Husky MP2500 User manual

Documentation P0101211, July 2001, Rev. C
Supersedes Documentation DSNP100493, February 2001, Rev. B
Table of Contents
Introduction ................................................................... 1
Husky MP2500 Palmtop: important keys ................ 2
Choosing an installation site for the station ..................... 4
Preparing and starting up the station .............................. 5
Preparing and starting up the rover................................. 8
Using the Logging function ............................................ 12
Using the Stake out function.......................................... 14
Using the Trajecto function............................................ 19
Reading survey results on the palmtop........................... 20
Raw data recording ....................................................... 21
Checking the entered position at the station ................... 23
Receiver: push-button and LEDs .................................... 24
Palmtop: Status bar....................................................... 26
GPS antenna height....................................................... 28
Using the GSM option .................................................... 29

If the Husky has been left uncharged for
quite a long time , connect it to the charger
then re-initialize the Husky by simultaneously
holding down the 3 keys ñ + ñ + for a few
seconds. Let the battery be recharged for a
few hours before use.

1
Introduction
This guide should help you carry out your first field surveys using a
system from the 6500/6300 series.
Below are the main functions which can be performed:
-
Logging : the rover will compute and save the position of any point
in the working area once the antenna rod is placed on this point.
-
Stake out : the rover will guide you to the planned points of the open
job so that you can stake them out in the field. It will compute and
save their positions for further comparison against the project points.
-
Trajectory : the rover will automatically log points along a
trajectory, at regular intervals of time or distance.
-
Raw data recording: a function shared by rovers and stations for
post-processing applications.
The following functions do not fall within the scope of this guide:
surveying a profile, resorting to offset methods in logging and stake-out
functions, computing distances and areas, creating points and lines, raw
data recording according to programmed sessions, computing a local
grid or altitude correction, loading a geoid...
For more information about these topics, please refer to the Reference
Manual Part No. P0100386 provided on CD-ROM.
Please, do not throw away this guide once you get familiar with the
system, but instead, use it as a memo.

2
Husky MP2500 Palmtop: important keys
: ON/OFF key
: “ Shift ” key (one on either
side of the
Yes key). Allows entry
of characters printed above keys
+ L :Enables or disables
screen back-lighting
+ or : Used for
screen contrast setting
+ : Under DOS, used
for step-by-step scrolling-up in a
list of files
: When depressed
simultaneously for about 5
seconds, allows the palmtop to be
re-started after a fatal error (same
as “CTRL+ALT+DEL” on a PC)
:“ Yes ” or Enter key
(same as Enter key on a PC)
: Used to move the
cursor on the screen from one
field to another, from one menu option to another. Used
to scroll up and down a list of points, jobs or files.
Battery cap
Com 2
RS232
NEVER EVER use the
“FORMAT” or “DEL *.*”
command on the MP2500 or
else you would have to
send it back to Husky Ltd
for maintenance

3
: If a Functions menu is displayed, selects respectively the
next or previous Functions menu (i.e. on right- or left-
adjacent icon). In other cases, moves the cursor
respectively to the next or previous field.
If a parameter is preceded or followed by , allows
you to display respectively the parameter’s possible
options or characteristics.
F1 : Displays the context-sensitive Help menu
+F1 : Provides unconditional access to the Notes file
F2 : Displays the last computed position (on rover)
F3 : “ Save” key
F4 : Allows you to quit the program
Esc : Allows you to come back to the previous screen, to
remove the
Help menu from the screen, to cancel all
changes in progress on a parameter, or, right after the
self-tests, to display the main menu
PgUp
& PgDn
: Allow you to scroll up and down a list in a page-by-page
mode, or a function that does not fit on a single screen.
In stake out, allows you to zoom in (PgUp) or zoom out
(PgDn) when guidance screen is displayed
Home : Displays beginning of list
End : Displays end of list
Del : If a points list is displayed and a logged or staked out
point is selected, cancels the coordinates computed for
this point.

4
Choosing an installation site for the station
Choose a site whose position is accurately known and offering an open
view of the sky in all directions. In fact, the presence of buildings or
vegetation in the vicinity:
- will hinder GPS reception for low elevation angles, and so will
reduce the number of satellites visible from the station
- will bring about multi-path effects likely to impair the system’s
accuracy.
Check for the absence of obstacles in the direction of the working area.
Their presence nearby is liable to reduce the coverage of the UHF
radio link (U-LINK).
Masked satellite
(hence useless)
A
void
multi-path
effects
Satellites properl
y
received
Masked satellite
(hence useless)
Rover’s workin
g
area
(top view)
Station’s
UHF radio
antenna
GPS UHF

5
Preparing and starting up the station
1. Connect the various items of the station together (see below).
2.
Measure the height of the GPS antenna phase center from the
ground according to one of the three possible methods (see p. 28).
Coaxial
Palmtop
(required at start up
and for monitoring)
RS232
Receiver
unit
External battery
(not supplied)
Btt i
t
Swapping the battery
for another is possible
without having to shut
down the station
UHF antenna
& transmitter
Battery compartment (empty if
an external battery is used)
Câble C5050196
Cable P0100349
Cable P0100289
(10 meters)
Powe
r
RS422 Cable P076501A
For SP-t
y
pe stations, no UHF transmitter & antenna, with
nothing connected to the RS422 port at the rear of the unit
Required for … SK stations
Battery capacity: 20 Ah minimum for
an operating time of 10 to 12 hours on
average
Mounted on a separate mast
placed at some distance from
the GPS antenna
NAP00x
GPS
antenna
Phase cente
r
1.2 cm
3.6 cm
(1)
(4) (3) (2)
++- -

6
3. Switch on the palmtop (red key).
4. When « C:\> < » is displayed, type in “ t ” then press .
5. Select “Station” as shown below by pressing :
then press .
6. Follow the instructions below leading to having the station
transmitting after entry of the required parameters (measured
antenna height, coordinates and No. of station, carrier frequency,
transmitted data type & transmit rate):
Measured hei
g
ht
(See also page 28)
Measurement method
(use after selecting this field)
A
ntenna t
y
pe
(Akey)
Next screen
Station’s
coordinates
Cont’d on next pa
g
e
Next screen (See page 23)
True hei
g
ht
(deduced from
entered height)
If
y
ou are in trouble,
press to
display help!

7
At the end of the survey, just hold down the receiver push-button
depressed for a few seconds (see page 24) to shut down the station.
*- Station number: choose any number between 1 and 99; specific to the station (it must not
be used by another station operating nearby on the same frequency).
- Frequency: enter the value of the authorized UHF transmission frequency, in MHz.
To start transmittin
g
Write down the beacon
ID & frequency entered
here* (later, you will
have to check that the
rover also uses these 2
parameters)
1: “ON” is displa
y
ed here
3: This LED
flashes at
transmit rate
2: “Filled up”
ico
n
The station transmits when:
twice to quit the pro
g
ram
to shut down the palmtop
Disconnect the palmtop from the station
then
Minimum transmit rate: 1 s

8
Preparing and starting up the rover
1. Connect the various items of the rover together according to
rover type & carrying mode chosen (see below or opposite).
MP-t
y
pe rover carried on belt, “all-on-the-
rod”, or on shoulder strap
Hei
g
ht of GPS
antenna on rod
C0000200
(g
raphite epox
y
composite,
2 m long):
2.036 m
Coaxial
(Palmtop)
RS232
Receiver
unit
Batteries
NAP00x
GPS
antenna
Phase center
3.6 cm
Cable P0100350
Cable P076501A