversity 1 kit for each non integrated antenna Polarisation diversity 2 kits always
B. Kit for ODU mounting separated from the antenna ((1+1) hot stand-by)
12.1 RF flanges
Frequency (GHz) RF flangeODU side
RF flangeAntenna side
7 UDR 84 PDR 848 UDR 84 PDR 84
10.5 UBR 100 PBR 100 13 UBR 120 PBR 12015 UBR 140 PBR 14018 UBR 220 PBR 22023 UBR 220 PBR 22026 UBR 220 PBR 22038 UBR 320 PBR 320
12.2 Additional loss When kit A is used no additional loss must be consideredWhen kit B is used the same loss of the kit for hot stand-by configuration on a single antenna (integrated solution) must be considered (please refer to paragraph 11.1)
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
12.3 Flexible waveguides
Two different flexible waveguides are available, defined as:
1. Flexible waveguide for ODU mounting separated from the antenna, with diameter up to 120 cm;
2. Flexible waveguide for ODU mounting separated from the antenna, with diameter up to 180 cm.
12.3.1 Waveguide flanges
Frequency (GHz) flange towards ODU flange towards Antenna
7 PDR 84 UDR 848 PDR 84 UDR 84
10.5 PBR 100 UBR 10013 PBR 120 UBR 12015 PBR 140 UBR 14018 PBR 220 UBR 22023 PBR 220 UBR 22026 PBR 220 UBR 22038 PBR 320 UBR 320
Note: an optional twist is available when horizontal polarisation is needed.
12.3.2 Waveguide additional loss
Loss (dB)Frequency (GHz) 0.6 m length (1) 1 m length (2)
7 0.12 0.28 0.15 0.25
10.5 0.18 0.313 0.24 0.415 0.3 0.518 0.36 0.623 0.48 0.826 0.54 0.938 0.96 not foreseen
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
13. Power Supply
14.1 Input Voltage:
Standard: -48/-60 VDCTolerance: 20%Range: -38.4 V72 V
14. Power Consumption (guaranteed values)
Indoor Unita. Radio Transport Module 13 Wb. Controller card 4 Wc. Tributary Interface card 1 Wd. Alarm unit card (optional) 1.5 We. Alarm & Fan unit card (optional) 3.5 Wf. EOW (optional) 3.5 Wg. Q-Adapter 5 W
Outdoor Unit 18 W
(1+0) Terminal (minimum configuration) 37.5 W minimum (1+1) Terminal (minimum configuration) 68.5 W minimum Add/Drop Repeater (minimum configuration) 68.5 W minimum
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15. Environmental Conditions
The equipment is in accordance with ETSI specification ETS 300 019 Recommendation:
15.1 Indoor Unit Operational Temperature Range
Transportation according to ETS 300 019-1-2 , class 2.3 Stationary use according to ETS 300 019-1-3, class 3.2The only exception to the limits stated by the above mentioned Recommendation is in the temperature/humidity characteristics, which are somewhat harder. The Indoor Unit is available in two versions:
standard temperature range; the temperature/humidity characteristic shown in Fig. 15.1 is valid:
guaranteed performances -5 C +45 C degraded performances -10 C +50 C
extended temperature range; the temperature/humidity characteristic shown in Fig. 15.2 is valid:
guaranteed performances -5 C +55 C degraded performances -10 C +60 C
For the extended temperature range the IDU must be equipped with the optional alarm & fan unit.
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
15.2 Outdoor Unit Operational Temperature Range
Transportation according to ETS 300 019-1-2, class 2.3 Stationary use according to ETS 300 019-1-3, class 3.3
according to ETS 300 019-1-4, class 4.1
The only exception to the limits stated by the above mentioned Recommendation is in the temperature/humidity characteristics, which are somewhat harder.
standard temperature range; the temperature/humidity characteristic shown in Fig. 15.3 is valid:
guaranteed performances -30 C +55 C degraded performances -33 C +60 C
Furthermore an extended temperature range (down to -50C) is guaranteed with the adoption of an optional heater.
15.3 Storage temperature range
The SRA L (IDU plus ODU) meets the limits stated in ETS 300 019-1-1, class 1.3, with the exception for the temperature/humidity characteristic for which the climatogram shown in Fig. 15.4 is valid.
16. Mechanical Structure
16.1 Dimension:Indoor unit(height x width x depth) 88 mm x 450 mm x 240 mmOutdoor unit(height x width x depth) 266 mm x 266 mm x 120 mm
16.2 Weight: Indoor unit 6 Kg (fully equipped)Outdoor unit 6 Kg
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1
17. EMC/EMI & Over-Voltage protection
SRA L equipment is CE marked.
All the EMI/EMC parameters given below are in accordance with ETSI ETS 300-385 Recommendation (February ‘96): Radio equipment and systems (RES) EMC standard for digital fixed links and ancillary equipment with data rates at around 2 Mbit/s and above.
18. Mean Time Between Failure values
UNIT MTBF (kh)
Sub-rack 15938RTM Card up to 4X2 Mbit/s 379RTM Card up to 8X2 Mbit/s 346.5
Controller Card 716Tributary Interface 75 1200.5Tributary Interface 120 1226
EOW 858Double V.11 Interface 10336.5
Q-Adapter 600.5Alarm Unit 1816.5
Alarm Unit + Fan 1305.5Outdoor Unit 280
(1+0) terminal MTBF141 kh for capacity up to 4X2 Mbit/s136.5 kh for capacity up to0 8X2 Mbit/s
The MTBF values are independent from the RF band.
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19. Operation & Management
19.1 Manual Switches Power-on switch
function to switch on (position on) and off (position off) the whole SRA L equipment
location 75 & 120 ITU-T G.703 tributary interfaces
19.2 Displays
RX Field Display function 2-digit display reporting the RF
signal level (expressed in dBm) measured at point D’C’ of the relevant Outdoor Unit
location Radio Transport Module card Range from -91 dBm to -30 dBm
19.3 Push Buttons
Please refer to Fig. 19.1
19.4 IDU front panel LED’s
Please refer to Fig. 19.2
The LED’s lighting up status in normal operating conditions is reported in Fig. 19.3
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19.5 Alarm Management
SRA L equipment provides three different modes to monitor and check the alarm roots:
1. by LED’sPlease refer to Fig. 19.2 for more details
2. by Parallel InterfaceFor the list of the alarm roots available through the connector, please refer to Fig. 19.4
3. by Software
Through: Hop PC Network PC EM-OS AccessIntegrator
Note: It must be highlighted that each alarm root concerning the SRA L equipment is available via software.
The available alarm roots and the activation status of the alarm signals are summarised in Fig. 19.5
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Author: Maurizio Pecchioli, Pietro Pelizza, Business Unit Radio-Business ManagementFile: document.doc Code: G97-SRAL-SDS-1.0.1