SDS-SRAL

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 /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




18. Mean Time Between Failure values

19. Operation & Management

Annex 1 - Antenna Data Characteristics

Figures




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



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.




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




7 GHz

7.4-7.7 GHz


In field tunability

range(MHz)


(MHz)


(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




7 GHz

7.4-7.9 GHz


In fieldtunability

range(MHz)


(MHz)


(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




8 GHz

8.2-8.5 GHz


In field tunability

range(MHz)


(MHz)


(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




10.5 Ghz

10.5-10.7 GHz


In field tunability

range(MHz)


(MHz)


(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


In field tunability

range(MHz)


(MHz)


(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




15 GHz

14.4-15.35 GHz

Shifter (MHz)TX/RX spacing

In field tunability

range(MHz)


(MHz)


(MHz)336 84 Band 1=1459514679

Band 2=1467214756Band 3=1474914833Band 4=1482614910




420 115 Band 1=1450014615Band 2=1460814723Band 3=1471614831Band 4=1482414930








644 120 Band 1=1450014620 Band 1’=1514415264




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)


(MHz)


(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







23 GHz

21.2-23.6 GHz


In field tunability

range(MHz)


(MHz)


(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












26 GHz

24.5-26.5 GHz


In field tunability

range(MHz)


(MHz)


(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


In field tunability

range(MHz)


(MHz)


(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




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.




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




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




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



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


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






10.5/13GHz

Capacity(Mb/s) 2X2 4X2 8X2





Typical Threshold(dBm) -90.5 87.5 -84.5(point C; T=25C) BER 10 E-6










15 GHz

Capacity (Mbit/s) 2x2 4x2 8x2

Guaranteed TX Output Power (dBm) 18 for each capacity(at maximum setting) (point C’; )



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


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






18 GHz



Typical TX Output Power (dBm) 18 for each capacity(at maximum setting)(point C’; T=25C)













23 GHz
















26 GHz
















38 GHz (for delivery until 12/97)
















38 GHz (for delivery after 12/97)
















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(version available

until 12/97)

-81.65 -80.85 -78.65 -77.85 -75.65 -74.85

38 GHz BER10-6





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 -87.1 -84 -84.1 -81 -81.1 -7823 GHz BER10-6


degraded threshold -86.1 -83 -83.1 -80 -80.1 -7738 GHz BER10-6


until 12/97)

-81.1 -78 -78.1 -75 -75.1 -72

38 GHz BER10-6


after 12/97)

-83.1 -80 -80.1 -77 -77.1 -74




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




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







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




5.2.1 Type dual conversion 1st IF 1310 MHz 2nd IF 70 MHz

5.2.2 Spurious Emission







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




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




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)




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




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




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.




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:




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




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.




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





13 GHz

Main path 1.25Stand-by 101.5

15 GHz

Main path 1.35Stand-by 101.2

18 GHz


23 GHz


26 GHz


38 GHz

Main path 2Stand-by 151

Note: when hot stand-by configuration on two antennas is adopted, no additional loss is inserted.




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)




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




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




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:


For the extended temperature range the IDU must be equipped with the optional alarm & fan unit.




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:


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




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.




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




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




SDS-SRAL

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