SURVEY PRO
GPS Quick Start
Guide
ii
Table of Contents
Before You Leave the Office.................................................................1
Survey Method: RTK or Post Processing............................................2
Receiver Setup..................................................................................2
Receiver Settings ...........................................................................3
RTK Data Collection and Stake Out ....................................................4
Start GPS Survey.............................................................................5
Start GPS Survey - Choose One Point Setup.................................5
Start GPS Survey - Choose Projection Mode.................................6
Start GPS Survey - Choose Base Setup .........................................7
Start GPS Survey - Connect to Receiver........................................7
Base Setup......................................................................................8
Start GPS Survey - Rover Setup....................................................8
Start GPS Survey – Solve Localization .........................................9
Mapping Plane Zones and Ground Scale.....................................11
Data Collection...............................................................................11
Data Collection Settings...............................................................11
Data Collection Functions............................................................13
Stake Out........................................................................................13
Post Processing Data Collection.........................................................15
Post Processing Receiver and Settings.........................................15
Start Receiver Recording..............................................................15
Post Processing Data Collection....................................................16
File Processing................................................................................17
900-0034-XXQ 062006
Survey Pro GPS Quick Start Guide 1
Before You Leave the Office
• Make sure your software is registered. Go to Register
Modules on the Files menu. Check to see that at least the
Standard and GPS modules are registered.
• If you are using a geoid model, make sure the correct
*.GGF data file is on the data collector.
• If you are using a grid datum transformation, make sure
the correct pair of *.DGF files are on the data collector.
Note: Geodetic data files must be in the proper geodata
folder. For Windows Mobile 5 devices, this will be ‘My
Device\Geodata’. For Pocket PC 2003 devices, this will be
‘Built-in Storage\Geodata’. For Windows CE. net devices, this
will be ‘Disk\Geodata’.
• Make sure your equipment all works together. Some
equipment settings can not be configured using Survey
Pro. You should set up your base and rover and do a
short test session to ensure:
¾ The base and rover modems are programmed with the
correct channels and protocols. Although you can
change some modem parameters with Survey Pro, you
need to make sure they are correctly configured with
the manufacturer’s software application.
¾ The GPS receivers’ internal data storage has been
backed up and emptied. Although you can download
and delete receiver files from some brands of receiver,
this function is not available on all receiver brands
and models supported in Survey Pro..
¾ The base and rover receivers support compatible RTK
correction formats. This is especially important when
using older and newer base and rover pairs, or mixing
equipment from different manufacturers.
¾ All additional equipment, such as batteries, cables,
GPS antennas, external data modems and antennas,
range poles, tribrach adapters, etc… are in working
order.
2
Survey Method: RTK or Post Processing
This section describes:
¾ The two different types of GPS data collection supp orted
in Survey Pro.
¾ How to make a GPS receiver profile for an RTK base,
RTK rover, Ntrip rover, and post processing receiver.
Using GPS for precise surveying requires data from two
receivers collected at the same time. Survey Pro supports two
different methods of GPS data collection: Real Time
Kinematic (RTK) data collection and post processing data
collection. The RTK method uses a modem to send data from
a base receiver to a rover receiver, and the measurements are
combined at the rover receiver to calculate positions in real
time. The post processing method involves logging the raw
GPS measurements to a file on a disk, and then combining
the measurements using PC software to calculate positi ons
some time after the data is collected in the field.
The active receiver profile will set the method of data
collection in Survey Pro. Creating a receiver profile for an
RTK base, RTK rover, Ntrip rover, and post processing only
receiver is described below. RTK and post processing data
collection are described in the following section.
Receiver Setup
Before you can start surveying, you need to create a receiver
profile. A receiver profile describes the mode and settings
used when that receiver is the active instrument. The
Receiver Setup
profiles.
The easiest way to create a receiver profile is t o start a
survey, then tap Create New Receiver when prompted to
connect to an instrument. You can also access this button
from the Job
Choose a name for this profile, and select the brand and
model. Next, set the communication parameters for this
receiver. Usually you can just tap Defaults and then connect
to your equipment. However, if your equipment has been
configured before with different communication parameters,
screen is used to create or edit receiver
| Settings | Receiver screen.
Survey Pro GPS Quick Start Guide 3
you can use Autodetect to determine what the current
settings are in the receiver. To change the receiver
communication settings, select the new parameters and tap
Set Rx Comms.
Bluetooth Note: You can use Bluetooth to connect to a
Bluetooth enabled receiver. In some cases, you can also use
Bluetooth to connect to a cellular phone to use as a data
modem. How to use Bluetooth to connect to the recei ver
and/or the phone will depend on the data collector platform
you are using. Consult the users and reference manual for
more detailed information on Bluetooth setup and operat io n
within Survey Pro.
Once you are sure you are talking with the receiver, tap
Receiver settings… to open the Receiver Settings screen.
Receiver Settings
Use the three cards of the Receiver Settings
screen to set the
following parameters:
Receiver Mode and Correction Formats
Survey Pro can control a GPS receiver in one of four modes:
¾ RTK Base
¾ RTK Rover
¾ Ntrip Rover
¾ Post Processing
If you are using an RTK base or RTK rover, you must specify
the RTK Correction Format to broadcast from the base to the
rover over the modem. Choices here will depend on your
receiver model. You must choose the same format for the
base and rover. If you are using an RTK rover, you can set
any special rover handling options. If you are using an Ntrip
rover, the correction format and special handling is chosen
when you connect to the server. If you are using a post
processing receiver, no correction format setting is required.
This card is also used to set the elevation cutoff for trackin g
satellites.
4
Data Modem
For RTK base, RTK rover, and Ntrip rover receivers, you
must choose a data modem type and configure the
communication settings between the receiver and the modem
hardware. The choices of data modem will be different for
base and rover, and will vary between brands. If your specific
modem hardware is not listed in the interface, you can choose
Generic Serial and set the baud rate and parity for the
receiver to send data to the modem device.
General Settings
This card is used to pick brand and model specific settings.
The settings on this page will depend on the receiver model.
For more information, see the Reference Manual.
Post Process Settings
The Job
recording interval for logging GPS data for post processing. If
you wish to setup logging of raw GPS data for post processing,
either simultaneously with RTK data collection or for post
processing only data collection, go to the Post Proc ess
card and select a Recording Interval.
| Settings | Post Process card is used to set the
settings
RTK Data Collection and Stake Out
This section describes:
¾ How to start RTK data collection using the Start GPS
Survey wizard.
¾ How to setup receiver logging for post processing data
collection simultaneous with RTK.
¾ How and when to collect control points to solve a
localization coordinate system adjustment.
¾ How to use the different data collection functions
¾ How to use the different stake out functio ns
¾ How to select a map projection zone and how to setup a
Ground Coordinate system.
Survey Pro GPS Quick Start Guide 5
Start GPS Survey
This function is your starting point for any RTK survey. The
Start GPS Survey
to pick a coordinate system, set up GPS equipment, solve any
required coordinate system adjustment, and begin collecting
data.
wizard will guide you through all the steps
Start GPS Survey
GPS mode. Also, if you attempt to start any data collection or
stake out function before you complete all th e required GPS
steps, the Start GPS Survey
through the setup.
The steps to complete GPS setup with the Start GPS Survey
wizard will depend on what has been done in a job already.
Each step is described below from the beginning of a new GPS
survey.
Start GPS Survey - Choose One Point Setup
One point setup is a special case of the Start GPS Survey
wizard. You can use one point setup any time you open a
brand new job, and you want to start a new survey with
ground level distances. Survey Pro will use Gro und – TDS
Localization mode to set a default coordinate system for
ground distances, and then automatically solve the
localization adjustment using your one job file point.
To start a job with one point setup, tap Start Survey with One
Point Setup>, and then follow the prompts to set your base
and rover GPS receivers. Upon completion of the rover setup
you are ready to collect data
is located on the Survey menu when in
wizard will open to guide you
If you do not wish to use one point setup, choose Start Survey
with Regular Setup> to choose a projection mode.
6
Start GPS Survey - Choose Projection Mode
If you are not starting a new job with one point setup, you
need to choose one of two projection mod es: Ground TDS
Localization, or Mapping Plane. Choose to Use Ground TDS
Localization> if your local coordinate sy stem is a gro und level
survey, with no projection and no datum to define the
relationship between geodetic and local positions. Choose to
Select a Mapping Plane Zone> if your local coordinate system
is defined by a conformal map projection and geodetic datum
which you can choose from the database. The two projection
modes are described below:
Ground TDS Localization Mode
In this mode, a default map projection is created with your
first base setup. This default map projection is scaled f or
ground distances at the base height. You then collect GPS
measurements on local control points and solve the
localization adjustment. The localization adjustment is a 2D
similarity transformation which translates, rotates and scales
the default map projection’s (y,x) into your local coordinates
(N,E).
Mapping Plane Mode
In this mode, you setup a conformal map projection with a
geodetic datum. This map projection and datum define the
relationship between the geodetic posi tions (LLh) from the
GPS receiver and local coordinates (N,E,Elev). You can select
a mapping plane zone and geodetic datum from the coordinate
system database, or you can key in your own custom
projection.
After selecting a mapping plane zone from the database, if
your RTK base is set on a known location, no additional steps
are necessary to solve the coordinate system. However, i f yo ur
base is set at a new point, and the survey was started from an
autonomous GPS position, you will need to solve a localizat i on
adjustment for the mapping plane. The mapping plane
localization adjustment is a 2D similarity transformation
which translates, rotates and scales the inaccurate map
projection coordinates calculated from your autonomous base
setup into the correct coordinate system.
Survey Pro GPS Quick Start Guide 7
Start GPS Survey - Choose Base Setup
You have three choices for base setup:
Use Current Base
This choice is only available when you have already set a base
in this Survey Pro job. Choose to Use Current Base> to skip
the Base Setup screen and proceed to the next required step
in the process (Rover Setup
, Solve Localization, or Data
Collection).
Set New Base
Use this choice when you need to connect to a base receiver,
set it to begin broadcasting RTK corrections over the modem,
and configure the base reference position in Survey Pro. After
base setup, the next step is always Rover Setup
.
Use Remote Base
Use this choice when an RTK base is already setup and
broadcasting corrections. This includes using a GPS network
server as your source for base corrections. This choice will
open the Rover Setup
page where you will set the rover
receiver, get the base coordinate from the ro ver data link, and
configure the base reference position in Survey Pro.
After rover setup, if the coordinate system is set and properly
adjusted, you will go directly to Data Collection
. If you need to
solve a localization adjustment, your next step will be to
collect control points and then solve the coordinate system
adjustment.
Start GPS Survey - Connect to Receiver
Before you proceed with the Start GPS Survey
wizard, you
will be prompted to select a receiver to activate with the
Connect to Receiver
screen, which will show a list of either:
RTK base profiles; RTK rover plus Ntrip rover profiles; or
post processing receiver profiles. If you have used your
equipment with this data collector before, then your profile is
remembered and you can proceed by tapping Connect>. You
can also tap Create New Receiver to make a new profile, or
Receiver Settings to modify properties of an existing profile.
8
Base Setup
Use the Base Setup
routine to set an RTK base receiver to
begin broadcasting GPS measurements over the modem data
link, and to configure the base reference pos iti on in Survey
Pro. At the Base Setup
screen, measure the base antenna
and choose a point for the base station. You can enter a new
point name to start the base from an autonomous position, or
you can enter a point with known coordinates and start the
base on a known location. Tap Next> to set the base.
Set Base at Known Position
If you select an existing point with geodetic coordinates, or if
you have a coordinate system solved and you pick an ex isti ng
point where we can compute geodetic coordinates, you can
start the base with a known position. Tap Set to set the base
and configure the reference position in Survey Pro. If you
have a Recording Interval set, a file will be opened to log raw
GPS data for post processing, and the point name and
antenna height will be written to the file for this static
session.
Get Autonomous Position and Set Base
If your base point is a brand new point in this job, or, if it is
an existing point with local (NEE) coordinates but you do not
yet have a valid coordinate system solved, then you can start
the base with an autonomous position. Tap GET Position From
Receiver to get the latest autonomous coordinates (+- 10m) at
the base and use this as the initial reference position in your
survey. Tap Set to set the base and configure the reference
position in Survey Pro. If you have a Recording Interval set, a
file will be opened to log raw GPS data for post processing,
and the point name and antenna height will be written to the
file for this static session.
You will always have to solve a localization adjustment before
collecting data from an autonomous base.
Start GPS Survey - Rover Setup
Once the base is set, or if a remote base is already set and
broadcasting, you can proceed to the Set Rover
screen. You
are prompted to connect to a receiver. If you cho ose an RT K
Survey Pro GPS Quick Start Guide 9
rover receiver, you will proceed directly to the Set Rover
screen. If you choose an Ntrip rover, you are prom pted to
select an Ntrip service, then you proceed to the to the Set
Rover screen.
Select Ntrip Service
When using an Ntrip rover, Survey Pro opens the internet
connection, queries the GPS base server for the availabl e
Ntrip services, and displays these services in a list. Pick a
service and tap Connect > to proceed to the Set Rover screen.
Set Rover
Measure the rover antenna height, then tap Set>. The
receiver will be put in RTK rover mode, and will monitor the
data link until it receives the base reference positi on. Survey
Pro will check the point database for a matching point. If you
are using a remote base, we will find a matching point or
prompt you to store a new point. If you are using the base
station you just set in the previous step, then this check
serves as error detection.
If you have a Recording Interval set, a file will be opened to log
raw GPS data for post processing. This file will be opened for
stop and go sessions, so the antenna heights and point names
will be written to the file simultaneously with each RTK point
occupation.
Start GPS Survey – Solve Localization
You need to solve a localization adjustment whenever y ou
start a survey from an autonomous GPS position. Step one is
to use the Control Points
screen to collect GPS measurements
on points with known local coordinates. Step two is to use the
Solve Localization
wizard to calculate the localization
adjustment parameters. You can also tap Start Now> to
begin surveying right away with a temporary localization
adjustment.
10
Collecting Control
Tap Collect Control> to launch the GPS Contr ol Collection
screen. Choose existing points from your job to use as GPS
control points, and occupy those points with the rover
receiver.
You need a minimum of two horizontal control points to solve
a Ground – TDS Localization mode horizontal adjustment. You
need a minimum of one horizontal control po int to solve a
Mapping Plane mode horizontal adjustment. You need a
minimum of one vertical control points to solve a vertical
adjustment using a geoid model. You need a minimum of
three control points to solve a vertical adjustment without a
geoid model.
Once you have the minimum required number of points, you
will see a prompt. You can solve the adjustment at that time,
or you can choose to collect more control, and then tap
Projection to solve the adjustment later.
Solve Localization
Once you have collected the required number of horizontal
and vertical control, you can solve the localization
adjustment. Tap Solve Localization… to open the Solve
Localization wizard where you can pick from the available
control points to calculate the coordinate system adjustment.
Once you have solved the adjustment you are ready to start
data collection or stake out.
Start Now
When a localization is required, but you do not have the
necessary control information in the field, or if you want to
begin collecting data and you wish to occupy the required
control later in the survey, you can also tap Start Now> to
begin surveying right away. In this case, you start surveying
with a temporary localization to get you close to local
coordinates. You may then solve the localization at any time
during the survey field work, or even after the field work is
finished, and all GPS collected points will be updated to the
proper local coordinate.
Survey Pro GPS Quick Start Guide 11
Mapping Plane Zones and Ground Scale
If your horizontal projection mode is Ground – TDS
Localization, you do not need to worry at all about map
projections, datums, or scale for ground distances. Th e
default projection and localization adjustment take care of
that for you.
If you are using Mapping Plane mode, you need to select a
map projection from the database, and if you goi ng to
measure distances on the ground with an EDM, you need to
apply a scale factor. Applying a scale factor can be done in
one of two ways :
¾ You can use the selected mapping plane zone, with or
without a localization adjustment, and apply a
combined scale factor. When you use mapping plane
and a combined scale factor, the horizontal distances
are scaled to the map grid. To set the combined scale
factor, go to the Job
check the Use Scale box and tap Compute Scale. Select
your conventional occupy point and follow the wiza rd
instructions.
¾ You can use the selected mapping plane zone, with or
without a localization adjustment, and setup a Ground
Coordinates system. The Ground Coordinate system
will scale the mapping plane coordinates to ground
level. When you use Ground Coordinates, the
horizontal distances are 1:1 to the grid. To set a
Ground Coordinates system, go to the Survey
Projection screen and tap Setup Ground Coordinates….
Follow the wizard instructions to set up Ground
Coordinates and adjust all of the job file points to the
new system.
| Settings | Surveying screen,
|
Data Collection
Data Collection Settings
Use the Job
the receiver collects data, what raw data to write for each
point, and what criteria to check before accepting GPS
positions.
| Settings | Measure Mode screen to control how
12
Receiver Dynamics:
¾ Static on Occupy: will set the receiver to ‘static’ mode
for point occupations. When in static mode, the
receiver assumes no antenna movement and uses
advanced averaging techniques to compute the most
precise position possible.
¾ Dynamic Always will leave the receiver in ‘dynamic’
mode for point occupations.
Store GPS Raw Data:
¾ Lat, Lng, Ht will store an EP record in the .RAW file
for each point accepted.
¾ EP + Bl,CV will store an EP record, plus the raw base
line and variance covariance information in the .RAW
file (or .OBN file for Ashtech users)
¾ EP + Bl,CV + Rx Raw will store the EP,BL,CV records
in the .RAW file (or .OBN file for Ashtech users), and
send the station information to the observation file for
GPS post processing data collection.
¾ EP + Rx Raw will store an EP record in the .RAW file
and send the station information to the observation
file for GPS post processing data collection.
Accept Solution Quality and Criteria:
¾ Select to Accept either Fixed RTK only, or Code, Float,
or Fix positions.
¾ Choose a measurement criteria. Any non-zero values
will be used to check positions before they ar e stored.
¾ If you want to automatically store points that meet
your criteria after five epochs of data collection, check
the Automatically accept data collection points box.
Epoch Averaging:
This setting controls how many epochs of data Survey Pr o will
use to average the final position. It should usually be set to 1.
Note: Epoch Averaging should not be used when you Receiver
Dynamics are set to Static on Occupy. With any current GPS
firmware, a receiver in static mode will use a least squares
technique to give a progressively more precise position with
each subsequent epoch. Epoch Averaging in Survey Pro is a
simple averaging technique intended for old firmware or
when you are set to Dynamic Always.
Survey Pro GPS Quick Start Guide 13
Data Collection Functions
There are different methods to collect data:
Point: Use this function to take the most precise
measurement to a point. Depending on your settings, this
function will put the receiver into static mode, mark the event
in the post processing logging file, and open the Occupy Data
Points screen where you can remain in static mode for the
desired length of time and store the point.
Store SS: Use this function to quickly store a poin t with
slightly less precision. This function will use the latest
receiver position from the status message to store a point.
The receiver is not set to static mode and the Occupy Data
Points screen is not opened.
Offset: Use this function when you can not occupy the point of
interest directly with the RTK rover. This function allows you
to occupy a reference point and then measure an offset
distance (manually or with a laser range finder) to the point
of interest.
Feature: Use this function to collect multiple points with an
auto incremented point name. You can use a time or distance
interval to collect points continuously all with the same
description, layer, and attributes, or you store points
manually and be prompted for descriptions, layers, and
attributes for each point.
Control: Use this function to launch the GPS Control Points
screen, where you can add control points to your localization
adjustment, or take a check measurement to an existing
control point.
Post Process: Use this function to launch the RTK Rover
Session screen, where you can collect a separate stop and go
session in the receivers post processing log file. This function
is only applicable when you are doing simultaneous RTK and
post processing data collection.
Stake Out
Stake out with GPS is very similar to stake out with
conventional instruments. See the User’s Manual for details
14
on the different staking procedures. Below is a description of
the two special features of stakeout with GPS.
o >Roving / >Occupying
¾ When you first open any GPS staking screen, the GPS
receiver is in dynamic (moving) mode. This is
necessary as you navigate to the design point, and is
indicated on the screen with the toggle button in the
>Roving position.
¾ When you arrive at the design point, if you want to
take a more precise measurement, you can switch the
receiver to static mode by tapping the toggle to
>Occupying . This will change the receiver dynamics
(depending on your setting) and allow for the most
precise measurement on the design or as built point.
Note: When Store GPS Raw Data on the Job | Settings |
Measure Mode screen is set to + Rx. Raw (and / or +OBN for
Ashtech), switching from ROVING to OCCUPYING will start a
session in the receiver, so you will be prompted for a poi nt
name and description. The receiver session will be completed
and the measurement stored when you tap Done.
o 5 Hz Mode
The default behavior for stake out is to start all staking
screens in 5 Hz update mode. This sets the receiver to
update positions five times a second to make it easier to
find the design point when in >Roving mode. However,
the receiver is always less precise in 5 Hz mode, so when
you toggle to >Occupying, we automatically set the
receiver to One Hz updates to allow for the most precise
measurement
You can turn 5 Hz Mode on or off when you are roving
using the check box. You can override the default
behavior on the Job
| Settings | Stakeout screen.
Survey Pro GPS Quick Start Guide 15
Post Processing Data Collection
Data collection for post processing involves storing GPS raw
data to a file on disk. The file is usually stored on the
receiver’s internal memory, but for certain brands and
models, you can also store the data to a file on the data
collector. Raw data from multiple receivers is combined and
then PC software is used to process the base line
measurements. This section describes:
¾ How to open a data file and start recording GPS raw
data for post processing.
¾ How to start and stop static (fast static) as well as
stop and go data collection.
¾ What to do with the data.
Note: If you wish to log post processing data simultaneous
with RTK data collection, please see the previous section.
Post Processing Receiver and Settings
To do post processing data collection, you must first create a
post processing receiver profile. Please see the f irst section
for a description of the Receiver Setup
to make sure recording is turned on. Go to the Job
| Post Process
set to Off. You can also use this screen to select a special
layer for post processing points, and to turn on the Session
Monitor to warn you if data collection criteria is exceeded
during post processing sessions.
screen and check the Recording Interval is not
screen. You then need
| Settings
Start Receiver Recording
To open a data file and begin logging GPS raw data, go to the
Survey
processing file if you intend to leave the receiver stationary
over a point for the entire session. Choose to start a Stop and
Go post processing file if you intend to move around with the
receiver and stop on data collection points.
Measure the antenna height and tap Start Recording. If you
start a static file, the Static Receiver Session screen is opened
| Post Processing screen. Choose to start a Static post
16
where you enter the site ID and description. You can remain
connected to this receiver to monitor the entire session, or you
can leave it to log the data file unattended. If you start a stop
and go file, the Static Receiver Session
you control the receiver when you stop over a data point.
Note: The Post Processing screen will first check if the
connected receiver is the RTK base or rover. If you are
connected to the RTK base or rover receiver, your only option
here is to stop recording. To start recording with the base or
rover receiver, use RTK setup described in the previous
section.
If the connected receiver is already recording data, you can
tap Stop Recording to end logging and close the file.
screen is opened where
Post Processing Data Collection
After recording is started, the Static Receiver Session screen
is opened. You can also access this screen by going to the
Survey
post processing receiver. Use the followin g controls for post
processing data collection:
| Data Collection menu and choose to connect to a
Store Point In:
¾ Receiver and job file will mark the event in the post
processing logging file, and store a point in the Survey
Pro job. You can use this mode to save attribute or
layer information in the Survey Pro job file.
¾ Receiver file only will only mark the event in the post
processing logging file. In this mode, the Site ID does
not need to be a unique point name, and nothing is
stored in the Survey Pro job file. A note record is
made for this occupation in the Survey Pro raw file.
NOTE: By default, post processing points are stored in the
Survey Pro job file are put on a special layer to distin guish
them from other data collected points. Points stored in
Survey Pro job file will have a plane coordinate of (0,0,0) and
a geodetic coordinate from the receiver’s autonomous position.
Survey Pro GPS Quick Start Guide 17
Session Duration:
¾ Enter 0 or check Log Until Stop to have this session
run until you tap Stop.
¾ Enter the session time if you want Survey Pro to
mark the end of the session automatically after the
timed interval has elapsed.
Note: If you choose to do a timed session, you should not exit
from the Static Receiver Session screen until the timed
session is stopped.
Tap Start to mark the beginning of this site occupation in
the receiver’s raw data. If you are also storing the point
in the Survey Pro job file, it is written to the file and to
the RAW data now.
Tap Stop to end a session. You can also end a timed
session before the interval has elapsed.
Note: Most receivers do not support ‘canceling’ a point
occupation event after it is started. Therefore, even if y ou
cancel the occupation in Survey Pro, you will still likely see
the point occupation when the file is post processed.
File Processing
Use the software supplied by the receiver manufacturer to
download the files to your PC.
Use your GPS baseline processing software to combine
the raw data from different receivers and generate GPS
base lines.
Note: See the documentation supplied with your PC software
for details on downloading and processing GPS raw data from
the receiver’s internal memory.
TRIPOD DATA SYSTEMS, INC.
P.O. Box 947, Corvallis, Oregon, 97339-0947
Technical Support: 541-757-7254
or visit www.tdsway.com
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