Fugro OmniSTAR 8305HP User manual

OmniSTAR 8305HP
User Manual
Issue 1.14, October 2010

OmniSTAR 8305HP User Manual
Issue 1.14, 10/2010
ii
Notice to Customers
This manual has been produced to ensure the very best performance from
your OmniSTAR receiver. The manual has been clearly set out with simple
instructions to ensure trouble free usage of your OmniSTAR receiver.
This publication could contain technical inaccuracies or typographical errors.
Changes are periodically made to the information herein; these changes will
be incorporated in new editions of the manual.
Should you require further assistance please contact your local dealer or the
OmniSTAR B.V. office.
OmniSTAR Customer Support and 24-Hour Help Line
The Netherlands:
OmniSTAR B.V.
Dillenburgsingel 69
2263 HW Leidschendam
The Netherlands
Tel: [phone]
Fax: [phone]
Web: www.omnistar.nl
E-Mail: [email protected]
Australia: South Africa:
OmniSTAR Pty Ltd OmniSTAR Pty Ltd
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: + 27 11 312 1774
Web: www.omnistar.com.au Web: www.omnistar.co.za
E-Mail: [e-mail] E-Mail: [email protected]
Singapore: USA:
Fugro OmniSTAR Pte Ltd OmniSTAR Inc.
Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
E-Mail: [email protected].sg Web: www.omnistar.com
E-Mail: [e-mail]

OmniSTAR 8305HP User Manual
Issue 1.14, 10/2010
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One-Year Limited Hardware Warranty
OmniSTAR B.V and its operating companies world-wide (OmniSTAR),
warrants this product to be free from defects in workmanship and material for a
period of one year from the date of original sale by OmniSTAR or its
authorised dealers, to the original purchaser or end user.
OmniSTAR reserves the right to repair and/or replace, at its option, any part or
parts found to be defective, provided such defects, in their opinion, are due to
faulty material or workmanship and are not caused by unauthorised or
improper repair or abuse, or normal wear. Purchaser shall be responsible for
shipping and insurance of the returned product for repair under this warranty.
OmniSTAR will pay shipping and insurance for the product's return to
purchaser provided that the product returned proves to be defective under this
limited warranty.
This warranty applies only to normal usage of the product. It does not apply to
units or electronic circuit boards defective due to improper installation or
handling. Physical damage due to lightning or other electrical discharge and
units subjected to fresh or salt-water contamination are not covered.
OmniSTAR reserves the right not to warrant the product if, upon request,
sufficient proof of recommended installation compliance as laid out in this
manual is not provided. No other warranties are expressed or implied. No other
warranties exist.
OmniSTAR assumes no responsibility for any consequential or incidental
losses or damages of any nature with respect to the use of this product.
Manual Reference: OmniSTAR 8305HP User Manual
Copyright OmniSTAR B.V. 2010. No part of this manual can be reproduced
without the express permission of OmniSTAR B.V.

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Issue 1.14, 10/2010
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REVISION HISTORY
Issue 0.1 October 2006 First Issue
Issue 0.2 October 2006 Minor changes
Issue 0.3 March 2007 Major overhaul: checked and corrected
specifications, added View8300 /
Viewall, added command set
Issue 1.0 March 2007 Comments on version 0.3
incorporated. First official release.
Issue 1.01 March 2007 Textual changes
Issue 1.1 March 2007 Added description of log header and
firmware upgrade procedure
Issue 1.11 May 2007 Added userdatum commands and
command for logging debug-data
Issue 1.12 October 2008 Corrected information about the
‘EVENT’ marker inputs.
Issue 1.13 September 2009 Changed EASAT to EUSAT and
modified frequencies
Issue 1.14 October 2010 Added OMNIUSEGLONASS ENABLE
command
Added Omnistar IP (NTRIP Info

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TABLE OF CONTENTS
INTRODUCTION.............................................................................................2
A BOUT T HIS M ANUAL .....................................................................................2
S YSTEM F EATURES ........................................................................................2
R ECEIVER F EATURES .....................................................................................3
Housing....................................................................................................3
Interface...................................................................................................4
INSTALLATION AND SET UP ........................................................................6
I NSTALLATION C ONSIDERATIONS .....................................................................6
C OUNTER E LECTROMAGNETIC F ORCE (CEMF)................................................7
C ABLE I NSTALLATION .....................................................................................8
A DDITIONAL F EATURES AND I NFORMATION .......................................................9
Strobes.....................................................................................................9
Status Indicators.......................................................................................9
Mounting Bracket....................................................................................10
A NTENNA L OCATION .....................................................................................11
P OWER S UPPLY R EQUIREMENTS ..................................................................11
OPERATING CONSIDERATIONS.................................................................12
N UMBER OF VISIBLE SATELLITES ....................................................................12
M ULTIPATH ..................................................................................................12
P OSITION D ILUTION OF P RECISION (PDOP)...................................................13
S ATELLITE ELEVATIONS ................................................................................13
D IFFERENTIAL CORRECTIONS ........................................................................13
OPERATION.................................................................................................14
C OMMUNICATIONS WITH THE R ECEIVER .........................................................14
Serial Port Default Settings.....................................................................14
G ETTING S TARTED .......................................................................................15
Starting the Receiver..............................................................................15
I NITIAL SETUP ..............................................................................................16
S ETTING UP DATA OUTPUT ............................................................................17
S EEDING THE RECEIVER ...............................................................................18
Using a stored seed position ..................................................................18
Entering a known position manually........................................................18
APPENDIX A.................................................................................................20
T ECHNICAL S PECIFICATIONS .........................................................................20
Performance...........................................................................................20
Environmental ........................................................................................20
Power Requirements..............................................................................21
RF input / LNA power output...................................................................21
Input / Output data interface...................................................................21
Input / Output connectors .......................................................................21
Physical..................................................................................................22
Dimensions ............................................................................................23

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Port Pin-Outs..........................................................................................24
C ABLES .......................................................................................................26
Automobile Power Adapter Cable...........................................................26
Null modem Cable..................................................................................27
Straight through DB9 Serial Cable..........................................................28
USB Serial Cable....................................................................................29
Strobe port cable....................................................................................30
APPENDIX B.................................................................................................31
V IEW 8300...................................................................................................31
V IEW A LL .....................................................................................................42
ViewAll main screen...............................................................................42
APPENDIX C.................................................................................................52
C OMMANDS .................................................................................................52
ANTENNAPOWER.................................................................................52
ASSIGNLBAND......................................................................................53
AUTH .....................................................................................................54
COM.......................................................................................................55
DGPSTIMEOUT.....................................................................................57
ECUTOFF ..............................................................................................57
FRESET.................................................................................................59
GGAQUALITY........................................................................................60
HPSEED ................................................................................................61
HPSTATICINIT.......................................................................................62
LOG........................................................................................................63
MARKCONTROL....................................................................................65
MODEL ..................................................................................................66
NVMRESTORE......................................................................................66
OMNIUSEGLONASS .............................................................................68
PPSCONTROL.......................................................................................68
PSRDIFFSOURCE / RTKSOURCE........................................................69
RESET...................................................................................................69
SAVECONFIG........................................................................................70
UNLOG ..................................................................................................71
UNLOGALL............................................................................................72
USERDATUM.........................................................................................72
D ATA L OGS .................................................................................................74
L OG MESSAGE HEADERS ...............................................................................74
BESTPOS ..............................................................................................76
Message ID: 42 Log Type: Synch.......................................................76
COMCONFIG.........................................................................................77
LBANDINFO...........................................................................................79
LBANDSTAT..........................................................................................79
LOGLIST................................................................................................79
MARKPOS, MARK2POS........................................................................81
MARKTIME, MARK2TIME......................................................................83
OMNIHPPOS .........................................................................................84
PSRDOP................................................................................................84

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PSRPOS................................................................................................85
PSRVEL.................................................................................................86
RXCONFIG ............................................................................................87
RXHWLEVELS.......................................................................................89
RXSTATUS............................................................................................90
TIME.......................................................................................................94
VALIDMODELS......................................................................................96
VERSION...............................................................................................96
APPENDIX D.................................................................................................99
NMEA 0183 M ESSAGE O PTIONS ..................................................................99
NMEA 0183 M ESSAGE F ORMATS ...............................................................100
ALM – GPS Almanac Data...................................................................100
GGA – GPS Fix Data............................................................................101
GGALONG – GPS Fix Data Extra Precision and Undulation ................102
GGARTK – GPS Fix Data Extra Precision without Undulation..............103
GLL – Geographic Position – Latitude/Longitude..................................104
GRS – GPS Range Residuals..............................................................104
GSA – GPS DOP and Active Satellites.................................................105
GST – GPS Pseudorange Noise Statistics...........................................106
GSV – GPS Satellites in View .............................................................. 107
RMB – Navigation Information..............................................................108
RMC – Recommended Minimum Specific GPS Data ...........................109
VTG – Course Over Ground and Ground Speed ..................................110
ZDA – Time and Date...........................................................................110
O MNI STAR LOGS MESSAGE FORMATS .........................................................111
OMNIHPPOS – OmniSTAR HP Position.........................................111
LBANDINFO – OmniSTAR Configuration Information.....................113
LBANDSTAT – OmniSTAR Status Information ...............................115
32-Bit CRC...........................................................................................118
APPENDIX E...............................................................................................119
U PGRADING THE RECEIVER FIRMWARE .........................................................119
APPENDIX F...............................................................................................124
A CRONYMS USED IN THIS MANUAL ...............................................................124
APPENDIX F...............................................................................................125
GPS T IME OF W EEK T O W EEK AND T IME OF D AY .........................................125
Example: 511200 s...............................................................................125
C ALENDAR D ATE TO GPS T IME ...................................................................125
Example: 14:30 hours, March 5, 2007..................................................125
APPENDIX G ..............................................................................................126
R ECEIVER S ERVICE P ROCEDURE ................................................................126
APPENDIX H............................................................................................... 127
O MNI STAR R ECEIVER P ROBLEM R EPORT F ORM .........................................127

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USER NOTES.............................................................................................128
LIST OF FIGURES
Figure 1: 8305HP Back End............................................................................5
Figure 2: Zener Diode Connected....................................................................7
Figure 3: 8305HP with Mounting Brackets (dimensions in millimetres)..........10
Figure 4: Multipath.........................................................................................12
Figure 5: 8305HP Dimensions (all dimensions are in millimetres). ................23
Figure 6: Automobile Power Adapter Cable...................................................26
Figure 7: null modem DB9 Serial Cable.........................................................27
Figure 8: Straight through DB9 Serial Cable..................................................28
Figure 9: USB to DB9 serial cable (dimensions in millimetres)......................29
Figure 10: Strobe port cable..........................................................................30
Figure 11 View8300 communication settings.................................................31
Figure 12 View8300 main screen ..................................................................32
Figure 13 Receiver COM port selection.........................................................33
Figure 14 Receiver COM port settings...........................................................33
Figure 15 View8300 Configuration menu.......................................................34
Figure 16 DGPS service configuration...........................................................35
Figure 17 Datum configuration.......................................................................36
Figure 18 Select COM port to be configured for output..................................36
Figure 19 NMEA message output selection...................................................37
Figure 20 1PPS control .................................................................................37
Figure 21 Receiver parameter configuration..................................................38
Figure 22 Setting seed point..........................................................................39
Figure 23 Current position and StdDev as seed point....................................39
Figure 24 View8300 terminal window.............................................................40
Figure 25 Sky plot and scatter plot view ........................................................41
Figure 26 View8300 about screen .................................................................41
Figure 27 Connection screen Figure 28 ViewAll main screen....................42
Figure 29 Position screen (1) Figure 30 Position screen (2)......................42
Figure 31 Position screen (3) Figure 32 Position screen (4)......................43
Figure 33 Position screen (5) Figure 34 Position screen (6)......................43
Figure 35 Position screen (7) Figure 36 Hardware information..................44
Figure 37 VBS subscription Figure 38 HP subscription .............................44
Figure 39 DGPS/HP info................................................................................45
Figure 40 Sat Configuration Figure 41 Receiver parameters.....................45
Figure 42 COM1 configuration Figure 43 COM2 configuration ..................46
Figure 44 COM3 configuration.......................................................................46
Figure 45 Logging start screen Figure 46 σ
z
..............................................47
Figure 47 Satellite info Figure 48 Date and time........................................47
Figure 49 Speed and filtering Figure 50 Project name...............................48
Figure 51 Surveyor name Figure 52 Antenna height .................................48
Figure 53 Internal memory Figure 54 Storage card memory......................49
Figure 55 Main settings Figure 56 Filter settings.......................................49
Figure 57 Kickstart point................................................................................50

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Figure 58 Terminal window Figure 59 HP Debug logging..........................50
Figure 60 ViewAll Exit....................................................................................51
Figure 61 WinLoad main screen..................................................................119
Figure 62 Firmware file select......................................................................120
Figure 63 Winload main screen - flash file loaded.......................................120
Figure 64 Winload searching for card..........................................................121
Figure 65 Initializing communication............................................................121
Figure 66 Entering the authorization code ...................................................122
Figure 67 Erasing memory and writing data to the receiver.........................122
Figure 68 Upgrade finished..........................................................................123
LIST OF TABLES
Table 1: 8305HP Interface...............................................................................5
Table 2: 8305HP I/O port pin-out descriptions.................................................9
Table 3: 8305HP PWR port pin-out descriptions............................................24
Table 4: 8305HP serial port pin-out descriptions ...........................................24
Table 5: 8305HP I/O port pin-out description.................................................25
Table 6: Figure 6 Reference numbers description .........................................26
Table 7: null modem pin layout......................................................................27
Table 8: Figure 8 Reference numbers descriptions........................................28
Table 9: Figure 9 Reference numbers description .........................................29
Table 10: Strobe port cable layout.................................................................30
Table 11: Description of the assignlband command ......................................53
Table 12 Description of the auth command ...................................................54
Table 13: Description of COM command.......................................................55
Table 14: Serial port identifiers for COM command .......................................56
Table 15: Parity.............................................................................................56
Table 16: Handshaking..................................................................................56
Table 17 Description of the ECUTOFF command..........................................58
Table 18 Description of the FRESET command............................................59
Table 19 Position types.................................................................................60
Table 20 Description of the HPSEED command............................................61
Table 21 Description of the HPSTATICINIT command..................................62
Table 22: Description of the LOG command..................................................64
Table 23: Description of the MARKCONTROL command..............................65
Table 24: Description of the MODEL command.............................................66
Table 25: Description of the PPSCONTROL command.................................68
Table 26: Description of the RESET command. ............................................69
Table 27: Description of the UNLOG command.............................................71
Table 28: Description of the UNLOGALL command. .....................................72
Table 29: Description of the UNLOGALL command. .....................................73
Table 30: Available OmniSTAR specific logs.................................................74
Table 31: Log header structure......................................................................75
Table 32: GPS time status.............................................................................76
Table 33 Bestpos log description...................................................................77
Table 34 Comconfig log description...............................................................78
Table 35: Interface modes.............................................................................79

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Table 36 Loglist log description .....................................................................80
Table 37 Markpos and Mark2pos log description...........................................82
Table 38 Marktime and Mark2time log description.........................................83
Table 39 PSRDop log description..................................................................85
Table 40 PSRpos log description...................................................................86
Table 41 PSRvel log description....................................................................87
Table 42 RXConfig log description.................................................................89
Table 43 RXHWlevels log description............................................................90
Table 44 Receiver error.................................................................................91
Table 45 Receiver status...............................................................................92
Table 46 Auxiliary 1 status.............................................................................93
Table 47 Auxiliary 2 status.............................................................................93
Table 48 Auxiliary 3 status.............................................................................93
Table 49 RXStatus log description.................................................................94
Table 50 Time log description........................................................................95
Table 51 Validmodels log description ............................................................96
Table 52 Model designators...........................................................................97
Table 53 Time log description........................................................................98
Table 54: NMEA 0183 messages available for the 8305HP...........................99
Table 55: Description of the ALM message.................................................100
Table 56: Description of the GGA message.................................................101
Table 57: Description of the GGALONG message.......................................102
Table 58: Description of the GGARTK message..........................................103
Table 59: Description of the GLL message..................................................104
Table 60: Description of the GRS message.................................................104
Table 61: Description of the GSA message.................................................105
Table 62: Description of the GST message.................................................106
Table 63: Description of the GSV message.................................................107
Table 64: Description of the RMB message.................................................108
Table 65: Description of the RMC message. ...............................................109
Table 66: Description of the VTG message................................................110
Table 67: Description of the ZDA message. ................................................110
Table 68: Solution Status ............................................................................111
Table 69: Description of the OMNIHPPOS message...................................112
Table 70: Description of the LBANDINFO message....................................113
Table 71: Subscription types .......................................................................114
Table 72: Description of the LBANDSTAT message....................................115
Table 73: OmniSTAR Signal Tracking Status..............................................116
Table 74: OmniSTAR VBS Status Word/HP Status Word 1........................116
Table 75: OmniSTAR HP Additional Status Word .......................................116
Table 76: OmniSTAR HP/XP Status Word .................................................117

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Introduction
About This Manual
This manual has been produced to assist the typical user with the installation
and operation of the OmniSTAR 8305HP DGPS Receiver.
System Features
The OmniSTAR 8305HP DGPS Receiver is part of a worldwide DGPS
Service. The OmniSTAR service is a full-time differential GPS (DGPS)
broadcast system delivering corrections from an array of GPS reference
stations located around the globe. Reference stations provide industry
standard formatted corrections to Network Control Centres (NCCs) at strategic
geographic locations, where the corrections are decoded, checked, and
repackaged in a highly efficient format for broadcast. The data is modulated
onto a RF carrier that is then up-converted for transmission to an L-band
communications satellite.
The signals are received at the user's location by an antenna, demodulated by
a receiver, and are made available, after selection of the desired individual
reference site's data set, as corrections for use in a GPS, differential-capable,
receiver.
The OmniSTAR 8305HP series of receivers support the following OmniSTAR
®
services:
HP, this is the High Performance service where dual frequency GPS carrier
phase measurements are used in an intelligent and innovative way to create
wide area positioning results of unmatched accuracy and performance.
XP, this is the Extended Position service where precise orbit and clock data is
used to determine the position worldwide without using any reference stations.
VBS, this is the Virtual Base Station service where single frequency GPS code
phase measurements are used to create RTCM corrections data optimised for
the users current position.

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Receiver Features
The OmniSTAR 8305HP receiver has the following features:
•28 channel “all-in-view” parallel GPS tracking
•6 channel GPS L5 prepared
1
•2 SBAS channels
•24 channel “all-in-view” parallel Glonass tracking
2
•Pulse Aperture Correlator (PAC) technology
•Fast reacquisition
•Fully field-upgradeable firmware
•Low power consumption
•5 Hz position output data (20 Hz optional)
•Voltage and temperature monitoring and reporting
•Auxiliary strobe signals (input and output)
The following models are available for the 8305HP:
•L1 only
•L1/L2
•L1/L2 plus OmniSTAR HP/XP
Housing
The 8305HP is housed in an enclosure to provide a complete receiver solution.
When connected to an antenna and a power source, the 8305HP is a fully
functioning DGPS/HP receiver.
The enclosure offers protection against environmental conditions and RF
interference. In addition, it provides an easy-to-use interface to the GPS card’s
data, power and status signals and a rugged, water, shock and vibration
resistant housing for outdoor applications.
1
The 8305HP receiver is hardware-capable of tracking L5 but requires a future firmware
upgrade to enable L5 positioning. This upgrade will be available when a usable
number of L5 capable satellites are in orbit.
2
Glonass capable antenna required.

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Interface
The 8305HP provides the following:
•A rugged, environmentally-sealed enclosure
•3 serial ports with standard RS232 D-connectors
•GNSS antenna and power ports
•An external oscillator connector
•Auxiliary strobe signals for status and synchronization
•Indicators to provide power and communication status
•Support of peripheral devices, including an Inertial Measurement
Unit (IMU) for combined GPS-inertial navigation
The following accessories are included with the 8305HP:
•1 automotive (12V) power adapter cable
•1 straight through serial port cable
•1 null modem serial cable
•1 USB serial cable
•1 I/O port cable
•1 combined L-band/GNSS antenna
•A CD containing PC utilities and product documentation
For technical specifications on the 8305HP, please see Appendix A

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Figure 1: 8305HP Back End
Port Type Description
Power LEMO
FGG.0B.304.CLAD52Z DC power input
COM1 DB9P RS232 signals (NMEA)
and USB
COM2 DB9P RS232 signals (NMEA)
COM3 DB9P RS232 signals (NMEA)
I/O DB9S I/O strobe signals
GPS TNC Antenna connection
OSC BNC External oscillator
connection
Table 1: 8305HP Interface

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Installation and Set Up
Installation Considerations
Before commencing installation of the OmniSTAR 8305HP in a vehicle or
aircraft, the following should be considered:
•Determine the preferred location for each unit. Consider cable length,
connector attachment space (cable bend radius), stowing excess cable,
moisture, chemical corrosion, vibration and heat exposure.
•Before drilling holes, consider using existing hardware and locations
where equipment was previously installed. Avoid drilling holes that may
damage other equipment (e.g. structural frame members, electrical
cables or fluid lines).
•High vibration and high temperature locations should be avoided
whenever possible.
•In application where vibration exceeds 5Gs acceleration, shock mounts
are required. (Refer to Customer support for mounting
recommendations).
•Vehicle primary power has voltages that may be harmful to personnel and
equipment. Disconnect the battery cable from the battery –Ve (negative)
terminal before making connection to any power terminal within the
vehicle.

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Counter Electromagnetic Force (CEMF)
A potential problem inherent in any installation of electronic systems within a
vehicle is Counter Electro-magnetic Force (CEMF).
CEMF is caused when relays or solenoids, connected to the vehicle DC power
distribution, are de-energised. The voltage produced may exceed 400 volts.
CEMF is produced by equipment such as the following:
•Electric fan brakes
•Air conditioners
•Starter relays
•Electric pump relays
CEMF is more than sufficient to damage or cause erratic operation of any
electronic system that is also connected to the same vehicle DC power supply.
CEMF can be eliminated by installing diodes at the relays and solenoids that
cause the problem, and more importantly at the power supply cable
connections on the receiver.
The 8305HP already has some built-in protection circuitry. Nevertheless, if you
suspect there might be a risk of damaging the receiver because it is exposed
to CEMF on a regular basis, a 47V, 5W, Zener diode (1N5368 or equivalent)
may be connected between the receiver +Ve (positive) power input terminal
and ground, as illustrated in Figure 2.
Figure 2: Zener Diode Connected
Ground
Battery +ve (positive) supply
Zener Diode

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Cable Installation
Cables must be correctly installed for optimum system operation. Therefore,
the following should be noted:
•Do not route an L-Band receiver remote antenna cable with the cabling of
any other radio system. This may cause interference between both
systems.
•If at all possible, do not run L-Band receiver antenna cables parallel to
other radio system cabling closer than 30 centimetres.
•If cables must cross, ensure that they cross at an angle of
90°. This minimises the possibility of interference.
•As far as is practicable, ensure that cables and I/O connectors are unique
and fit only in their allocated location.
•Avoid routing cables along-side power generator cabling and other high
electrical noise sources. This can cause interference.
•Do not kink or force cables into sharp bends that may damage the cables
and cause system failure.
•After installation, ensure that excess cable in looped and clamped or tied
safely away from any control cables, fuel lines, hydraulic lines or moving
parts.
•When stowing over length cables, form loops not less than
150 mm minimum cable bend radius.
•Cable routing must avoid high temperature exposure
(e.g. exhaust manifold).

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Additional Features and Information
This section contains information on the additional features of the 8305HP
receiver.
Strobes
On the 8305HP, a set of inputs and outputs that provide status and
synchronisation signals are given. These signals are called strobes. Access to
the strobe signals is obtained through the I/O port.
Strobe signals include two inputs (Event1 and Event2) and a One Pulse Per
Second output (PPS). See Table 2 for a complete description.
Pin no. Signal name Signal description
1 VARF Variable frequency out
2 PPS Pulse Per Second out
3 MSR Mark1 output
4 EVENT1
Mark1 input, which requires a pulse longer
than 65 ns. 10kOhm pull-up resistor to 3.3V
internal to the 8305HP.
Refer also to the MARKCONTROL
command.
5 PV Valid position available
6 EVENT2
Mark 2 input, which requires a pulse longer
than 400 ns. 10kOhm pull-up resistor to 3.3V
internal to the 8305HP.
Refer also to the MARKCONTROL
command.
7 _RESETOUT Reset TTL signal output to an external
system. Active low.
8 ERROR Indicates a fatal error when high.
9 GND Digital ground
Table 2: 8305HP I/O port pin-out descriptions
Status Indicators
The 8305HP has LED indicators that provide the status of the 8305HP. The
red LED above the power connector lights up when the 8305HP is powered.
The LEDs above the COM1, COM2 and AUX ports indicate the data flow over
these ports: the red LED indicates incoming data (data received by the
8305HP), the green LED indicates outgoing data (data sent by the 8305HP).

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Mounting Bracket
Along with the 8305HP, a mounting kit has been provided to facilitate
mounting the receiver to a surface. This section provides information on how
to mount the receiver.
Note: The mounting kit is not designed for use in high-dynamics or high-
vibration environments.
To install the mounting brackets provided with the 8305HP, refer to the
instructions provided with the mounting kit. Figure 3 is included to provide the
dimension information for the brackets.
Figure 3: 8305HP with Mounting Brackets (dimensions in millimetres)

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Antenna Location
Antenna positioning is critical to system performance.
The following conditions must be met for optimum system performance:
•Antenna must be mounted at least 1.5 metres away from transmitting
antennas of any frequency. Closer positioning may cause overloading of
receiver RF circuits.
•The antenna should be mounted at the highest practical point that will
give a good view of the horizon and be as near level as possible.
•The antenna must be located along the vehicle centre-line, or at a
relevant reference point on the vehicle.
Power Supply Requirements
The 8305HP contains a DC-to-DC converter that is very tolerant to noise and
ripple at its input. A tightly regulated input supply to the 8305HP is not
required, as long as it falls within the input range +6 to +18VDC.
The power supply used should be capable of delivering 5W peak power.
Warning: If the voltage supplied is below the minimum specification,
the receiver will suspend operation. If the voltage supplied
is above the maximum specification, the receiver may be
permanently damaged, voiding your warranty.