ES0195A00017_03_AJ_D03.pdf

Module D03

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Processing Module of Receiving Station for

Distributed Time Systems

Document No.: ES0195A00017

Revision: 03

Revision Date: 2010-01-04

Datasheet Module D03

Copyright 2009 by ERA a.s. Pardubice

All rights reserved. This document and the information it contains are property of ERA a.s. and

confidential. They shall not be reproduced nor disclosed to any person except to those having a need

to know them, without prior written consent of ERA a.s.

L500: ES0195A00017-03

ERA a.s.

Prmyslov 387

530 03 Pardubice

Czech Republic

Tel: + 420 467 004 253

Fax: +420 466 670 461

www.erabeyondradar.com

Module D03 Datasheet

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Table of Contents 1 PURPOSE..............................................................................................5 2 BLOCK DIAGRAM.................................................................................5 3 BRIEF TECHNICAL DESCRIPTION......................................................6 3.1 MEASURING UNIT..........................................................................................................6 3.2 PC104 COMPUTER .......................................................................................................7 3.3 GPS RECEIVER ............................................................................................................8 3.4 DIAGNOSTIC BOARD ......................................................................................................8 3.5 PRECISE OSCILLATOR ...................................................................................................9 3.6 POWER SOURCE ...........................................................................................................9

4 LIST OF ESSENTIAL PARAMETERS.................................................10 5 SUBJECT ILLUSTRATION WITH PARTICULAR PARTS

LABELING ...........................................................................................11 6 LIST OF CONNECTION POINTS ........................................................13 7 LIST OF INDICATORS ........................................................................13 8 INDICATION AND LOCALIZATION OF ERROR CONDITIONS.........14 9 LIST OF SETUP AND CONTROL ELEMENTS...................................14 10 LIST OF DIAGNOSTIC OUTPUTS ......................................................14 11 REPLACEMENT PROCEDURE ..........................................................15 11.1 DISASSEMBLY .............................................................................................................15 11.2 ASSEMBLY AND SETTING BY SERVICE NOTEBOOK.........................................................16 11.3 ASSEMBLY AND SETTING BY USB DISK ........................................................................17


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10MHz

RS232

Time-mark 1 pps

GPS RECEIVER

MEASURING UNIT

COM1 Computer PC 104

COM2 RS232

DIAGNOSTIC BOARD

Parallel bus

PRECISE OSCILLATOR

POWER SOURCE

24V 2x LAN Diagnostic inp.

Connector 5

Connect. 8 VGA

SSR videosignal inputs

Connector FV1

GPS antenna interconnection

Connector 1 Connectors 2 and 3

Connect. 7 USB (2x), KEYB. MOUSE

OP

OP OP

OP = OVER - VOLTAGE PROTECTOR

Connector 6 Connector 4 Reserve input

GPS SU PPORT

1 Purpose The D03 module serves for parameters measurement of Secondary Surveillance Radar (SSR) replies in multilateration systems with distributed time measurement. The D03 module processes a detected signal from the SSR receiver so called video signal. The D03 module evaluates the SSR replies mainly the reply detection, reply time of arrival (TOA) measurement and the detection of the reply data contents. Based on the evaluation results, the D03 module generates output messages transmitted to central station of multilateration system via the Local Area Network (LAN). The D03 module has two independent video signal inputs and can evaluate video signals from two SSR receivers. Since the D03 time-base for the TOA measurement is not synchronized, the D03 module is equipped with the GPS unit for the time-stamping of the time-base.

2 Block Diagram

Figure 2-1 D03 Module Block diagram


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3 Brief Technical Description The D03 module comprises following components (see Figure 2-1): Precise oscillator it generates precise frequency for the time-base in

the measuring unit. Measuring unit it performs the SSR reply detection, TOA measurement

of SSR replies, and TOA measurement of the GPS time mark signal. Computer PC104 it ensures the D03 module control, measured data

evaluation, and interconnection with the external environment (via LAN). Diagnostic board it performs diagnostic measurements. Among others,

it measures the GPS receiver temperature, which serves for the GPS time-stamping correction.

GPS receiver a receiver of the satellite navigation, utilized like a source of precise time-stamping. The GPS antenna with the pre-amplifier is situated in the external antenna unit.

Power source it performs the voltage conversion from the 24 V DC to the internal voltage levels.

Overvoltage protectors of the LAN lines and GPS antenna cable.

3.1 Measuring Unit The measuring unit consists of following components: Two measuring channels for SSR signals. One special measuring channel for the GPS time-mark measurement. One reserve measuring channel for another input (e.g. for a signal from

the SSR interrogator). Timer (Time counter). Circuits for communication with the computer.

Timer

The periodical signal of 10 MHz arrives to the measuring unit from the precise oscillator. Measuring unit generates a high frequency clock signal from this 10 MHz signal. The high frequency signal is necessary for precise TOA measurement. The time counter (TIMER) in the measuring unit, which generates a time-base for the TOA measurement in all measuring channels, is controlled by this clock frequency.

SSR measuring channel

The SSR measuring channel processes a normalized videosignal from the SSR receiving unit. The normalized video signal is an envelope of the HF signal with normalized amplitude (approx. 4 V). There are two independent measuring sections in each SSR measuring channel for A/C mode and for S mode. The A/C mode processing is based on presence of the frame pulses F1 and F2, which are present in all A/C replies. In case of the frame pulses detection, the time of the reply arrival (TOA) is measured and reply data


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contents detected. These measured data (TOA and reply data) are transferred to the PC104 computer. The S mode processing is based on the S mode preamble detection. In case of the preamble detection, a time of preamble arrival (TOA) is measured, and then the data contents detected. Such measured data (TOA and reply data) are transferred to the PC104 computer. GPS time-mark measuring channel

This simple measuring channel measures the TOA of the GPS time-mark pulse. This measured TOA value is transferred to the PC104 computer.

Reserve measuring channel

This channel is intended for the signal from the SSR interrogator measurement. This function is not implemented in the measuring unit software and firmware actual version of D03 module yet.

Communication circuits

These circuits ensure the measuring unit connection to a parallel bus of the PC104 computer. The circuits perform transmission of measured data from all measuring channels to the PC104 computer and the measuring unit control from PC104 computer.

LED drivers

Besides the main functions, the measuring unit is also equipped with LED drivers for two LED indicators. These indicators (Run and Diag see chap. 7) are situated on the module front panel, and the measuring unit enables their control by means of the PC104 computer software.

3.2 PC104 Computer This computer is based on standardized PC104 architecture. Computer is equipped with standard interfaces (serial ports, LAN, etc.). The following computer interfaces are used in the D03 module: Parallel bus interconnection with the measuring unit. COM1(RS232) Serial port interconnection with the GPS receiver. COM2(RS232) Serial port interconnection with the diagnostic board. LAN computer network (input/output) interconnection with the external

environment (especially with central station). There are two LAN interfaces in the PC104 computer. These interfaces are connected to the D03 connectors 2 and 3 via overvoltage protectors.

Interfaces for service purposes: Two USB interfaces, output (VGA) to an external monitor, and inputs for the keyboard and mouse.

The computer provides a control of connected D03 module components and evaluates data from these components. It creates output messages as a


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result of this evaluation process, and these messages are periodically transmitted to the computer network LAN output. The LAN also enables the remote control of the PC104 computer from an external computer.

3.3 GPS Receiver The GPS receiver is a receiver of the satellite navigation. It enablers the central station of the multilateral system performing the time synchronization of TOA values from remote stations (from D03 modules) using the Common View method. The GPS Receiver is placed on the Diagnostic board, because this board provides supporting functions for GPS Receiver (feeding, interface conversion etc. see paragraph 3.4). HF signal from the external GPS antenna unit is led to the D03 module through a coaxial cable and passes via overvoltage protectors to the GPS receiver. Coaxial cable also feeds the antenna preamplifier (in the antenna unit) from the GPS receiver. The GPS receiver evaluates signals from the GPS satellites and transmits GPS data from the GPS receiver to the PC104 computer via a serial interface. These GPS data include actual time value and corrections for individual satellites. A time-mark pulse (1 PPS pulse) from the GPS receiver determines an accurate time moment of the actual time validity. This pulse is led to the measuring unit where the TOA of the pulse is measured. The GPS receiver mode (message type, data rate, etc.) is set from the PC104 computer via a serial interface.

3.4 Diagnostic Board The diagnostic board is designed for the monitoring of several analogue and digital inputs (voltages, contact states, etc). The diagnostic board periodically creates output messages from states of monitored inputs, and transmits these messages to the PC104 computer via a serial interface. Diagnostic board has following diagnostic inputs: Data from a temperature sensor situated near the GPS receiver HF

circuits. The temperature reading enables the time-mark TOA temperature correcting in the PC104 computer according to the actual temperature.

Voltage of an external power source (24 V) measured on the input connector 1 of the D03 module.

Feeding current to the GPS antenna unit preamplifier. This reading can indicate the preamplifier failure or antenna cable failure (or disconnection).

One external electrically isolated input from the D03 connector 1. This input is usually used for the mains failure indication from an external power source, when the mains (230 V) was turned out and the remote station is battery supplied.


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The GPS receiver is situated on the diagnostic board. The board ensures the GPS receiver temperature measurement, GPS receiver feeding, and performs the interface conversion of GPS signals. Serial interface of the GPS receiver is converted to the RS232 serial interface of the computer. The time-mark signal from the GPS receiver is amplified by a line driver on the diagnostic board and transmitted to the measuring unit.

3.5 Precise Oscillator An ultra precise, frequency stable oscillator is used as a reference time source in the D03 module. It generates an output signal with the precise frequency of 10 MHz for time-base of the measuring unit. A double-oven frequency normal with determined time stability and guaranteed Allan deviations (10 s - max. 5 x 10-12) is the core of the precise oscillator. The output signal (10 MHz) is transmitted to the measuring unit with the help of a buffer amplifier. The normal is situated in an anti-vibration housing. The precise oscillator is fed directly by the primary voltage of 24 V owing to relatively high power consumption of the oscillator heating especially after the module switching on, or at low temperatures. The heating is automatically turned out, as soon as the precise oscillator temperature reached correct value (approx. 50 C).

3.6 Power Source This power source is based on standardized PC104 architecture. It converts the input voltage (typically 24 V DC) from the D03 connector 1 to appropriate voltage levels for feeding module D03 components (+5 V, -5 V, +12 V and -12 V). Input voltage (24 V) presence is indicated by LED on the module front panel.


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4 List of Essential Parameters Electrical parameters

Power supply voltage +20 V +28 V (nominal +24 V) DC Power consumption max. 45 W (when the Precise Oscillator heating is on) SSR Video signal inputs Two TTL inputs (nominal 4 V), coax. cables 75 . Reserve input TTL (nominal 4 V), coax. cables 75 . GPS antenna input Single coax. cable with +3 V power voltage on center

conductor.

LAN Two LAN connections. 10/100 Base - TX Ethernet. External diagnostic input One input isolated by optocoupler.

Overvoltage protectors On GPS antenna connection and on both LAN connections.

Detected SSR modes A, C, S Discrete of TOA measurement 3.125 ns IP rating IP67 Ambient operating temperature -40 C +60 C Ambient non-operating temperature -50 C +70 C

Mechanical parameters W x H x D (without holders and connectors) 110 mm x 291 mm x 291 mm Weight 8.5 kg

Operational conditions Tested according to Temperature range -40 C +60 C SN ETS 300 019-2-4, class 4.1 E

Climate specification Humidity rh < 0 %, 100 % >

SN ETS 300 019-2-4, class 4.1 E

IP67 MIL-STD-810F/METHOD 512.4 Salt fog MIL-STD-810F/METHOD 509.4 Environmental effects Fungus (Microbiotics) MIL-STD-810F/METHOD 508.5

EMC Compliant EMI - SN EN 61000-6-3 EMS - SN EN 61000-6-2

Sinusoidal vibrations (a 1 g, f 200 Hz)

SN ETS 300 019-2-4, class 4.1 E SN EN 60068-2-6 Fc, class 4M5

Mechanical specification Shocks (a 25 g) Duration 6 ms

SN ETS 300 019-2-4, class 4.1 E SN EN 60068-2-29, class 4M5, method Eb

Storage conditions Climate specification -50 C +70 C SN EN 60068-2-14 Nb


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5 Subject Illustration with Particular Parts Labeling The D03 module components are placed in a hermetic sealed enclosure made from an aluminum-alloy. The enclosure provides protection against the dust, water, and other environmental conditions in accordance with the IP67 rating.

Figure 5-1 D03 Module Drawing


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Figure 5-2 D03 Module 3D view


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6 List of Connection Points The D03 module connectors are shown in figure Figure 51. A Grounding bolt situated under LED indicators (see Figure 5-2) serves for the module grounding.

Label Description

1 Input Power supply input (24 V) and diagnostic input (usually 230 V mains failure indication from the power source).

2 Input/Output Second LAN input/output of the computer network. 3 Input/Output First LAN input/output of the computer network. 4 Input Reserve input of the measuring unit. 5 Input Input of the first video signal from the SSR receiver.

6 Input Input of the second video signal from the second SSR receiver. Usually only a single video signal is used. In such case, the Connector 6 is not used.

FV1 Input Connection to the GPS antenna unit. 7 Input/Output Two USB interfaces. 8 Output Monitor output (VGA) and keyboard and mouse inputs.

7 List of Indicators There are three LED indicators on the front panel of the D03 module: 24 V, Run and Diag.

Green LED 24 V indicates a presence of the supply voltage on the connector 1. If this LED extinguished, there is a failure in the external power source, or feeding cable, or the LED 24 V is faulty.

Special indication of LED Run and DIAG at setting from USB When the D03 module set from the USB disk, both Run and Diag LEDs indicate a termination of the setting by blinking with period of 3 Hz. This indication is not used in normal operation it is used only when the USB disk is connected to the D03 module.

Yellow LED Run indicates some sates of the measuring unit and some program functions: Long blink (3 s) with short interruption (300 ms): normal state. Blinking with period of 2 Hz: no data from the first channel of the

measuring unit (this channel is connected to the connector 5). A failure is in the D03, or no SSR replies arrive to the connector 5 (the SSR receiver or cable failure). State of the second channel is not indicated by LED.

Other blinking mode or the Run extinguished: other failure in the D03 module.


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Yellow LED DIAGindicates GPS functions and some program functions: Long blink (3 s) with short interruption (300 ms): Normal state. Other blinking mode, or DIAG extinguished: An internal failure in the

D03.

8 Indication and Localization of Error Conditions State of the D03 module is transmitted to an external computer (usually to the Central Processing Station) via LAN. A main tool for the failures detection and localization is a diagnostic program in this external computer. Some of important states of D03 are indicated by LED indicators on the D03 front panel. Description of these states is given in chapter 7.

9 List of Setup and Control Elements The D03 module has no mechanical setup and control elements. The D03 setting can be performed via LAN from an external computer (from the Central Processing Station, or from a service notebook) or via a USB disk. These functions are described in chapter 3.

10 List of Diagnostic Outputs The equipment lacks setup or control elements accessible for the customer.


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11 Replacement Procedure The D03 module replacement (usually by a spare part) is divided in two phases: Disassembly of the D03 module. Assembly of the D03 module assembly and its setting in accordance with

the actual site (LAN IP address setting). The D03 setting can be performed with the help of a service notebook, or USB flash disk see par. 11.2 or 11.3. When the D03 setting by the first method not successful, the second method should be used. For example, if an incorrect IP address set (by mistake) in the D03 by means of a notebook, and the notebook cannot cooperate with the D03, the situation can be resolved by means of the USB disk application.

Figure 11-1 D03 Module Replacement

11.1 Disassembly Remove connector shrink protections. Disconnect cables from all module connectors. Disconnect grounding cable. Slacken locking screw. Eject entire module upwards. Remove the module from the cabinet.

Holders

Locking screw


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11.2 Assembly and Setting by Service Notebook Aids Maintenance notebook. Crossed UTP cable of the LAN.

Notebook Preparation 1) Record IP address and subnet mask (TCP/IP protocol setting in

network connections of the Windows system) in order to recover setting after the D03 module replacement termination.

2) Set TCP/IP parameters according to the LAN1 network connection of the D03 spare module enter identical IP address and subnet mask, and change the last position of the IP address by 1 (in the following example subnet mask is 12 in the D03 and notebook is changed to the value of 13). Other parameters may remain unchanged.

Example:

D03 Notebook Subnet Mask 255.255.255.0 255.255.255.0 IP address 192.168.46.12 192.168.46.13

D03 Mounting and Setting Procedure (From a Notebook) 1) Shift the module into the cabinet, suspend it in pertinent position and

tighten the locking screw see Figure 11-1. 2) Connect the grounding cable. 3) Connect the supply cable to the connector 1 of the D03 module. 4) Connect Maintenance Notebook to the LAN1 connector 3 of D03

module: LAN connectors RJ45 are within connectors 2 and 3. Notebook shall be connected with the help of UTP crossed cable. Login to the D03 computer desktop shall be performed according to the Instructions for Operations, Maintenance and Repairs (IOMR) Basic remote operations run program Remote Desktop Connection (menu: Start Programs Accessories Communications Remote Desktop Connection).

5) In the D03 computer remote desktop window, change TCP/IP parameters of the LAN2 to values specified for the D03 computer of particular site, which was replaced. Then change TCP/IP parameters of the LAN1 to values specified for the D03 computer of particular site. Be careful in case of an error in the new setting, it shall not be possible to login the D03 computer again.

6) Log off from the D03 (Start Log Off) - Program Remote Desktop Connection will be automatically finished.

7) Connect all connectors of the D03 module according to the operational wiring diagram.


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8) Check performance of the application software (with the help of the Management System).

9) Mount connector shrink protections according to appropriate instruction for this operation.

In case of the application software incorrect performance, carry out its updating and/or adaptation data updating. Notebook Setting Recovery After the D03 module replacement process termination, set the TCP/IP parameters of the notebook to originally recorded values.

11.3 Assembly and Setting by USB Disk Aids At the D03 module replacement, following items are to be utilized: Service USB flash disk comprising data for the D03 setting on particular

sites. Service notebook or other computer with USB interface for the USB disk

preparation. USB disk preparation 1) Connect the USB flash disk to the notebook. 2) USB disk contains directories with names according to particular sites.

Select a directory according to the site, and copy its contents to the USB disk root directory with overwriting similar files.

3) If TCP/IP parameters setting of the D03 in system were changed, it shall be necessary to update files on the USB disk (in the \common directory, particular dtXX.txt files, where XX is the site number).

D03 Mounting and Setting Procedure (Using USB Disk) 1) Shift the module into the cabinet, suspend it in pertinent position and

tighten the locking screw see Figure 11-1. 2) Connect the grounding cable. 3) Remove cover from the connector 7 (USB) and connect a special

cable for the USB connection to the connector. 4) Connect the USB flash disk to the special cable. 5) Connect the supply cable to the connector 1. 6) Wait till the indication of the operation termination appears. LEDs Run

and Diag on the D03 are blinking simultaneously with frequency of approximately 3 Hz indication that the D03 setting from the USB disk is terminated.

7) As soon as the operation termination indicated, remove the USB flash disk.


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8) Disconnect cable from the connector 7 (USB) and mount the connector cover of the connector 7.

9) Connect all connectors of the D03 module acc. to operational wiring diagram.

10) Check performance of the application software (with the help of the Management System).

11) Mount connector shrink protections according to appropriate instruction for this operation.

For check purposes, TCP/IP setting before and after the operation is stored on the USB flash disk may be consecutively checked. In case of the application software incorrect performance, carry out its updating and/or adaptation data updating.

ES0195A00017_03_AJ_D03.pdf

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