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Oxford Technical Solutions Ltd 

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Page 12 of 14 

 

 

Initialisation and warm-up 

To initialise the RT-

Backpack exceed the “initialisation speed” specified in NAVconfig Options (Page 

11). It is important to walk forwards and in a straight line the first time the initialisation speed is 
exceeded. 

Figure 11. Operating the RT-Backpack 

  

 
It is important not to spin too quickly when wearing the RT-Backpack as this can saturate the gyros. 
The RT sensor is designed to work on vehicles, boats and aircraft. Humans can spin much faster and 
therefore exceed the operating thresholds of the sensors. Care should also be taken when donning 
the backpack for the same reason. If the specification of the gyros is exceeded, the RT may need to 
be reset and go through the initialisation and warm-up process again. 

Data from the RT-Backpack can also be monitored in the RT-Range software, using the Real-time 
display window. A full explanation of this can be found in the RT-Range manual in the Real-time 
display section. It is worth noting that even though the RT-Backpack is transmitting data to the 
RT-Range, it does not mean the RT-Backpack has achieved its expected accuracy, and care should 
be taken to check this before any test commences. 

During tests it is quite feasible for the person wearing the RT-Backpack to monitor its status using 
NAVdisplay and a laptop PC connected wirelessly to the relevant RT device. Doing this will not affect 
the performance of the RT-Backpack or the data being broadcast to the hunter RT-Range device. 

Charging the battery 

The RT-Backpack is supplied with a maintenance-free, rechargeable lead acid battery and mains-
powered charger. In ideal conditions the battery should provide approximately three-to-four hours of 
use before needing a charge

—although it is advisable to start any test with the battery in a fully 

charged state. 

While it is impractical to walk around with the RT-Backpack while charging, configuration changes or 
bench-tests can be conducted while the system charges. The battery can be charged without 
powering down the RT-Backpack. 

Using the RT-XLAN 

The RT-XLAN in the RT-Backpack will come pre-

configured as a “client” and will be ready to be used 

as a target. 

Содержание RT-Backpack

Страница 1: ...User Manual RT Backpack Vehicle to pedestrian tracking ...

Страница 2: ...mited All brand names are trademarks of their respective holders The software is provided by the contributors as is and any express or implied warranties including but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed In no event shall the contributors be liable for any direct indirect incidental special exemplary or consequential damages ...

Страница 3: ...ord Technical Solutions Limited personnel or by personnel expressly authorised by Oxford Technical Solutions Limited for this purpose In no event will Oxford Technical Solutions Limited be liable for any indirect incidental special or consequential damages whether through tort contract or otherwise This warranty is expressly in lieu of all other warranties expressed or implied including without li...

Страница 4: ...otection 2 System overview 4 Scope of delivery 4 Specification 5 Assembly instructions 5 Configuring the RT Backpack 6 NAVconfig settings 6 NAVconfig Options 11 RT Range Settings 11 Initialisation and warm up 12 Charging the battery 12 Using the RT XLAN 12 Configuration 13 Operation 13 LED indicators 13 Checking the communication link 14 Revision history 14 ...

Страница 5: ...ck is covered in this manual All other relevant information can be found in the RT Range manual Scope of delivery Table 1 lists all standard items delivered with the RT Backpack Table 2 lists optional components Table 1 Standard RT Backpack Components Qty Description 1 Backpack 1 Frame including fasteners 1 50 cm pole including fasteners 1 RT Backpack bolt pack Qty 5 x M4x8 hex bolts washers 3 mm ...

Страница 6: ... Push the end back through the slot closest to the edge of the frame Place radio with the TNC connector at the top on the bracket and secure with the hook and loop strap 3 Use the U bolts and dome head nuts to fix the mounting pole and antenna 1 into the frame with a 10 mm spanner A flat washer and spring washer should be fitted under each nut Attach one end of the antenna cable to the antenna Ens...

Страница 7: ... The RT XLAN 7 should be attached to the Base to Antenna Extension Pole fixed to the boss on the frame front plate The RT XLAN can then be height adjusted for maximum performance 8 The RT Backpack is turned on using the toggle switch mounted near the top of the RT sensor NB this switch is located under the charging point 3 Figure 1 Assembly of the RT Backpack Configuring the RT Backpack NAVconfig ...

Страница 8: ...NAVconfig This is normally located at C Program Files x86 OxTS RT Range RT Back Use the Read Settings from a Folder option to locate it See Figure 3 Figure 3 NAVconfig Step 2 Read Configuration In an RT Backpack application the y axis always points left and the z axis always points forwards Figure 4 This is set automatically from the predefined settings file ...

Страница 9: ... read from the predefined settings file when used Figure 5 It is important to re check the Above measurement as the antenna pole may be set to a different height z axis to the one used in the settings file Figure 5 NAVconfig Step 4 Primary Antenna The RT Backpack does not use dual antennas so make sure that option is disabled Figure 6 ...

Страница 10: ...Figure 7 is not applicable to the RT Backpack Ensure it is disabled Figure 7 NAVconfig Step 6 Advanced Slip Several settings should be checked on the options page Figure 8 Most importantly Displace Output should be disabled The RT Range applies any displacement For a full explanation of options see NAVconfig Options on page 11 ...

Страница 11: ...ure 9 make sure the correct RT is selected as several may be available on the network Figure 9 NAVconfig Step 8 Commit It is not necessary to save a copy of any settings Figure 10 as they can be read from the device using NAVconfig Several files are created when saving settings so it is best to create a new folder for each set ...

Страница 12: ...s specification in open sky mode Differential when using radio modem DGPS corrections these need setting See the Differential Correction Option section of the RT Manual SBAS see SBAS Option section of RT manual OmniSTAR see OmniSTAR Option section of RT manual Heading Lock this must be disabled in an RT Backpack application Initialisation Speed this should be set to the speed of a brisk walk 1 m s...

Страница 13: ...on It is worth noting that even though the RT Backpack is transmitting data to the RT Range it does not mean the RT Backpack has achieved its expected accuracy and care should be taken to check this before any test commences During tests it is quite feasible for the person wearing the RT Backpack to monitor its status using NAVdisplay and a laptop PC connected wirelessly to the relevant RT device ...

Страница 14: ...nge should not conflict with the recommended IP addresses of other OxTS equipment The RT XLAN will be configured for use in a specific country Different licensing laws require different frequencies to be used in different countries RT XLAN units from one country cannot be used automatically with RT XLAN units from another country It is possible to change the configuration in the field but it is ne...

Страница 15: ...less communication and then on the remote side i e through one RT XLAN to another If the RT XLAN is working then packets from RT systems should be visible from any node NAVdisplay can be used to receive the packets The LED indicators on the RT XLAN will provide a quick indication of a communication link and the strength of the signal as shown in Table 4 Revision history Table 5 Revision history Re...

Страница 16: ...Oxford Technical Solutions Ltd ...

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