15 GHz MW Link Using Siemens SRAL XD

1. Basic configurationa. IDU plug-in is used having E1 capacity of 4X2 Mbps separate

card concept i.e. i. Plug-in cardsii. Hot replacement of faulty cardiii. HW is in 1+1 hot standby configuration

b. Dimensions: 1 U high for 1+1 and 2X(1+0)

c. Power Supply: -48V + 20%

d. Tributary Interface Options:=> Sub-D 50c 120/75 Ohm=> U Coax 75 Ohm=> Lemo 120 Ohm

e. Three Sections of IDU

(i). BB card i.e. Base band cards. Two BB cards for 1+1

configuration, each of the BB cards has power supply

points coax for IDU-ODU link and alarm indicating LEDs.

It is located on right side of IDU.

(ii). Controller Unit : Located in the center of IDU. This card

houses F interface, V Bus point and LAN interfaces for

remote network management. It stores all system

configuration and copies of software banks present on

different modules in the system.

(iii). Access Card: located on the left side of the IDU. It houses

the tributary interfaces ( 75 Ohm or 120 Ohm), memory key,

system power switch, alarm interface and user ID ex

channels.

f. ND ODU: Normal density ODU is used.

• Modulation formal : 4CPM

• RF bands : 13 to 38 GHz

• Attenuation Range : 24 db up to 23 GHz

20 db 26 to 38 GHz

• ATPC : Driven by Rx power and BER

• Dimensions : 230 X 230 X 110 mm

• Weight: 4.3 Kg

2. General Characteristics

a. Transmission Capacity: 4X2 Mbps

b. Gross bit rate of Transmitted signal: 9.728 Mbps

c. Modulation: 4 CPM

d. IDU – ODU Interface: (i) Line Code - B32S

(ii) Bit Rate - 51.84 Mbps

e. Max IDU – ODU distance: 200m

f. Frequency Channel Spacing: 7 MHz

3. System Performance

a. Tx power : 20dbm

• RSL @ 10-3 dbm : -83.5

• System Gain @ 10-3: 103.5

4. Supporting frame for ODU

For ODU in 1+1 HSBy configuration, balanced coupler is being used.

No need of any waveguide.

5. Antenna

0.6m Diameter Antenna is used

6. IDU/ ODU Coaxial Cable

Braided coaxial cable is used for IDU/ ODU interconnection.

It allows a maximum length of 200m.

7. IDU Basic Function

• System interfacing to external world.

• Base band digital signal processing.

• IDU-ODU cable interface management.

• Supervision and configuration/ management of the equipment.

• Equipment power supply management.

8. ODU Basic Function• IDU – ODU cable interface management.

• Modulation of base band digital signal ( from IDU).

• Demodulation of the received RF signal ( to IDU).

• Supervision and configuration management of the ODU.

• Management of comm channel from/ to IDU controller.

9. Physical Interfaces Of SRAL XD9a. User Channel:

A 64 Kbps synchronous data channel ( v.11) for application

defined by the user. The user channel can be configured in

2 modes.

(i). Contra Directional: Clock associated with the input data

stream originated by BB unit and

delivered to external equipment.

(ii) Co-directional: Clock associated with the input data

stream originated by an external

equipment and delivered to BB unit.

9b. Alarm and remote control external line:

It has 2 functions

(i) Transparent carrying, through the Radio link of up to 4 alarm

and command lines delivered to the outside e.g.. Alarm of

open door, smoke alarm, switching commands etc.

(ii) Sending of 7 output alarms relevant to the equipment

status.

9c. Monitoring received RF power on the ODU

ODU has a monitoring point to measure received radio signal

field.

10. Supervision Interfaces

10a. F Interface

It allows SRAL XD LCT connection i.e. SRAL XD with PC.

10b. R Interface

It allows SRAL XD SRAL XD.

It is external to the equipment and is not accessible to the user.

10c. U- LAN Interface

It allows SRAL XD SRAL XD networking for supervision

purpose for, when NEs are placed at the same location. Only

cable connections is available among NEs.

10d. Q- LAN Interface

It allows SRAL XD SRAL XD networking for supervision

purpose, when the NEs are placed in the same location and

they are not terminals of the same Radio link (i.e. only cable

connection is available among the NEs ) and V-LAN interface

is not available (i.e. Q-LAN and V-LAN permit daisy chaining)

It is used to allow SRAL XD to TMN operation support.

10e. D Interface

D Interface used to connect two NEs which belong to disjoined

radio networks. It is internal to the equipment.

11. IDU-ODU Interconnection

11a. It is realised through 50 ohm coaxial braided cable

11b. The communication bit rate is 51.84 Mbps.

11c. IDU-ODU communication is through signaling channel.

11d. DC power of ODU is also supplied through this cable.

12. LED and Monitoring Points

12a. LEDs in BB cards(i) ODU Alarm: Red lights up when alarm is present on the ODU or ODU disconnected.

(ii) Cable Alarm: Red:- Lights up when current drain is higher than

expected. It may be due to short circuit on thecable or on the ODU.

Yellow:- Light up when current drain is lower than theexpected. It can be due to cable breaking down or being disconnected or absence of ODU.

(iii) CHA Alarm:

Green:- When BB Signal implements its own normal

path in both directions.

Yellow:- Lights up when the channel is used in software

forcing.

(iv) CHB Alarm:

Green:- When BB signal implements it own normal

path in both direction (Tx & Rx ) (1+1 System).

Yellow:- When channel is used in software forcing

mode.

(v) Alarm:

Red:- Card fail alarm. It also lights up when there are

no internal power supply.

12b. LEDs In Controller Card

(i) Alarm:

Red:- Card fail alarm. Also when there is no internal

power supply voltage.

(ii) Test Alarm:

Yellow:- When manual operation in progress.

Equipment is forced in to an unusual condition.

(iv) Critical/ Major Alarm:

Red:- It denotes presence of critical/ major alarm

inside IDU.

(v) Minor/ Warning Alarm:

Red:- It denotes the presence of a minor/ warning

alarm inside IDU.

Installation Procedure of SRAL XD Login Software

Installation Procedure of SRAL software

• Screen will appear having folders• E• LCT-SRAL XD• Plug –in –SRAL SD 1.3

Double Click LCT SRAL XD folder. Followingfolder will appear along with files

• Download• Plugins.ins• TCP.INS

TCP INSTALLATION

1. Double click TCP.INS. Following folder will appear

a. CD

b. Floppy

2. Double Click CD folder and run the SETUP.exe file

3. Click the Install your Frontier Product now.

4. Press OK button now.

5. A dialog box will pop up to shut down all other applications. Click OK button

6. Enter your name and company’s name (any) in the dialog box and press OK

7. Enter the serial no : 13_130_044_53

and

authentication key: c2c_e5f_a4

Then

press OK

8. Windows NT privileges Warning will pop up. Press OK button TCP installation will start.

9. Dialog for reboot will pop. Press Yes and wait for computer to restart

LCT INSTALLATION

1. Now Go back to E:\LCT-SRAL XD folder and run the setup.exe file

2. Press Next in install shield Wizard for LCT 5.0. window

3. Press yes in License Agreement window.4. Press Next in Choose Destination Location

window5. Installation will start. 6. A Dialog box will pop up “Do you want to install

available plug-ins”.7. Press No8. Press finish.

Wait for computer to restartNow go back to home to E:\ drive (or CD drive)

PLUG IN INSTALLATION

1. Select Plug in SRAL XD folder and press enter2. Select Disk1 folder and press enter3. Run Setup.exe file4. Press next in Welcome window5. Press OK in Information dialog box6. Press Yes in License Agreement window7. Press Next in Choose Destination Locaton

window8. Select Microsoft Internet Explorer in Select

Browser Window and press Next9. Press Finish in Setup Complete window

Configuring the Software

1. Click Start button in windows toolbar. Select Settings and then control panel.

2. Select Phone and Modem option.

3. Select Modem Tab in Phone and Modem option window

4. Press Add button & Select Don’t detect my modem; I will select it from list Install new Modem window and press Next

5. Select Have disk in Add Hardware wizard.

6. Double click driver folder.

7. Select WIN_NT40 folder

8. Select MDMITV01.INF file and press open.

9. Press OK in Install from Disk window

9. Select RADIO equipment Windows NT Direct Connection and press Next.

11. Select COM1 and press Next

12. Press Finish

New Dial Up Connection

1. Click Start button in windows toolbar. Select Settings and then Network and Dial up Connection.

2. Select Make New Connection. 3. Select Connect Directly to another computer

and click Next in Network Connection Wizard window

4. Select Guest option and press Next button5. Choose RADIO equipment Windows NT Direct

Connection (COM1) in the List box and press Next6. Choose for all user option and press Next7. Type SRAL in text box and press Finish.

Alarm Management

SRAL XD LEDs & Monitoring points

• There are several LEDs on Controller and BB cards to indicate level 1 alarms.

SRAL XDBB card LEDs

SRAL XD Normal working conditions of system

Normal operating conditions

Normal operating conditions of the equipment are indicated as follows:

– Power Supply switch on the 16xE1 Tributary (“ON” = position “I”)

– all red LEDs on the front panel of the units: OFF

– RF output power and RF input power at nominal values (See figure below)

Normal operating conditions

SRAL XDAlarm management

Level 1 Alarms– Critical: Alarm condition that involves the operation ability

and that requires for an immediate corrective action.– Major: Alarm condition that involves the operation ability

and that requires for an urgent corrective action.– Minor: Alarm condition that involves the operation ability

and that requires for the execution of a corrective action to prevent higher damages.

– Warning: Condition of potential alarm or of potential service prevention, detected before it can cause some effects on the system; it is necessary to execute an action for an additional diagnosis operation (if it is necessary) and the trouble has to be corrected to prevent that it can cause higher fails.

– Test: Equipment in test or manual forcing condition via software.

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Level 2 Alarms

Replacement of units

Replacement of IDU units

Baseband unit

1. Disconnect the power supply cable from the front panel of the unit.2. Remove the faulty unit.3. Insert the spare unit.4. Connect back the power supply cable on the front panel of the unit.5. Check that the link has been restored (no alarm).

Controller unit

1. Remove the unit (the NE will be lost from LCT).

2. Insert the spare Controller unit. The equipment configuration, that has been memorised on the KEY, will be automatically stored in the new Controller unit.

Replacement of IDU units

16xE1 Tributary unit

1. Disconnect all the cables from the front panel of the unit.2. Switch OFF the unit through the switch placed on the

front panel of the unit.3. Remove the unit.4. Extract the KEY.5. Insert the KEY in the spare unit.6. Insert the spare unit in the subrack.7. Connect back all the cables.8. Switch on the unit through the switch placed on the front

panel of the unit.9. Check that the link has been restored (no alarm).

Replacement of ODU in 1+1

• ODU replacement

1. Force ON LINE the other BB and the hitless switch via LCT commands.

2. Perform by LCT the power down command in the ODU to be replaced.

3. Disconnect the IDU/ODU cable (ODU side).4. Replace the ODU and connect again the IDU/ODU cable.5. Perform by LCT the power up command in the replaced ODU.6. Wait until all alarms disappear from alarm list.7. Wait at least 30 seconds before removing all forcing via LCT

commands.8. Verify that the link has been recovered (no alarms).

Replacement of IDU- ODU cable

• IDU-ODU cable replacement

1. Force ON LINE the other BB and the hitless switch via LCT commands

2. Perform by LCT the power down command in the relevant ODU.

3. Disconnect the fault IDU-ODU connection cable.4. Connect a new IDU-ODU cable.5. Perform by LCT the power up command in the relevant ODU.6. Wait until all alarms disappear from alarm list.7. Wait at least 30 seconds before removing all forcing via LCT

commands.8. Verify that the link has been recovered (no alarms).

End