Trimble 48480-SNB900 Trimble® SNB900 Radio Modem User Manual Trimble SNB900 Radio Modem User Guide

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Document ID	478924
Application ID	+5I+Ys8ApEVhShieobwisA==
Document Description	Manual revised
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	54.71kB (683817 bits)
Date Submitted	2004-10-14 00:00:00
Date Available	2004-10-14 00:00:00
Creation Date	2004-08-19 08:55:19
Producing Software	Acrobat Distiller 6.0 (Windows)
Document Lastmod	2004-08-19 15:30:32
Document Title	Trimble® SNB900 Radio Modem User Guide
Document Creator	FrameMaker 7.0
Document Author:	Trimble Navigation Limited - Technical Publications Group

Trimble® SNB900
Radio Modem
User Guide
Version 1.0
Revision A
July 2004
Contact Information
Trimble Geomatics and Engineering Division
5475 Kellenburger Road
Dayton, Ohio 45424-1099
USA
800-538-7800 (toll free in USA)
+1-937-233-8921 Phone
+1-937-233-9004 Fax
www.trimble.com
Copyright and Trademarks
© 2004, Trimble Navigation Limited. All rights
reserved.
Trimble and the Globe & Triangle logo are trademarks
of Trimble Navigation Limited, registered in the United
States Patent and Trademark Office and other countries.
CMR, CMR+, SiteNet, and MS750 are trademarks of
Trimble Navigation Limited.
Microsoft, Windows, and Windows NT are either
registered trademarks or trademarks of Microsoft
Corporation in the United States and/or other countries.
All other trademarks are the property of their respective
owners.
Release Notice
This is the July 2004 release (Revision A) of the
SNB900 User Guide. It applies to version 1.0 of the
Trimble SNB900 radio modem.
The following limited warranties give you specific legal
rights. You may have others, which vary from
state/jurisdiction to state/jurisdiction.
Hardware Limited Warranty
Trimble Navigation Limited warrants that this hardware
product (the “Product”) will perform substantially in
accordance with published specifications and be
substantially free of defects in material and
workmanship for a period of one (1) year starting from
the date of delivery. The warranty set forth in this
paragraph shall not apply to software products.
Software License, Limited Warranty
This Trimble software product, whether provided as a
stand-alone computer software product, built into
hardware circuitry as firmware, embedded in flash
memory, or stored on magnetic or other media, (the
“Software”) is licensed and not sold, and its use is
governed by the terms of the relevant End User License
Agreement (“EULA”) included with the Software. In the
absence of a separate EULA included with the Software
providing different limited warranty terms, exclusions
and limitations, the following terms and conditions shall
apply. Trimble warrants that this Trimble Software
product will substantially conform to Trimble’s
applicable published specifications for the Software for
a period of one (1) year, starting from the date of
delivery.
Warranty Remedies
Trimble's sole liability and your exclusive remedy under
the warranties set forth above shall be, at Trimble’s
option, to repair or replace any Product or Software that
fails to conform to such warranty ("Nonconforming
Product") or refund the purchase price paid by you for
any such Nonconforming Product, upon your return of
any Nonconforming Product to Trimble in accordance
with Trimble’s standard return material authorization
procedures.
Warranty Exclusions and Disclaimer
These warranties shall be applied only in the event and
to the extent that (i) the Products and Software are
properly and correctly installed, configured, interfaced,
maintained, stored, and operated in accordance with
Trimble's relevant operator's manual and specifications,
and; (ii) the Products and Software are not modified or
misused. The preceding warranties shall not apply to,
and Trimble shall not be responsible for defects or
performance problems resulting from (i) the
combination or utilization of the Product or Software
with hardware or software products, information, data,
systems, interfaces or devices not made, supplied or
specified by Trimble; (ii) the operation of the Product or
Software under any specification other than, or in
addition to, Trimble's standard specifications for its
products; (iii) the unauthorized, installation,
modification, or use of the Product or Software; (iv)
damage caused by accident, lightning or other electrical
discharge, fresh or salt water immersion or spray; or (v)
normal wear and tear on consumable parts (e.g.,
batteries). Trimble does not warrant or guarantee the
results obtained through the use of the Product.
THE WARRANTIES ABOVE STATE TRIMBLE'S ENTIRE
LIABILITY, AND YOUR EXCLUSIVE REMEDIES,
RELATING TO PERFORMANCE OF THE PRODUCTS
AND SOFTWARE. EXCEPT AS OTHERWISE
EXPRESSLY PROVIDED HEREIN, THE PRODUCTS,
SOFTWARE, AND ACCOMPANYING
DOCUMENTATION AND MATERIALS ARE PROVIDED
“AS-IS” AND WITHOUT EXPRESS OR IMPLIED
WARRANTY OF ANY KIND BY EITHER TRIMBLE
NAVIGATION LIMITED OR ANYONE WHO HAS BEEN
INVOLVED IN ITS CREATION, PRODUCTION,
INSTALLATION, OR DISTRIBUTION INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, TITLE, AND
NONINFRINGEMENT. THE STATED EXPRESS
WARRANTIES ARE IN LIEU OF ALL OBLIGATIONS OR
LIABILITIES ON THE PART OF TRIMBLE ARISING
OUT OF, OR IN CONNECTION WITH, ANY PRODUCTS
OR SOFTWARE. SOME STATES AND JURISDICTIONS
DO NOT ALLOW LIMITATIONS ON DURATION OR
THE EXCLUSION OF AN IMPLIED WARRANTY, SO
THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
TRIMBLE NAVIGATION LIMITED IS NOT
RESPONSIBLE FOR THE OPERATION OR FAILURE OF
OPERATION OF GPS SATELLITES OR THE
AVAILABILITY OF GPS SATELLITE SIGNALS.
Limitation of Liability
TRIMBLE’S ENTIRE LIABILITY UNDER ANY
PROVISION HEREIN SHALL BE LIMITED TO THE
AMOUNT PAID BY YOU FOR THE PRODUCT OR
SOFTWARE LICENSE. TO THE MAXIMUM EXTENT
PERMITTED BY APPLICABLE LAW, IN NO EVENT
SHALL TRIMBLE OR ITS SUPPLIERS BE LIABLE FOR
ANY INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES WHATSOEVER UNDER
ANY CIRCUMSTANCE OR LEGAL THEORY RELATING
IN ANY WAY TO THE PRODUCTS, SOFTWARE AND
ACCOMPANYING DOCUMENTATION AND
MATERIALS, (INCLUDING, WITHOUT LIMITATION,
DAMAGES FOR LOSS OF BUSINESS PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS
INFORMATION, OR ANY OTHER PECUNIARY LOSS),
REGARDLESS WHETHER TRIMBLE HAS BEEN
ADVISED OF THE POSSIBILITY OF ANY SUCH LOSS
AND REGARDLESS OF THE COURSE OF DEALING
WHICH DEVELOPS OR HAS DEVELOPED BETWEEN
YOU AND TRIMBLE. BECAUSE SOME STATES AND
JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR
LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, THE ABOVE LIMITATION
MAY NOT APPLY TO YOU.
NOTE: THE ABOVE LIMITED WARRANTY
PROVISIONS MAY NOT APPLY TO PRODUCTS OR
SOFTWARE PURCHASED IN THE EUROPEAN UNION.
PLEASE CONTACT YOUR TRIMBLE DEALER FOR
APPLICABLE WARRANTY INFORMATION.
Notices
Class B Statement – Notice to Users. This equipment
has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC
rules, and Part 90 of the FCC rules. These limits are
designed to provide reasonable protection against
harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communication. However, there is
no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and
the receiver.
– Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV
technician for help.
Changes and modifications not expressly approved by
the manufacturer or registrant of this equipment can
void your authority to operate this equipment under
Federal Communications
Prior to operating these radio modems, users are
legally required to obtain frequency licenses, as
required by the country-of-use. Please contact your
local communications governing agency for the
licensing requirements for each of these radio
modems.
Safety
You must maintain a minimum separation distance of
21 cm (approximately 8 in) between yourself and the
radiating antenna for this device to satisfy the
RF Exposure requirements of the FCC and Industry
Canada. The antenna may not be co-located with any
other transmitting device. For mobile operation, the
maximum gain of the antenna must not exceed 5 dBi.
Declaration of Conformity (Canada)
Company name
Trimble Navigation Limited
Company number
1756
Company address
Trimble Geomatics and Engineering Division
5475 Kellenburger Road
Dayton, Ohio 45424-1099
USA
800-538-7800 (toll free in USA)
+1-937-233-8921 Phone
+1-937-233-9004 Fax
Model number
SNB900
Approval date
Specification code
17561031902A3 17
Specification
RSS210
Issue
Band
650KG1D
Power
740m
From frequency
902M
To frequency
928M
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Welcome . . . . . .
Related Information .
Technical Assistance
Your Comments . . .
.2
.2
.3
.3
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Introduction . . . . . . . . .
Features . . . . . . . . . . .
Use and Care . . . . . . . .
Equipment Sets . . . . . . .
Optional Accessories . . . .
SNB900 Description . . . .
Power and I/O cables.
Default settings. . . .
.6
.6
.7
.7
.8
.8
10
10
Configuration and Installation . . . . . . . . . . . . . . . 11
Introduction . . . . . . . . . . . . . . . .
Configuration . . . . . . . . . . . . . . .
Configuring the serial I/O port . . .
Connecting to an office computer .
Getting started with WinFlash . . .
Firmware updates . . . . . . . . .
Installation . . . . . . . . . . . . . . . .
Installing an SNB900 as a base . .
Installing an SNB900 as a repeater
12
12
12
13
13
16
16
17
18
SNB900 Radio Modem User Guide
Contents
Installing antennas . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Characteristics and Specifications . . . . . . . . . . . . . 21
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Antenna Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Omni-directional antennas . . . . . . . . . . . . . . . . . . . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 25
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
vi
SNB900 Radio Modem User Guide
CHAPTER
Introduction
In this chapter:
Welcome
Related Information
Technical Assistance
Your Comments
SNB900 Radio Modem User Guide
1
1.1
Introduction
Welcome
This manual describes how to set up and use a Trimble® SNB 900
radio modem.
Even if you have used other Global Positioning System (GPS)
products before, Trimble recommends that you spend some time
reading this manual to learn about the special features of this product.
If you are not familiar with GPS, visit the Trimble website
(www.trimble.com) for an interactive look at Trimble and GPS.
This manual assumes that you know how to use your current
Microsoft® Windows® operating system.
1.2
Related Information
Sources of related information include the following:
•
Release notes
Release notes describe new features of the product, information
not included in the manuals, and any changes to the manuals.
They are provided as a .pdf file on the CD and installed in the
program directory (typically C:\Program
Files\Trimble\) when you install the software.
•
Update notes
There is a warranty activation sheet with this product. Send it in
to automatically receive update notes containing important
information about software and hardware changes. Contact your
local Trimble dealer for more information about the support
agreement contracts for software and firmware, and an extended
warranty program for hardware.
•
Trimble training courses
Consider a training course to help you use this GPS system to
its fullest potential. For more information, go to the Trimble
website at www.trimble.com/training.html.
SNB900 Radio Modem User Guide
Introduction
1.3
Technical Assistance
If you have a problem and cannot find the information you need in the
product documentation, contact your local dealer. Alternatively, do
one of the following:
1.4
•
Request technical support using the Trimble website at
www.trimble.com/support.html
•
Send an e-mail to trimble_support@trimble.com
Your Comments
Your feedback about the supporting documentation helps us to
improve it with each revision. Send an e-mail with your comments to
ReaderFeedback@trimble.com.
SNB900 Radio Modem User Guide
1
Introduction
SNB900 Radio Modem User Guide
CHAPTER
Overview
In this chapter:
Introduction
Features
Use and Care
Equipment Sets
Optional Accessories
SNB900 Description
SNB900 Radio Modem User Guide
2
2.1
Overview
Introduction
The rugged Trimble® SNB900 radio modem is ideal for harsh
environments, such as those associated with construction, seismic, and
mining surveys. It is convenient and versatile: When used with a
Trimble rover GPS receiver that has an internal radio modem, the
SNB900 can be used to establish a robust wireless data broadcast
network for real-time differential and real-time kinematic GPS
applications.
2.2
Features
The SNB900 has the following standard features:
•
900 MHz ISM
•
+30 dBm
•
902–928 MHz frequency hopping on 50 channels (USA)
•
High-speed wireless data rate
•
Interfaces with Trimble survey-grade GPS receivers
•
Supports up to two repeaters in a single network, three if an
access point is used
•
Rugged, weatherproof construction
•
Two-line, 16-character VFD display
•
Compatible with Trimble CMR+™ and RTCM SC-104
•
Operational parameters configured using the WinFlash utility, a
handheld controller, or the front panel
•
Can be configured as a base, repeater, or rover
•
Compatible with SNR900 and SiteNet™ 900 external radios,
and Trimble 5700 and 5800 internal radios
•
When connected to a Trimble Network Router (TNR) provides
two-way IP connectivity to machine grade control systems.
SNB900 Radio Modem User Guide
Overview
Note – In this manual, CMR™ and CMR+ formats are both
represented by CMR+.
2.3
Use and Care
The SNB900 is configured as a base or rover, and can be connected to
most Trimble survey-grade GPS receivers through a single serial I/O
cable and power cable. When used as a repeater, the SNB900 operates
autonomously and requires only a power and antenna connection, with
no connection to the serial port.
To achieve line-of-sight (LOS) coverage to all points in a survey area,
an SNB900 radio modem network can include up to two repeaters,
depending on data format and output data rate. The rovers use the data
packet from the base or repeater, whichever the rover receives first.
The radio modem is designed to withstand rough treatment typical of
equipment used in the field. However, it is a precision electronic
instrument and should be treated with reasonable care. It operates at
temperatures from –40 °C to +65 °C (–40 °F to 149 °F). The casing is
sealed and weatherproof.
2.4
Caution – Operating or storing the SNB900 outside the specified
temperature range can damage the instrument.
Equipment Sets
The SNB900 is supplied as a stand-alone product, but additional parts
are available. For example, additional parts enable you to connect the
SNB900 to a Trimble MS750™, 5700, 5800, R7, or R8 GPS receiver.
SNB900 Radio Modem User Guide
2
2.5
Overview
Optional Accessories
The following accessories can be purchased in addition to the standard
system:
2.6
•
18 Ah battery with carry pouch (P/N 44103-18)
•
Battery charger, 18 Ah (P/N 44111-00)
•
6 Ah battery with carry pouch and charger (P/N 34106-00)
•
10 Ah battery with carry pouch and charger (P/N 34107-00)
SNB900 Description
The SNB900 is packaged in a weatherproof housing. The front panel
has a VFD display for network frequency, radio status, and error
messages. See Figure 2.1.
Figure 2.1
SNB900 front panel
The following main menus are available through the front panel:
•
NETWORK – Network number
•
MODE – Base, Repeater, or Rover modes
•
DATA PORT CONFIG – Data port baud rate settings
•
DEVICE STATUS – Radio programming information
SNB900 Radio Modem User Guide
Overview
When you start the radio modem, the Network menu opens
automatically. Use the front panel control keys to select these
additional menus:
•
NEXT – Browse though the menu screens
•
UP / DOWN – Scroll through items within the menus
Table 2.1 describes the main menu items and the selections they
provide. Certain items displayed on the front panel will differ
according to your units settings.
Table 2.1
Main
menu
SNB900 menu hierarchy
Menu selection
Network
Mode
(up to 4
networks)
Base
w/No Rpt
Data Port 38400
Config
8–none–1
Base
w/One Rpt
Base
w/Two Rpt
Repeater 1
Repeater 2 Rover
38400
8–odd–1
9600
8–none–1
9600
8–odd–1
57600
8–none–1
Figure 2.2 shows the three electrical connectors on the rear panel:
•
ANTENNA connector (reverse polarity female TNC)
•
Power/Data connector (26-pin D Sub connector)
•
Power/Data connector (seven-pin LEMO, 0-shell)
Figure 2.2
SNB900 rear panel
SNB900 Radio Modem User Guide
2
26.1
Overview
Power and I/O cables
The SNB900 base equipment set comes with:
•
Radio-to-receiver I/O cable
•
Antenna cable with antenna mount
•
Power supply
•
Configuration cable, office computer to radio modem (this
enables you to use WinFlash to modify the SNB900
configuration)
When configured as a base, the radio modem receives data at the
DATA connector through the Lemo-to-Lemo cable that plugs into a
Trimble GPS receiver, or using the 26-pin cable. When the unit is
configured as a repeater, data connection is not required.
Power is connected to the unit at the POWER connector from a
suitable power source, either a stable DC power supply or a battery.
26.2
Default settings
The SNB900 radio modem is shipped from the factory with the
following default settings:
10
•
NETWORK – Network 1
•
MODE – Base with No Repeater
•
DATA PORT CONFIG – 38400 8–None–1
SNB900 Radio Modem User Guide
CHAPTER
Configuration and Installation
In this chapter:
Introduction
Configuration
Installation
SNB900 Radio Modem User Guide
11
3
3.1
Configuration and Installation
Introduction
The SNB900 contains both a data modem and a radio. It can be used in
a variety of configurations to form a complete wireless data network.
For example, you can configure the SNB900 to operate as:
3.2
•
a base radio modem, broadcasting directly to a Trimble MS750,
5700, 5800, R7, or R8 rover GPS receiver that contains an
internal radio modem
•
a repeater
•
an access point
Configuration
For a list of the settings that an SNB900 arrives with, see Default
settings, page 10. The default settings are stored in nonvolatile
memory and serve as the initial settings each time you start the radio
modem. Use WinFlash to reconfigure the settings as often as
necessary. You can also use the front panel menus to change some of
them.
32.1
Configuring the serial I/O port
To use WinFlash, connect the radio modem to a computer that is
running a Microsoft Windows 95, 98, Me, Windows NT® 4.0 or later,
Windows 2000, or Windows XP operating system.
Connect the SNB900 to the computer, install WinFlash, and configure
the serial I/O settings as described in the following sections.
Alternatively, configure the serial port communication settings from
the front panel, using the Data Port Config menu.
Note – The office computer must support a 38400 bps serial port data
rate.
12
SNB900 Radio Modem User Guide
Configuration and Installation
32.2
30.1
Connecting to an office computer
1.
Connect the SNB900 adaptor from the I/O port to a serial COM
port on the computer.
2.
Connect the power cable from the POWER connector to a
suitable power source.
Getting started with WinFlash
To configure the SNB900, run the WinFlash communications setup
utility on an office computer. A Microsoft Windows 95, 98, Me,
Windows NT 4.0 or later, Windows 2000, or Windows XP operating
system is required.
Installing WinFlash
Please refer to the release notes on the SNB900 CD.
Using WinFlash
1.
Click the WinFlash icon on the office computer desktop. The
Device Configuration dialog appears:
SNB900 Radio Modem User Guide
13
3
Configuration and Installation
2.
3.
14
To connect to the radio modem, follow the instructions shown in
the dialog:
a.
Select the appropriate PC serial port (COM port).
b.
Select SNB900 and click Next. The Operation Selection
dialog appears:
Select an operation to perform and click Next. The Settings
Review dialog appears.
SNB900 Radio Modem User Guide
Configuration and Installation
4.
Confirm your selected operation and click Finish. A connection
status window appears, and counts to 100%, and then displays
the SNB900 Configuration dialog:
Use the SNB900 Configuration dialog to modify configuration
settings:
1.
In the Mode field, select the appropriate operating mode
depending on intended use. For example, Base with No
Repeaters.
2.
In the Data Port group select the Baud Rate and Parity. This is
the setting for communications between the receiver and radio.
Note – The default GPS Port settings for the SNB900 is 38400
baud rate with None parity. The default Mode setting is Base
with No Repeaters.
3.
In the Wireless Settings group, select the current network.
Note – All radios in the network must be configured with the
same network, or the radios will not communicate.
SNB900 Radio Modem User Guide
15
3
Configuration and Installation
4.
To update the configuration, click Set. When the status dialog
confirms that the configuration is complete, return to the main
menu or exit WinFlash.
Click the RadioInfo button to view a text list of all radio information,
including the current configuration settings.
30.1
Tip – You can print or save to file the radio configuration information for
future reference, or to send to Trimble Support to aid in troubleshooting
radio problems.
Firmware updates
SNB900 firmware upgrades are periodically available from the
Trimble website (www.trimble.com). The radio firmware can also be
upgraded using WinFlash.
3.1
Installation
Before setting up the equipment in the field, verify that each radio
modem is set to the same network.
Note – High-power signals from a nearby radio station or radar
transmitter can overwhelm the radio modem circuits. This does not
harm the instrument, but can prevent it from functioning correctly. To
avoid problems, try not to use the radio modem within 400 meters
(1300 feet) of powerful radar, television, or other transmitters.
Low-power transmitters, such as those in portable phones and
walkie-talkies, do not normally interfere with SNB900 operation.
16
SNB900 Radio Modem User Guide
Configuration and Installation
An SNB900 can be installed in a network as a base station, access
point, or repeater.
31.1
Installing an SNB900 as a base
1.
If necessary, reconfigure the serial port settings on the unit to
those of the GPS receiver.
Configure the unit as a base with no repeaters, or with one or
two repeaters. Ensure that all units in your network are
configured according to their specific task within the network.
2.
3.
Before connecting the power cable:
a.
Attach the base antenna onto the mounting pole.
b.
Mount the entire antenna assembly on a tripod using the
tripod mounting plate and connect the antenna cable to the
SNB900 radio modem.
c.
Attach the antenna cable to the ANTENNA port on the
unit.
Connect the power cable from the SNB900 POWER port to an
appropriate 12 V DC power source.
Caution – Make sure that the polarity is correct when you connect the
power cable. The base radio modem will not turn on if you reverse the
polarity.
4.
If the GPS receiver is outputting data, the base should now be in
operation. Check the display on the SNB900 to make sure that
the TRAN (transmitting) message is flashing.
5.
Make sure that you are on the correct channel and power output.
SNB900 Radio Modem User Guide
17
3
30.1
Configuration and Installation
Installing an SNB900 as a repeater
To achieve coverage to all points in a survey area, an SNB900 network
can include up to two repeaters. The repeaters retransmit data packets
in a way that avoids mutual interference with the base and each other.
The operation of the repeaters is transparent to the rovers. The rover
will use the data packets from the base or repeater, whichever it
receives first.
To install a SNB900 as a repeater:
1.
If using only one repeater, make sure that the SNB900 is
configured for Repeater 1. If using a second repeater, make sure
that it is configured for Repeater 2.
2.
Before connecting the power cable:
3.
18
a.
Assemble the repeater antenna, attach it to its mount, and
then connect the complete assembly to the antenna
mounting pole.
b.
Use the tripod mounting plate to mount the antenna
assembly and pole on a tripod, and then connect the
antenna cable to the SNB900 at the Radio Antenna port.
Connect the power cable from the SNB900 POWER port to an
appropriate 12 V DC power source. The Network menu that
appears on the front panel shows which network is in use.
Caution – Connect the power cable with the correct polarity. Reversing
polarity does not damage the base radio modem, but will blow the
protective 10 Amp fuse in the power cable.
4.
Select the repeater radio modem channel to match the base
radio modem channel. To do this, press the UP or DOWN key
until the appropriate channel setting is displayed.
5.
Verify that the channel assignments are the same for all base,
rover, and repeater units.
SNB900 Radio Modem User Guide
Configuration and Installation
The repeater should now be in operation. When the repeater
receives data broadcast from the base, RPT (Repeat) flashes in
the top right corner of the SNB900 display.
30.1
Installing antennas
Safety
You must maintain a minimum separation distance of 20 cm
(approximately 8 in) between yourself and the radiating antenna for
this device to satisfy the RF Exposure requirements of the FCC. For
mobile operation, the maximum gain of the antenna must not exceed 0
dBi.
Height
When installing and locating antennas, place them as high as legally
possible above the ground and surrounding obstructions, such as trees,
vehicles, buildings, and hills.
Note – Antenna height is the most important factor in achieving
maximum range with radio modems. Doubling the antenna height
results in a 40% increase in line-of-sight range. Use low loss cable if
you have to increase the length of the antenna cable to accommodate
your installation. Consult your license for the legal limits on antenna
height.
Line-of-sight obstructions
If you place an antenna near an object, especially a metal object, you
can severely limit its efficiency. When an antenna is mounted on an
antenna mast, try to make sure that the radiating element of the
antenna is above any possible obstruction.
SNB900 Radio Modem User Guide
19
3
20
Configuration and Installation
SNB900 Radio Modem User Guide
CHAPTER
Characteristics and
Specifications
In this chapter:
Introduction
Antenna Gain
SNB900 Radio Modem User Guide
21
4
4.1
Characteristics and Specifications
Introduction
This chapter summarizes the general characteristics and specifications
of the SNB900.
4.2
Antenna Gain
The antennas supplied with an SNB900 do not increase the energy
radiated by the radio modem. They concentrate the energy from the
radio modem in a particular direction. The degree to which they
concentrate radio frequency energy in any particular direction is called
directivity and is measured in decibels (dB). The greater the antenna
gain in dB, the higher the directivity and the more the radiated energy
from the antenna is concentrated in some direction.
42.1
Omni-directional antennas
An antenna that radiates energy equally in all directions (that is, at
every azimuth) in the horizontal plane is called omni-directional. An
omni-directional antenna is not omni-directional in the vertical plane,
and must be oriented vertically.
22
SNB900 Radio Modem User Guide
Characteristics and Specifications
Figure 4.1 shows the radiated energy patterns of the omni-directional
antennas.
Figure 4.1
Omni-directional antenna gain patterns
The top view shows radiated energy patterns in the horizontal, or
azimuth plane of the antennas, the plane that perpendicularly bisects
the length of the antenna. For omni-directional antennas, all azimuths
receive equal energy, but the 5 dB antenna radiates almost four times
more power in the horizontal plane than the 0 dB antenna. In an open
field, four times more power approximately doubles the range.
Much of the energy from the 5 dB antenna is concentrated in elevation
to within ±12° of horizontal. A rover antenna within this sector
receives stronger signals from a 5 dB antenna. However, at angles
greater than 12° from horizontal, the 0 dB gain antenna radiates more
energy.
Antenna gain has exactly the same effect on signal reception as it does
on signal transmission. A high gain rover antenna can increase range
performance as long as it is oriented correctly with respect to the
transmitting antenna. For high gain antennas, this means keeping the
antenna element vertical and at the same elevation as the transmitting
antenna. Otherwise, it may be better to use an antenna with less gain.
SNB900 Radio Modem User Guide
23
4
24
Characteristics and Specifications
SNB900 Radio Modem User Guide
CHAPTER
Troubleshooting
In this chapter:
Introduction
Servicing
Status Messages
SNB900 Radio Modem User Guide
25
5
5.1
Troubleshooting
Introduction
This chapter lists status messages and describes how you can use these
to isolate and correct system configuration or operational issues.
5.2
Servicing
There are no user-serviceable parts in an SNB900 radio modem.
Contact your Trimble representative or local service provider for
assistance.
5.3
Status Messages
A status message can appear as a one or two line message on the front
panel.
Message
Description
Action
Battery Low
The battery voltage is
below 11.6 volts.
Replace the battery as soon as possible.
Battery Low,
Radio
Turned Off
The battery voltage
Replace the battery. The SNB900 resets and starts
has dropped below
to transmit again.
10.8 volts and the radio
has stopped
transmitting.
Note – Battery low voltage levels are approximate and may vary
according to factors such as battery condition, radio modem
operating mode, and environmental factors.
Comm Port
Error, Check
Data Rate
26
The communications
settings between the
GPS receiver and the
radio modem are
incompatible.
SNB900 Radio Modem User Guide
Use the controller or the front panel to reconfigure
the GPS receiver and radio modem to the same
settings.
Troubleshooting
Warning:
Radio Hot
The radio is nearing its Reduce the data rate.
maximum operating
Shade the radio modem from direct sunlight.
temperature.
Warning:
Radio Hot
Output Off
Caution – The housing of the SNB900 is hot to touch if
the Radio Hot message is displayed. Use caution and
reasonable care when handling an SNB900 that is in
this state.
The unit has exceeded Allow the SNB900 to cool down. Reduce the power
its maximum internal
output and the data rate.
operating temperature Shade the SNB900 from direct sunlight.
of +85 °C (+185 °F)
and has stopped
transmitting.
Connect
Antenna to
Radio
Warning – Operating or storing an SNB900 outside the
specified temperature range can damage the instrument.
The radio modem is
attempting to transmit
but does not sense an
antenna connected to
the antenna port.
Connect the radio antenna to the SNB900. If these
are already connected, the cable and/or antenna
may have failed.
Note – This message never appears if the SNB900 is configured as a
rover.
ERROR: Bad
The radio was
Radio Config configured incorrectly.
This can occur when
the radio firmware is
upgraded.
Reconfigure the radio modem using WinFlash or
the controller.
HARDWARE
ERROR:
XX (code
number)
Return the SNB900 for servicing.
This is a fatal error.
Write down the error code and contact your Trimble
representative or local service provider for
assistance.
SNB900 Radio Modem User Guide
27
5
28
Troubleshooting
SNB900 Radio Modem User Guide
Index
Numerics
5700 GPS receiver see Trimble 5700 GPS
receiver
5800 GPS receiver see Trimble 5800 GPS
receiver
accessories 8
antenna
5 dB, 0 dB 23
directional 23
gain 22
installing 19
obstructions 19
omni-directional 22
orienting 22
radiated energy 22
safety 19
antenna connector 9
base
installing SNB900 as 17
SNB900 configured as 7
battery charger, accessory 8
Battery Low message 26
Battery Low, Radio Turned Off message 26
baud rate 9
browsing menu screens 9
carry pouch, accessory 8
caution
polarity 17
Radio Hot message 27
temperature 7
changing default settings 12
characteristics 22
Class B Statement iii
CMR, CMR+ 6, 7
COM port 13
Comm Port Error, Check Data Rate
message 26
comments, sending to Trimble 3
compatibility 6
configuring serial I/O port 12
Connect Antenna to Radio message 27
connecting to an office computer 13
connectors 9
copyright ii
data connection, base configuration 10
data connector 9, 10
data modem in SNB900 12
DATA PORT CONFIG menu 8
data port configuration, default 10
SNB900 Radio Modem User Guide
29
Index
Declaration of Conformity iv
default
data port configuration 10
menu 9
mode 10
network 10
settings, changing 12
Device Configuration dialog 13
DEVICE STATUS menu 8
directional antenna 23
display 8
installing
antenna 19
prerequisites 16
SNB900 as a base 17
SNB900 as a repeater 18
SNB900 in a network 17
interference, reducing electronic 16
Limitation of Liability iii
line-of-sight (LOS) 7, 19
electrical connectors 9
electronic interference 16
energy radiated by antenna 22
error messages 8
ERROR, Bad Radio Config message 27
external radios 6
factory settings 10
factory settings, changing 12
features 6
feedback on documentation 3
firmware updates 16
font panel, messages 26
front panel display 8
machine grade control systems 6
menu display 8
menu hierarchy 9
menu, browsing 9
message
RPT (Repeat) 19
TRAN 17
messages
error 8
troubleshooting 26
Microsoft Windows 12
MODE menu 8
mode, default 10
MS750 GPS receiver 7, 12
GPS receivers 12
grade control systems 6
HARDWARE ERROR, XX (code number)
message 27
30
SNB900 Radio Modem User Guide
network frequency display 8
NETWORK menu 8
network, default 10
network, installing SNB900 in 17
network, same for all radio modems 16
NEXT menu 9
Index
Notice to Users iii
obstructions, line-of-sight 19
office computer, connecting to 12
omni-directional antenna 22
operating mode 15
operating system 12
Operation Selection dialog 14
orienting the antenna 22
overview 5
parity 9
polarity, power cable 17, 18
power and I/O cables 10
power cable polarity 17, 18
POWER connector 10
power connector 9
power source 17
power/data connector 9
R7 GPS receiver see Trimble R7 GPS
receiver
R8 GPS receiver see Trimble R8 GPS
receiver
radar interference 16
radio in SNB900 12
radio information 16
radio interference 16
radio modem networ 7
radio modem network 16
radio status display 8
rear panel 9
release notes 2
repeater
installing SNB900 as 17, 18
maximum number 7
SNB900 used as 7
router 6
rover, SNB900 configured as 7
RPT (Repeat) message flashing 19
RTCM SC-104 6
Safety iii
safety, antenna 19
scrolling 9
serial I/O port, configuring 12
setting up the equipment 16
settings
changing default 12
default 10
Settings Review dialog 14
setup utility, communications 13
setup, interference 16
SiteNet external radio 6
SNB900 Configuration dialog 15
SNR900 radio, compatible with 6
specifications 22
standard features 6
status messages 26
support 3
survey-grade GPS receivers 6
connecting to 7
technical support 3
temperature, operating 7
trademarks ii
TRAN message flashing 17
Trimble 5700 GPS receiver 7, 12
internal radio 6
Trimble 5800 GPS receiver 7, 12
SNB900 Radio Modem User Guide
31
Index
internal radio 6
Trimble Network Router (TNR) 6
Trimble R7 GPS receiver 7, 12
Trimble R8 GPS receiver 7, 12
Trimble website 2
troubleshooting 26
UP/DOWN menu 9
update notes 2
updating firmware 16
use and care 7
VFD display 8
warning
radio hot 27
temperature 27
Warning, Radio Hot message 27
Warning, Radio Hot Output Off message 27
warranty ii
website, Trimble 2
WinFlash
configuration cable 10
operating system requirements 12
starting 13
wireless settings 15
32
SNB900 Radio Modem User Guide

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Description                     : Trimble® SNB900 Radio Modem User Guide
Author                          : Trimble Navigation Limited - Technical Publications Group
Subject                         : Trimble® SNB900 Radio Modem User Guide

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