Hemisphere GPS V104n User manual

V104n GPS Compass
User Guide
Part No. 875-0347-0 Rev. A1

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation.
Copyright Notice
Copyright Hemisphere GNSS, Inc. (2014). All rights reserved.
No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system or translated into
any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical,
chemical, manual or otherwise, without the prior written permission of Hemisphere GNSS.
Trademarks
Hemisphere GNSS®, the Hemisphere GNSS logo, COASTTM, PocketMAXTM, Crescent®and VectorTM are proprietary
trademarks of Hemisphere GNSS, Inc. Other trademarks are the properties of their respective owners.
Patents
Hemisphere GNSS products may be covered by one or more of the following patents:
Other U.S. and foreign patents pending.
Notice to Customers
Contact your local dealer for technical assistance. To find the authorized dealer near you:
Hemisphere GNSS, Inc.
8444 N 90th St, Suite 120
Scottsdale, AZ 85258 USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.hemispheregnss.com
Technical Support
If you need to contact Hemisphere GNSS Technical Support:
Hemisphere GNSS, Inc.
8444 N 90th St, Suite 120
Scottsdale, AZ 85258 USA
Phone: [phone]
Fax: [phone]
techsup[email protected]
U.S. Patents Australia Patents
6111549 6876920 7400956 8000381 8214111 2002244539
6397147 7142956 7429952 8018376 8217833 2002325645
6469663 7162348 7437230 8085196 8265826 2004320401
6501346 7277792 7460942 8102325 8271194
6539303 7292185 7689354 8138970 8307535
6549091 7292186 7808428 8140223 8311696
6711501 7373231 7835832 8174437 8334804
6744404 7388539 7885745 8184050 RE41358
6865465 7400294 7948769 8190337

Documentation Feedback
Hemisphere GNSS is committed to the quality and continuous improvement of our products and services. We urge
you to provide Hemisphere GNSS with any feedback regarding this guide by writing to the following email
address: [e-mail].

V104n GPS Compass User Guide
1
Contents
Chapter 1 Introduction
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2 V104n Installation
Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GPS Reception. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
V104n Environmental Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
VHF Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
V104n Alignment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
V104n Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cable Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Flush Mount. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pole Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Powering and Connecting to the V104n. . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
NMEA 2000 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 3 Operation
GPS Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
GPS Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2
Contents
Differential Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
V104n Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Supplemental Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Time Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Common Commands and Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
End User License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Warranty Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

V104n GPS Compass User Guide
1
Chapter 1: Introduction
Overview
Parts List

2
Chapter 1: Introduction
Overview
The V104n™ GPS Compass is based upon Hemisphere GNSS’ exclusive
Crescent®and Crescent Vector™ II technology.
The V104n is a complete GPS compass and position system in a single
enclosure that requires a standard NMEA 2000 cable connection. With
NMEA 2000 support and ease of installation, the V104n is the perfect
solution for marine-based applications.
The V104n is an integrated system that houses the following:
• Crescent and Crescent Vector II technology
• Dual integrated GPS antennas
• Power supply
• Single axis gyro
• Tilt sensor on each axis (X and Y axes)
The gyro and tilt sensors are present to improve system performance and to
provide backup heading information in the event that a GPS heading is not
available due to signal blockage.
Crescent Vector II technology supports multiple RF front ends - enabling
tighter coupling of measurements from separate antennas for use in
heading-based products. Users will achieve excellent accuracy and stability
due to Crescent’s more accurate code phase measurements, improved multi-
path mitigation, and fewer components.
The V104n’s GPS antennas are separated by 13.5 cm between their phase
centers, resulting in better than 2° rms heading performance. The V104n
provides heading and position updates of up to 10 Hz and delivers position
accuracy of better than 1.0 m 95% of the time when using differential GPS
corrections from Space Based Augmentation Systems (SBAS).
The V104n also features Hemisphere GNSS’ exclusive COAST™ technology
that enables Hemisphere GNSS receivers to utilize old differential GPS
correction data for 40 minutes or more without significantly affecting the
position quality. The V104n is less likely to be affected by differential signal
outages due to signal blockages, weak signals, or interference when using
COAST.

V104n GPS Compass User Guide
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If you are new to GPS and SBAS, refer to the GPS Technical Reference for
further information on these services and technologies before proceeding.
The GPS Technical Reference is available from the Hemisphere GNSS
website at www.hemispheregnss.com.
Parts List
Note: The V104n’s parts comply with IEC 60945 Section 4.4: “exposed to the
weather.”
This User Guide is available for download from the Hemisphere GNSS
website at www.hemispheregnss.com.
Table 1-1: Parts list for V104n
Part Name Qty Part Number
V104n GPS Compass (NMEA 2000) 1 804-0128-0
Screw Housing Caps 2 675-0173-0
Mounting Screws 2 675-1199-000#
Mounting Base 1 676-0035-0
Mounting Nut 1 676-1021-000#
Screw Housing Cap O-Rings 2 681-1066-0

4
Chapter 1: Introduction

V104n GPS Compass User Guide
5
Chapter 2: V104n Installation
Mounting Location
Mounting Orientation
Mounting Options
Powering and Connecting to the V104n
Connecting the V104 to External Devices