Advantech INTRAC-305 User Manual

INTRAC-305 PREFACE

INTRAC™-305

INTELLIGENT TRACKING ANTENNA CONTROL UNIT

INSTALLATION & USER MANUAL

ISSUE 3.2

10 June 2008

Advantech AMT Ltd

39 Edison Road

St Ives

Huntingdon

Cambs PE27 3LF

England

Tel UK General Enquiries 01480 357600 International General Enquiries + 44 1480 357600

Fax UK 01480 357601 International + 44 1480 357601 e-mail info.europe@advantechwireless.com

Website http://www.advantechwireless.com

The copyright of this document is vested in Advantech AMT Ltd and the document is issued in confidence for the purpose only for which it is supplied. It must not be reproduced, in whole or in part, or used for tendering or manufacturing purposes or disclosed to a third party except with the written consent of Advantech AMT Ltd. Advantech AMT is a wholly owned operating company of Advantech Wireless Inc.

PREFACE INTRAC-305

PREFACE

This equipment manual provides user/operational and

installation information on the Advantech AMT Limited INTRAC-305 Satellite Tracking Antenna Controller.

MANUAL SECTIONS :-

Introducing the INTRAC-305 An overview of the INTRAC-305.

Safety Safe usage of the INTRAC-305.

Specification & Options The supplied specification, the fitted options and the available

options.

Operating the INTRAC-305 How to use and operate the INTRAC-305.

Alarms A description of the alarm conditions which can occur.

Technical Description A technical description of the operation of the INTRAC-305.

Installation How to install and set-up an INTRAC-305 system, includes

information on the external connections to the INTRAC-305.

Fault Finding Assistance in finding any faults which may arise.

Warranty and Repair Warranty and repair service provided by Advantech AMT Information Ltd.

INTRAC-305 PREFACE

CONTENTS INTRAC-305

SUBJECT PAGE

Preface ................................................................................................................... i

Contents .................................................................................................................. ii

Introducing the INTRAC-305 .................................................................................... iv

Quick Start Guide …………… ………......................................................................... vii

1. SAFETY ................................................................................................................. 1

Electrical ................................................................................................. 1

Fusing ...................................................................................... 1

Earthing .................................................................................... 1

Battery Disposal ....................................................................... 1

RF I/P Connector Voltage ......................................................... 1

Emergency Stop ....................................................................... 1

Mechanical .............................................................................................. 2

EMC ........................................................................................................ 2

2. SPECIFICATIONS & OPTIONS ............................................................................ 3

Requirements of Antenna System .......................................................... 3

Specification ........................................................................................... 4

Options ................................................................................................... 6

3. OPERATING THE INTRAC-305 ............................................................................ 9

Front Panel ............................................................................................. 9

The Menu Structure ............................................................................... 10

The Menu Screen ................................................................................... 11

Alphabetical Index of the Menus ............................................................ 12

The Menus ............................................................................................. 14

Normal Operation ................................................................................... 50

4. ALARMS & ERRORS ............................................................................................ 51

Primary Alarms ...................................................................................... 51

Secondary Alarms .................................................................................. 52

Alarm Outputs ........................................................................................ 52

Recovering from Alarms ........................................................................ 52

Power Failure ......................................................................................... 53

Errors ..................................................................................................... 53

IESS-412 Data ....................................................................................... 53

5. TECHNICAL DESCRIPTION ................................................................................. 55

The Tracking Algorithm ......................................................................... 55

The Modes ............................................................................................. 58

Standby ................................................................................... 58

Auto .......................................................................................... 58

Manual ..................................................................................... 59

Goto ......................................................................................... 59 Sleep 7

Remote .................................................................................... 61

Using IESS-412 or NORAD Data .......................................................... 61

The IESS-412 Data ................................................................. 61

NORAD Data ............................................................................ 63

Rapid Model Generation ........................................................................ 63

Program Track ....................................................................................... 64

Reserve Model ........................................................................................ 64

Clear Models ........................................................................................... 64

Antenna Motion Limits ............................................................................ 65

Axes Position .......................................................................................... 65

Tracking Signal ....................................................................................... 65

INTRAC-305 CONTENTS

SUBJECT PAGE

6. INSTALLATION .................................................................................................….. 67

Introduction ..........................................................................................…. 67

Connections (general) ............................................................................ 68

Rear Panel Layout .................................................................................. 69

Connector Pin Allocations :-

Resolvers ...................................................................………….. 70

Motor Control ............................................................................ 71

Stp-Trk / Alarms ......................................................................... 72

Communication Ports ................................................................. 72

Remote Port …………………………………………… 72 Test Ports ………………………………………………. 73

Serial Port RS422/423 Setting .............................…. 74

Serial Port Usage .................................................…. 74

Tracking Signal Connections ..................................................…. 75

Resolvers (pointing angles) ....................................................................... 75

Southern Hemisphere ............................................................................… 76

Tracking Signal Input ...........................................................................…. 76

With IBR-L .............................................................................…. 76

Without IBR-L ........................................................................…. 76

Operational Checks ..............................................................................…. 77

7. FAULT FINDING .................................................................................................... 79

Introduction ............................................................................................ 79

Fault Symptoms :-

INTRAC doesn’t appear to power up ....................................... 80

Replacing display back-light ..................................................... 80

Front panel keys do not function .............................................. 82

Emergency Stop does not function .......................................... 82

Pointing angles incorrect ......................................................... 82

No antenna drive ...................................................................... 83

No tracking signal ..................................................................... 84

8. WARRANTY & REPAIR ........................................................................................ 85

Warranty ................................................................................................. 85

Repair Service ....................................................................................... 85

Repairs not under Warranty ................................................................... 86

APPENDICES ........................ See separate appendices index ............................. 87

INTRODUCTION INTRAC-305

INTRODUCING THE INTRAC-305

The INTRAC-305 INtelligent TRacking Antenna Controller is a microprocessor based controller for tracking any nominally geostationary satellite including those at low elevation or with high angles of inclination. It has been designed as a direct physical replacement for the Andrew APC300 Steptrack Controller. For information on replacing an Andrew APC300 with the INTRAC-305 see section 6 - Installation.

The INTRAC-305 builds a model of the satellite’s orbit using a mathematical algorithm. To build the orbit model the INTRAC makes measurements by perturbing the antenna pointing angle very slightly and monitoring the change in received beacon signal strength. These small movements enable the INTRAC to estimate the position of the satellite and this estimate is used by the modelling algorithm.

The system always tracks the satellite from the orbit model. The small movements of antenna pointing are only used to maintain and update the model.

By using the model to point the antenna the INTRAC system ensures that the antenna is always pointed accurately at the satellite. This is in contrast to Step Track systems where the antenna spends most of the time not actually pointing directly at the satellite.

The regular measurements made by the INTRAC ensure that changes in the apparent orbit, due to station keeping manoeuvres or other causes, are identified. The model is modified and refined to incorporate these changes and accurate tracking is automatically maintained. The INTRAC will automatically increase the measuring rate if necessary in order to obtain sufficient information on the changing orbit.

As the INTRAC tracks using its orbit model it will continue to track the satellite if the tracking signal is degraded or lost. The satellite position may be accurately predicted from the model for up to 72hrs without a tracking signal.

The INTRAC system provides this exceptional tracking performance and robustness for satellites with any inclination, at any look angle, even in the presence of severe beacon signal degradation entirely automatically. No operator intervention or parameter setting is required when conditions or satellites are changed.

INTRAC-305 INTRODUCTION

A Typical System

The antenna position resolvers provide direction information to the INTRAC. The IBR-L (beacon receiver) provides tracking signal strength. (A signal strength derived dc voltage from an external receiver may be used in place of the Advantech AMT IBR-L)

The Motor Drive Cabinet receives the antenna drive commands from the INTRAC and drives the azimuth, elevation and polarisation (option) motors and brake assemblies.

Limit switches on the antenna prevent it from being moved beyond mechanically defined positions.

The INTRAC-305 may be controlled from its front panel or from an optional PC based Remote Control and Monitoring Terminal.

Retro Fitting Existing Step Track or Program Track installations may be

updated to INTRAC systems. Advantech AMT Ltd. have considerable experience of retro fitting INTRAC systems.

IQUICK START GUIDE INTRAC-305

A suggested quick start procedure is given below:

1/ Before modifying system make a note the antenna pointing angles from the old tracking

system. 2/ Perform any recommended resolver mounting bracket modifications. 3/ Connect INTRAC-305 in place of Andrew APC300 and check that the Fitted Options

(Home>Function>System Setup>Fitted Options) (Manual page 39) are set correctly. Note

that the resolvers used with the APC300 system were normally x2 resolvers which would

require the x2 setting in the fitted options. 4/ Select Station Coordinates (Home>Function>System Setup>Station Coordinates) and

ensure that latitude is in correct hemisphere (North or South). You only need to enter the

correct station co-ordinates if you intend to use IESS-412 or Norad ephemeris data. 5/ Select Date and Time (Home>Function>System Setup>Date & Time) and enter the correct

time and date (in UT (GMT)). This is only strictly necessary if you intend to use IESS-412 or

Norad ephemeris data, but most users prefer to set the time correctly anyway. 6/ Select beamwidth (Home>Function>System Setup>Az & El Beamwidth) and set the receive

3 dB beamwidths of your antenna. 7/ Now ensure drive direction feedback is correct.

Select Manual on INTRAC . (Home>New Mode>Manual/Stow) Note displayed Az angle.

Command drive Right. Check if displayed angle increases or decreases.

Command drive left. Check if displayed angle increase or decreases.

Continue driving left until displayed angle has returned to the previously noted angle.

The angle should have increased while driving right and decreased while driving left. If it did

the opposite then the resolver sense is not correct and will need correcting. By bringing the

antenna back to the original displayed angle we have maintained the angle reference.

Note the displayed Elevation angle and repeat the operation for Elevation. Commanding Up

should give an increasing angle, Down a decreasing angle. If you found the opposite then

you will need to change the elevation resolver sense. Make sure you return the antenna to

the same elevation position (reading). 8/ If either resolver senses required changing then Select Fine Tune (Home>Function>System

Setup>Fine Tune) and change the required senses on the first screen. Then press EN to

continue and adjust the fine tune offsets so that the angle display reads the correct angles (

the ones you noted in step 1). 9/ Now check that Manual drive drives the angles in the expected direction. At this point you

can also check that the physical direction on motion of the antenna is also correct, but this

will be correct if the original installation was correct. 10/ Connect the beacon signal.

If an IBR-L is fitted and an L-band beacon is available connect this to the RF input on the

rear panel of the INTRAC. Select the correct frequency and check that a valid beacon level

is displayed. Manually peak the antenna to maximize the beacon level and check that the

beacon does not overload (24.9 dB displayed).

INTRAC-305 QUICK START GUIDE

If an IBR-L is not fitted then provide a voltage signal to the beacon 1 input. You will need to adjust the potentiometers (See manual page 76) to set the gain and offset to the correct values. Manually peak the antenna to maximize the beacon level and check that the

beacon does not overload (24.9 dB displayed). 11/ Set any other parameters, such as Soft Limits. 12/ Select Auto-New Model (Home>New Mode>Auto New Model) and press enter. Monitor

system over 24 hours and check that system is maintaining track with displayed mode

“Learning”. Soon after the 24 hour learning period the mode should change to “Tracking”,

indicating that the system has successfully computed a full INTRAC model.

WARNING

POSSIBLE LETHAL POTENTIALS EXIST WITHIN THIS EQUIPMENT

THE COVERS SHOULD NOT BE REMOVED EXCEPT BY QUALIFIED PERSONNEL.

SWITCH OFF POWER AND ISOLATE SUPPLY BEFORE REMOVING COVERS.

IF IT IS NECESSARY TO OPERATE THE EQUIPMENT WITH THE COVERS

REMOVED FOR SERVICING PURPOSES ALL NECESSARY PRECAUTIONS

SHOULD BE TAKEN TO PROTECT AGAINST ELECTRIC SHOCKS

SAFETY INTRAC-305

1. SAFETY

ELECTRICAL Fusing The standard unit is protected by a user replacable fuse in the

live/phase power supply line.

Care should be taken to ensure that the power cable is

correctly connected to the power source such that the live/phase connection of the INTRAC is connected to the live/phase terminal of the supply.

When replacing the fuse be sure to do so with one of the

correct value and type.

The Dual Redundant power supply version is protected by

separate board mounted fuses on each power supply. These are not user replaceable.

Earthing It is important that the electrical supply has a good and proper

earth and that earth is connected through to the INTRAC-305 via the power cable.

Battery Disposal The processor board contains a Nickel Cadmium (NiCd) or

Lithium battery. These elements are toxic. The battery should be disposed of according to national requirements. DO NOT PLACE IN NORMAL GARBAGE OR IN A FIRE.

RF I/P Connector for IBR-L 18Vdc may be present on the inner of the N-Type connector

to power the LNB/BDC. This voltage can be removed by unplugging connector J41.

Emergency Stop There is a latching emergency stop switch on the INTRAC

front panel. Pressing this switch will remove power from the antenna drive motors and the INTRAC will enter Standby

Page 10 INTRAC-305 MANUAL - Issue 3.2 © Advantech AMT Ltd

mode. To restore drive the switch should be rotated clockwise (CW) and Auto Continue selected.

1

INTRAC-305 SAFETY

Facilities exist at the Motor Drive Cabinet for the connection

of external emergency stop switches. It is highly

recommended that those fitted be of the latching type. MECHANICAL Mounting The INTRAC-305 must not be mounted so that it is supported

only by the front panel. A proper rack mounting kit must be

used. This may be either of the fixed mounting type or the

sliding rail type.

EMC

The unit is designed to meet the requirements of the EC EMC

Directive and conforms to the relevant standards for EMC

emissions and immunity. Important To ensure that an INTRAC installation also complies with the

EMC Directive it is important to make all interconnections

between the INTRAC-305 and associated equipment using

good quality screened cables as recommended in the

appropriate sections of this manual.

2

INTRAC-305 SPECIFICATION & OPTIONS

2. SPECIFICATION & OPTIONS

The following pages contain the specification of the INTRAC-

305, a list and description of the available options and a chart

of the delivered configuration.

Required Mechanical Characteristics of the Antenna System

To enable the full tracking performance of the INTRAC-305

the antenna system must conform to certain overrun and

tracking constraints. The tracking drive speed must be less than 1/10 of the

antenna beamwidth per second and the overrun (drift) when

power is removed from the motors must be less than 1/

the beamwidth. If the system does not conform to these requirements please

consult with Advantech AMT Limited.

20

of

SPECIFICATION & OPTIONS INTRAC-305

SPECIFICATION

Tracking Accuracy Typically <0.1dB RMS signal degradation after tracking for

30minutes (with tracking signal).

Prediction Accuracy Typically <0.1dB RMS signal degradation over 72hrs (after

loss of tracking signal).

Tracking Signal May be derived from an external tracking receiver or from the

(optional) Integral Beacon Receiver (IBR-L).

External DC voltage varying directly with received signal strength (in dB). Scale factors between 0.1V/dB and 1.0V/dB can be

preset with up to  10V offset.

Internal Internal IBR-L requires an L-band signal with a level in the

range -80dBm to -45dBm and C/No >40dB. Stability better than  150KHz. The received frequency is selected from the INTRAC front panel.

The signal voltage and lock lost indicators are generated

internally.

Antenna Position Encoders Single resolver units. Operating frequency is 800Hz nominal. Az & El The INTRAC-305 is designed to operate directly with

standard Andrew resolvers. Antennas used with the APC300 controller, for which the INTRAC-305 is a replacement, are normally fitted with x2 resolvers. The part numbers of the two (alternative manufacturers) 2x resolvers known to have been used by Andrew are:

Harowe 11BRCX-310-M-85V Clifton 11-BHM-19F/F776

The INTRAC-305 can be configured (by the user in “Fitted

Options”) to operate with the lower resolution (x1) resolver

that may be fitted to antennas intended for APC100 control. The part numbers of the two (alternative manufacturers) 1x resolvers known to have been used by Andrew are:

Harrowe 11_BRCX-310-R-85V Clifton 11-BHW-46TK/F561 or F817

Pol The standard version of the INTRAC-305 is firmware

configured for x1 resolvers. Firmware to enable the use of a x2 resolver for can be provided on request.

2

INTRAC-305 SPECIFICATION & OPTIONS

Position Offset The indicated pointing angles can be electrically offset in all

axes to an accuracy of 0.01 to compensate for angular

mounting offset in the position encoders.

Back-up Time is maintained by a battery backed clock. Operating

parameters, data and orbital models are held in EEPROM.

Outputs Antenna drive. Emergency Stop contacts. Alarm contacts.

Dimensions 483mm Wide x 132mm High x 406mm Deep. (19” rack x 3U). Mounting Standard 19” rack mounts or rails. DO NOT MOUNT BY FRONT PANEL LUGS ALONE THE UNIT MUST BE SUPPORTED ALONG ITS SIDES.

Weight 12kg (without IRB-L). 15kg (with IRB-L).

Operating Temperature 0C - 40C.

Relative Humidity 10% - 90% non-condensing.

Power 220V - 240V 50Hz 50W.

110V - 120V 60Hz 50W. Power supplies are auto-switching

Country of Origin United Kingdom.

RS423

RS422

Ribbon

Cable

Position

Link

Position

Ribbon

Cable

Position

Link

Position

Test Port 1

Test Port 2

J12

J11

J44 Front

J46 Front

J15

J14

J44 Rear

J46 Rear

Serial Port Configuration - Connector and Link Positions

Port Designation

SPECIFICATION & OPTIONS INTRAC-305

OPTIONS A number of options are available for the INTRAC-305.

The options are described in the following pages. Some of

these options require changes to the firmware or hardware and some are only available when ordered at the time of initial order.

Serial Interfaces only need a change to switch and / or

connector positions within the INTRAC.

Voltage The power supply unit (or units for Dual Redundant PSU

option) of the INTRAC-305 auto switch for nominal mains voltages of 110Vac or 220Vac.

Tracking Signal The INTRAC-305 can be supplied with an integral L-band

beacon receiver (IBRL). Alternatively a voltage, from an external receiver, which varies directly with the received signal strength in dB may be used. The IBRL option should be specified at time of initial order.

Serial Interfaces There are three communication ports on the INTRAC-305,

“Remote Port”, “Test Port 1” and “Test Port 2”. The Remote

Port is configured for RS232/RS423. Test Ports 1& 2 can be independently configured as either RS423 or RS422.

This involves connecting the rear panel connectors to the

appropriate connectors on the main board and setting the option links as shown below.

Polarisation If the antenna has motorised polarisation the INTRAC can be

user configured to control the polarisation angle. Polarisation uses the standard Andrew polarisation resolver.

Note The standard version of the INTRAC-305 is firmware

configured for a Pol resolver geared 1:1 to the polarisation tube. Firmware for a Pol resolver geared 2:1 to the polarisation tube is available if required. Note this is a

2

INTRAC-305 SPECIFICATION & OPTIONS

firmware change and required the EPROM on the interface

card to be changed.

Mount Type Two types of antenna mount may be used with the INTRAC.

An Az/El mount or a Polar mount. The appropriate one is

selected in “Fitted Options” as AZ/El or Hr-Ang/Declination.

Resolver Type The INTRAC-305 is intended for use with standard Andrew

resolvers, either x2 or x1 versions. Normally the INTRAC-305

is to replace an Andrew APC300 and the antenna will have

been fitted with x2 resolvers. Refer to the earlier specification

section. This is a user configuration option.

Stow Option There is provision in the INTRAC-305 configuration for Az/El

preliminary and final stow positions to be set. The “Stow” command causes the antenna to be driven to the

preliminary position in both axes. Once at this position the

antenna is driven to the final position. The “Unstow” command causes the pin(s) to be removed

(where appropriate) and the antenna driven to the preliminary

position. The preliminary and/or final positions can be set to “not-

used” for one or both axes.

Dual Redundant PSU The INTRAC-305 can be supplied with dual redundant power

supplies. In this option the single PSU is replaced by two indepenent PSUs and associated combining hardware. Independent switched power inlets are provided and the front panel power switch is replaced by status LEDs. The INTRAC-305 will operate normally when either or both PSUs are operational. This option must be requiested at time of initial order

Deliberately blank

SPECIFICATION & OPTIONS INTRAC-305

3

POWER

CONTROL

SYSTEM ALARM

MANUAL +ENTER

0

4

7

1 5 8 2 3 6 9

Intrac Antenna Controller

INTRAC 305

EMERGENCY

STOP

LCD DISPLAY PANEL

ON/OFF SWITCH

NUMERIC KEYPAD

EMERGENCY STOP

BUTTON

SYSTEM ALARM

INDICATOR

MENU KEYS

MANUAL CONTROL KEYS

(STATUS LEDS on DUAL PSU unit)

INTRAC-305 OPERATION

3. OPERATING THE INTRAC-305 The INTRAC-305 may be operated directly from the front

panel or from the (optional) Remote Control and Monitoring

Terminal. For both methods of operating a series of menus enables a

user to program the INTRAC and to invoke its modes of

operation. Operation from the front panel is described in this section of

the manual. The (optional) remote terminal (the RCM-4) is

described in the appendices.

FRONT PANEL

LCD Display Panel This displays the current status of the INTRAC-305 and the

selected menu which includes the labels for the menu keys. Menu Keys These six keys have functions dependant on the selected

menu. The right side of the menu display indicates the

function of each key for that menu. Numeric Keypad The keypad is used to enter or edit data into the INTRAC.

The  &  keys move the cursor left and right. The +/- key is used to change the sign or, in some cases to

insert a space character. Manual Control Keys For manual control of the antenna pointing when the INTRAC

is in manual mode. System Alarm Indicator Illuminates when a primary alarm occurs and remains on until

the cause of the alarm is cleared. Note. An active primary alarm disables antenna drive.

MODELS

RAPID MODEL GENERATE

PROGRAM TRACK

RESERVE MODEL

EDIT IESS-412

EDIT NORAD

EDIT STAR TRACK

EDIT SATELLITE

CONFIGURATION

EDIT SATELLITE

BEACON FREQUENCY

SYSTEM SETUP

FINE TUNE

STATION COORDINATES

DATE & TIME

AZ& EL BEAMWIDTH

CONTRAST & BRIGHTNESS

STOW SETUP

FITTED OPTIONS

selected by menu list

SOFT LIMITS

EXTENDED AZ not avail

DIAGNOSTICS OFF

BEACON THRESHOLD

DIAGNOSTICS ON

CLEAR MODELS

HOME

NEW MODE

FUNCTION

ALARMS

MANUAL/

GOTO

AUTO CONTINUE

AUTO NEW MODEL

STANDBY

STOW

SEARCH

GOTO SATELLITE

GOTO POSITION

BEACON POL not avail

REMOTE LOCAL

OPERATION INTRAC-305

Emergency Stop Button Pressing the button removes all drive from the antenna. The

button locks in the safe position when pressed. To enable drive to return to the antenna the button must be rotated clockwise until it releases.

On/Off Switch Illuminated rocker switch to apply power to the INTRAC-305.

Illuminated when the INTRAC is on. On Dual Redundant PSU units the rocker switch is replaced by status LEDs.

Dual Redundant Status Leds On Dual Redundant PSU units there is a green and red status

LED for each PSU. Green indicates that the PSU is powered and working normally. Red indicates thjat the PSU is powered but faulty. When the PSU is unpowered both LEDs will be off. The INTRAC will operate correctly when at least 1 green LED is illuminated.

THE MENU STRUCTURE

The diagram above shows the various menus in a “tree”

The menu headings in heavy type are selected by the six

structure.

menu keys from the “HOME” menu. The headings in the box

below “NEW MODE” are selected by the menu keys in NEW

MODE. The shaded area headings are sub menus of the MODELS, CONFIGURATION and SYSTEM SETUP menus.

They are accessed by using the “Next Field” menu key from

the appropriate menu followed by the “ENTER” key on the

numeric keypad.

3

INTRAC-305 OPERATION

Example To select “STOW SETUP” from the HOME menu :-

FUNCTION (menu key) SYSTEM SETUP (menu key) NEXT FIELD (menu key) press five times. ENTER (numeric keypad)

THE MENU SCREEN

A typical menu display screen is shown above. In this

example it is the “Goto Position” used to drive the antenna to

a particular pointing angle. The top section shows the current mode of the INTRAC,

whether the control is remote or local and the various pointing

angles of the antenna. Note On some screens (e.g., HOME) the current status display

expands to fill the lower part of the screen. Down the right side of the screen are the current functions of

the six menu keys. Above the key labels is the menu type designator, i.e., one of

the six main menu headings. The main part of the display relates to the selected menu. The individual menus are described on the following pages in

order of the menu tree shown above. The order is from left to

right and taking the branches as they come.

OPERATION INTRAC-305

On the next page is an alphabetical index of the menus to

assist in the quick location of a specific function.

ALPHABETICAL INDEX OF MENUS

Alarms ...................................................................... 48

Auto Continue ...................................................................... 21

Auto New Model ...................................................................... 22

Az & El Beamwidth ...................................................................... 36

Beacon Frequency ...................................................................... 24

Beacon Threshold ...................................................................... 29

Beamwidth Az & El ...................................................................... 36

Brightness & Contrast ...................................................................... 30

Clear Models ...................................................................... 47

Configuration ...................................................................... 23

Contrast & Brightness ...................................................................... 30

Date & Time Setting ...................................................................... 34

Diagnostics On/Off ...................................................................... 28

Edit IESS-412 ...................................................................... 43

Edit NORAD ...................................................................... 44

Edit Satellite Table ...................................................................... 25

Edit Star Track ...................................................................... 45

Fine Tune Offsets ...................................................................... 32

Fine Tune Sense ...................................................................... 31

Fitted Options ...................................................................... 39

Function ...................................................................... 23

Goto Position ...................................................................... 18

3

INTRAC-305 OPERATION

Goto Satellite ...................................................................... 20

Home ...................................................................... 14

IESS-412 Edit ...................................................................... 43

Local/Remote ...................................................................... 49

Manual/Stow ...................................................................... 17

Models ......................................................................40 to 47

New Mode ...................................................................... 16

NORAD Edit ...................................................................... 44

Program Track ...................................................................... 41

Rapid Model Generate ...................................................................... 40

Remote/Local ...................................................................... 49

Reserve Model ...................................................................... 42

Satellite Table Edit ...................................................................... 25

Search ...................................................................... 19

Select Stow Use ...................................................................... 38

Show Alarms ...................................................................... 48

Standby ...................................................................... 15

Star Track Edit ...................................................................... 45

Station Co-ordinates ...................................................................... 33

Soft Limits ...................................................................... 26

Stow ...................................................................... 17

Stow Set-up ...................................................................... 37

System Set-up ......................................................................30 to 39

Time Rate Correction ...................................................................... 35

Time Setting ...................................................................... 34

X2 Setup …………………………………………………… 27

1

2

3

4

5

6

moves to the New Mode menu (not available when in remote Control Mode)

moves to the 1st ‘Function’ menu(not

available when in remote Control Mode)

shows the Alarms menu ie the currently active alarms

toggles the INTRAC between Remote and Local control modes

Home

Function

Standby

(not used)

Show Alarms

New Mode

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Local

Current Mode

Select Remote

OPERATION INTRAC-305

HOME

Path HOME Note This menu can be reached directly from almost every menu

by pressing Menu Key 2.

Description This is the root Menu as shown in the menu structure diagram

on page 10.

It is from here that the five main menus are accessed directly

by use of the Menu Keys.

3

1

2

3

4

5

6

moves to the New Mode menu (not available when in remote Control Mode)

Standby

New Mode

puts the antenna control system into STANDBY mode

Local

Current Mode

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Select Remote (Local)

Function

Show Alarms

moves to the 1st ‘Function’ menu(not

available when in remote Control Mode)

shows the Alarms menu ie the currently active alarms

toggles the INTRAC between Remote and Local control modes

Home

INTRAC-305 OPERATION

STANDBY

Path STANDBY Note This menu can be reached directly from almost every menu

by pressing Menu Key 1.

Description Standby is a monitoring but no movement mode. The antenna is not driven in this mode but its position and the

beacon signal strength are monitored and displayed. External inputs are also monitored and any appropriate

alarm(s) become active. The System Alarm indicator will

illuminate and the alarms may be viewed by pressing “Show

Alarms”.

Standby mode is entered in one of three ways :  by being selected by the operator using Menu Key 1.  by a primary alarm becoming active.  at the end of a Goto move or at the end of a search.

1

2

3

4

5

6

moves to the Manual/Stow menu

moves to the 1st ‘Goto’ menu ie Goto

Position

resumes tracking using the INTRAC’S

current model

clears the INTRAC’S current model and

starts learning a new model

New Mode

Auto New Model

Goto

Standby

Auto Continue

Manual /Stow

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Local

Current Mode

Home

skips to the Home (root) menu

OPERATION INTRAC-305

NEW MODE

Path Menu key 3 from the “HOME” or “STANDBY” menus. Description Displays the current mode and antenna pointing angles on

the full screen. This is the entry menu for moving the antenna. Menu key 3 leads to the Manual antenna control and antenna

stow menu. Menu key 4 leads to the “Goto” menu for “Goto Position”,

“Goto Satellite” and “Search”. Menu key 5 resumes tracking using the current model.

(Assuming that there is a valid model). Menu key 6 clears the existing model and starts learning a

new model for the satellite at the current pointing.

3

1

2

3

4

5

6

moves to the New Mode menu (not available when in remote Control Mode)

Stows or Unstows (toggle) the antenna depending on its current state

(toggle) selects whether manual control buttons drive Az/El or Pol axes

latches the currently operated Manual Drive button until pressed a second time

Manual

Latch Drive

Stow/ Unstow

Standby

skips to the Home (root) menu

Select Az&El or Pol

New Mode

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Local

Current Mode

Home

INTRAC-305 OPERATION

MANUAL/STOW

Path HOME - NEW MODE - MENU KEY 3 Description Manual This menu screen enables the antenna pointing direction to

be changed manually by use of the Manual Control Keys on the front panel. Menu key 5 enables either azimuth & elevation or the polarisation motors to be driven.

Azimuth is driven by the left and right manual keys. Elevation is driven by the upper and lower manual keys. Polarisation is driven by the left (ccw) and right (cw) manual

keys.

Menu key 6 latches which ever manual key is pressed and

drives at an increased speed. (useful for large distance moves) Pressing key 6 again releases the latching effect.

Stow Menu key 4 (alternate functions) causes the antenna to be

driven to the pre-set stow position (via the preliminary stow position) and, where appropriate, the stow pins to be driven into locking position.

If the antenna is “stowed” key 4 causes the stow pins to be

withdrawn, where appropriate, and the antenna to drive to the

preliminary stow position. (see Stow Setup) Notes The Drive Fail alarm does not work in Manual (P) mode. The antenna may be driven through azimuth 0 (North) in

Manual (P) mode is local (front panel) control as opposed to

Manual (P) mode (azimuth 180 [South] in Southern

Hemisphere).

remote manual control which is Manual (A) Mode.

El Angle

Az Angle

Pol Angle

Beac Freq MHz

1

2

3

4

5

6

skips to the New Mode menu

skips to the Search menu

skips to the Goto Satellite menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Mode

Press EN to go to position

Next Field

Search

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Goto Satellite

New Mode

OPERATION INTRAC-305

GOTO (Position)

Path HOME - NEW MODE - MENU KEY 4 Note Pressing menu key 4 (Goto) on the New Mode menu leads to

the Goto Position (as opposed to Goto Satellite) menu. Goto Satellite and Search are accessed from this (Goto Position) menu by Menu Keys 5 and 4 respectively.

Description Used to drive the antenna to the co-ordinates displayed. The co-ordinates can be set by using menu key 6 (Next Field)

to step through the three angles and the Beacon Frequency. The co-ordinate enclosed in the box can be edited from the numeric keypad. The  &  keys are used to move the cursor to the desired character.

Pressing the ENTER key causes the antenna to commence

driving to the set co-ordinates. When the antenna reaches the position the INTRAC enters STANDBY Mode.

3

1

2

3

4

5

6

skips to the Goto Position menu

(not used)

skips to the Goto Satellite menu

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

moves the highlight box to the next field in the current menu

SEARCH

Nom. Angle Box Size

El -027.334 2.0

Az 178.550 2.0

Dwell Time 25secs

Beac Freq 12.250500GHz

Press EN to begin search

Mode

Current Mode Tracking Control State Local Beac Freq 11.500000GHz El Angle 25.55 Az Angle 235.45 Pol Angle 25.63

Next Field

Goto Satellite

Goto Position

Standby

Home

INTRAC-305 OPERATION

SEARCH

Path HOME - NEW MODE - GOTO (Position) - MENU KEY 4

Description Used to search a specific area of sky for the strongest signal

on the beacon frequency. The antenna may be driven to the nominal co-ordinates of the

required satellite by either the Goto Position or Goto Satellite

commands or manually. Alternatively the Az & El co-

ordinates can be entered on this screen. Using Menu Key 6 (Next Field) and the numeric keys the

satellite's position and beacon frequency may be entered. The search box size and the antenna dwell time are also

entered in the same manner. The box size parameters are either side of the nominal angle

thus entering 2 will cause a 4 scan. The dwell time is the time that the antenna will remain at each

step. It is the lock time of the beacon receiver. For the IBR-L

(The Signal Processors supplied Integrated Beacon Receiver)

the default dwell time of 25 seconds is correct. Once all the co-ordinates are set pressing ENTER will start

the search. The antenna will drive to the nearest corner of

the search box before commencing the search pattern.

El Angle 145.50

o

Az Angle 210.50

o

Pol Angle -134.5

o

Band 1 Beac Freq 950.000000 MHz

1

2

3

4

5

6

skips to the Goto Position menu

skips to the Search menu

skips to the Edit Satellite Table menu

recalls and displays the satellite table data of the satellite whose number is indicated in the highlight box

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Mode

Press EN to go to Satellite

Recall Satellite Data

Search

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Edit Satellite Table

Goto Position

OPERATION INTRAC-305

GOTO SATELLITE

Path HOME - NEW MODE - GOTO (Position) - MENU KEY 5

Description The INTRAC-305 can store the co-ordinates, polarisation

angle and beacon frequency of 40 satellites. With this screen the antenna can be driven to any satellite whose parameters have been stored.

When this screen is accessed the displayed parameters refer

to the current satellite.

To move to a new satellite key in the required satellite’s

number using the numeric keypad. (Press Menu Key 6 to view the stored parameters if required)

Press ENTER and the antenna will drive to the new satellites

co-ordinates. Select Home (Menu key 2) to leave this menu without moving to a new satellite.

If the satellite’s parameters need to be changed Menu Key 5

switches to the Edit Satellite screen. For an explanation of that facility see “Edit Satellite Table”.

Menu key 6 is used to view the data of a satellite after

entering the “Number”.

3

1

2

3

4

5

6

moves to the Manual/Stow menu

moves to the 1st ‘Goto’ menu ie Goto

Position

resumes tracking using the INTRAC’S

current model

clears the INTRAC’S current model and

starts learning a new model

New Mode

Auto New Model

Goto

Standby

Auto Continue

Manual /Stow

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Local

Current Mode

Home

skips to the Home (root) menu

INTRAC-305 OPERATION

AUTO CONTINUE

Path HOME - NEW MODE - MENU KEY 5

Description This facility does not have a screen of its own. It is a function

If the INTRAC had been in Learning or Tracking mode and

The antenna may have been stowed or moved off satellite for

If the INTRAC had been Tracking but the time off satellite was

Note Until and unless the orbit model is cleared pressing Auto

(see Auto New Model on the next page)

enabled by a menu key on the New Mode menu.

had been taken out of that mode, and the model was still

valid, pressing Auto Continue will return the INTRAC to that

mode.

some other reason. Alternatively the INTRAC may have gone

into Standby due to an alarm. In either case (once the

antenna has been unstowed) pressing Auto Continue will

cause the antenna to drive back to the satellite and continue

Learning or Tracking.

too long for the model to be relied on it will restart in Learning

mode to build a new model.

Continue will cause the antenna to be driven to the satellite of

that model. Thus if a new satellite is required to be tracked

the antenna must be driven to that satellite’s location and

“Auto New Model” used to cause the INTRAC clear the

existing model and start to build a new one.

1

2

3

4

5

6

moves to the Manual/Stow menu

moves to the 1st ‘Goto’ menu ie Goto

Position

resumes tracking using the INTRAC’S

current model

clears the INTRAC’S current model and

starts learning a new model

New Mode

Auto New Model

Goto

Standby

Auto Continue

Manual /Stow

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Local

Current Mode

Home

skips to the Home (root) menu

OPERATION INTRAC-305

AUTO NEW MODEL

Path HOME - NEW MODE - MENU KEY 6

Description This facility does not have a screen of its own. It is a function

enabled by a menu key on the New Mode menu.

Auto New Model is used when it is required to track a new

satellite. It causes the INTRAC to clear the existing model (if there is one) and start to build a new model of the orbit of the satellite whose beacon signal it is receiving.

Thus before pressing the Auto New Model key the antenna

must be peaked on the required satellite’s main transmission

lobe. The peaking may be done in manual mode or automatically using Search Mode.

On pressing Auto New Model the INTRAC will enter Learning

mode. After 24hrs of learning the orbit and building the model the INTRAC will enter Tracking mode.

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

controls whether ‘Angles’ or ‘Diagnostics’ appear on Test Port 1

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Standby

Home

Models

Test Port-1 Diags

System Setup

Function

Press EN to accept selection

Next Field

> Beacon Pol not avail < Beacon Frequency Edit Satellite Table

Soft Limits x2 Setup Diagnostics On Diagnostics Off Beacon Threshold

INTRAC-305 OPERATION

FUNCTION (Configuration)

Path HOME - MENU KEY 4 Note There are three separate menus under the FUNCTION

This Configuration menu can also be reached by Menu Keys

Description The Configuration menu contains seven sub menus plus

The sub menus are described on the following pages. The Diagnostics On & Off keys are used to route the INTRAC

WHEN IT IS REQUIRED TO CONTROL THE INTRAC FROM

Menu Key 4 Test Port - 1 Diags (Angles) The data available at Test Port - 1 is either INTRAC

heading. Pressing Menu Key 4 (FUNCTION) on the “Home“

menu leads to the CONFIGURATION menu from which the

MODELS menu and the SYSTEM SETUP menu are reached

via Menu Keys 3 & 5 respectively.

from the MODELS & SYSTEM SETUP menus

Diagnostics On & Off.

diagnostic data to the Remote Control port. This facility

enables one PC to be used as both the remote control

terminal and the diagnostics receiving terminal. However it

cannot do both at the same time.

THE REMOTE TERMINAL DIAGNOSTICS MUST BE

SWITCHED OFF.

diagnostic data (the same diagnostic data as mentioned

above) or angles data. Selection between these two is by

Menu Key 4 whose label toggles between “Diags” & “Angles”

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Function

Press EN to accept selection

Next Field

Frequency: MHz Band No : 4

1 L 945 to 1750 MHz 2 C 3.7 to 4.2 GHz 3 X 7.07 to 7.87 GHz 4 Ku1 10.95 to 11.70 GHz 5 Ku2 11.70 to 12.20 GHz 6 Ku3 12.55 to 12.75 GHz 7 Ku4 12.25 to 12.75 GHz

OPERATION INTRAC-305

BEACON FREQUENCY

Path HOME - FUNCTION - MENU KEY 6 - ENTER Description This function effects the tuning of the IBR-L (if fitted) to the

beacon frequency of the satellite to be tracked.

The IBR-L operates over the frequency range 945MHz to

1.75GHz (L-band). A block down converter is required to convert the actual beacon frequency to the L-band range.

Note The conversion from the operating frequency to the L-band

frequency for the IBR-L is performed automatically for BDCs with standard local oscillator frequencies.

Setting Frequency Menu Key 6 (Next Field) selects either the Frequency or Band

No. for editing. The Band No. must be set first otherwise the frequency cannot be entered.

Use the numeric keypad to overwrite the band number and/or

frequency as required. The down conversions assumed by the INTRAC-305 are : Band No. Conversion

1 none 2 5.15GHz - C band 3 X band - 6.3GHz 4 Ku1 band - 10GHz 5 Ku2 band - 10.75GHz 6 Ku3 band - 11.475GHZ 7 Ku4 band - 11.3GHZ

Notes Whilst bands 6 & 7 cover, in part, the same frequency range

To use an X-band frequency below 7.25GHz an IBR-L with an

the down conversion frequency is different.

extended low frequency range is required.

3

Satellite Number 01 Elevation 33.74

o

Azimuth 162.83

o

Polarization - 90.0

o

Band 1 Frequency 950.000000 MHz

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Function

Press EN to accept selection

Next Field

INTRAC-305 OPERATION

EDIT SATELLITE TABLE

Path HOME - FUNCTION - MENU KEY 6 (X2) - ENTER or From Models or System Setup:-

CONFIG - MENU KEY 6 (X2) - ENTER

Description The INTRAC-305 can store bearing parameters for 40

satellites.

This function allows the editing of previously stored data

and/or the addition of new data.

Menu Key 6 steps the edit box through the six fields. Using

the numeric keypad enter the satellite’s parameters and the

number it is to be stored under. Pressing ENTER sets the new values. Note 1 The Satellite Number must be between 1 and 40 inclusive. Note 2 If the frequency is between 12.55GHZ and 12.75GHZ ensure

that the correct band number is set for the down converter

frequency, i.e., band 6 or band 7. (see previous page - Beacon Frequency)

To view the data relating to a satellite number use the Goto

Satellite menu, page 22.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Function

Press EN to accept all fields

Azimuth left(CCW) 95.00

O

Azimuth right(CW) 160.00

O

Elevation Lower -5.00

O

Elevation Upper 99.99

O

Polarization(CCW) -110.00

O

Polarization(CW) 6.00

O

skips to the Home (root) menu

skips to the Config menu

skips to the System Setup menu

Config

System Setup

moves the highlight box to the next field in the current menu

skips to the Models menu

Models

Next Field

OPERATION INTRAC-305

SOFT LIMITS

Path HOME - FUNCTION - MENU KEY 6 (x3) - ENTER or From Models or System Setup :-

CONFIG - MENU KEY 6 (x3) - ENTER

Description Antenna movement limits may be programmed which will stop

the antenna drive (and raise a primary alarm) if any one of them is reached.

Note 1 These are software limits they do not physically break

the drive circuits to the antenna motors.

Note 2 DRIVE IN MANUAL MODE IS NOT INHIBITED BY THE

SOFT LIMITS.

Setting Menu Key 6 (Next Field) steps the edit box through the six

fields. Data is overwritten with the numeric keypad. Pressing ENTER accepts all the fields.

3

X2 resolvers have a 1:2 gearbox on the input shaft

to provide extra resolution. This screen allows the user

to resolve a +/- 180º ambiguity in the displayed main axes angles.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

sets the offset for the X2 resolver

clears the offset for the X2 resolver

(not used)

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Standby

Home

Set Offset

Function

Press EN to accept selection

Clear Offset

X2 RESOLVER SETUP

INTRAC-305 OPERATION

X2 SETUP

Path HOME - FUNCTION - MENU KEY 6 (x4) - ENTER or From Models or System Setup :-

CONFIG - MENU KEY 6 (x4) - ENTER Note This function is only available if the “Resolver Type” in

System Setup - Fitted Options has been set to “EG-01 Fitted”. If the “Extended Az” in System Setup - Fitted Options has

been set to “Fitted” this line of the Configuration menu reads

“Extended Azimuth Setup”. (see previous page)

Description The EG-01 resolvers have a 1:2 gear ratio between the input

shaft and the angle data output. This is in order to achieve

higher resolution. However it means that the output moves

through 720 for 360 of input rotation. Thus in Azimuth the

INTRAC seeks to initially resolve this 180 ambiguity.

1

2

3

4

5

6

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Standby

Home

Models

Test Port-1 Diags

System Setup

Function

Press EN to accept selection

Next Field

Beacon Frequncy

Edit Satellite Table Soft Limits Extended Azimuth Setup

> Diagnostics On <

Diagnostics Off Beacon Threshold

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

selects whether ‘Angles’ or ‘Diagnostics’

appear on Test Port 1

skips to the System Setup menu

moves the highlight box to the next field in the current menu

OPERATION INTRAC-305

DIAGNOSTICS ON / DIAGNOSTICS OFF

Path HOME - FUNCTION - MENU KEY 6 (x5 for ON) (x6 for OFF) - ENTER

or From Models or System Setup CONFIG - MENU KEY 6 (x5 or 6) - ENTER

Description Diagnostics On & Off are used to route the INTRAC

diagnostic data to the Remote Control port.

Use Menu Key 6 to step the highlight bar to the ON or OFF

line and press ENTER to set.

Note This facility enables one PC to be used as both the remote

control terminal and the diagnostics receiving terminal. However it cannot do both at the same time.

WHEN IT IS REQUIRED TO CONTROL THE INTRAC FROM

THE REMOTE TERMINAL DIAGNOSTICS MUST BE SWITCHED OFF.

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

(not used)

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Function

Set Level: -14.12 dB

Press EN to accept selection

INTRAC-305 OPERATION

BEACON THRESHOLD

Path HOME - FUNCTION - MENU KEY 6 (x8) - ENTER or From Models or System Setup

CONFIG - MENU KEY 6 (x8) - ENTER

Description On this screen the beacon signal strength at which the

beacon level alarm trips is set. If the tracking signal level falls below the value set here the

INTRAC-305 considers the tracking signal receiver to have

lost lock on the beacon. Edit the value in the “Set Level” box using the numeric

keypad. The  &  move the cursor. Note The only function of the beacon level alarm is to operate a

relay for external use. It is not used by the INTRAC algorithm

and, when it occurs in isolation without an alarm from the

IBR-L, has no effect on the INTRAC operation or mode.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

adjusts contrast of LCD display panel

adjusts brightness of LCD display panel

restores factory defined baseline settings

moves the highlight box to the next field in the current menu

Standby

Home

Contrast adjust

Bright adjust

Normal

Function

Press Enter to store values

Next Field

OPERATION INTRAC-305

CONTRAST & BRIGHTNESS

Path HOME - FUNCTION - SYSTEM SETUP - ENTER or From Models or Configuration

SYSTEM SETUP - ENTER

Description The screen Contrast and Brightness can be adjusted in this

menu.

The Contrast range is from 0 to 15 and the Brightness range

is from 0 to 8.

The levels are set using Menu Key 3 for contrast and Menu

Key 4 for brightness.

Each press of a key increases the displayed number by one

and the screen brightness or contrast changes.

When the display is at its most visible press ENTER to store

the values.

Menu Key 5 (Normal) sets the Brightness and Contrast to the

default values which are 8 in both cases.

Note The Flicker setting is not an operator controllable parameter.

3

Resolver Sense: Azimuth >true< Elevation inv Pol Angle inv

1

2

3

4

5

6

(not used)

toggles the highlighted parameter

between ‘true’ and ‘inv’

(not used)

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Function

Press EN to accept sense settings

Next Field

Change Resolver Sense

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

INTRAC-305 OPERATION

FINE TUNE - sense

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x2) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x2) - ENTER

Description This menu allows the “sense” of the Azimuth, Elevation and

Polarisation resolvers to be inverted. This is necessary to

allow for different mounting arrangements for the resolvers. Use Menu Key 6 to step the edit highlight through the three

angles. Use Menu Key 4 (Change Resolver Sense) to toggle

between “true” and “inv.” Pressing ENTER accepts the settings and moves on to the

“FINE TUNE - Offsets” menu. (see next page)

Resolver Sense: Azimuth >true< Elevation inv Pol Angle inv To change offsets: Press the manual drive keys

(with FAST key if reqd) to adjust the displayed angle

1

2

3

4

5

6

(not used)

Toggles between ‘Select Pol Axis’ & Select Az/El Axes’ moving the highlight

box to the labeled parameter

speeds up the effect of the currently pressed manual Drive Key

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Select Pol Axis

Function

Press EN to EXIT Fine Tune

FAST

OPERATION INTRAC-305

FINE TUNE - Offsets

Path See “FINE TUNE - Sense” on previous page. Description This menu allows an offset to be inserted between the “angle”

from the resolver and the displayed angle in order to calibrate the system for any difference between the actual antenna angle and the resolver angle.

The actual pointing angles of the antenna are accurately

established and the displayed angles are set to those angles using this facility.

Azimuth & Elevation or Polarisation are selected using menu

key 5.

The setting of the offset is done using the manual drive keys.

For Az & El the right and left keys offset the Az and the upper and lower keys offset the El. For Pol the right and left keys are used.

The angles displayed in the upper section of the menu screen

change in real time. Menu Key 6 may be used together with

the direction key to increase the rate of change. The actual amount of offset is not displayed. The offset can be returned to zero for any angle by pressing

the opposite keys at the same time. Care should be taken to release both keys at the same time

otherwise another offset will be inserted. Note This should only be carried out at commissioning or on the

Caution Inserting any offset will reset the orbit model.

installation of a new resolver or if the relationship between the

antenna and a resolver has changed.

3

1

2

3

4

5

6

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Function

Press EN to accept selection

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Lat : -123.1234 o+North Long : 123.1234 o East Height: +10.0000 km Offsets Az : -180.1234

o

El : -180.1234

o

skips to the Config menu

skips to the System Setup menu

Config

System Setup

moves the highlight box to the next field in the current menu

skips to the Models menu

Models

Next Field

INTRAC-305 OPERATION

STATION CO-ORDINATES

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x2) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x2)

Description The co-ordinates of the earth station are entered in this menu.

Also any offsets required if the antenna base is not perpendicular.

The five edit fields are stepped through using Menu Key 6

(Next Field). The values are entered using the Numeric Keypad.

Pressing ENTER accepts the values.

Note These parameters are not required by the INTRAC-305 for its

orbit modelling. However they are required if IESS-412 or NORAD Ephemeris data is to be used and for Star Track Mode.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

moves to the Time Rate Correction menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Standby

Home

Time Rate Corr.

Config

System Setup

Function

Press EN to accept all fields

Next Field

Year : 97 Month : 12 Day : 25 Hour : 11 Minute: 35 Second: 10

OPERATION INTRAC-305

DATE & TIME

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x3) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x3) - ENTER

Description The date and time are entered in this menu. The edit box is stepped through the six fields using Menu Key

6 (Next Field). The values are entered using the Numeric

Keypad. The clock uses the 24hr system. Pressing ENTER accepts the values displayed.

Note 1 The clock is battery backed. Note 2 The clock frequency can be adjusted by up to +/- 180

seconds per day in the “Time Rate Correction” menu which is

accessed by Menu Key 3. (see next page)

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Config

Function

Press EN to accept selection

skips to the Home (root) menu

Models

(not used)

Seconds/Day: 045

System Setup

INTRAC-305 OPERATION

TIME RATE CORRECTION

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x3) - ENTER - MENU KEY 3

Description Allows the time keeping accuracy of the clock to be adjusted. The adjustment is in the range from minus 180 seconds per

day to plus 180 seconds per day,

Use the Numeric Keypad to enter the value. The +/- key is

used to set gain or loss.

Pressing ENTER accepts the displayed value.

Note Changing the Time Rate Correction value does not affect the

orbit model.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Next Field

Function

Azimuth B/width 0.14

o

Elevation B/width 0.14

o

Press EN to accept selection

OPERATION INTRAC-305

AZ & EL BEAMWIDTH

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x4) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x4) - ENTER

Description This menu enables the setting of the antenna’s Azimuth and

Elevation 3dB beamwidths at the beacon frequency. These values are used by the INTRAC-305 to calculate the

cross scan movement. The edit box is stepped between Azimuth and Elevation with

Menu Key 6 (Next Field). The beamwidth values are entered

from the Numeric Keypad. Pressing the ENTER key accepts the displayed values.

3

1

2

3

4

5

6

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Function

Press EN to accept settings

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Stows (or Unstows) the antenna

(not used)

Stow/ Unstow

moves the highlight box to the next field in the current menu

moves to the Select Stow Use menu

Select Stow Use

Next Field

Final Stow Positions: Az angle 180.000

o

El angle 90.000

o

Preliminary Stow Positions: Az angle 160.000

o

El angle - 0.500

o

INTRAC-305 OPERATION

STOW SETUP

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x5) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x5) - ENTER

Description This menu is used to set the co-ordinates for the preliminary

With the antenna not in the Stow position pressing the

Note The Preliminary and/or Final positions may be set to “used” or

Menu key 6 (Next Field) steps the edit box through the four

Notes If all positions are enabled the antenna is driven, in both axes,

Unstow drives the antenna to the Preliminary Stow Position. The only antenna command possible from the Stow Position

and final antenna stow positions.

Stow/Unstow key causes the antenna to be driven to the Final Stow Position via the Preliminary Stow Position.

“not used” in the “Select Stow Use” menu (Menu Key 3). (see

next page)

angle fields. The co-ordinates can be changed using the Numeric Keypad.

to the Preliminary Stow Position. When both axes reach that position the antenna is driven to the Final Stow Position

is Unstow.

1

2

3

4

5

6

skips to the Stow Setup menu

(not used)

toggles the currently highlighted

parameter between ‘ Used’ & ‘Not Used’

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Mode

Press EN to accept settings

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Used/ Not Used

Stow Setup

Next Field

moves the highlight box to the next field in the current menu

Final Stow Positions: Az angle > Used < El angle Not Used

Preliminary Stow Positions: Az angle Not Used

El angle Used

OPERATION INTRAC-305

SELECT STOW USE

Path MENU KEY 3 from “Stow Setup” on previous page.

Description Allows the Azimuth and Elevation Preliminary & Final Stow

Positions to be enabled or disabled. Note If both Preliminary Stow axes are disabled the antenna will

drive direct to the Final Stow position on pressing the Stow

key. If only one Preliminary axes is disabled the antenna will

drive in the other axis to its Preliminary position before

carrying on to the Final position.

Menu key 6 (Next Field) steps the edit highlight through the

four fields. Menu Key 5 (Used/Not Used) toggles the selected

field between used and not used. Pressing ENTER accepts the displayed settings and returns

to the “STOW SETUP” menu.

3

Beacon Receiver: Fitted Beac pol select: Not Fitted

Polarization : Fitted Mount Az/El : Fitted

Type HrAng/Dcl: Not Fitted Resolver x2 : Fitted Type x1 : Not Fitted

Extended Az : Not Fitted Geared Pol : Not Fitted SimAx Drive : Fitted Inv Beacon Lock: Not Fitted

1

2

3

4

5

6

(not used)

toggles the highlighted parameter between Fitted/Not Fitted

resets the menu to display the currently stored values

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37 Az Angle 210.50 Pol Angle 27.4

Function

Press EN to accept all fields

Next Field

Fitted/ Not

Home

Standby

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

Recall Existing Settings

INTRAC-305 OPERATION

FITTED OPTIONS

Path HOME - FUNCTION - SYSTEM SETUP - MENU KEY 6 (x6) - ENTER

or From Models or Configuration SYSTEM SETUP - MENU KEY 6 (x6) - ENTER

Description Various options such as polarisation drive and simultaneous

The various options are shown on this screen. Menu Key 6 (Next Field) steps the highlighted edit line

Menu Key 4 (Fitted/Not) toggles the option between fitted and

Menu Key 5 (Recall Existing Settings) resets the options to

Pressing ENTER accepts the displayed settings. Note Beacon Pol Select, Extended Az, Geared Pol, and Inv

SimAx Drive should be set to “Fitted”. Normally, when replacing an APC300, the correct resolver

axis drive are available on the INTRAC-305. Their use has to be programmed into the INTRAC in order for them to be usable. That programming is carried out in this menu.

through the options.

not fitted.

the state they were in when this menu was entered.

Beacon Lock should be set to “Not Fitted”.

type will be x2.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Config

System Setup

Function

Press EN to accept selection

>IESS-412<

SGP SGP4 SGP8 ADP4 ADP8 BASIC

skips to the Home (root) menu

Models

Next Field

moves the highlight box to the next field in the current menu

OPERATION INTRAC-305

RAPID MODEL GENERATE

Path HOME - FUNCTION - MODELS - ENTER or From Configuration or System Setup

MODELS - ENTER Description IESS-412 & NORAD ephemeris data can be loaded into the

INTRAC-305. This data is primarily for Program Track use.

HOWEVER the INTRAC-305 can use this data to generate an

ORBIT MODEL for the satellite. The advantage of this is that

the model is available immediately rather than after the 24hrs

it would take if the INTRAC had to learn the orbit. The

INTRAC is then immediately immune to long beacon outage

or power failures. The INTRAC will accept the ephemeris data two days either

side of the data’s actual validity period. The SGP/SDP modelling algorithms for the NORAD data will

give slightly different pointing results for a given set of data.

Except that the SGP4/8 algorithms are for Near Earth orbits

and SDP4/8 are for Deep Space orbits. (Geostationary Orbits

are SDP). The INTRAC will not allow a model to be made

using the wrong type of orbit algorithm. It is assumed that the user will know which NORAD algorithm

applies for the data being used. Menu Key 6 (Next Field) steps the selecting highlight through

the seven selections. Once the required selection is

Note For more information on working with IESS-412 & NORAD

highlighted pressing ENTER causes the model to be

generated and the INTRAC to enter Tracking Mode.

data see page 68.

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Config

System Setup

Function

Press EN to accept selection

Next Field

> IESS-412<

SGP SGP4 SGP8 ADP4 ADP8 BASIC

skips to the Home (root) menu

Models

INTRAC-305 OPERATION

PROGRAM TRACK

Path HOME - FUNCTION - MODELS - MENU KEY 6 - ENTER or From Configuration or System Setup

MODELS - MENU KEY 6 - ENTER

Description IESS-412 or NORAD ephemeris data can be used, if

required, to operate the INTRAC-305 in Program Track mode.

Note Much better tracking is achieved by the INTRAC either

building an orbit model from its learning mode or by generating an orbit model from IESS-412 or NORAD data.

Menu Key 6 (Next Field) steps the highlighted selection bar

through the seven algorithm selections. Pressing ENTER accepts the highlighted selection and initiates IESS Track mode, i.e., Program Tracking.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Config

System Setup

Function

Press EN to accept selection

>IESS-412 SET <

NORAD NOT SET

skips to the Home (root) menu

Models

Next Field

moves the highlight box to the next field in the current menu

OPERATION INTRAC-305

RESERVE MODEL

Path HOME - FUNCTION - MODELS - MENU KEY 6 (x2) - ENTER

or From Configuration or System Setup MODELS - MENU KEY 6 (x2) - ENTER

Description Once the INTRAC-305 has built an orbit model it can track

the satellite with no tracking signal for 72hrs. After this time if

there is still no signal the INTRAC deems the model to be

expired and ceases to track. In such a situation the INTRAC can fall back into Program

Track mode using the “Reserve Model”. The “Reserve Model” requires that valid IESS-412 or NORAD

data be loaded and that the required reserve model is

selected. In this menu the required reserve model, IESS-412 or

NORAD is set. Menu Key 6 (Next Field) steps through the two selections.

Pressing ENTER accepts the highlighted selection. Note The words SET and NOT SET following IESS-412 and

NORAD refer to the previous selection. Pressing ENTER will

make the highlighted selection SET and the other NOT SET

regardless of the current displayed state.

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

(not used)

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Function

Press EN for next page and proceed to next IESS screen-(2)

Next Field

Year 97 Minute 35

Month 12 Second 10

Day 25 Min Intv 15

Hour 11 Day Perd 04

INTRAC-305 OPERATION

EDIT IESS-412

Path HOME - FUNCTION - MODELS MENU KEY 6 (x3) - ENTER

or From Configuration or System Setup MODELS - MENU KEY 6 (x3) - ENTER

Description This menu is used to input IESS-412 data. It comprises three

For more information on working with IESS-412 data see

Menu Key 6 (Next Field) steps the edit box through the edit

Menu Key 4 returns to the first page from page two or page

Note In the IESS-412 data supplied the LMO value is in the range -

This only applies to the LM0 data field.

screens the first of which is shown above. The full IESS-412 data is entered into the three screens. Pressing enter after all the data has been entered causes a check to be made on the data for validity. If the check is OK the data is accepted.

page

fields. The data is input using the numeric keypad. Pressing ENTER steps onto the next page.

three. Pressing ENTER on page three causes the data to be checked and accepted if valid.

180 to +180. The INTRAC-305 cannot accept negative values for this field from the front panel. (It can from the RCM-4) It is therefore necessary to add 180 to the supplied value when entering from the front panel.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

checks the validity of the contents of the NORAD buffer

cycles the character at the cursor position through the alphabet

inserts a decimal point at the cursor position

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Valid check

A - Z

Decimal Point

Function

Press EN to accept all fields

Next Field

Char No:019 92 50 A 95100.94672

Min Intv 3

Day Perd 28

OPERATION INTRAC-305

EDIT NORAD BUFFER

Path HOME - FUNCTION - MODELS MENU KEY 6 (x4) - ENTER

or From Configuration or System Setup MODELS - MENU KEY 6 (x4) - ENTER

Description This menu is used to input NORAD Ephemeris data. Menu Key 6 (Next Field) steps the edit box through the three

entry fields. The NORAD string data is entered in the top

box. Char No: ___ indicates the position of the cursor in the

data string. As the cursor reaches the right end of the edit

box the data scrolls. Data is entered/edited using Menu Keys 4 & 5 (A - Z and

Decimal Point) and the Numeric Keypad. To enter an alphabet character position the cursor and press

Menu Key 4. Each press steps the character at the cursor

position through the alphabet. Menu Key 5 inserts a decimal point at the cursor position. The +/- key on the Numeric Keypad inserts a - or a space at

the cursor position. One press inserts a - and the next a

space. Note Inserting a number causes the cursor to step to the next

Min Intv = Minimum Interval Day Perd = Day Period

character position. However inserting a letter, a - or a space

does not and the  key must be used to move on.

3

Year 00 Hour 13 Month 1 Minute 21 Day 1 Second 35

Star Az 123.12 Star El 57.32

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Function

Press EN to accept selection

Next Field

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

Models

Config

System Setup

INTRAC-305 OPERATION

EDIT STAR TRACK

Path HOME - FUNCTION - MODELS MENU KEY 6 (x5) - ENTER

or From Configure or System Setup MODELS - MENU KEY 6 (x5) - ENTER

Description The Star Track Model keeps the antenna pointed at a specific

star by compensating for the rotation of the earth.

It requires the co-ordinates of the star to be input together

with the date and time of those co-ordinates.

The model is then built using above data and the Station Co-

ordinates. (see Station Co-ordinates menu on page 33)

Menu Key 6 (Next Field) steps the edit box through the eight

data fields. The data is entered using the Numeric Keypad.

Pressing ENTER accepts the displayed data and enters Star

Track mode.

Note This facility is used for engineering purposes.

Satellite Number 01 Elevation 33.74

o

Azimuth 162.83

o

Polarization - 90.0

o

Band 1 Frequency 950.000000 MHz

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Function

Press EN to accept selection

Next Field

OPERATION INTRAC-305

EDIT SATELLITE TABLE

Path HOME - FUNCTION - MODELS - MENU KEY 6 (x6) - ENTER

or From Configuration or System Setup MODELS - MENU KEY 6 (x6) - ENTER

Description This is the same menu as “Edit Satellite Table” under the

Configuration Menu. (see page 25)

3

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

skips to the Models menu

skips to the Config menu

skips to the System Setup menu

moves the highlight box to the next field in the current menu

Current Mode Tracking Control State Local Beac Freq 11.452000 GHz Beac Level -10.05 dB El Angle 25.37

o

Az Angle 210.50

o

Pol Angle 27.4 o

Standby

Home

Models

Config

System Setup

Function

Press EN to accept selection

Next Field

> INTRAC <

IESS-412 NORAD

INTRAC-305 OPERATION

CLEAR MODELS

Path HOME - FUNCTION - MODELS MENU KEY 6 (x7) - ENTER

or From Configuration or System Setup MODELS - MENU KEY 6 (x7) - ENTER

Description With this menu the actual INTRAC orbit model is cleared or

the IESS-412 data and/or the NORAD data is flagged as being no longer valid.

If, after clearing the INTRAC model, Auto Continue is pressed

the INTRAC enters Learning Mode.

If, after clearing the IESS-412 Model, IESS412 is selected for

“Rapid Model Generate” or for “Program Track” the INTRAC

enters the “Edit IESS-412” menu for the data to be updated.

Similarly if NORAD is selected for “Rapid Model Generate” or

“Program Track” after the NORAD Model has been cleared the INTRAC enters the “Edit NORAD” menu for the data to be

updated.

1

2

3

4

5

6

puts the antenna control system into STANDBY mode and skips to the HOME menu

skips to the Home (root) menu

updates the Show Alarms display

attempts to reset all latched alarms and clears Alarms display

shows the previous page of alarms (if there is more than one page)

shows the next page of alarms (if there is more than one page)

Alarm Code 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00

Beacon Alarm (SEC) Hardware Fault Servo Alarm (SEC) Az Soft Limit El Soft Limit Unable to Predict (SEC) Polar Soft Limit CW Polar Soft Limit CCW Emergency Stop Model Expire Remote Jog Time-out

>More<

Standby

Home

Update Alarms

Clear Alarms

(Previous Page)

OPERATION INTRAC-305

SHOW ALARMS

Path HOME - SHOW ALARMS (Menu Key 5)

Description This screen shows all the currently active alarms, both

primary and secondary. If there are more alarms active than

can be displayed on one page “MORE” is appears at the

bottom of the screen. Menu Keys 5 & 6 can then be used to

move through the pages of alarms. If there is only one page

of alarms Menu Keys 5 & 6 are not labelled. Primary alarms will cause the System Alarm indicator to

illuminate drawing attention to the fact that an alarm has

become active. Secondary alarms do no illuminate the

indicator but will still be displayed on the alarms screen even

if there are no primary alarms.

Note The alarm conditions do not update automatically whilst being

displayed. To check if an alarm state has changed press

Menu Key 4 (Clear Alarms) to clear the display. Follow this

by pressing Menu Key 3 (Update Alarms) to display the

current alarm state.

3

1

2

3

4

5

6

shows the Alarms menu ie the currently active alarms

toggles the INTRAC between Remote and Local control modes

Home

Standby

(not used)

Show Alarms

puts the antenna control system into STANDBY mode and skips to the HOME menu

Beac Level

Beac Freq

El Angle

Az Angle

Pol Angle

Remote

Current Mode

Select Local

(not used)

INTRAC-305 OPERATION

REMOTE/LOCAL

Path HOME - MENU KEY 6 Menu Key 6 toggles the INTRAC-305 between Local (Front

Panel) and Remote control/operation.

Compare the above screen (remote selected) with the one for

the Home menu (local selected).

With Remote selected only three functions are available on

the front panel. The ability to display the active alarms (Show Alarms), the ability to select Standby and the ability to return control to Local.

All other menu functions are transferred to the Remote

Terminal.

Note Because the Diagnostics On/Off selection in the Configuration

Menu affect the Remote Port (see page 28) in order to be able to use the Remote Terminal facility Diagnostics MUST be set to OFF.

OPERATION INTRAC-305

NORMAL OPERATION Continuing Tracking With the INTRAC-305 operating normally it will be in Tracking

Mode and will require no operator input. Should it become necessary to move the antenna off satellite

for some reason, such as to stow it because of wind, all that

is required to resume tracking is to select Auto Continue.

(after the antenna has been unstowed)

To Track a new Satellite Set the Beacon Frequency. Set the Polarisation angle if motorised Pol fitted. Point the antenna at the required satellite using Manual

control, Goto Position or Goto Satellite. Peak the antenna on the beacon signal using Manual control

or Search. When the antenna is peaked on the beacon signal cause the

INTRAC to enter Learning Mode by selecting Auto New

Model. After 24 hours of learning the INTRAC will automatically enter

Tracking Mode. Note If Auto Continue is selected instead of Auto New Model and

the previous model has not been cleared the antenna will

drive back to the previous satellite and continue tracking it.

If the beacon signal is lost the INTRAC will enter Predicting

Mode. It will then track the satellite by predicting from the

model for a period of time depending on how long it has been

learning. If Tracking Mode had been achieved before the

signal is lost the INTRAC will track in Predicting Mode for up

to 72 hours after which time it will deem the model to no

longer be accurate enough. When the beacon signal returns, if the INTRAC is still in

Predicting Mode, Tracking Mode will be resumed. If the

INTRAC has entered Standby, due to the period without

signal being too long, Learning Mode will have to be invoked

from the front panel.

4

INTRAC-305 ALARMS & ERRORS

4. ALARMS & ERRORS

The INTRAC-305 has two type of alarm condition. Primary

Alarms and Secondary Alarms. The system will go into Standby mode if a Primary Alarm is triggered. Secondary Alarms leave the INTRAC in its current mode.

PRIMARY ALARMS A Primary Alarm becomes active if one (or more) of the

following conditions arise :-

 Antenna movement limit switch activated.  Software limit tripped.  Emergency Stop button operated.  Interlock switch activated.  Motor drive failure. (Drive Fail Alarm)  Antenna moves in wrong direction. (Drive Fail Alarm)  Hardware (processor) fault.  Antenna driven within 1.4 of 0 Az in the Northern

Hemisphere or within 1.4 of 180 Az in Southern Hemisphere (Drive Fail Alarm).

 Resolver fault. (Synchro alarm) (apparent position

change of more than 1.4 in1/64 second).

Drive Fail Alarm The Drive Fail Alarm encompasses a number of other alarms.

If there has been no change in the least significant bit (LSB) of the resolver output within 10 seconds of drive being activated. If either Az or El axis drive more than 1.4 in the wrong direction. If the antenna is driven within 1.4 of North (Azimuth 0) {or 1.4 of South (Az 180) Southern

Hemisphere}. The Drive Fail Alarm is not activated in Manual (P) Mode. If a drive time-out occurs the INTRAC enters Standby Mode.

This prevents the drive motors being damaged by continually

re-starting. When any Primary Alarm becomes active the red “System

Alarm” indicator on the INTRAC front panel illuminates and

the system enters Standby Mode. The actual alarm which

has occurred can then be viewed on the screen by pressing

Menu Key 5 (Show Alarms) in the Home menu.

ALARMS & ERRORS INTRAC-305

SECONDARY ALARMS There are three Secondary Alarms :-

 Unable to Predict Alarm.  Beacon Alarm.  Servo Alarm.

Unable to Predict This alarm is raised when the INTRAC has not enough

confidence in the orbit model to be able to predict the satellites position. e.g. during the early part of learning a new model or after there had been no beacon signal for more than 72 hours.

Beacon Alarm The Beacon Alarm is raised when the signal strength does

not vary during step cycles or when beacon lock is lost.

Servo Alarm The Servo Alarm is raised when the INTRAC fails to detect

the expected amount of antenna movement during a step cycle. This can be caused by the servo performance not

corresponding to the routine’s model of the antenna drive

characteristics. The INTRAC reacts by repeating the step cycle with a larger drive demand.

Secondary Alarms do not, necessarily, mean that there is a

system fault nor do they illuminate the System Alarm indicator. The occurrence of a secondary alarm may be checked by selecting Show Alarms in the Home menu.

ALARM OUTPUTS Three sets of changeover relay contact outputs are available

on a 25-way D-type connector on the INTRAC rear panel. There is one relay for a Primary Alarm, one for a Secondary Alarm and the third indicates that the beacon signal has fallen below the user set beacon threshold.

RECOVERING FROM ALARMS All Primary Alarms, except the Hardware Alarm in Auto Mode,

cause the unit to be put into Standby Mode. Recovery from Drive Fail, Synchro and Hardware (other than when in Auto Mode) Alarm conditions are cleared by pressing any Mode selection key (eg Standby). Soft Limit and hard limit alarms can only be cleared by driving back from the limit using Manual Mode. Emergency Stop and Interlock alarms can only be cleared by removing the cause of the alarm.

If a Hardware Alarm occurs when the INTRAC is in Auto

Mode the unit will perform a processor reset and then enter learning mode to re-learn the orbit model.

4

INTRAC-305 ALARMS & ERRORS

POWER FAILURE The INTRAC incorporates non-volatile memory and a battery

backed real time clock. The onset of a power failure is

detected and the current mode is stored before the processor

ceases to operate. When power is restored the INTRAC

performs an automatic recovery as below : If the unit was in Auto (Tracking) Mode at the time of the

power failure and no Primary Alarms have become active the

unit will resume tracking. The antenna will be moved (if

necessary) to the current satellite position based on the orbit

model and the real time clock. If the unit was in Auto (Learning) Mode it will resume in that

mode. However whether it continues learning or re-starts to

learn depends on the ratio of the completed learning time to

the period without power. (i.e. how dependable the learnt

orbit will now be) If the INTRAC was in any other Mode or if a Primary Alarm

had occurred the unit will power up in Standby Mode with a

power-up alarm.

ERRORS Errors are user errors and involve the entry of non valid data.

Where data is entered outside the allowable limits for that

data such as setting the beacon frequency outside the range

of the selected band. The entered data is changed to the limit

nearest to the entered value and marked with an asterisk (*).

On the bottom of the screen the message :-

“ENTRY ERROR!, limits forced =*” is displayed. The forced limit data may be accepted by re-pressing the

ENTER key or the correct value keyed in.

IESS-412 DATA Where IESS-412 data is entered with the incorrect 170hr

checksum the checksum is corrected by INTRAC in the same manner as above. However it is up to the user to ascertain that it was the checksum which was wrong and not that wrong value data was entered.

Deliberately blank

ALARMS & ERRORS INTRAC-305

5

INTRAC-305 TECHNICAL DESCRIPTION

5. TECHNICAL DESCRIPTION

This section looks at and explains the Operational Modes and

Functions of the INTRAC-305 and at the tracking algorithm that makes the INTRAC-305 one of the most accurate tracking antenna controllers available.

The INTRAC-305 achieves its very high accuracy satellite

tracking by building a model of the satellite’s orbit and then by using that orbit model to direct the antenna.

The algorithm used to build the orbital model has been

continually developed and enhanced by Advantech AMT Limited since 1983.

The tracking accuracy is typically similar to that achieved by a

monopulse system and can, under some conditions, be better than that achieved by a monopulse system.

THE TRACKING ALGORITHM During initial acquisition the INTRAC algorithm tracks the

satellite using a third order (for each axis) unbiased tracking filter. This algorithm dynamically adjusts the period between the step cycles to match the perceived orbit inclination and received beacon signal level fluctuations and noise level. During this initial period the tracking accuracy is only very slightly lower than the full long term INTRAC tracking accuracy.

The most significant difference during the learning period (first

24hrs) is not the accuracy of tracking but the time for which the system can predict in the event of loss of the beacon signal. This can be overcome by using Intelsat IESS-412 or NORAD data to establish an initial INTRAC model so that the full prediction ability is available from the start. This model is then modified and optimised by the INTRAC algorithm in the same manner as it would continuously update a model it had “learnt”.

The key to deriving a reliable and accurate orbital model is the

ability to derive accurate estimates of the many parameters involved in the model. Much specialised noise processing expertise and experience has been applied in the design of the INTRAC algorithm to ensure that INTRAC can build an accurate model and can maintain it even when the beacon signal is subject to severe fluctuations.

The INTRAC algorithm uses a robust pointing error estimator to obtain the raw satellite

position estimate, normally at 10 minute intervals. The raw satellite position estimate is filtered with a narrow noise-bandwidth tracking filter to produce the basic, multi parameter, orbital model. To correct short-term errors in the basic model resulting from modelling error, windage and satellite station keeping manoeuvres, the difference between

TECHNICAL DESCRIPTION INTRAC-305

the raw satellite position estimate and the orbital model is filtered with another tracking filter (known as the "relationship algorithm") capable of tracking and correcting transients. This is then combined with the basic model to form a reliable predictor that tracks mean windage, refraction and stationkeeping manoeuvres without error.

The INTRAC tracking filters are designed in such a way as to

enable the model to provide the required accurate pointing prediction at all times. Even when not verified by measurements, as for example occurs with loss of beacon, the tracking filters are capable of accurately predicting the satellite orbit for many days. Under INTRAC control, pointing is always controlled from the internal satellite orbit model. When a measurement cycle is performed it is always done as a perturbation with respect to current pointing. Thus, unlike conventional steptrack, INTRAC is always on track when a measurement cycle is performed. INTRAC never uses the measurement cycle for the purpose of directly bringing the beam on track. INTRAC simply performs one measurement cycle in each axis every 10 minutes in order to up-date the parameters used in the orbital model and for the rest of the time keeps the beam correctly pointed.

As a result of the combination of thermal noise, fade,

scintillation, random windage-induced platform-reference motion and other noise sources the beacon signal will, during a measurement cycle, contain noise additional to that directly attributable to the measurement cycle itself. Careful algorithm design ensures that this noise has zero mean value and has a value of standard deviation such that it is equivalent to thermal noise of a certain effective value of C/No. By special design of the measurement cycle the INTRAC system minimises this effective value of C/No in a way that is not possible with conventional steptrack methods. Furthermore the INTRAC measurement cycle design discriminates so effectively against the slow component of received beacon signal power fluctuation, caused for example by rain fades, that it almost completely suppresses errors caused by linear beacon ramps of all practicable slopes.

The INTRAC algorithm also incorporates adaptive

compensation for imperfections in the antenna drives. As a result its performance is largely unaffected by servo backlash, AC track motor drive rate and transportation rate (motor to axis rate) and coast because of the specific choice of perturbation pattern and the use of high resolution position transducers. The INTRAC servo algorithm dynamically calibrates the mechanical coast of the antenna and automatically compensates for it if it is within reasonable limits (less than 1/20 beamwidth).

Wind affects tracking in two ways. The antenna structure is

distorted by the wind load and this distortion shifts the beam pointing relative to the angle transducer reading. This

5

INTRAC-305 TECHNICAL DESCRIPTION

component of beam shift is not visible to the position transducers. The mean of the reference shift is tracked by the INTRAC algorithm in a similar way to a stationkeeping manoeuvre.

The component of beam shift that is visible to the position

transducers is entirely tracked by INTRAC within a 10 MHz noise bandwidth. When the position transducers accurately reflect beam deflection in wind INTRAC continuously tracks this antenna deflection at 16 sec updates. To support tracking of visible wind-induced beam deflection between measurement cycles the INTRAC servo control algorithm maintains a short-term average of beam pointing. When deciding whether to update beam pointing INTRAC references this average rather than the current pointing. A further small deadband is also applied to suppress unnecessary hunting.

The INTRAC tracking filter distinguishes received beacon

signal power fluctuations, fades and noise from the mean component of windage-induced beam-pointing, orbit changes and beam refraction. The effect of the fluctuations, fades and noise on the INTRAC tracking filter is as if these were a zero mean position random noise source. The variance of these is brought within specification by tracking the position estimates with a narrow noise bandwidth tracking filter. The mean components of windage-induced beam-pointing, orbit changes and refraction are seen as transients to be tracked by the INTRAC relationship algorithm. The design of the relationship algorithm is a carefully evolved working compromise between transient performance and noise suppression which provides high accuracy tracking under all conditions likely to be encountered in practice.

THE MODES The INTRAC-305 has six major operational modes :  Standby

TECHNICAL DESCRIPTION INTRAC-305

 Auto - (tracking but includes learning & predicting)  Manual  Goto - (Goto Satellite, Goto Position & Search)  Sleep - (alarm induced, not user selectable)  Remote (transfers control to a remote terminal)

Standby Standby mode is a “no movement” mode, the antenna is not

driven (the brakes where fitted will be applied) but the pointing angles and beacon signal level are monitored and displayed.

External inputs to the INTRAC are also monitored and any

primary alarms which occur are indicated. Any primary or

secondary alarms will be displayed if “Show Alarms” is

selected. Standby mode is entered in one of three ways :  selected by the operator  a primary alarm occurs  at the end of a Goto move or at the end of a search

Auto (normal operating mode) After pointing and peaking the antenna at the required satellite

Auto New Model should be selected. This will cause the

INTRAC to enter its period of learning the satellite’s orbit. The INTRAC performs cross scans to determine the satellite’s

position. These scans are performed at intervals (normally ten

minutes but more frequently if INTRAC deems necessary) and

the pointing parameters used to build the orbital model. When

carrying out a cross scan the antenna describes a small cross

(normally +/- 5% of the antenna’s 3dB beamwidth) in the sky to

determine the satellite position estimate. After 24hrs the INTRAC has built the full orbital model.

However during the building process the INTRAC maintained a

simple orbit model for the satellite which allowed INTRAC to

track with very nearly the same accuracy as its long term

accuracy.

Once the model is complete the INTRAC enters Tracking

Mode. The model is used to point the antenna and because of

5

INTRAC-305 TECHNICAL DESCRIPTION

the high accuracy of the model the tracking is within 0.05dB of peak signal tracking.

In Tracking Mode the INTRAC continuously updates the model

by making small perturbations of the antenna and incorporating the resultant data into the model. During periods when the

satellite’s orbit is changing because of station keeping

manoeuvres the INTRAC may increase the frequency of the perturbations.

If the beacon receiver stops providing a useful signal* the

INTRAC will enter “Predicting” sub mode. In this mode the INTRAC will continue to point the antenna according to the

model but will not update the model. Once “Tracking Mode” has been achieved “predicting” can continue for 72hrs. If the

beacon receiver returns to providing a useful signal* within this period the INTRAC returns to updating the model. If, after 72hrs, the beacon is still not producing a useful signal* the model is deemed to have expired. If this occurs the INTRAC

can fall back on the “Reserve Model” which is a Program Track

using either IESS-412 or NORAD data. (see Reserve Model page 48)

* useful signal A useful signal is defined as one that varies sensibly during

antenna movements, is neither over or under range and the beacon receiver is in lock.

Manual Manual Mode allows the operator to drive the antenna using

the Manual Control keys on the INTRAC front panel. It is normally only used for small movements of the antenna such as peaking when the position of the satellite is known with close accuracy.

For larger antenna movements one of the Goto modes is faster

and where the satellite’s position is only roughly known search

is employed to peak the antenna.

There are two Manual Modes. Manual (P) Mode is manual

control from the front panel. Manual (A) Mode is manual control from the Remote Terminal. (see section 9). The antenna can be driven through North (Azimuth 0), in the Northern Hemisphere, or South (Az 180), in the Southern Hemisphere, only in Manual (P) Mode.

Goto There are three Goto sub modes. Goto Position and Goto

Satellite provide a convenient method of driving the antenna to a specific position. Search mode is the automatic scanning of an area of sky for a satellite.

Goto Position In this mode the operator enters the co-ordinates and beacon

frequency of the required satellite and presses the enter key. The entered co-ordinates are checked for validity (i.e. are they

TECHNICAL DESCRIPTION INTRAC-305

within the soft limits?). If they are invalid the INTRAC sets the

maximum possible angle(s) in the required direction and

prompts the operator for action. If the co-ordinates are valid

the INTRAC drives the antenna to those co-ordinates and

enters Standby. The antenna can then be peaked using

manual mode or search mode (see below) before selecting

Auto New Model. Note If Auto Continue is selected at the end of Goto and there is a

model in existence the INTRAC will continue to track using that

model. To commence learning a new orbit either Auto New

Model should be selected or any existing model cleared before

selecting Auto Continue.

Goto Satellite This mode allows one of the previously programmed satellites

(up to 40 can be programmed) to be selected by number and

its position driven to. Using the “Edit Satellite” sub menu of the

Goto Satellite menu a new satellite can be added or an existing

one edited. Having selected the required satellite pressing the

enter key causes the antenna to be driven to that satellite. The

INTRAC enters Standby when the antenna is at the satellite’s

position. Antenna position peaking can then be carried out

manually or in search mode (see below). To commence

tracking this new satellite select Auto New Model or if there is

no existing model Auto Continue may be selected. (see Note

above)

Search Search Mode conducts a search of the sky based on

parameters entered in this menu. When the menu is entered

the displayed parameters are those of the current antenna

pointing. e.g. the parameters from a Goto move. If these

parameters are not those required they may be edited in this

menu. (see page 21) The search box size angles are plus and minus on the nominal

angle. Thus entering 2 by 2 would cause a search box of 4

square. The search begins in the nearest corner of the defined box to

the antenna’s current pointing. The search pattern is a “toast

rack” or “serpent shape. The scanning comprises full scans in

elevation for each move in azimuth. The azimuth move is

equal to the 3dB beamwidth of the antenna commencing 1/2 of

the 3dB beamwidth in from the edge of the box. The position of the highest beacon signal strength during these

scans is recorded. At the end of the “serpentine” search the

antenna is driven to the point of highest signal strength found

during those scans and phase two of the search is

commenced. This is the peaking phase and causes the antenna to search a

smaller area of sky around the point of highest signal strength

for the peak level. Again the position of the highest signal

5

INTRAC-305 TECHNICAL DESCRIPTION

strength is recorded and at the end of this phase the antenna is driven to that position and the INTRAC enters Standby.

At this point the peak may be confirmed manually and/or

learning mode entered by selecting Auto New Model.

Remote Remote Mode transfers control of the INTRAC to a remote

terminal.

It is selected with Menu Key 6 (Select Remote) from the Home

menu. Once in Remote Mode only four functions are available from the INTRAC front panel. The emergency stop switch will inhibit the antenna drive as normal, the alarms can be displayed, Standby Mode can be entered and control can be returned to the front panel again with Menu Key 6 (Select Local).

USING IESS-412 OR NORAD DATA The INTRAC-305 can make use of Intelsat IESS-412 11-

parameter or NORAD ephemeris information in two ways.

1. The information can be used by the INTRAC to generate an INTRAC model of the satellites orbit.

This model is then be used by the INTRAC as it would

use a model it had learnt itself. This means that there is not the need for the 24hr learning period. The model is then updated as any INTRAC model would be.

2. The INTRAC can

be commanded to Program Track using positions calculated from the ephemeris data.

The IESS-412 and NORAD data sets can be entered either

manually from the INTRAC front panel or from a PC. A stand alone program is available for loading the data file from a PC. This program can be used alone or in conjunction with the Remote Control Terminal RCM-4.

A description of this program is given the appendices.

The IESS-412 data The IESS-412 data set comprises 21 fields of data :- IESS Epoch Year range: 80 to 99 (20th century)

00 to 79 (21st century) IESS Epoch Month range: 1 to 12 IESS Epoch Day range: 1 to 31 IESS Epoch Hour range: 0 to 32 IESS Epoch Minute range: 0 to 59 IESS Epoch Second range: 0 to 59

TECHNICAL DESCRIPTION INTRAC-305

IESS Minutes Interval range: 0 to 59 IESS Days Validity range: 0 to 28 IESS Sat LM0 range: 0 to 360 deg IESS Sat LM1 range: -9.99 to 9.99 deg/day IESS Sat LM2 range: -9.99 to 9.99 deg/deg/day IESS Sat LONC range: -9.99 to 9.99 deg IESS Sat LONC1 range: -9.99 to 9.99 deg/day IESS Sat LONS range: -9.99 to 9.99 deg IESS Sat LONS1 range: -9.99 to 9.99 deg/day IESS Sat LATC range: -9.99 to 9.99 deg IESS Sat LATC1 range: -9.99 to 9.99 deg/day IESS Sat LATS range: -9.99 to 9.99 deg IESS Sat LATS1 range: -9.99 to 9.99 deg/day IESS Sat LONG170 range: 0 to 360 deg IESS Sat LAT170 range -9.99 to 9.99 deg/day Also required to be set are the IESS Az & El offsets which are

input on the Function - System Setup - Station Coordinates menu screen.

The IESS Epoch defines the time instant at the start of the

period of the IESS data. The IESS Minutes Interval defines the period in minutes between pointing updates in Program Track mode. The IESS Days Validity (normally 7) defines the period of validity of the data. The INTRAC will accept and use the data two days either side of the validity period.

The parameters IESS Sat (LM0, LM1, LM2, LONC, LONC1,

LONS, LONS1, LATC, LATC1, LATS, LATS1) are the IESS412 11-element ephemeris. The parameters IESS Sat (LONG170, LAT170) are the IESS-412 11-element ephemeris 170hr parity check.

Note The data ranges shown above as +/- 9.99 actually accept more

than two places of decimals.

Note The LMO value is given in the range -180 to +180. The

INTRAC-305 cannot accept negative values for this field from the front panel. (It can accept them from the RCM-4). It is therefore necessary to add 360 to the supplied value if it is

5

INTRAC-305 TECHNICAL DESCRIPTION

negative when entering from the front panel. This only applies to the LMO data field.

NORAD data The NORAD ephemeris data consists of a string of 166

characters. The first 160 characters are split into two “Card Element Sets” of 80 characters each. The next two characters

(161 & 162) comprise the Minutes Interval and characters 163 & 164 comprise the Period of Validity of the ephemeris. The final two characters (165 & 166) are the check sum.

There are ten blocks of orbital element parameters contained

in the NORAD ephemeris character string :-

Charas. Data Description 19 - 32 EPOCH format - YYDDD.DDDDDDDD

34 - 43 XNDT20 1st rate of change (rev/day/day) 45 - 52 XNDD60 2nd rate of change (rev/day/day/day) 54 - 61 BSTAR damping factor (er**-1) 89 - 96 XINCL inclination (deg) 98 - 105 XNODEO ascending node (deg) 107 - 113 EO eccentricity 115 - 122 OMEGAO argument of perigee (deg) 124 - 131 XMO mean anomaly (deg) 133 - 143 XNO mean motion (rev/day)

RAPID MODEL GENERATION The INTRAC-305 can use the IESS-412 or NORAD data to build the satellite’s orbit model instead of having to learn the

orbit over a 24hr period.

The IESS-412 data is selected for the Rapid Model Generation

in the Models menu and ENTER pressed. The orbit model is calculated and the INTRAC enters Tracking Mode.

For the NORAD data there are five choices of NORAD

algorithm. These are SGP, SGP4, SGP8, SDP4 & SDP8 and each gives a slightly different Az/El pointing for the same NORAD data.

 SGP the original NORAD algorithm  SGP4 applies to Near Earth Orbits  SGP8 applies to Near Earth Orbits  SDP4 applies to Deep Space Orbits  SDP8 applies to Deep Space Orbits

Orbits are differentiated by their period. Those of less than 225

minutes are Near Earth Orbits and those of more then 225 minutes are Deep Space Orbits. Geostationary satellites are in Deep Space Orbit.

It is assumed that the user know which algorithm applies to the

data to be used. However INTRAC will not allow a Near Earth Orbit algorithm to be used with Deep Space Orbit data and vice-versa.

TECHNICAL DESCRIPTION INTRAC-305

The Basic algorithm available in the Rapid Model Generation

table is not of NORAD origin. It has none of the embellishments found in the NORAD routines and is meant for test purposes only.

Once the orbital model has been built using the ephemeris

data the INTRAC tracks the satellite from it and updates and improves it over the following hours and days.

PROGRAM TRACK The IESS-412 and NORAD data can also be used by INTRAC

to calculate the satellite’s path which is then used for a simple Program Track operation.

The selections available in Models - program Track are the

same as are available in Rapid Model Generate. On selecting the required algorithm and pressing ENTER the INTRAC enters Program Track mode.

Program Track is an open loop method of tracking and as such

is unable to correct for any transducer errors or distortions to the antenna caused by wind.

RESERVE MODEL Once the orbital model has been built the INTRAC tracks the

satellite extremely accurately by continuously monitoring the

satellite’s position and updating the model. When the beacon

signal is not present INTRAC can still track accurately by

predicting the satellite’s position from the model. However if

the beacon signal is lost for more than 72hrs INTRAC deems the model to be no longer valid. In such a situation INTRAC can fall back to a Reserve Model. This is a Program Track model built from either the IESS-412 or the NORAD data. The selection is made in Models - Reserve Model. Assuming the appropriated data has been loaded and is valid INTRAC will automatically fall back to this model when it can no longer predict accurately.

CLEAR MODELS The “Clear Models” menu is used to clear one or more of the

INTRAC Model, the IESS-412 Model or the NORAD model. Clearing the INTRAC Model clears the current satellite model. Selecting Auto Continue after this clearing will cause the INTRAC to enter Learning Mode.

Clearing the IESS-412 or NORAD Models simply marks the

ephemeris data as being no longer valid. Selecting IESS-412 or NORAD for Rapid Model Generate or Program Track will cause the menu to jump to the Edit IESS or NORAD data menus for new data to be input. Also clearing the data will mean that Reserve Model will not function.

ANTENNA MOTION LIMITS The INTRAC-305 has user setable software limits to confine

the antenna movement. If a limit is reached in an automatic mode drive is inhibited, the INTRAC emters Standby Mode, a primary alarm is raised and the System Alarm indicator is

5

INTRAC-305 TECHNICAL DESCRIPTION

illuminated. The alarm may be viewed using the Show Alarms menu.

The Soft Limits are set in the Configuration - Soft Limits menu. Note In either Manual (P) or Manual (A) mode the antenna may be

driven through the soft limits with no warning.

AXES POSITION Resolver units are fitted to the driven axes of the antenna.

These units supply positional information to the INTRAC’s

resolver interface circuits.

Depending on the system “Extended Azimuth” or “EG-01”

and/or “Geared Pol” offsets may need to be set.

Fine Tune offsets may be set to calibrate the resolver outputs

to the actual antenna pointing angle.

TRACKING SIGNAL An L-band Integrated Beacon Receiver (IBR-L) is an option

with the INTRAC-305. When fitted this receiver is tuned to an L-band frequency by the INTRAC based on the “Beacon

Frequency” set for the satellite. If the beacon frequency of the

satellite to be tracked is not in the L-band a Block Down Converter will be required to convert the signal to L-band.

The calculation of the correct L-band frequency for the IBR-L is

performed automatically by the INTRAC for BDCs with standard local Oscillator frequencies so that the beacon frequency may be entered at the actual receive frequency.

Note If an IBR-L is not fitted the INTRAC requires a dc voltage level

which is proportional to the received signal strength from the satellite.

Deliberately blank

TECHNICAL DESCRIPTION INTRAC-305

6

INTRAC-305 INSTALLATION

6. INSTALLATION

Introduction The INTRAC-305 Intelligent Tracking Antenna Controller is a

direct physical replacement for the Andrew APC300 Antenna Steptrack Controller. All that is required for the installation is to remove the APC300 and replace it with the INTRAC-305 and then set-up the INTRAC-305 for the antenna system.

This section provides information on connections and set-up. The INTRAC-305 requires that certain parameters be set and

certain information be input before it will be able to function correctly. Some of this information can be obtained from the APC300 but some will need to be obtained from other sources. The chart below gives the parameters required by the INTRAC-305. Four items under “Fitted Options” should

be set to “Not Fitted” (as indicated) as they are not applicable

to APC300 systems. For more information on these settings see section 3-Operation of this manual.

Electrical supply voltage setting........... ________ volts

Az, El & Pol (if fitted) angles.............Az ____ El ____ Pol ___

Note Once the pointing angles are noted ensure that the antenna is not

moved.

Beacon Level............................................... ________ dB

Beacon Frequency............................... ________ MHz / GHz

Is 18 volts dc LNB supply required on the beacon receiver input N-

type connector. (Only relevant if the SPL IBR-L option is fitted))

Fitted Options Beacon Receiver (IBR-L)................................... Fitted / Not Fitted

Pol Sel A/B......................................................... set to Not Fitted

Polarization........................................................ Fitted / Not Fitted

Mount Type............................................... Az/El or Hrang/Dcl

Resolver Type.........…… x1 or x2 (normally x2 for std Andrew RESK*-300)

Extended Az...................................................... set to Not Fitted

Geared Pol......................................................... set to Not Fitted

Simax Drive....................................................... set to Fitted

Inv Beacon Lock................................................. set to Not Fitted

System Setup Resolver Sense........ Az: true/inv, El: true/inv, Pol :true/inv

Beamwidth......... Azimuth:______ Elevation: _______

Soft Limits ......... Az right: ______ Az left: _________

El up: ________ El down: ________ Pol cw: _______ Pol ccw: ________

Stow Setup - Prelim Position........... Az: ______ El: ______

Final Position....................................Az: ______ El: ______

Stow Use - Prelim Position......... Az Used / Not Used

El Used / Not Used

Final Position................................. Az Used / Not Used

El Used / Not Used

Beacon Threshold........................... _______dB

Station Co-ordinates........ Lat _____ Long _____ Ht in Km _____

Record any stored satellites

WARNING

POSSIBLE LETHAL POTENTIALS EXIST WITHIN THIS EQUIPMENT

THE COVERS SHOULD NOT BE REMOVED EXCEPT BY QUALIFIED PERSONNEL.

SWITCH OFF POWER AND ISOLATE SUPPLY BEFORE REMOVING COVERS.

IF IT IS NECESSARY TO OPERATE THE EQUIPMENT WITH THE COVERS REMOVED FOR

SERVICING PURPOSES ALL NECESSARY PRECAUTIONS SHOULD BE TAKEN TO

PROTECT AGAINST ELECTRIC SHOCKS

INSTALLATION INTRAC-305

Installing the INTRAC-305 comprises mounting the Controller

in a 19” rack, connecting the controller to the Motor Control

Cabinet and to the positional resolvers.

The INTRAC-305 will need to be set-up for the antenna

system including antenna beamwidth, resolver type and internal or external beacon receiver.

Note THE INTRAC-305 MUST NOT BE MOUNTED ONLY BY THE

FRONT PANEL LUGS.

IT MUST BE SUPPORTED ALONG ITS SIDES

Connections (general) Before making connections between the INTRAC Controller

and the Motor Cabinet ensure that they are both isolated from the power source.

Connect the cables between the Motor Cabinet and the

INTRAC.

There should be no earth connection between the INTRAC

and the Motor Cabinet.

All connections between the INTRAC and the Motor Cabinet

should be via multi twisted pair cables with individual pairs screened or an overall screen.

THE SCREEN(S) SHOULD ONLY BE CONNECTED AT THE

INTRAC END.

6

MOTOR

CONTROL

REMOTE

TERMINAL

AZ

RESOLVER

EL

RESOLVER

BEACON

INTRAC-305

POL

RESOLVER

ALARM

MOTOR

CONTROLLER

CABINET

INTRAC-305 INSTALLATION

Connections Block Diagram

All connections to the INTRAC-305 are made via its rear

panel. The following connectors are available :-

Remote Port (I/O) 25-way D-type plug Test Ports 1 & 2 (I/O) 9-way D-type plugs Resolver I/P 50-way D-type plug Motor Controls Output 50-way D-type socket Steptrack I/P 25-way D-type plug Beacon Signal I/P N-type (L-band) socket Power I/P 3 pin IEC plug

Rear Panel Layout

Note: On Dual PSU units the single fused power inlet is replaced by two switched power inlets.

INTRACTM 305 Resolvers

Connector

50 Way D

Signal Name

Type Plug

1 Hi Sin Az

34 Lo Sin Az

35 Hi Cos Az

19

Lo Cos Az

47 Hi Ref Az

31 Lo Ref Az

39 Hi Sin El

23 Lo Sin El

24 Hi Cos El

8 Lo Cos El

32 Hi Ref El

16 Lo Ref El

28 Hi Sin Pol

12 Lo Sin Pol

13

Hi Cos Pol

46 Lo Cos Pol

17 Hi Ref Pol

50 Lo Ref Pol

INSTALLATION INTRAC-305

CONNECTOR PIN ALLOCATIONS

Resolvers The Az, El and Pol resolvers connect to the 50 way resolver

connector.

Note All other pins of the 50 way connector are unused

6

INTRACTM 305 Motor Controls Connector

50 Way

D type

Socket

Signal Name

(SimAx)

18

+12v

1

East * (Northern Hemisphere)

19

+12v

2

West * (Northern Hemisphere)

20

+12v

3

Fast Az

21

+12v

4

Slow Az

22

+12v

5

Down

23

+12v

6

Up

24

+12v

7

Fast El

25

+12v

8

Slow El

26

+12v

9

Pol CCW

27

+12v

10

PolCW

INTRAC-305 INSTALLATION

Motor Control The INTRAC-305 outputs low voltage low current motor drive

signals to the Motor Drive Cabinet.

* In the Southern Hemisphere drive direction is reversed.

Note All other pins of the 50 way connector are unused.

25 way D type

Signal Name

1

Hi Ch1 I/P *

2

Lo Ch1 I/P *

3

Hi Ch2 I/P *

4

Lo Ch2 I/P *

10

Fault / Power-Off

11

Fault Common

12

OK

25 way D type

Signal Name

2

Tx Data (I/P to INTRAC)

3

Rx Data (O/P from INTRAC)

4

RTS

5

CLS

7

GND

INSTALLATION INTRAC-305

Stp-Trk Inputs / Alarm outputs

Note All other pins of the 25 way connector are unused. Note * In the INTRAC-305 only one external input is implemented.

As delivered this will be channel 1 (Primary Beacon). If it is required to use channel 2 (Secondary Beacon) input instead, the internal cable from connector J37 on the INTRAC Interface pcb to the rear panel pcb connector J3 should be moved to rear panel pcb connector J2.

Communication Ports There are three serial communication ports on the INTRAC-

305, “Remote Port”, “Test Port 1” and “Test Port 2”. The

Remote Port is configured for RS232/RS423. Test Port 1& Test Port 2 can be independently configured as either RS423 or RS422.

The pin allocations for both are given in the tables below.

Remote Port

Note 1 All other pins of the 25 way connector are unused. Note 2 RTS & CTS are linked via jumper J18. Note 3 For remote operation the Advantech AMT Limited remote

terminal software package, RCM-4, is required.

6

INTRACTM 305 Serial Port Connector

Remote Control PC

9 way D type

Socket

Signal Type

Signal Name

Signal Type

PC Connector

1

Passive

DCD

2

output

RXD

input

3 input

TXD

output

4

5 GND

GND

6

Passive

DSR

7

8

Passive

CTS

9 N/C N/C

INTRACTM 305 Serial Port Connector

Remote Control PC

9 way D type

Socket

Signal Type

Signal Name

Signal Type

PC Connector

1

2

output

RXDB = RXD-

input

3 input

TXDB = TXD-

output

4

5 GND

6

output

RXDA = RXD+

input

7 input

TXDA = TXD+

output

8

9

INTRAC-305 INSTALLATION

Test Port 1 & 2 RS423

Test Port 1 & 2 RS422

The INTRAC-305 is wired as a DCE unit suitable for direct 1

TXD and RXD data flow directions are standard (relative to

The factory default setting for the three serial ports is RS423.

to 1 connection to the 9-way serial port of a PC AT.

the DTE). Handshake lines are pulled to the ON condition.

The set-up for RS422 is shown over page.

INTRACTM 305 Serial Port Configuration - Connector & Link Positions

RS423

RS422

Ribbon Cable

position.

Link Position

Ribbon Cable

position.

Link Position

Test Port 1

J12

J44 Front

J15

J44 Rear

Test Port 2

J11

J46 Front

J14

J46 Rear

INTRAC-305

Serial Port

INSTALLATION INTRAC-305

Serial Port RS422/423 Setting Setting the Serial Ports to RS422 or RS423 is achieved by

positioning the rear panel ribbon cables and by link positions. The table below shows the positions.

Serial Port Usage The three ports can be used to connect a Remote Control

Terminal, to monitor diagnostic data or to monitor angle data. The specific uses for each port are:-

Remote Port A Remote Control and Monitoring Terminal may be

connected to this port.

Diagnostic data can be monitored by selecting “Diagnostics

On” in the “Function - Configuration” menu. Remote control

of the INTRAC is achieved only if “Diagnostics Off” is selected

in the Configuration menu.

Test Port 1 Diagnostic data is also available at this port together with

Angles data. The selection between Diagnostics and Angles

is made by Menu Key 4 on the “Function - Configuration” menu. The key switches between “Test Port-1 Diags” and “Test Port-1 Angles”

Test Port 2 This port is for a Remote Control Terminal only. The Remote Port allows one PC to be used as a remote

control unit and as a diagnostics monitoring unit. However it cannot do both at the same time.

Note For correct remote control of the INTRAC-305 via the

Remote Port Diagnostics must be set to OFF. Diagnostic data can be monitored during remote operation by using a second PC connected to Test Port 1.

6

INTRAC-305 INSTALLATION

Beacon Signal Connector When an IBR-L beacon receiver is fitted there will be a

“N-type” RF connector on the INTRAC rear panel. It is to this

that the beacon signal is connected.

Note 18Vdc may be connected to the inner connector of the N-type

in order to power the Block Down Converter.

The 18V can be removed from the “N” connector by power

connector J41 on the INTRAC Interface board.

Signal Strength Input Where no IBR-L is fitted the INTRAC-305 requires a dc

voltage generated by an external receiver. This voltage must be directly proportional to the received signal strength in dB. The signal strength input is via a BNC connector on the INTRAC rear panel.

Resolvers (pointing angles) Setting the INTRAC-305 for the antenna pointing angles is

achieved by use of the “Fine Tune” sense and offsets facility.

Fine Tune Sense is used to set the INTRAC for the rotational

direction of the resolvers. Fine Tune Offset is used to adjust the resolver returned angle to the actual antenna pointing angle. i.e., to compensate for any inaccuracy in the resolver mounting.

Ensure that the “Fine Tune Sense” is set to true (see page

35) for both Az, El & Pol. Also clear the “Fine Tune Offsets”

(see page 36).

With the resolvers connected to the INTRAC-305 note down

the displayed Az, El and Pol antenna pointing angles

Put the INTRAC into Manual Mode. Fine Tune Sense Drive the antenna slowly in Az using the “drive right” key, note

whether the displayed angle increases or decreases. Return the antenna to the original pointing angle. Drive the antenna slowly in El using the “drive up” key, note whether the displayed angle increases or decreases. Drive the antenna

polarisation slowly clockwise using the “drive right” key, note

whether the displayed angle increases or decreases.

For the axes where the displayed angle increased leave the

Fine Tune Sense set to true. For the axes where the displayed angle decreased set the sense to false.

Fine Tune Offsets Use the Fine Tune Offset facility to set the pointing angles to

those noted from the APC300 before it was disconnected.

Southern Hemisphere Set-up in the Southern Hemisphere is the same as for the

Northern Hemisphere except that the antenna rotation will be +/- 90 of North instead of +/- 90 of South.

INSTALLATION INTRAC-305

Selection of Southern or Northern Hemisphere within the

INTRAC is automatic based on a positive or negative input for Latitude in System Setup - Station Co-ordinates.

TRACKING SIGNAL INPUT The tracking signal may be provided as a dc voltage from an

external receiver or from the optional IBR-L internal receiver.

With IBR-L The IBR-L requires a L-band beacon signal at a level within

the range -80dBm to -45dBm with a carrier to noise ratio (C/No) of better than 40dBHz. To allow some margin for exceptional propagation conditions we suggest that the normal clear sky level when peaked on the satellite should be in the range -70dBm to -50dBm. Severe signal fades will be handled by the INTRAC algorithm entering Prediction mode for the duration of the fade.

If the signal is greater than -50dBm attenuation must be

inserted and if it is lower than -80dBm a higher gain LNA/LNB must be used.

An input level of -45dBm corresponds to a displayed level of

+25dB.

Note In some installations the LNA/LNB power is carried on the L-

band signal cable and special arrangements have to be made to ensure continuity for the dc power when attenuation is added in this cable.

Without IBR-L The tracking signal, provided from an external receiver, needs

to be a dc voltage between -10v and +10v. This voltage should vary proportionally (in dBs) with the received signal strength.

The INTRAC can be adjusted for a fixed offset and a

proportionality constant between 0.1v/dB and 1.0v/dB in either polarity.

Setting offset & gain Connect a switchable attenuator in the IF feed to the tracking

(beacon) receiver.

Connect the dc tracking signal to the INTRAC Signal Strength

Input BNC. Remove the top cover to the INTRAC-305. Link J31 and potentiometers R12 & R55 are used in the set-

up. Link J31 can be changed for -ve or +ve polarity signals. R12 adjusts the gain of the tracking signal buffer. R55 adjusts the offset.

Set the switchable attenuator to 0 dB. Adjust R55 so that the signal level displayed on the

INTRAC-305 is between -10dB and +20dB. Adjust R12 so that 2dB attenuation of the receiver IF signal

causes the displayed signal to decrease by 2.0dB.

6

INTRAC-305 INSTALLATION

Finally adjust R55 to read +20dB when the maximum clear

sky tracking signal is being received.

Note It may be necessary to adjust the links J31 depending on the

polarity of the tracking signal. The link options are both links should be either vertical or horizontal.

OPERATIONAL CHECKS Manual Operation This test checks the operation of the motor drives and limit

switches.

Ensure that all limit and interlock switches are in the normal

operating condition.

Switch on the INTRAC. If the System Alarm indicator

illuminates press the Standby key. If it remains illuminated view the Show Alarms display to what is causing the alarm.

Take the necessary action to clear the cause(s) of the alarm. Select Manual (P) Mode from the New Mode menu. Using the Manual Control keys drive the antenna to the full

extent of its travel in each direction. Confirm that the antenna

actually moves in the required direction. Check that when a

limit switch is reached the motor stops and the System Alarm

indicator illuminates. Note Only one Manual Control key should be pressed at one time

and it should be fully released before pressing another control

key. If a Dual Speed Motor Drive Cabinet is fitted check that the

“FAST” key operates correctly. Pressing the “FAST” key

when pressing a Manual Control key should latch fast drive in

the required direction. Pressing any Manual Key when in

latched Fast Drive should have no effect. Pressing the Fast

key again should remove drive.

Emergency Stop Check Check the operation of the front panel Emergency Stop

switch by pressing it when one or more motor’s is running.

Ensure that the motor(s) stop and will not re-start until the

Emergency Stop switch is released and the and the

appropriate drive command re-instated.

INSTALLATION INTRAC-305

If external emergency stop switches are fitted check their

operation in the same way.

It must not be possible to re-start any motor whilst any

emergency stop switch is in the operated state.

Auto Operation After manually pointing the antenna towards the required

satellite use the Search facility to peak the antenna on the satellite. Check that this function works correctly.

Select Auto New Model and check that INTRAC enters

Learning Mode and makes periodic cross scans interspersed with pointing adjustments.

Check that after 24 hours of Learning the INTRAC enters

Tracking Mode.

Remote Control If a Remote Control and Monitoring Terminal (RCM-4)

package has been supplied check that this works correctly.

7

WARNING

POSSIBLE LETHAL POTENTIALS EXIST WITHIN THIS EQUIPMENT

THE COVERS SHOULD NOT BE REMOVED EXCEPT BY QUALIFIED PERSONNEL.

SWITCH OFF POWER AND ISOLATE SUPPLY BEFORE REMOVING COVERS.

IF IT IS NECESSARY TO OPERATE THE EQUIPMENT WITH THE COVERS

REMOVED FOR SERVICING PURPOSES ALL NECESSARY PRECAUTIONS

SHOULD BE TAKEN TO PROTECT AGAINST ELECTRIC SHOCKS

INTRAC-305 FAULT FINDING

7. FAULT FINDING

Introduction Advantech AMT Limited recommend that users return faulty

INTRAC-305 units to Advantech AMT Ltd. for repair.

Advantech AMT Ltd. have a specially equipped repair facility

and are able to repair and return a unit rapidly if required.

However if the problem is of an intermittent nature it may be

beneficial to allow us to soak test the unit for a longer period.

A replacement unit may be available from Advantech AMT

Ltd. during the repair period. Please ask for details of this

service. Repairs carried out by Advantech AMT Ltd. are warranted for

90 days. For those users who would prefer to repair their own unit this

section is intended to help with locating the faults. However : Advantech AMT LIMITED ACCEPT NO RESPONSIBILITY

OR LIABILITY FOR ANY HARM CAUSED TO ANY THIRD

PARTY PERSONNEL FROM WORKING INSIDE THE

INTRAC-305. Advantech AMT LIMITED ACCEPT NO RESPONSIBILITY

OR LIABILITY FOR ANY DAMAGE CAUSED TO THE

INTRAC-305 BY ANY THIRD PARTY PERSONNEL AS A

DIRECT OR INDIRECT RESULT OF THIS SECTION OF

THIS MANUAL. ANY THIRD PARTY WORK INSIDE THE INTRAC-305

DURING THE WARRANTY PERIOD WILL INVALIDATE

THE WARRANTY

Because the INTRAC-305 forms part of a system, parts of

which respond to signals from the INTRAC-305 and parts of

which send signals to the INTRAC-305, deciding whether a

fault lies with the INTRAC-305 or the external equipment can

be difficult. The simplest method to prove if the fault lies with the

INTRAC-305 or some other equipment is to replace the

INTRAC with a spare unit. However care must be taken in

such a case that any fault with the external equipment does

not cause damage to the replacement INTRAC. Also you

must ensure that the replacement unit is set correctly for the

installation.

Voltages should be within 5% of stated values

FAULT FINDING INTRAC-305

This fault finding guide goes no further than the replacement

of the major assemblies such as power supply, IBR-L or

complete printed circuit assemblies. The INTRAC-305 consists of six major assemblies :  Main Interface PCB

 Processor PCB  Low voltage power supply  LCD Display panel  Front panel keys assembly  Beacon receiver (optional)

Note The LCD display panel has a replaceable backlight which has

a finite life span. This light will need replacing within the

working life of the INTRAC-305. Included in this section are

instructions on replacing the lamp.

FAULT SYMPTOMS

INTRAC doesn’t appear Check that the main power-on switch glows green when

to power up switched on. If not check INTRAC fuse, power cable and

power source Display screen blank/dark Data is visible on screen but display is very dark.

Try to adjust display brightness and contrast. Contrast

adjustment has some effect but brightness has none. LCD backlight or its inverter has failed.

Note To adjust brightness or contrast press menu keys 2 - 4 - 5

followed by the Enter key. Menu key 4 will now control

brightness and menu key 3 will control contrast. Display is bright but there is no data visible. Brightness

control has some effect but contrast does not. Check power supply voltages :-

 V1 = +5v to com )  V2 = +15v to com )  V3 = 12v across + &  )  V4 = 24v across + &  )

If voltages are correct fault is with LCD, ribbon cable to J18

(Interface PCB) or the Interface PCB itself.

Replacing the LCD backlight This section applies only to units fitted with a display with a

fluorescent tube backlight (blue display). Some units may be

fitted with a LED backlight display (grey display) which do not

require replacement of the backlight. Remove the top cover from the INTRAC-305. The rear of the

LCD panel is then visible.

7

TWO PART

RETAINING PIN

INTRAC-305 FAULT FINDING

Disconnect the two lamp wires from the orange connector at

the front corner of the Interface PCB. Disconnect the LCD panel flex cable from Connector J64 on the Interface PCB.

Remove the four screws which hold the INTRAC front panel

to the sides and drop down the front panel. Remove the four nuts which hold the display assembly to the front panel and remove the display unit from the front panel. Lay it face down on a soft surface.

Press down on the centre of the two retainers (see diagrams)

Turn the display face up. Remove the retainer pins. Remove

the metal cover.

Turn the display face down on a soft surface. Gently slide the

backlight unit from the display unit. (see diagram)

Remove the three tapes which secure the lamp reflector. Remove the lamp and wire assembly.

FAULT FINDING INTRAC-305

Install new lamp and wire assembly. Wrap reflector sheet around lamp. Replace securing tapes to secure reflector. Turn unit face up and ensure that backlight is free from

contamination - dust may be blown free. Slide backlight into display unit. Replace metal cover over backlight. Replace retainers, press centre to secure. Locate display unit over the four studs and fit the nuts. Re-fit INTRAC front panel to side panels, reconnect flex cable

and lamp wires. Replace INTRAC top cover, reconnect power, switch on and

verify that the lamp illuminates.

Some, or all, front panel The six menu keys, the numerical keypad and the manual keys do not function control keys are all connected in a matrix. There are three

supply lines to the matrix and eight return lines. If any one of

these lines fails at least three keys will cease to function. The

fault may be the ribbon cable to J27 (Interface PCB), the

connectors or the Interface PCB itself. If only one key does not function the fault will be with that key

and the front panel PCB will have to be replaced. This board

is held on the front panel by six threaded studs. Disconnect

the ribbon cable and the emergency stop switch (note which

wire goes to which terminal). Remove the six nuts and lift the

PCB off the studs.

Emergency Stop Switch Fails Pressing the front panel emergency stop switch should cause

the System Alarm indicator to illuminate and the INTRAC to

enter Standby Mode. The switch consists of two normally closed (N.C.) contacts

pressing the switch opens both sets of contacts. The switch

connects to the Interface PCB through the front panel PCB

and the ribbon cable. If the switches are OK and there is

continuity to connector J27 on the Interface board the fault is

on that board.

Pointing Angles Incorrect The resolvers consist of three coils two of which move with

respect to the third. A continuous signal is sent from the

INTRAC to the fixed coil and is induced into the other two

coils. The amount of induction in each coil is dependant on

the respective position of the coils. The signal sent from the INTRAC is the same for all

resolvers. angles constantly varying Constantly changing angles is caused by noise on the two

return signal lines. This implies that the source signal is not

present in the resolver. For one angle (i.e. Az, El or Pol) to

be changing either the circuit to the resolver is broken or the

resolver itself is faulty.

7

Direction

& Speed

Az

East

Az

West

Az

Fast

Az

Slow

El

Down

El

Up

El

Fast

El

Slow

Pol

CCw

Pol Cw

+12 volts

18

19

20

21

22

23

24

25

26

27

Ground

1 2 3 4 5 6 7 8 9

10

INTRAC-305 FAULT FINDING

If all the angles are changing the fault is on the Interface

PCB.

wrong angle displayed If the displayed angle changes to be near 0 or 90 it is

probable that one of the two return signal circuits from the resolver is broken or the resolver itself is faulty.

If the displayed angle changes to any angle other than near

0 or 90 the fault is on the Interface PCB.

angle doesn’t change If the displayed angle doesn’t change when the antenna is when antenna is moved being driven first ensure that the antenna is actually moving in

the relevant plane. Select Manual Mode and drive the antenna in the appropriate direction and either check that the beacon level changes or actually look at the antenna.

If the antenna moves but the displayed angle does not

change the problem is the connection of the resolver to the antenna.

No Antenna Drive Check that the LEDs in the Manual Control keys illuminate

when antenna drive is commanded. If not the fault is on the Interface PCB.

The Motor Controls connector (50-way D-type) on INTRAC

rear panel outputs +12v and ground to for each drive signal. The +12v and ground levels are switched to the approriate pins of the connector by relays. One relay switches +12v for all Az drive commands, another does so for all El drive commands and a third for Pol drive. The ground level is switched by changeover relays, one does Az West or East, another Az Fast or Slow, another El Down or Up, another El Fast or Slow and another for Pol CCW or CW.

The table below indicates across which two pins of the 50

way connector there should be 12v for each drive condition.

example Elevation Up Fast - there should be 12v across pins 23 & 6

(El Up) and across 24 & 7 (El Fast).

If the drive signals from the INTRAC are correct the fault lies

with the Motor Drive Cabinet, the antenna drive motors or the intervening wiring.

FAULT FINDING INTRAC-305

Tracking Signal (IBR-L) If the beacon signal falls to a non-usable level the INTRAC

automatically enters Predicting Mode and continues to track

the satellite from the model. There is no way of knowing from

the INTRAC whether the loss of signal is due to the satellite

or the IBR-L. Thus when the displayed beacon level falls

below normal the user should check the signal by some other

means before assuming an IBR-L problem. The beacon

should be checked with a spectrum analyser on a narrow

sweep range so that the actual beacon frequency can be

seen and measured. Although the loss of or reduction in displayed beacon level

could be caused by a fault on the Interface PCB the most

likely cause is a faulty IBR-L.

8

INTRAC-305 WARRANTY & REPAIR

8. WARRANTY & REPAIR

WARRANTY Advantech AMT Limited warrants the INTRAC-305 Antenna

Control Unit, the (optional) IBR-L integral L-band beacon receiver and other associated products designed, manufactured and supplied by Advantech AMT Limited for a period of 365 days from the date of delivery.

The liability of Advantech AMT Limited under this warranty

shall be limited to repair or replacement of defective units or

parts thereof, at Advantech’s option, which are returned,

carriage and insurance paid, to Advantech AMT Limited, 39 Edison Road, St.Ives, Cambridgeshire, PE27 3LF, England. The returned unit(s) must be accompanied by a document declaring that the equipment is returned for repair under warranty and describing clearly and fully the reason for the return of the unit.

Subject to the unit being eligible for warranty repair

Advantech AMT Limited will effect the repair and return the unit by pre-paid shipment to the originating location. Subject to the shipment charges being the same as, or less than, that to the original location the unit may be shipped to some other location as the customer may specify.

Under no circumstances shall Advantech AMT Limited be

liable for any consequential or incidental costs or damage.

Exclusions This warranty does not apply to any equipment which has

been damaged through abuse, accident (such as lightning strike), negligence or failure to comply with Advantech AMT Ltd instructions for storage, installation and use as contained in the equipment manual(s).

Except as specifically provided above Advantech AMT

Limited makes no warranties, expressed or implied, as to the merchantability or fitness for a particular purpose.

REPAIR SERVICE Advantech AMT Limited will provide a repair service for all

equipment manufactured by Advantech AMT Limited for a period of ten (10) years.

Returning equipment for repair Prior to the return of any equipment for repair, whether under

warranty or by payment, Advantech AMT Limited must be contacted. The purpose of this contact is to discuss the problem and confirm that equipment needs to be returned. Also to agree the most effective solution to the problem and to discuss the method of return in order to avoid unnecessary duties and ensure that the packing is adequate to protect the equipment during shipment.

The cost of returning the equipment to Advantech AMT

Limited will be paid by the customer.

Repairs not under warranty Repairs to equipment not under warranty will be paid for by

the customer. On receipt of the defective unit Advantech

WARRANTY & REPAIR INTRAC-305

AMT Limited will investigate the fault, determine the most

effective repair technique and issue a repair cost estimate. Repair work will not commence until the cost is authorised by

the customer either by a Purchase Order or through a Repair

Contract. In certain circumstances repairs may be carried out on site by

prior agreement. Documentation On completion of the repair the unit(s) will be returned to the

customer together with a Repair Report and a repair contact

name at Advantech AMT Limited. Return shipment The repaired unit(s) will be returned to the originating location

with Advantech AMT Limited bearing the cost of shipment

and in transit damage or loss. The equipment may be returned to some other location at the

request of the customer subject to the shipment cost being

the same as, or less than, that to the original location. Invoices for repairs not covered by a warranty will be issued

at the time the equipment is despatched. The Invoice(s)

is/are payable within 30 days. Warranty of repairs Advantech AMT Limited will warrant the repaired unit, in

respect of the work and material of the repair, for a period of

ninety (90) days from the date of return of the unit to the

customer. However where the remaining time of the standard

warranty exceeds 90 days the repaired unit will be warranted

for that remaining period.

NOTE Advantech AMT Limited reserves the right to charge for

rectification of any faults caused as a result of attempts to

repair equipment by third parties.

Advantech INTRAC-305 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual