GeoSIG GXR-GPS User manual
GeoSIG Ltd, Ahornweg 5A, 5504 Othmarsingen, Switzerland
Phone: + 41 44 810 2150, Fax: + 41 44 810 2350
GXR-GPS
GXR-GPS-485
User Manual
GeoSIG Ltd GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010
Page ii GPS User Manual
Document Revision
Author Ricardo Araujo
Checked Ralph Boeniger
Approved Dr. Talhan Biro
Version Action
25.04.2005 First Issue (RA)
26.05.2005 Revision for User Manual and formatting (TB)
18.09.2009 Pictures Fig.4 and 10 replaced by actual ones (THL)
22.06.2010 Update with GXR-GPS-485 (ANB)
Disclaimer
GeoSIG Ltd reserves the right to change the information contained in this document without notice. While the information contained
herein is assumed to be accurate, GeoSIG Ltd assumes no responsibility for any errors or omissions.
Copyright Notice
No part of this document may be reproduced without the prior written consent of GeoSIG Ltd. The software described in this document
is furnished under a license and may only be used or copied in accordance with the terms of such a license.
Trademark
A
ll brand and product names mentioned are trademarks or registered trademarks of their respective holders.
A
ll rights reserved.
GeoSIG Ltd
Switzerland
GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010 GeoSIG Ltd
GPS User Manual Page iii
Table of Contents
Warnings and Safety.......................................................................................................... iv
Symbols and Abbreviations................................................................................................ iv
1. Introduction......................................................................................................................1
2. Electrical Connection.......................................................................................................2
2.1. GPS Main Connector Pin Assignment....................................................................................................2
2.2. Mating Connector at the Instrument Side ...............................................................................................3
2.3. Cable Connection GXR-GPS..................................................................................................................4
2.4. Cable Connection GXR-GPS-485...........................................................................................................5
2.5. Mounting the GPS Box............................................................................................................................6
3. Configuration and Checking ............................................................................................7
3.1. With a GSR-xx ........................................................................................................................................7
3.2. With a CR-5P ..........................................................................................................................................8
GeoSIG Ltd GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010
Page iv GPS User Manual
Warnings and Safety
a
The GPS s
y
stem is operated b
y
the
g
overnment of the United States of America, which is
solely responsible for its accuracy and maintenance.
a
GPS provides only UTC time at 0° Greenwich meridian without summer time adjustment.
Symbols and Abbreviations
Instrument GeoSIG Recorder, Digitiser or Data Acquisition system
GPS Global Positioning System
UTC Coordinated Universal Time
GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010 GeoSIG Ltd
GPS User Manual Page 1
1. Introduction
This document describes the principle of operation and installation instructions of the GXR-GPS GPS
family, which is a GPS module based on a Garmin GPS type GPS-35-HVS.
GXR-GPS is used with GeoSIG Instruments to provide the global coordinates of the GPS antenna and
accurate date and time to the Instruments. It’s very useful for having one or several interconnected
Instruments precisely synchronised.
a
GPS provides only UTC time at 0° Greenwich meridian without summer time adjustment.
GXR-GPS is provided in a box with a cable length to be defined at the time of order or provided by the
customer. Upto 70 m cable length is possible with the standard GXR-GPS, upto 1’000 m with the
optional GXR-GPS-485.
All instructions within this User Manual also apply to the GXR-GPS-485, whenever only GXR-GPS is
mentioned.
a
GeoSIG standard cable type: XY DIN 5 x 0.25 mm2 gr UL style2464.
Figure 1. GXR-GPS assembled with 20 m of cable for an Instrument
GeoSIG Ltd GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010
Page 2 GPS User Manual
2. Electrical Connection
2.1. GPS Main Connector Pin Assignment
The GXR-GPS is provided with an 8 pin main connector inside the box.
Before connecting the connector, the cable should be passed through the cable inlet assembled on
the housing.
The cable end sleeves should be used for a proper connection of the cable on the connector.
Table 1. Electrical connections of the GXR-GPS connector
Pin Signal Standard cable colors Comment
1 GPS_RXD White Transmit signal of GSR
2 GPS_TXD Brown Reception signal of GSR
3 GPS_1PPS Green 1 PPS signal from GPS
4 V_MAIN Yellow 12V power from instrument
5 GPS_STDBY N/A Usually not connected
6 GND Grey Ground from instrument
7 GND N/A Usually not connected
8 GND N/A Usually not connected
Table 2. Electrical connections of the GXR-GPS-485 connector
Pin Signal Standard cable colors Comment
1 TX_H White Transmit signal of CR-5P
2 RX_H N/A Usually not connected
3 TX_L Brown Reception signal of CR-5P
4 RX_L N/A Usually not connected
5 GPS_SYNC Green 1 PPS signal from GPS
6 V_MAIN Yellow 12V power from instrument
7 GND Grey Ground from instrument
8 GND N/A Usually not connected
Figure 2. Connector pin out GXR-GPS
18
81
Figure 3. Connector pin out GXR-GPS-485
Figure 4. Connector wiring GXR-GPS
Figure 5. Connector wiring GXR-GPS-485
GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010 GeoSIG Ltd
GPS User Manual Page 3
2.2. Mating Connector at the Instrument Side
For connecting the GXR-GPS to an Instrument, a mating connector must be used. This connector is
provided with the Instrument.
With a GSR-xx, the connector must be connected to the OPTION connector of the instrument, if not
otherwise specified.
With a CR-5P, the connector must be connected to the SYN in connector of the instrument.
Table 3. Electrical connections of the GXR-GPS input connector of an instrument
Pin Signal Standard Cable Colors Comment
1 GSR_G_TXD White Transmit signal of GSR
2 GSR_G_RXD Brown Reception signal of GSR
3 N/A N/A Not connected
4 N/A N/A Not connected
5 GSR_G_1PPS Green 1 PPS signal from GPS
6 GSR_G_12V Yellow 12V power from instrument
7 GSR_G_GND Grey Ground from instrument
Table 4. Electrical connections of the GXR-GPS-485 input connector of an instrument
Pin Signal Standard Cable Colors Comment
1 N/A N/A Not connected
2 SYNCI_RX+ White Transmit signal of CR-5P
3 N/A N/A Not connected
4 SYNCI_RX- Brown Reception signal of GSR
5 GPS_1PPS Green 1 PPS signal from GPS
6 V_EXT_GPS Yellow 12V power from instrument
7 GND_EXT Grey Ground from instrument
Figure 6. Mating Binder connector
Figure 7. Connector pin out
Figure 8. Wiring inside the connector
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Page 4 GPS User Manual
2.3. Cable Connection GXR-GPS
Connection to GS_GPSA_J1
Type: Isolated cable end sleeve 0.25 mm2 x 6 mm
GSN: 5x #PD003.060.001.IN
123456 7 8
1234
A
B
C
D
A
C
E
B
56
E
78
D
GS_GPS
Size:
Page:
Version:
GPS Box, GPS Cable
1 of 1
Project :
Title :
A3
Scale:
1:1
0
Remark:
File:
GS_GPS_Box_Cable.skf
Date:
22.04.2005
Drawn by:
Checked by:
Approved by:
MS
RB
CHK
Unit:
mm
Revision: *
Cable
Type: Datacable DIN 5x0.25 mm2, d = 11 mm, no shield, length: xx m
GSN: #CA005.025.001.05
G_TX_H1G_RX_H2
3G_485_R_L4GPS_SYNC5GPS_POWER6GND7
Connecton to GSRHousing
Type: Binder Serie 693, 7 P, M
GSN: #J_CIR.007.002.M
brown
G_485_T_L -
green
yellow
grey
-
white
GSR_G_RXD2brown
GSR_G_1PPS3green
GSR_G_12V4GSR_G_GND6grey
yellow
GSR_G_TXD1white
25
510
Schrinkable tubing 3 to 1 mm
GSN: #RE030.BLK.001
Shrinkable tubing 9 to 3 mm
GSN: #RE090.BLK.001
129
xx
30
96
Figure 9. Cable connection GXR-GPS
GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010 GeoSIG Ltd
GPS User Manual Page 5
2.4. Cable Connection GXR-GPS-485
123456 7 8
1234
A
B
C
D
A
C
E
B
56
E
78
D
GS_CR5P
Size:
Page:
Version:
GPS RS-485 Cable
1 of 1
Project :
Title :
A3
Scale:
1:10
File:
GXR-GPS-485.SKF
Date:
03.11.2008
Drawn by:
Checked by:
Approved by:
TL
CHK
Unit:
mm
Revision: -
Connector
Type: BLA 8 SN OR, 8p
GSN: #J_WIR.008.001.F
Connector
Type: Binder, 7p, Male
GSN: #J_CIR.007.003.M
SYNCI_RX+2white
SYNCI_1PPS-3NC
4
5green
V_EXT_GPS6yellow
brown
SYNCI_1PPS+1NC
Cable
Type: GPS cable, 25 m grey, XY DIN5x0.25 gu UL Style 2464
GSN: #CA005.025.003.05
SYNCI_RX-
GSR_1PPS
RX_H2NC
TX_L3brown
4
5green
NC
TX_H1white
RX_L
GPS_SYNC
6yellowV_MAIN
7greyGND
50.0
9.0
Shrinkable tubbing 6 mm
GSN: #RE060.BLK.001
8.5
GND_EXT7grey
8NCGND
50.0
9.0
Pod insulated
GSN: #PD003.080.001.IN
Shrinkable tubbing 6 mm
GSN: #RE060.BLK.001
8.5
1
8
1
8
10.0
Shrinkable tubbing 3 mm
GSN: #RE030.BLK.001
Remarks:
Move the cable to cross the gland before to screw
the connector wiedmuller
Figure 10. Cable connection GXR-GPS-485
GeoSIG Ltd GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010
Page 6 GPS User Manual
2.5. Mounting the GPS Box
a
It is recommended to perform a check of the GPS function before mountin
g
the box to its
final location, as described in section 3.
The GXR-GPS box can be fixed to various locations. The position of the box should be defined
according to a position where GPS antenna can easily get the satellite signals. Typically the box is
fixed on an outside wall or on a roof. This is an important point since for the synchronisation of the
instrument, the antenna should receive at least signals from 3 satellites.
a
Make sure that at least 75% of the sky is visible at all times over the GPS box.
Fixation of the housing should be done with M4 screws. With spacings and locations as shown in
Figure 11, Figure 12 and Figure 13. Type of screws depends on the type of surface where box is
going to be fixed.
Figure 11. Mechanical fixation of housing
Figure 12. Inside view of the GXR-GPS housing
Figure 13. Inside view of the GXR-GPS-485 housing
GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010 GeoSIG Ltd
GPS User Manual Page 7
3. Configuration and Checking
3.1. With a GSR-xx
In order to synchronise a GeoSIG GSR-xx with the GPS, appropriate configuration should be made in
the Instrument. Once power supply, computer and GPS are connected to the Instrument, such
configuration and checks can be performed using GeoDAS and logging into the Instrument.
a
For more details about the GPS options, please consult GeoDAS and relevant Instrument
manuals.
a
At first installation or after a major (>2’000 km) relocation, it may take upto 5 minutes for
the GPS to correctly compute the exact location of the antenna.
The following is a brief recipe to check whether everything is operational in terms of the GPS:
•On “Instrument” tab, “Garmin GPS” option should be ticked as a peripheral device as shown on
Figure 14.
•On the “Date and Time” tab, as shown on Figure 15,GPS status should read “Enabled”,
if not, press the “Enable GPS” button.
a
Note that if GPS is enabled, this button reads “Disable GPS”.
•When GPS is synchronised, the date and time of the GPS can be seen in the “Date and Time” tab
and the global coordinates of the GPS antenna can be seen in the “Station” tab, as shown on
Figure 16.
Figure 14. Selecting GPS as peripheral device
Figure 15. GPS enabling and checking
Figure 16. GPS time and position checking
GeoSIG Ltd GS_GXR_GPS_User_Manual_V03.doc / 22.06.2010
Page 8 GPS User Manual
3.2. With a CR-5P
In order to synchronise a GeoSIG CR-5P with the GPS, appropriate configuration should be made in
the Instrument. Once power supply, computer and GPS are connected to the Instrument, such
configuration and checks can be performed using GeoDAS and logging into the Instrument.
a
For more details about the GPS options, please consult GeoDAS and relevant Instrument
manuals.
a
At first installation or after a major (>2’000 km) relocation, it may take upto 5 minutes for
the GPS to correctly compute the exact location of the antenna.
The following is a brief recipe to check whether everything is operational in terms of the GPS:
•While adding the CR-5P under “Channels of Digitizers”, make sure ‘External SYNC Signal’ is
selected as Time source, as shown in Figure 17.
•After adding the CR-5P to GeoDAS restart the Software and the Window “Stations: Data Stream”
will appear.
•When GPS is synchronised, the ‘GPS status’ will read “Locked to GPS”, as shown in Figure 18.
The Data Stream in the ‘Data Monitor’ will be in yellow, as shown in Figure 19.
a
Note that if no GPS is connected, GPS status will read “No Lock” and the colour of the
Data Stream will be white.
Figure 17. Set ‘External SYNC Signal’ as Time source
Figure 18. GPS status as ‘Locked to GPS’
Figure 19. Data Stream is in yellow
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