Topcon SRL-35 Operator's Manual

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SRL-35

Operator’s Manual

Part Number 1003224-01

Rev. B

©Copyright September, 2013

may not be used, accessed, copied, stored, displayed, sold, modified, published, distributed, or otherwise

reproduced without express written consent from Topcon.

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Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Restrictions on Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Components and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SRL-35 Special Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Call Sign. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Temperature Protection of RF Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Protection of Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Radio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Display and Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SRL-35 LCD Display After Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Display in Data Transfer Mode (transmit/receive mode) . . . . . . . . . . . . . . 8

Info - Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Display in Info Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Display in Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

RF Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Priority RX/TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Forward Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Error Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

User Data Whitening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Transparent Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Serial Interface, Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Handshake Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

CTS-line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

CD-line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

RTS-line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Radio Protocol Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Timing and Delays During Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Data Buffering in the Radio Data Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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Pause Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

TX Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Short Data Block Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Long Data Block Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Latency in PCC Transparent Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Transmission Delays using Pacific Crest 4FSK on 25 kHz channel . . . . . . . . . . . . . . 18

Transmission Delays using Pacific Crest GMSK on 25 kHz channel . . . . . . . . . . . . . 19

Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Programming Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Changing Parameters using TRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Connecting in Modem Managing Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Configuring Radio in Modem Managing Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Loading Frequencies/Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Changing Parameters using the LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Changing Channel (Channel of the Active TX/RX Radio with Preset Frequencies) . . . . . . . . 27

Changing Protocol (Radio Protocol of the Active Radio) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Select Repeater (Set SRL-35 to Act as a Repeater) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Select FEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Saving Parameter Setup Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

TrimTalk, and Pacific Crest Mode Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Installation of a Radio Data Modem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

RS-232 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Mobile Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Base Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

General Antenna Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Factors Affecting the Quality and Distance of the Radio Connection . . . . . . . . . . . . . . . . . . . 36

Radio Field Strength. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Repeater Mode and Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Transmission: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Reception: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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Connection Between Two Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

System of One Base Station and Several Substations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Using Repeaters and Addresses in the Same System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

System with Several Repeaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Repeater Chain Using Address Pairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Repeater Chain using Dual Addressing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Redundant Repeater Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Local/Remote Address Compatibility with PDL Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Data Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Antenna Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Warranty and Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Functional Delays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Transmission Related Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Transmission Delays When the Radio TX Frequency is Changed . . . . . . . . . . . . . . . . . . . . . . 54

Transmission Delays When Using a 12.5 kHz Radio Channel . . . . . . . . . . . . . . . . . . . . . . . . . 54

Transmission Delays without FEC-function (Forward Error Correction) . . . . . . . . . 54

Transmission Delays with FEC-function (Forward Error Correction) . . . . . . . . . . . 55

Transmission Delays using a 25 kHz Radio Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Transmission Delays without FEC Function (Forward Error Correction) . . . . . . . . . 56

Transmission Delays with FEC Function (Forward Error Correction) . . . . . . . . . . . 57

Appendix C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Changing Parameters Using a Terminal Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Changing the Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Restoring Factory Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Changing Frequency (Active Radio Channel Frequency) . . . . . . . . . . . . . . . . . . . . . 61

Changing Reference Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Changing Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Changing Radio Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Changing Addressing Settings (Primary And Secondary RX and TX Addresses) . . . 65

Changing Serial Port Settings (Port 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Modification of Handshaking Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Special Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Activating Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

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Restoring Factory Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Saving Modified Settings into the Permanent Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Changing Parameters Using the SL Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Radio Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Configuration of Radio Protocol using SL Commands . . . . . . . . . . . . . . . . 76

Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Regulatory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Product Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

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Preface

Thank you for purchasing this Topcon product. The materials available in this Manual (the “Manual”) have been prepared by Topcon Positioning Systems, Inc. (“TPS”) for owners of Topcon products, and are designed to assist owners with the use of the product and its use is subject to these terms and conditions (the “Terms and Conditions”).

Please read the terms and conditions carefully.

Terms and Conditions

Use

This product is designed to be used by a professional. The user should have a good knowledge of the safe use of the product and implement the types of safety procedures recommended by the local government protection agency for both private use and commercial job sites.

Copyrights

All information contained in this Manual is the intellectual property of, and copyrighted material of TPS. All rights are reserved. Do not use, access, copy, store, display, create derivative works of, sell, modify, publish, distribute, or allow any third party access to, any graphics, content, information or data in this Manual without TPS’ express written consent and may only use such information for the care and operation of the product. The information and data in this Manual are a valuable asset of TPS and are developed by the expenditure of considerable work, time and money, and are the result of original selection, coordination and arrangement by TPS.

Trademarks

SRL-35™, TRU™, Topcon® and Topcon Positioning Systems™ are trademarks or registered trademarks of TPS. Windows® is a registered trademark of Microsoft Corporation. The Bluetooth® word mark and logos are owned by Bluetooth SIG, Inc. and any use of such marks by Topcon Positioning Systems, Inc. is used under license. Other product and company names mentioned herein may be trademarks of their respective owners.

Disclaimer of Warranty

EXCEPT FOR ANY WARRANTIES IN AN APPENDIX OR A WARRANTY CARD ACCOMPANYING THE PRODUCT, THIS MANUAL AND THE PRODUCT ARE PROVIDED “AS-IS.” THERE ARE NO OTHER WARRANTIES. TPS DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR USE OR PURPOSE. TPS AND ITS DISTRIBUTORS SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE OR USE OF THIS MATERIAL OR THE PRODUCT. SUCH DISCLAIMED

Preface

SRL-35 Operator’s Manual P/N: 1003224-01

DAMAGES INCLUDE BUT ARE NOT LIMITED TO LOSS OF TIME, LOSS OR DESTRUCTION OF DATA, LOSS OF PROFIT, SAVINGS OR REVENUE, OR LOSS OF THE PRODUCT’S USE. IN ADDITION TPS IS NOT RESPONSIBLE OR LIABLE FOR DAMAGES OR COSTS INCURRED IN CONNECTION WITH OBTAINING SUBSTITUTE PRODUCTS OR SOFTWARE, CLAIMS BY OTHERS, INCONVENIENCE, OR ANY OTHER COSTS. IN ANY EVENT, TPS SHALL HAVE NO LIABILITY FOR DAMAGES OR OTHERWISE TO YOU OR ANY OTHER PERSON OR ENTITY IN EXCESS OF THE PURCHASE PRICE FOR THE PRODUCT.

License Agreement

Use of any computer programs or software supplied by TPS or downloaded from a TPS website (the “Software”) in connection with the product constitutes acceptance of these Terms and Conditions in this Manual and an agreement to abide by these Terms and Conditions. The user is granted a personal, nonexclusive, non-transferable license to use such Software under the terms stated herein and in any case only with a single product or single computer. You may not assign or transfer the Software or this license without the express written consent of TPS. This license is effective until terminated. You may terminate the license at any time by destroying the Software and Manual. TPS may terminate the license if you fail to comply with any of the Terms or Conditions. You agree to destroy the Software and manual upon termination of the use of the product. All ownership, copyright and other intellectual property rights in and to the Software belong to TPS. If these license terms are not acceptable, return any unused software and manual.

Preface

Confidentiality

This Manual, its contents and the Software (collectively, the “Confidential Information”) are the confidential and proprietary information of TPS. You agree to treat TPS’ Confidential Information with a degree of care no less stringent that the degree of care you would use in safeguarding your own most valuable trade secrets. Nothing in this paragraph shall restrict you from disclosing Confidential Information to your employees as may be necessary or appropriate to operate or care for the product. Such employees must also keep the Confidentiality Information confidential. In the event you become legally compelled to disclose any of the Confidential Information, you shall give TPS immediate notice so that it may seek a protective order or other appropriate remedy.

Website; Other Statements

No statement contained at the TPS website (or any other website) or in any other advertisements or TPS literature or made by an employee or independent contractor of TPS modifies these Terms and Conditions (including the Software license, warranty and limitation of liability).

Safety

Improper use of the product can lead to injury to persons or property and/or malfunction of the product. The product should only be repaired by authorized TPS warranty service centers. Users should review and heed the safety warnings in an Appendix.

Restrictions on Use

SRL-35

from one region and/or country to another. The user of a radio modem must take care that the said device is not operated without the permission of the local authorities on frequencies other than those specifically reserved and intended for use without a specific permit.

radio modems have been designed to operate on frequency ranges, the exact use of which differs

SRL-35 Operator’s Manual P/N: 1003224-01

The allowed max output power depends on the type of station.

Preface

SRL-35

is allowed to be used in the following countries, either on license free channels or on channels where the operation requires a license. More detailed information is available at the local frequency management authority.

Countries: AT, AU, BE, BG, CA, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MT, NL, NO, PL, PT, RO, RU, SE, SK and US.

WARNING!

Users of SRL-35 radio modems in North America should be aware, that due to the allocation of the frequency band 406.0 – 406.1 MHz for government use only, the use of radio modem on this frequency band without a proper permit is strictly forbidden.

Miscellaneous

The above Terms and Conditions may be amended, modified, superseded, or canceled, at any time by TPS. The above Terms and Conditions will be governed by, and construed in accordance with, the laws of the State of California, without reference to conflict of laws.

Manual Conventions

This manual uses the following conventions:

Convention Description Example

Bold Menu, or drop-down menu selection FileExit (Click the File menu and click Exit)

Name of a dialog box or screen From the Connection screen...

Button or key commands Click Finish.

Mono User supplied text or variable Type guest, and click Enter.

Italic

Reference to another manual or help document Refer to the Topc o n Qu ic k Gu i de .

Further information to note about system configuration, maintenance, or setup.

Supplementary information that can have an adverse effect on system operation, system performance, data integrity, measurements, or personal safety.

Notification that an action has the potential to result in system damage, loss of data, loss of warranty, or personal injury.

SRL-35 Operator’s Manual P/N: 1003224-01

vii

Introduction

The SRL-35 is an IP67 classified UHF radio modem with a high power (35W) transmitter, wide 70 MHz tuning range (403...473 MHz) in one hardware and selectable channel spacing. The SRL-35 can offer radio speeds up to 19.2 kbps and has a selectable serial interface speed between 300 … 38 400 bps.

The SRL-35 includes a built-in LCD display, offering the user both new features and increased flexibility. No longer do you have to rely on access to a PC or terminal device to check or alter the configuration of the unit, now this can be achieved by viewing the LCD Display and using the four (4) push buttons. The display is also a useful tool in testing the radio connection between radio modems.

The SRL-35 facilitates the construction of large radio networks using the built-in Message Routing function, which is both fully transparent to the user and can be used with most system protocols.

The radio modem also offers option of error correction, utilizing the FEC method (Forward Error Correction). FEC can be used to minimize errors caused by noisy channels.

Introduction

Figure 1: SRL-35

•

High output power of up to 35Watt

•

Wide 70 MHz (403-473 MHz) operating range

•

User selectable channel spacing (12.5, 20 or 25 kHz)

•

Fully compatible with third party radio broadcast

•

Multi-function user interface to indicate current operating status and configure the radio modem

Automatic prevention of overheating

•

Industry standard IP-67 rating to withstand harsh surveying and construction environment

1. 25W limited output power version is available as an order option for geographical areas where regulatory restriction on output power applies.

SRL-35 Operator’s Manual P/N: 1003224-01

Components and Accessories

Table 1. Radio Modem

Part Number Description Notes

1002759-01 SRL-35 Radio Modem External 35W Radio Modem

Table 2. Power Accessories

Part Number Description Notes

1002448-01 CABLE,POWER(4) w/SAE & battery leads Radio Power Cable

14-008025-01 ALLIGATOR CLIPS TO SAE CABLE SAE to Battery Cable

Table 3. Communication Cables

Introduction

Part Number Description Notes

1002447-01 Programming cable (1A) - D9f / ODU8m 2 m (no switch) Radio Interface (Data/Programming) Cable

1002451-01 Cable 2 m, ODU 8-pin male / 7-pin male Radio to Topcon Receivers (GR-5, HiPer V)

Interface Cable

Table 4. Antenna Accessories

Part Number Description Notes

1002782-01 NMO-TNC ANTENNA MOUNT Antenna Mount

1002452-01 Antenex antenna 406-430 MHz 406-430 MHz External Radio Antenna

1002453-01 Antenex antenna 430-450 MHz 430-450 MHz External Radio Antenna

1002454-01 Antenex antenna 450-470 MHz 450-470 MHz External Radio Antenna

14-008012-01LF CBL,TNC-TNC/RG58 (3 meter) TNC-TNC 3 meter Cable

14-008012-06LF CBL,TNC-TNC/RG58 (5 meter) TNC-TNC 5 meter Cable

Table 5. Carrying Case

Part Number Description Notes

20-830301-02 Soft case for Radio modem and cables Soft Carrying Case

Please contact your local Topcon dealer to determine the standard kit available in your area and components included in the kit.

Components and Accessories

SRL-35 Operator’s Manual P/N: 1003224-01

Default Settings

The SRL-35 is shipped with the following default settings (unless otherwise specifically agreed):

DEFAULT VALUES OF THE ADJUSTABLE SETTINGS (user can change settings later on)

Setting Default value Range

Radio frequency

Operating TX frequency 438.000 MHz Range: 403 - 473 MHz

Operating RX frequency 438.000 MHz Range: 403 - 473 MHz

Reference Frequency 438.000 MHz Range: 403 - 473 MHz

Channel Spacing 12.5 kHz Range: 12.5, 20 or 25 kHz

Radio settings

TX Power 35 W Range: 10, 20, 25 and 35 W

Signal threshold -115 dBm -80 … -118 dBm

FCS OFF ON/OFF

Introduction

Table 6. Default Settings

TX-Start Delay 0 ms 0-65535 ms

Radio Compatibility SATEL 3AS SATELLINE-3AS, PCC 4-FSK, PCC GMSK, TrimTalk 450s

(P), TrimTalk450s (T), PCC-FST

Addressing

RX Address OFF ON/OFF

TX Address OFF ON/OFF

RX addressing to RS port OFF ON/OFF

TX address auto switch OFF ON/OFF

Serial port 1

Status ON ON/OFF

Interface RS-232 Fixed

Data speed 9600 bps 300, 600, 1200, 2400, 4800, 9600, 19200, 38400 bps

Data bits 8 7, 8, 9

Parity bits None None, Even, Odd

Stop bits 1 1, 2

Handshaking Handshaking lines apply to the DATA-port.

Default Settings

CTS Clear to send Clear to send, TX buffer state

CD RSSI threshold RSSI- threshold, Data on channel,

Always ON, External Antenna Control

RTS Ignored Ignored, Flow Control, Reception Control

Pause length 3 bytes 3 … 255 bytes

Additional setup

Error correction OFF ON/OFF

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Table 6. Default Settings

Error check OFF ON/OFF

Repeater OFF ON/OFF

SL-commands ON ON/OFF

Priority TX RX/TX

FullCR16 Check OFF ON/OFF

Routing OFF ON/OFF

Te st s OFF ON/OFF

The power cable (+Vb and GND) must be connected to a power supply with a proper output voltage (+9…+16

) and with a minimum output current of 15A.

Basic settings for the serial port of the host computer, when using a terminal program (TRU) to communicate with the SRL-35 radio modem, are as follows: “COM1, 9600 bps, 8-bit data, none parity, 1 stop bit”.

If the serial port designated as COM1 in the host computer is reserved, any other free serial port in the host computer can be used (with the settings listed).

Introduction

Terms “PCC”, “PacCrest”, and “PDL” are used interchangeably in this document as well as in common industry practice.

SRL-35 Special Features

Call Sign

The SRL-35 has a CALL SIGN identifier feature required in some countries. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise identity of a station.

A call sign is an FCC (in US) or other regulatory authority assigned identifier that is issued along with the license for operating a radio modem. This field is for entering your call sign. The modem automatically broadcasts the specified call sign periodically. If this field is empty, there is no call sign information.

Call sign can be transmitted using Topcon Receiver Utility (TRU). Advanced call sign setup can be found in Program menu clause Radio settings and further in its sub clause Call sign. Refer to the Settings chapter for detail on TRU and Program menu. Call sign has three (3) different setups. With Call Sign Mode you can set Morse code transmission ON or OFF. Call Sign ID defines which Morse code will be transmitted. Only capital letters and numbers are allowed. If the digits are wrong kind, there will be message: Value error. Small letters will be converted to capital letters automatically. If Call Sign ID field remains empty, the Call Sign transmission will not be activated. Call Sign Timer is the transmission delay of Morse codes. Minimum and default transmission time is 15 minutes.

During Call sign transmission the CTS-line of the modem is not in active state. This is to inform terminal equipment that the modem is not ready to neither receive data from serial port nor forward it. The modem deletes all data (also SL commands), which has arrived to serial port during call sign transmission. Call sign transmission lasts 1-4 seconds depending on the number of digits.

SRL-35 Special Features

SRL-35 Operator’s Manual P/N: 1003224-01

Temperature Protection of RF Power Amplifier

RF power amplifier is protected against overheating. The power of transmitter is lowered step by step if the inner temperature exceeds certain levels as shown below.

Table 7. Temperature

Temperature inside a modem Carrier power

Over 75°C 25 W

80°C 20 W

85°C 10 W

90°C 0 W (transmitter OFF)

When the ambient temperature is under 30°C and transmitter duty cycle does not exceed 40%, the temperature inside the modem does not exceed the trigger level.

The internal temperature is measured in the beginning of every transmission and at once when modem cools down. The carrier power increases with falling temperature so that at 88°C carrier power goes to 10W, at 83°C to 20W, at 78°C to 25W and at 73°C the modem operates again at the full 35W carrier power.

Introduction

Protection of Current

In case of a bad antenna impedance matching the current consumption of the Power Amplifier may be too high. For this reason the maximum current is limited to 12 A. If the current tends to increase over 12 A, the automatic power control decreases the power level until the current drops under 11.5 A. LCD indicates the actual power level of the transmitter. A new transmission starts always with the nominal power level. The power control scheme is applied only when the nominal power level is 35W.

SRL-35 Special Features

SRL-35 Operator’s Manual P/N: 1003224-01

Radio Interface

User Interface

Power Connector

Communication Interface

RF Connector

(Not Shown in Photo)

The SRL-35 radio has three interfaces; Communication, User, and RF, and the Power connection. The power connector on SRL-35 is a 4-pin mini style ODU connector. This chapter describes three interfaces available on the SRL-35 in detail.

Figure 2: Radio Interfaces

Serial Interface

The radio modem is referred to as DCE (Data Communication Equipment) whereas the PC is referred to as DTE (Data Terminal Equipment). The SRL-35 includes a 8-pin ODU which contains all the connections required to establish communication between the radio modem, acting as the DCE, and the PC, acting as the DTE.

All EMC requirements set forth by authorities have been taken into account in the design of the radio modem. The radio modem user is thereby not required to take any special actions regarding EMC-shielding (of the radio modem).

The radio modem has one serial port,

Table 8. 8-pin ODU Pinouts

Signal 8-pin ODU

RX 4

TX 5

CTS 2

RTS 1

GND 3

MODE 6

Port 1

which complies with the RS-232 standard.

Description of Pins:

Radio Interface



•

RX = Output of the data received from the radio modem to the DTE.

•

TX = Input of the data to be transmitted from the DTE to the radio modem.

•

CTS = C

lear To Send.

SRL-35 Operator’s Manual P/N: 1003224-01

•

RTS = R

•

MODE =

equest To Send.

operational mode. When the MODE-line is connected to ground (GND), the radio modem enters the Programming Mode, which is used to change the settings of the radio modem (i.e. configuration, set-up). If the MODE-line is not connected, the radio modem will enter the Data Transfer Mode, in which data can be transmitted and received. The Programming Mode is used only when installing a radio modem and changing the operational parameters of a network. Normally the radio modem is always in the Data Transfer Mode.

•

GND = both the negative pole of the operating voltage and the signal ground.

User Interface

LED Indicators

There are five (5) LED indicators on the front panel of the radio modem, and they give an indication of the status of the serial port and the radio interface.

LED Indication OFF Red Orange Green

RTS RTS-line status Inactive Active

Radio Interface

Table 9. Description of the LED-indicators

CTS CTS-line status Inactive Active

TX TX-line status No data Data Test TX a c tive

RX RX-line status No data Data

CD Radio status No signal Transmission Noise Reception

Display and Push Buttons

The SRL-35 includes a LCD Display with a backlight. In the Data Transfer Mode the display will show the operating settings of the radio modem, for example the radio field strength and the supply voltage. By using the push buttons and the LCD Display, it is possible to change most of the settings of the radio modem, without the need for an external terminal. The display backlight illuminates automatically as soon as a button is pressed.

The radio modem will shift into the Programming Mode by pressing the the menu shows a listing of the changeable parameters.

With the help of the main menu, sub-menus can be selected which in turn can be used to change the settings. You can always return to the previous higher level of the menu structure by pressing the (or BACK) push buon (●). Pressing the 5 or 6 buon changes sengs or moves in the menu. Selecons are confirmed by pressing the selected by pressing the

SELECT

button (see following page).

SET

button. In case of numerical values the digit to be changed is

SETUP

button (■). When activated

CANCEL

User Interface

SRL-35 LCD Display After Power-up

The display shows the basic information which is revolving automatically in 5 seconds.

SRL-35 Operator’s Manual P/N: 1003224-01

Display in Data Transfer Mode (transmit/receive mode)

Radio Interface

n-123 11.5V CH4 10W

462.37500/12.5

INFO SETUP

Info - Setup

By pressing the

INFO

buon (●) the modem goes to detailed informaon about the modem’s sengs.

SETUP

button (■) the modem goes to the programming menu.

Display in Info Mode

Pressing

Protocol PacCrest - 4FSK Exit 



shows the next window.

n-123: Field strength of last received transmission or noise level.

11.5V = Supply Voltage/Battery level indicator. CH4 = Current Channel 10W = Current Output Transmission Power

462.37500 = Operational TX/RX Frequency

12.5 = Channel Spacing

Protocol

Repeater OFF FEC OFF Port 1 9600/8N1 Exit 

RX Address RX1 OFF RX2 OFF Exit 

TX Address TX1 OFF TX2 OFF Exit 

Repeater FEC Port 1 : Port interface and status

RX Address

TX Address

User Interface

SRL-35 Operator’s Manual P/N: 1003224-01

Radio Interface

S/N XXXXXX FW XXXXXX Exit 

Board: SPL0005E +SLR-35 IM:05 Exit 

Display in Setup Mode

Serial Number FW: Firmware Version

Board: HW version

IM: Interface module type

RF Interface

The SRL-35 has a single TNC type RF-connector with impedance of 50 Ohm.

When the modem is supplied the frequency is set to “default channel”. The user can change the frequency afterwards by 70 MHz. Of course, all local regulations set forth by the authorities must be taken into consideration.

The data speed of the radio interface is set to “default speed”. It can also be set afterwards.

RF Interface

SRL-35 Operator’s Manual P/N: 1003224-01

A channel spacing of 25 kHz enables a data speed of 19200 bps and a channel spacing of 12.5 / 20 kHz enables, correspondingly, a data speed of 9600 bps. The data speed of the radio interface is always fixed (19200 bps or 9600 bps) irrespective of the data speed of the serial interface. If the data speeds of the radio interface and the serial interface differ from each other, the radio modem will buffer the data in transfer temporarily, so no data loss will occur.

Transmitter

The output power of the transmitter is adjustable. The greatest allowable power depends on limits set by local authorities, which should not be exceeded under any circumstances. The output power of the transmitter should be set to the smallest possible level, which still ensures error free connections under variable conditions. Large output power levels using short connection distances can, in the worst case, cause disturbances to the overall operation of the system.

Table 10. Typical output power levels

OUTPUT POWER dBm

10 W +40

20 W +43

Radio Interface

25 W +44

35 W +45,4

A product variant providing 25 W power levels is available by separate order.

Setting the radio data modem output power level to that which exceeds the regulations set forth by local authorities is strictly forbidden. The setting and/or using of nonapproved power levels may lead to prosecution. Topcon and its distributors are not responsible for any illegal use of its radio equipment, and are not responsible in any way of any claims or penalties arising from the operation of its radio equipment in ways contradictory to local regulations and/or requirements and/or laws.

Receiver

The sensitivity of the receiver depends on the channel spacing of the radio modem (=data speed of the radio interface) and on the mode of the FEC (error correction) according to the table below:

RF Interface

Table 11. Receiver Channel Spacing and FEC

Channel

spacing

25 kHz -108 dBm -111 dBm

20 kHz -111 dBm -114 dBm

12.5 kHz -111 dBm -114 dBm

FEC OFF FEC ON

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The Signal Threshold Level setting of the receiver determines a level, above which the search for the actual data transfer signal is active. It is recommended that values given in the table are used. If the Signal Threshold Level setting is set too low (the CD-LED is ON constantly), it is possible that the receiver is trying to synchronize itself with noise, in which case, the actual data transmission might remain unnoticed. Alternatively, weak data transmissions will be rejected, even though they would be otherwise acceptable.

Priority RX/TX

The SRL-35 offers a Priority setting, which selects the priority between reception and transmission. The setting can be changed in Programming Mode. By default, transmission has higher priority than reception i.e. the default value is Priority TX.

Priority TX means that a terminal device attached to a radio modem decides the timing of the transmission. The transmitter is immediately switched on when the terminal device starts to output data. Should reception be in progress, the radio modem will stop it and change to a transmit state. There is no need to use any handshaking for the control of timing.

Priority RX means that a radio modem tries to receive all data currently in the air. If a terminal outputs data to be transmitted (or an SL command) it will buffered. The radio modem will wait until the reception has stopped before transmitting the buffered data. This will result in timing slacks to the system, but decreases the number of collisions on the air; this is particularly useful in systems based on multiple random accesses.

Radio Interface

To t ogg le the Priority setting in the programming menu, select:

1) Priority RX / TX

If the Repeater Function has been set on, priority setting is automatically switched to RX mode.

Forward Error Correction

orward Error Correction, FEC-function is switched ON (or OFF) by using the Programming Mode. When activated, the FEC-function will cause the SRL-35 to automatically add additional error correction information, which increases the amount of transmitted data by 30%. It is used by the receiving radio modem to correct erroneous bits - as long as the ratio of correct and erroneous bits is reasonable.

Error correction improves the reliability of data transfer via the radio interface especially in unfavorable conditions. FEC-function should be used when link distances are long and/or if there are many disturbances in the radio channels used. The use of the FEC-function will, however decrease the data transfer throughput of data by about 30%. The list of exact delays when using FEC-function, are introduced in appendix B.

To switch the FEC-function ON in the Programming Mode, select:

1) Error correction ON

RF Interface

Error Checking

When the error checking is switched on, the radio modem will add a checksum to the transmitted data. When the data is received, the checksums are verified before data is forwarded to the serial port. There are two different options for error checking that can be accessed in the Additional Setup menu in Programming Mode:

SRL-35 Operator’s Manual P/N: 1003224-01

2) Error check

6) Full CRC16 check

Error check checks data partially while data is received.

Full CRC16 check function adds two checksum characters at the end of the user data message. At the

reception end the receiver receives first the whole package and if the checksum matches the data message is forwarded to the serial port. If Full CRC16 check is selected it must be set ON for all radio modems in the same network. Otherwise the checksum characters appear at the end of user message on the serial port.

User Data Whitening

In some cases, if the user data includes a large number of constant characters, additional bit errors may appear. The use of error correction (FEC) is recommended in such cases. If that is not possible, the Data whitening feature can be used to improve the reliability of data transfer. The feature is set on/off in the programming mode.

Radio Interface

RF Interface

SRL-35 Operator’s Manual P/N: 1003224-01

Transparent Data Transmission

Serial Interface, Data Format

The SRL-35 serial interface uses an asynchronous data format. No external synchronizing signal is needed, since necessary timing information is acquired from the start and stop bits transmitted before and after each data field bits (byte).

The data transfer speed of the serial interfaces can be set to 300, 600, 1200, 2400, 4800, 9600, 19200 or 38400 bps (bits per second). The length of the data field must be 7, 8 or 9 bits. When using a data field length of 7 or 8 bits, a parity bit may also be used.

Example:

corresponds to a binary value of ”11001100”) and with a start bit value of ”0”, parity bit set to either “NO” (NONE), ”0” or ”1” and with a stop bit value of ”1”, the possible combinations are listed in the table below:

If the settings of data speed, character length, parity or the number of stop bits differ between the radio modem and the terminal, errors will be introduced into the transferred data. The serial port settings of each individual radio modem in a system can all be different apart from the data length setting (7, 8 or 9 bits), which must always be the same in each individual radio data modem. In other words, the serial port used, the data transfer speed, parity and number of stop bits; can be different in different parts of a same system. The serial port settings can be changed in the Programming Mode.

Serial interface settings of the modem and terminal device connected to it must match.

With an 8-bit data character length and taking, for example, a decimal value of ”204”, (which

Handshake Lines

When using the RS-232 serial interface, handshake signals can be used to control data transfer. Handshake signals are used, for example, by the radio modem to inform the terminal that the radio channel is busy, and that it cannot initiate transmission. The terminal can also control the radio modem via RTS-line.

Table 12. Handshake Lines

Line Direction

CTS To term i n a l

RTS To mo d e m

CD To term i n a l

A common way of using handshaking signals is to monitor the CTS-line and ignore the others. Usually the terminal is fast enough to handle the data received by the radio modem, so the use of RTS-line is not necessary.

Handshaking is not needed if the system protocol is designed to prevent collisions (data contention) by the use of polling, or if there is little traffic and also if there is no harm from occasional data contention situations (several radio modems try to transmit at the same time).

Transparent Data Transmission

SRL-35 Operator’s Manual P/N: 1003224-01

CTS-line

The options for CTS-line are:

Transparent Data Transmission

1) Clear To Send

CTS will shift into inactive state during data reception and transmission.

2) TX buffer state

overflowing. This typically happens when the serial interface data transfer speed is greater than the radio interface transfer speed and the size of transmitted messages is large.

CTS is active when the radio modem is ready to accept data for new transmission.

CTS will shift into inactive state only if the radio modem’s TX buffer is in danger of

CD-line

The CD handshaking options are not supported by the SRL-35 modem.

The options for CD-line are:

1) RSSI-threshold

reception exists on the radio channel. It doesn’t make any difference if the signal is an actual data transmission, a signal of a radio transmitter not belonging to the system, or even an interference signal caused for example, by a computer or a peripheral device. CD is also active when the radio modem in question is transmitting.

2) Data on channel

CD will not react to interference signals.

CD is active whenever a signal with a level exceeding the level required for

CD will switch to active state only after recognition of a valid data transmission.

3) Always ON

which use the CD-line as an indicator of an active connection (the radio modem can transmit and receive at any time).

4) External Antenna Control

CD is always in the active state. This option can be used with terminal equipment,

RTS-line

The options for RTS-line are:

1) Ignored

2) Flow control

Non-active state of the RTS-line will force the radio modem to buffer the received data. This option is used if the terminal device is too slow to handle data received from the radio modem.

3) Reception control

enables reception (as normal). Non-active RTS-line will interrupt reception process immediately, even if the radio modem is receiving a data packet. This option is used to force the radio modem into WAIT State for an immediate channel change. Radio Protocol Support

RTS-line status is ignored.

The radio modem transmits data to the terminal device only when the RTS-line is active.

RTS-line controls the reception process of the radio modem. An active RTS-line

Serial Interface, Data Format

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Radio Protocol Support

The SRL-35 radio modem supports the following radio protocols for data transfer.

•

Satelline-3AS

•

PCC 4-FSK

•

PCC GMSK

•

TrimTalk450s(P)

•

TrimTalk450s(T)

•

PCC-FST

Transparent Data Transmission

Table 13. Radio Protocols

Protocol Modulation

Satelline-3AS 4-FSK 9600 19200

PCC 4-FSK 4-FSK 9600 19200

PCC GMSK GMSK 4800 9600

TrimTalk450s(P) GMSK 4800 9600

TrimTalk450s(T) GMSK 4800 9600

PCC-FST GMSK 9600 19200

a. Use of PDL and Satel protocols is recommended in applications where possible.

Compatibility with TrimTalk is subject to some restrictions.

Link rate

(@ 12.5 kHz)

Link rate

(@ 25 kHz)

The SRL-35 radio modem supports additional to the original SATEL 3AS data transfer also:

•

Pacific Crest compatible data transfer over the air, if the opponent Pacific Crest modems operate in the transparent mode/FEC ON/Scrambling ON that is the most common setup among RTK applications. The other modes are currently not supported.

•

TRIMTALK® 450s compatible data transfer over the air.

The SRL-35 radio modem provides the following radio compatibility settings:

•

So far, only the transparent mode is implemented, since it is the most commonly used and recommended by the user manuals. The ARQ based protocols with ACK/NACK schemes are not preferred in RTK applications that apply one-way communication.

Radio Protocol Support

Pacific Crest 4-FSK modulation, Transparent mode/FEC ON/Scrambling ON. Pacific Crest GMSK modulation, Transparent mode/FEC ON/Scrambling ON. TRIMTALK GMSK modulation, Transparent mode TrimTalk450s(T) = TrimTalk450s GMSK (RX fitted to Trimble transmitter) Pacific Crest-FST = Pacific Crest Transparent FST (4-FSK), FEC ON/Scrambling ON.

Refer to “Settings” on page 20 for setting the radio protocol.

SRL-35 Operator’s Manual P/N: 1003224-01

Timing and Delays During Data Transmission

When using a radio modem for data transmission, certain delays will be formed through the use of a radio interface and from the radio modem circuitry itself. These delays exist when the radio modem switches from Standby Mode to Data Transfer Mode and during reception and transmission of data. For detailed delay values in each case see Appendix B.

Data Buffering in the Radio Data Modem

Whenever the radio modem is in Data Transfer Mode it monitors both the radio channel and the serial interface. When the terminal device starts data transmission the radio modem switches to transmission mode. At the beginning of each transmission a synchronization signal is transmitted and this signal is detected by another radio modem, which then switches into receive mode. During the transmission of the synchronization signal the radio modem buffers data into its memory. Transmission ends when a pause is detected in the data sent by the terminal device, and after all buffered data has been transmitted. When the serial interface speed is the same or slower than the speed of the radio interface, the internal transmit buffer memory cannot overflow. However, when the serial interface speed exceeds the speed of the radio interface, data will eventually fill transmit buffer memory. In this instance, it will take a moment after the terminal device has stopped transmission of data for the radio modem to empty the buffer and before the transmitter switches off. The maximum size of transmit buffer memory is one kilobyte (1 kB). If the terminal device does not follow the status of the CTS-line and transmits too much data to the radio modem, the buffer will be emptied and the transmission is restarted.

Transparent Data Transmission

In the receive mode, the buffer works principally in the above described way thus evening out differences in data transfer speeds. If the terminal device transmits data to a radio modem in receive mode, the data will go into transmit buffer memory. If the modem is set to TX priority mode the transmission starts immediately as soon as data packet arrives to serial interface TD line.

Pause Length

The modem recognizes a pause on the serial line (a pause is defined as a time with no status changes on the RS-232 interface TX-line). The pause detection is used as criteria for:

•

End of radio transmission - When the transmit buffer is empty and a pause is detected, the modem stops the transmission and will then change the radio to the receive mode.

•

SL-command recognition - For a SL-command to be valid, a pause must be detected before the actual “SL…” character string.

•

User address recognition - In order for the start character to be detected, a pause must precede it in transmission.

Traditionally, in asynchronous data communication, pauses have been used to separate serial messages from each other. However, the use of non-real-time operating systems (frequently used on PC-type hardware) often adds random pauses, which may result in the user data splitting into two or more separate RF transmissions. This may cause problems especially in the systems including repeater stations.



Radio Protocol Support

SRL-35 Operator’s Manual P/N: 1003224-01

In order to match the operation of the radio modem to the user data, the Pause length parameter can be adjusted on the programming menu. It may have any value between 3 and 255 characters. The default value is 3 characters.

•

The absolute time of Pause length is depending on the serial port settings. For example, 1 character is ~1.04 ms at 9600 bps / 8N1 (10 bits).

•

The maximum absolute time is always 170 ms independent from the value of the Pause length given in the set-up.

•

An increase in the Pause length increases the round trip delay of the radio link correspondingly; this is due to the fact that the radio channel is occupied for the time of the Pause length after each transmission (the time it takes to detect a pause). If this is not acceptable, the TX delay setting may also be useful in special cases.

TX Delay

The radio modem can be configured to delay the beginning of a radio transmission by 1...65000ms. This function can be used to prevent packet contention in a system, where all substations would otherwise answer a poll of a base-station simultaneously. During this delay data sent to the radio modem is buffered. Although the priority setting is RX, radio modem is prevented to change over to receiving mode during the period of the TX delay. If this function is not needed, the delay time should be set to 0 ms.

Transparent Data Transmission

Testing

The radio modem can be switched to the Test M ode, where it will send a test packet on the radio channel. The test packet is a normal data transmission, which can be used, for example, when directing antennas during system installation.

When the test packet transmission has been switched on and saved by using the Programming Mode, the transmitting radio modem needs only a power supply and an antenna.

If the channel spacing of the radio modems is 25 kHz, it is recommended to use 38400 bps as a serial data speed of the receiving radio modem. In the case of 12.5 / 20 kHz channel spacing the data speed of 19200 bps is recommended.

Refer to “Changing Parameters Using a Terminal Device” on page 58 to enable test mode "ON" (Option 9) using a terminal program.

There are two Tes t Mod es :

Short Data Block Test

In this test mode the radio modem sends a short test string, which is preceded by a consecutive number, and it ends to the line feed character. The short data block is repeated continuously after 1 second break.

Short data block test is suitable for running data communication tests. Error-free reception of data can be monitored using a suitable terminal program (TRU).

Radio Protocol Support

SRL-35 Operator’s Manual P/N: 1003224-01

Example of a short data block:

00 This is a testline of SATELLINE-3AS radio modem

Long Data Block Test

Long data blocks consists of character strings, which are repeated without breaks for a fifty (50) second time period. After a ten (10) second break the test transmission is started again.

The Long block data test can be used for measuring TX output power, Standing Wave Ratio (SWR) of the antenna system or received signal strength at RX stations. Using the Long Block Test requires running the modem in radio compatibility mode SATELLINE-3AS.

Example of a long data block:

00 This is a long testline of SATELLINE-3AS radio modem

The strength of the received signal can be monitored using the LCD Display of the receiving radio modem.

Latency in PCC Transparent Mode

Transparent Data Transmission

In the PCC Transparent protocol mode (Option 1 and Option 2) the whole message is first read from the serial port and after that it will be framed and transmitted over the radio.

The end of the message is detected when there is a pause in data coming from the serial port.

The symbol rates for the Pacific Crest 4FSK (Option1) are:

•

19200 bps on 25 kHz channel

•

9600 bps on 12.5 kHz channel

The symbol rates for the Pacific Crest GMSK (Option2) are:

•

9600 bps on 25 kHz channel

•

4800 bps on 12.5 kHz channel

The actual raw data rate is approximately 2/3 of the symbol rate.

Transmission Delays using Pacific Crest 4FSK on 25 kHz channel

The table below presents the typical latency vs. the size of the message. The delays are measured from the end of transmitted data to the end of received data on the serial interface.

Table 14. Number of bytes sent

Bps 1 10 100 500

1200 77 ms 159 ms 971 ms 4590 ms

4800 48 ms 68 ms 317 ms 1438 ms

9600 43 ms 52 ms 209 ms 912 ms

19200 40 ms 45 ms 154 ms 650 ms

38400 39 ms 41 ms 127 ms 519 ms

Radio Protocol Support

SRL-35 Operator’s Manual P/N: 1003224-01

Transmission Delays using Pacific Crest GMSK on 25 kHz channel

The table below presents the typical latency vs. the size of the message. The delays are measured from the end of transmitted data to the end of received data on the serial interface.

Number of bytes sent

Table 15. Number of bytes sent

Bps 1 10 100 500

1200 86 ms 168 ms 1042 ms 4949 ms

4800 57 ms 77 ms 390 ms 1796 ms

9600 52 ms 62 ms 281 ms 1272 ms

19200 50 ms 55 ms 226 ms 1009 ms

38400 48 ms 51 ms 198 ms 878 ms

Transparent Data Transmission

Radio Protocol Support

SRL-35 Operator’s Manual P/N: 1003224-01

Settings

You can easily change the configuration of the SRL-35. By simply connecting MODE pin of the data connector to ground (GND) the radio modem switches into Programming Mode. Serial PORT 1 is used whenever the radio modem is in the Programming Mode. The serial port settings are 9600 bps, N, 8,1 (data transfer speed 9600 bps, none parity, character length 8 bits and one (1) stop bit).

The SRL-35 contains push buttons and a LCD Display, which can be used to modify configuration settings without the help of an external terminal device. The radio modem switches into Programming Mode by pressing the

Programming Mode

The settings of the SRL-35 are fully configurable in Programming Mode by using Topcon Receiver Utility (TRU) and the Data Cable

SETUP

button (■).

(NARS-ST for 8-pin connector).

In the Programming Mode, the radio modem is forced to use serial transfer speed 9600 bps, none parity, 8 data bits and 1 stop bit).

Changing Parameters using TRU

Topcon Receiver Utility (TRU) can be utilized to change parameters on the radio to configure it as per your job requirements. This section introduces basics of configuring the external SRL-35 radio using TRU. Refer to TRU reference manual for details on TRU application, available modes and details on the settings.

Connecting in Modem Managing Mode

1. Connect cables (RS-232 cable to PC COM-port, power supply cable to power supply).

2. Switch on the PC and run TRU on the PC.

3. In TRU, select Device  Application Mode and click on Modem Managing mode.

PORT1

, with settings 9600 bps, N, 8,1 (data

Settings

Figure 3: Select Modem Managing Mode

SRL-35 Operator’s Manual P/N: 1003224-01

4. Connect to Modem Manager: Device  Connect.

Make sure to uncheck Internal Modem under Receiver Port on the Connection Parameters screen.

Figure 4: Connect to Device

5. TRU automatically tries to connect to the SRL-35 radio by detecting default settings for serial

port.

Settings

Serial port parameters of the program as follows: 9600 bits/s, 8 data bits, none parity, 1 stop bit, (default in Programming Mode).

6. Once connected in Modem Managing mode, configure the radio modem by using the Settings

and Functions tabs.

Changing Parameters using TRU

SRL-35 Operator’s Manual P/N: 1003224-01

Configuring Radio in Modem Managing Mode

1. Select Device  Application Mode  Modem Managing mode  Settings.

2. To configure the radio, use the Settings tab in Modem Managing mode.

Settings

Figure 5: Modem Managing Mode Settings

Satel FEC ON/OFF has an effect to Satel-3AS protocol only. It is necessary to make sure that FEC is off for the radio to transmit correctly if using protocol other than Satel-3AS.

Changing Parameters using TRU

SRL-35 Operator’s Manual P/N: 1003224-01

Loading Frequencies/Channels

Settings

Channels/frequencies on the SRL-35 radio can be loaded using the

Functions

tab. You will need to inform your local dealer about licensed frequencies and dealer will supply you .mcf file (channel file for SRL-35 radio). Licensed frequencies are obtained by your local radio regulatory authority.

Once you have MCF file from your dealer, you can load the channel table in your radio using following steps.

1. Select the UploadMCFFile function.

2. Click on Value to select the .mcf file obtained from your local dealer.

3. Click on Execute to load the .mcf file on the radio. A Success message appears on the screen

when .mcf file loading completes.

Note for Dealers: The Advanced version of TRU is only available for dealers and enables creating MCF files for customers.

Changing Parameters using TRU

Figure 6: Functions Tab

SRL-35 Operator’s Manual P/N: 1003224-01

4. Use the Frequency Editing mode available in the advanced version of TRU. You are not required

to connect to the radio to create MCF file (or any other configuration file).

Settings

Figure 7: Choose Frequency Editing ModeClick the MCF Creator icon to create MCF Files for user distribution.

5. When MCF Creator dialog appears, click Add to add a frequency (along with channel number,

spacing, and max power).

Changing Parameters using TRU

Figure 8: MCF Creator Icon

SRL-35 Operator’s Manual P/N: 1003224-01

Settings

Figure 9: MCF Creator - Add

Maximum power is the power level in mW to the particular channel.

Changing Parameters using TRU

Figure 10: MCF Entry Dialogue Box

SRL-35 Operator’s Manual P/N: 1003224-01

6. To load another frequency/channel in the MCF file, click Add again and once completed with

adding the channels then click Save to save MCF file on your local drive. Once saved, dealer can send MCF file to their customers.

Settings

Figure 11: Save the MCF File

Changing Parameters using the LCD Display

The SRL-35 contains an LCD display that shows the valid functions and allows modification of the settings.

On standby mode the LCD display shortly displays the basic information. The following settings are shown: TX and RX frequencies, TX Power, and Channel Spacing.

The radio modems´ configuration settings can be done without the use of an external terminal device. This is especially convenient when modifying or re-installing radio modems in the field. The radio modem is switched into Programming Mode by pressing the

The main menu is used to select the desired submenus, and the modifications are performed using these submenus. It is possible to jump back at any time to the previous (higher) level in the menu hierarchy by just pressing the ”CANCEL” button (or in some cases the ”EXIT” button). Toggle-type parameters (typically with ON/OFF choices modifications have to be confirmed by pressing the ”SELECT” or ”SET” button. Press the “UP” or “DOWN” arrows to scroll up and down as well as to change screen within a particular submenu to set radio configuration parameters.

SETUP

button (■).

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

Settings

This is the display in Data Transfer Mode. Channel number is 4 TX Power is 10W TX/RX frequencies are 462.375 Channel spacing is 12.5 kHz Signal strength info is displayed on the upper left-hand corner:

n-123 11.5V CH4 10W

462.37500/12.5 INFO SETUP

- current noise level e.g. n-123

Battery level respectively on the upper right corner.

(■)

After pressing the SETUP button of modifiable parameters. Pressing the ▲▼ buttons the cursor moves upwards and

downwards. When the cursor > is placed beside the desired selection, entry into submenu is done by pressing the SELECT- button.

the display will show the main menu, which is a list

Select Channel Select Protocol Select Repeater (ON/OFF) Select FEC (ON/OFF)

▲▼ Select

EXIT

Changing Channel (Channel of the Active TX/RX Radio with Preset Frequencies)

Press ▲ or ▼ until the display panel and the cursor > points to “Select Channel” and press ”Select” to move onto the next submenu to change channel.

Select Channel > Ch4 10W

462.37500/12.5 EXIT ▲▼ SELECT

Press ▲ or ▼ until the desired channel is shown and press “SET” if the channel is to be modified. Press “CANCEL” if not modifying channel and return to previous menu.

If channel is modified press “YES” to save settings or “NO” to discard changes and return to previous menu.

Select Channel Ch4 10W 462375000/12.5 CANCEL ▲▼ SET

Save changes?

NO YES

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

Changing Protocol (Radio Protocol of the Active Radio)

Settings

Press ▲ or ▼ until the display panel and the cursor > points to “Select Protocol” and press ”Select” to move onto the next submenu to change protocol.

Press ▲ or ▼ until the desired protocol is selected and press “SET” if the protocol is to be modified. Press “CANCEL” if not modifying protocol and return to previous menu.

If protocol is modified press “YES” to save settings or “NO” to discard changes and return to previous menu.

Select > Protocol PacCrest - 4FSK EXIT ▲▼ Select

>SATELLINE-3AS PacCrest-4FSK PacCrest-GMSK TrimTalk 450S (P) TrimTalk 450s (T) PacCrest - FST CANCEL ▲▼ SET

Save changes?

NO YES

Select Repeater (Set SRL-35 to Act as a Repeater)

Press ▲ or ▼ until the display panel and the cursor > points to “Select Repeater” and press ”Select” to move onto the next submenu to turn repeater off or on.

Press ▲ or ▼ until the desired repeater setting is selected and press “SET” if the repeater setting is to be modified. Press “CANCEL” if not modifying repeater setting and return to previous menu.

SELECT > Repeater OFF EXIT ▲▼ SELECT

> Repeater OFF Repeater ON CANCEL ▲▼ SET

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

Select FEC

Settings

Press ▲ or ▼ until the display panel and the cursor > points to “Select FEC” and press ”Select” to move onto the next submenu to turn FEC off or on.

Press ▲ or ▼ until the desired FEC setting is selected and press “SET” if the FEC setting is to be modified. Press “CANCEL” if not modifying FEC setting and return to previous menu.

SELECT > FEC OFF EXIT ▲▼ Select

Satel FEC ON/OFF has an effect to Satel-3AS protocol only. It is necessary to make sure that FEC is off for the radio to transmit correctly if using protocol other than Satel-3AS.

Saving Parameter Setup Changes

> FEC OFF FEC ON CANCEL ▲▼ SET

To return to the Data Transfer Mode screen press “EXIT”.

If radio parameters are modified, press “YES” to write all changes to radio. Press “NO” to disregard changes and return to Data Tran sfer Mod e scr een.

Select Channel > Ch4 10W

462.37500/12.5 EXIT ▲▼ Select

Save changes?

NO YES

TrimTalk, and Pacific Crest Mode Settings

In order to use the Pacific Crest/TRIMTALK modes implemented in the SRL-35 modem:

PACIFIC CREST modems must have:

Protocol Mode =

•^: Transparent w/EOT Timeout (when using Pacific Crest modulations)

•^: TrimTalk 450s (when using TRIMTALK GMSK modulation)

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

•^: Transparent FST

•^: Modulation Type depends on the system

•^: GMSK (default, always selected when using TRIMTALK 450s mode)

•^: 4-Level-FSK

•^: FEC = ON (FEC OFF state supported in PCC Transparent FST protocol implementation)

•^: Scrambling = ON

•^: Data Security Code set to = 0 (=not used)

•^: Local Address= 0…254 (0 by default)

Pacific Crest modem receives messages from the SRL-35 modem that has its TX1 address matching the Local Address.

•^: Remote address=0…255 (255 by default, that is the broadcast address to be received by all).

The SRL-35 modem

receives the message from a Pacific Crest modem, provided its RX1 address matches the Remote Address of a Pacific Crest transmitter (or if the message has the broadcast address 255).

The SRL-35 modem must have the following key settings:

• FEC OFF (because the FEC here means SATEL 3AS FEC, not Pacific Crest/TRIMTALK FEC)

Settings

•Error check OFF

• Full CRC16 check OFF

• Radio Compatibility (according to selected Pacific Crest protocol mode setting)

– Pacific Crest 4-FSK

– Pacific Crest GMSK

– TRIMTALK GMSK, RX fitted to Pacific Crest transmitters

– TRIMTALK GMSK, RX fitted to Trimble transmitters

– PCC-FST

•Addressing:

• When TX address is selected ON, then TX1 address is used like PDL Remote address that is the destination address for the transmitted messages.

• Default value is 0x00FF (=255) (note the hexadecimal format of the setting)

• When RX Address is selected ON, then RX1 address is used like PDL Local address

• Default value is 0x0000 (=0) (note the hexadecimal format of the setting)

Addresses are NOT applicable in TRIMTALK 450s mode so the SRL-35 modem must have its RX/TX addresses OFF with Option3.

The configuration tools and settings are different between SRL-35 and Pacific Crest modems:

• Pacific Crest modems are configured via the serial port using PDLCONF Windows

modem.

Changing Parameters using the LCD Display

program that sends binary control messages to the serial port of the

SRL-35 Operator’s Manual P/N: 1003224-01

• The SRL-35 radio modem is configured via the serial port using TRU.

The table below shows the analogy of settings between Pacific Crest radio modems and the SRL-35 radio modem.

Table 16. PacCrest and SRL-35 Settings

Pacific Crest setting Corresponding SRL-35 setting

Identification: Owner (not implemented)

Identification: Channel Bandwidth Channel spacing

Identification: RF Power TX power

Radio Link: Channel Selection Type (Manual) Radio frequency

Radio Link: Current Channel Radio frequency

Radio Link: Link Rate The fixed link rates are:

Option 2 & 3: 9600bps@25kHz / 4800bps@12.5kHz

Option 1: 19200bps@12.5kHz / 9600bps@12.5kHz

Settings

Radio Link:Modulation Mode

Radio Link: Scrambling ON by default

Radio Link: Transmit Retries (not implemented)

Radio Link: TX ACK Timeout (not implemented)

Radio Link: CSMA Monitoring Priority (RX=ON, TX=OFF) Default: RX

Radio Link: AutoBase/AutoRover (not implemented)

Radio Link: Digisquelch Signal threshold

Radio Link: Forward Error Correction ON by default using Option 1, 2, 3

Radio Link: Local Address (0 by default) Primary RX address (RX1) (OFF by default)

Radio Link: Remote Address (255 by default) Primary TX address (TX1) (OFF by default)

Serial Interface:Protocol Mode Radio compatibility:

Compatibility Compatibility Compatibility

(Note: SRL-35 FEC must be OFF!)

Options 1 and 2 = Transparent w/EOT Timeout Option 3 = TRIMTALK 450s, RX fitted to PCC Option 4 = TRIMTALK 450s, RX fitted to Trimble Option 5 = PCC Transparent FST

PCC-4FSK PCC-GMSK TRIMTALK GMSK

Serial Interface: BREAK to Command (not implemented)

Serial Interface: Modem Enable: Yes (not applicable)

Serial Interface: Soft Break Enable (not implemented)

Serial Interface: EOT value (in 0.01s units) Pause length (in serial port byte intervals)

Serial Interface: Digipeater Delay(in0.01s units) (not implemented)

Serial Interface: Local Node Repeater (not implemented)

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

Table 16. PacCrest and SRL-35 Settings

Frequency Table Radio frequency

Data Security Code (must be 0=not used) (not implemented)

Potential conflicts:

- Error check and Full CRC16 check must be OFF in SRL-35 modem

- SRL-35 RX/TX addressing does not use ARQ scheme like Pacific Crest radios.

Settings

Changing Parameters using the LCD Display

SRL-35 Operator’s Manual P/N: 1003224-01

Installation

Check List

The following points must be taken into account when installing and configuring a radio modem:

 All operating voltages of all the equipment concerned must always be switched OFF before connecting the

serial interface cable.

 When considering the exact placement of a radio modem and/or its antenna, the following points must be

taken into account to guarantee optimal results:

•

The antenna should be installed in open space as far as possible from any possible sources of interference

•

The radio modem should not be installed onto a strongly vibrating surface

•

The radio modem should be installed in such a way as to minimize exposure to direct sunlight.

 To ensure reliable operation the voltage output of the power supply used must be stable enough and the

current capability of the power supply must be sufficient.

 The antenna must be installed according to instructions.

 Serial interface settings between the radio modem and the terminal unit must correspond to each other.

 All radio modems in the same system must be configured using equal radio settings (radio frequency, channel

spacing, compatibility, forward error correction and data field length).

Installation of a Radio Data Modem

The radio modem should be installed with the installation accessories supplied with the radio modem.

RS-232 Wiring

Refer to “Data Connector” on page 47.

In the SRL-35, the voltage is limited to 16V.

Fuse

A proper fuse must be connected in between the radio modem and the power supply. The correct value is 15A for the SRL-35.

Installation

SRL-35 Operator’s Manual P/N: 1003224-01

Power Supply

The allowed operating voltage is +9 ... +16 VDC. The radio modem must only be connected to a power supply with an adequate current output (power rating minimum is 150W). The pins 1 and 2 of the 4pin Odu-connector are connected to the positive power supply line. The pins 3 and 4 are connected to negative power supply line (ground).

Antenna Installation

Because of the great transmission power of the SRL-35 radio modem, only an external antenna is allowed. A whip-antenna directly connected to the antenna connector must not be used.

Mobile Equipment

•

¼-wave antenna

•

½-wave antenna

The ideal installation position is vertical, and there should be at least 0.5 m of free space around the antenna. In small systems a ¼-wave antenna is sufficient. A separate ground plane should be placed under the antenna (vehicle rooftop or the engine hood or trunk door are usually suitable). In problematic cases the most suitable type is a ½-wave antenna. It can be installed directly at the top of a pipe with the added benefit of gaining as much as free space around the antenna as possible. In cases, which the antenna cannot be directly connected to the TNC-connector of the radio modem, a coaxial cable with 50 ohm impedance must be used between the antenna and the TNC-connector.

Installation

Base Stations

•

Omni-directional antennas ( ¼- , ½- or 5/8-wave antenna)

•

Directional antennas (yagi /multi-element antenna or corner antenna)

The antenna should be installed in a vertical position. The exact location of the antenna depends on several factors, such as the size of the overall system and the coverage area terrain contours. A rule of thumb is that the base station antenna should be located at the highest point of the coverage area and as close to the center of the coverage area as possible. The base station antenna can also be located inside a building, if the walls of the building do not contain metal.

General Antenna Installation Instructions

The reliability and the achievable coverage of useful signal strength can be severely affected by the positioning of the antenna. Antenna and cable connectors should have gold-plated pins and sockets, as use of low quality connectors can lead to eventual oxidation of the connector surfaces, which in turn may degrade the contact and cause additional attenuation. Good quality tools and materials must be used when installing radio modems, antennas and cables. The weather tolerance of the materials used must also be taken into account. Installed materials must withstand all foreseeable weather conditions (frost, excess sun, direct UV-radiation, seawater etc.). Also possible environmental pollution must be considered (acids, ozone etc.).

Antenna Installation

SRL-35 Operator’s Manual P/N: 1003224-01

Antennas must be installed well away from metallic objects. In the case of small antennas this distance should be at least ½ m. With large antennas the distance should be >5 m and in case of repeater antenna combinations >10 m.

If the system contains a large number of radio modems, the best location for an antenna is the highest point of a building and possibly an additional antenna mast. If a separate antenna mast is used, the antenna can, if necessary, be installed sideways about 2…3 m from the mast itself.

When installing an antenna possible interference sources must be considered. Such interference sources are, for example:

•

mobile telephone network base station antennas

•

public telephone network base station antennas

•

television broadcast antennas

•

radio relay antennas

•

other radio modem systems

•

PC-related devices (approximately 5 m radius from antenna)

When ordering antennas we request you to note that antennas are always tuned to a specific frequency range. Simple antennas and antennas, which have been constructed of stacked yagi-antennas, are typically rather broadband. As the number of yagi-elements increases the frequency range becomes narrower. Note this specially with 35W.

Installation

When designing and installing a system it is advisable to prepare to test the system, and also to consider serviceability of the system. In particular cabling should be planned to allow easy access and to allow for maintenance. It is often practical to use long antenna cables, so that the radio modem can be installed far enough from the antenna itself to a location that is easily accessible (see section 10).

The type of the antenna cable is dependent on the length of the antenna cable, and the following table can be used to select a suitable type:

Table 17. Antenna Cables

Length Type Attenuation 10m/450MHz

<5m RG58 3.0dB

0…20m RG213 1.6dB

>20m ECOFLEX10 0.9dB

>20m AIRCOM+

>20m ECOFLEX15 0.6dB

a. AIRCOM+ cable is partially air insulated, so the use of this cable requires that the

connection between the cable and the connectors are fully airtight.

0.8dB

If there is a line-of-sight path between the antennas a 6 dB power marginal is usually adequate. However, if the connection is built on the reflection and/or the knife-edge diffraction the path loss can vary even 20 dB depending on the weather conditions. In this case a short test can give a too positive result of the quality of the connection. Thus the height of the antennas and topographical obstacles must be surveyed with great care. From time to time a marginal connection can be used if the data transmission protocol is well prepared for this and the data transmission that occasionally slows down does not cause any problems to the system.

Vertical polarized antennas (antenna elements are in vertical position) are often used in radio systems. In a system between a base station and substations vertical polarization is recommended. The radio modem antenna cannot be mounted on the same level as the other substation antennas in the same building. The

Antenna Installation

SRL-35 Operator’s Manual P/N: 1003224-01

best way to distinguish from the other antennas situated in the neighborhood is to mount the antennas as far as possible from each other on the altitude level. The best result is generally obtained when all the antennas are in the same mast. With an extra ground plane between the antennas more distinction can be obtained between the antennas in the mast.

Horizontal polarization can be used in data transmission between two points. With the polarization attenuation more distinction is obtained to vertical polarized systems. The influence of the directional patterns of the antennas must, however, be taken into consideration. If a distinction to another interfering antenna is wanted with the horizontal polarized antennas there must be a good attenuation of the back lobe. In addition to this the interfering radiator should be situated behind the antenna.

When a system does not demand the use of an omni-directional antenna it is recommended that directional antennas are used e.g. two-element yagis in permanent external installations. Please note that as antenna amplification increases the setting of the direction of the antenna requires more attention.

Base stations in high places should be supplied with high-Q cavity filters. Please note that the higher the base station antenna, the larger the coverage area and in turn that the risk of interference is also increased.

Topcon recommends the use of a band-pass filter with a large Q in the antenna cable of the base station.

By using amplifying antennas (G=Gain) and by installing the antenna high, long connection distances can be realized using the SRL-35 radio modem.

Installation

Factors Affecting the Quality and Distance of the Radio Connection

•

power of the radio transmitter

•

sensitivity of the radio receiver

•

tolerance of spurious radiation’s of the radio modulating signal

•

amplification of transmitting and receiving antennas

•

antenna cable attenuation

•

antenna height

•

natural obstacles

•

interference caused by other electrical equipment

The transmitter power of the SRL-35 is 35 W (maximum) and the sensitivity of the receiver better than 114 dBm. Thus in a flat area and in free space with a 1/4 wave antenna (antenna amplification 1dBi) and antenna height of 1 m communication distances of 3 to 4 km can be achieved. Distances may be considerably shorter in situations where there are metallic walls or other material inhibiting the propagation of radio waves.

Over long distances, increasing the height of antennas can often solve problems caused by natural obstacles. A ten-fold increase in distance can be achieved with the use of amplifying antennas. Frequent topographical variations over long distances may require that at least one of the antennas be raised to a height of 10 to 20 m.

If the antenna cable is more than 10 meters long it is necessary to use a low loss cable (< 0.7 dB /10 m) in order not to waste the antenna amplification. Adding a repeater station can also solve problematical radio connections. In systems with many base stations the RSSI-signal can be used to assist in choosing the base station with the best signal. A communications network can also be built with a combination of cables and radio data modems.

Factors Affecting the Quality and Distance of the Radio Connection

SRL-35 Operator’s Manual P/N: 1003224-01

The SRL-35 operates in the 450 MHz band, where man made interference is insignificant. Long distance interference needs not to be taken into account even in special weather conditions.

The SRL-35 tolerates normal levels of interference that occur. However, exceptionally high levels of interference can break through the safeguards and thus cause errors in data transfer. In mobile vehicle applications the range of operation can be increased by dividing the transmitted data into e.g. 50...500 byte long blocks and by re-transmitting the defected blocks.

A sufficient safety margin can be obtained by testing the communication path using extra 6 dB attenuation at the antenna connection and with slightly less effective antennas than those to be used in the final system.

Radio Field Strength

Radio signal strength must be good enough for successful data transfer. Where field strength is above a certain level, the operational results are very good. Below this level, a few dB marginal areas occur in which errors begin to be generated by noise and interference that will eventually lead to loss of connection.

The field strength is at its optimum level in open space, although increasing distance will still reduce it. It must also be remembered that one open space has different environmental and external factors to another, and that the effects on transmission quality must be taken into account when planning the system.

Installation

Ground, ground contours and buildings cause attenuation (loss of energy through absorption) and reflection of radio waves. Buildings reflect radio waves and therefore the affects of attenuation are not as acute when transmission is over a short distance.

However, the reflected waves will often be a bit delayed, and when they combine with the direct radio waves they interact in either a weakening or a strengthening way. This causes the fading effect in mobile systems. In reality very sharp signal drops spaced about 35 cm apart may occur. The attenuation may even reach 40 dB, normally less.

Factors Affecting the Quality and Distance of the Radio Connection

SRL-35 Operator’s Manual P/N: 1003224-01

Repeater Mode and Addressing

Repeaters and addressing may be used to extend the coverage area of a radio modem network, and to direct messages to selected radio modems in the network. In large systems, with several repeaters and formed repeater chains, it is often practical to use routing instead of plain addresses.

Repeater

In circumstances where it is necessary to extend the coverage area of a radio modem network, the SRL-35 can be used as a repeater station.

The maximum size of a repeated data packet is 1kB (kilobyte). The Repeater Function is switched on using the Programming Mode. In the repeater mode the radio modem will function as a totally independent unit, which means that only a power supply and a suitable antenna are needed. Other devices are not necessary.

A radio modem acting as a repeater can also be used to receive and transmit data. In repeater mode the radio modem will transmit the received data to the serial interface in a normal fashion. The difference being that the received data will be buffered into the buffer memory. After reception the radio modem will re-transmit the buffered data using the same radio channel as in reception. Data received through the serial interface a radio modem in repeater mode will transmit normally.

The same network may include several repeaters, which operate under the same base station. Repeaters may also be chained; in which case a message is transmitted through several repeaters. In systems with more than one serially or parallelly chained repeater, addressing or routing protocol must be used to prevent a message ending up in a loop formed by repeaters, and to ensure that the message finally reaches only the intended radio modem.

The implemented Pacific Crest/TRIMTALK modes support also the repeater function. The repeater function is configured either by using the SL commands:

SL@M=R

SL@M=O

or by selecting

Repeater Mode and Addressing

(Repeater ON)

(Repeater OFF)

Repeater OFF/ON

Figure 12: Repeater

from the SRL-35 display menu.

SRL-35 Operator’s Manual P/N: 1003224-01

The repeater modem passes TRIMTALK messages also to its serial port unlike for example Pacific Crest PDL modems.

If error correction is ON (FEC ON) and TRIMTALK mode is activated by using ”SL@S=3” command, the firmware automatically switches SATEL FEC OFF temporarily, and turns it back at the mode return.

Addressing

Addresses can be used to route a data message to the desired destination or to separate two parallel networks from each other. In networks with repeaters it is usually necessary to use addresses to prevent data messages from ending up in loops formed by repeaters.

The SRL-35 allows the use of individual addresses both for reception and transmission. Addresses can be switched on separately, or simultaneously, in both data transfer directions.

Repeater Mode and Addressing

The radio modem contains two transmission and two reception addresses, which are knows as the primary address and secondary address. The primary address is used whenever data from the serial interface is transmitted. At the receiving end, the radio modem will receive using either of the two receive addresses.

Secondary transmit address is only used in repeater applications.

Radio modems configured to function as repeaters, will repeat data messages using either the primary or secondary address, depending upon which address was used during the reception of the data message.

If only one address pair is needed in a network, both addresses must be set the same



(TX1 = TX2 and RX1 = RX2).

It is also possible to transfer the received address onto the serial interface.

The address is composed of two characters totaling 16 bits, resulting in over 65,000 different address combinations. The address is attached to the beginning of each data packet sent by the radio modem. When a radio modem receives a data packet whilst using addressing mode, the radio modem will check the first two characters of each received data packet to ensure that the packet in question was intended for the correct radio modem.

ADD H ADD L DATA

Address may be selected between 0000h…FFFFh (h = hexadecimal, corresponding decimal numbers are 0-

65535).

Addressing

Example:

address 1234h (4660 in decimal format), where 12h is ADD H and 34h is ADD L.

address ABFFh (44031 in decimal format), where ABh is ADD H and FFh is ADD L.

SRL-35 Operator’s Manual P/N: 1003224-01

Transmission:

Address

Address Address

Repeater Mode and Addressing

Transmission address has been set OFF. Radio modem will transmit the data packet as such.

Reception:

Reception addressing has been set ON and either the primary or secondary RX address of the radio modem is identical to the address of the received data packet.

Transmission addressing has been set ON. The radio modem will add the primary TX address to the beginning of the data packet.

Reception addressing has been set ON, but both the primary and secondary RX addresses of the radio modem are different from the address of the received data packet.

Addressing

The radio modem will remove the address and send the actual data to the RS-232 interface.

However, if the ”RX Address to RX-line” setting is on, the radio modem does not remove the address.

SRL-35 Operator’s Manual P/N: 1003224-01

Data does not appear on the RS-232 interface.

Repeater Mode and Addressing

Address

ERROR

Reception addressing has been set OFF.

Reception addressing has been set ON but there is no address in the data packet.

The radio modem will transfer all received data to the RS-232 interface.

The radio modem will consider the characters of the address as a part of the data and will send all the characters to the RS-232 interface.

Data will appear on the RS-232 interface ONLY if the first 2 characters of the data match either of its own RX address. The radio modem will remove those 2 characters of data.

Connection Between Two Points

When forming a connection between two points it is recommended that both the reception and transmission addresses are identical in both radio modems. This is the easiest way to control addresses and the risk caused by interference from other systems operating in the same area is minimal.

Example:

messages which contain this address, and they will use this same value when transmitting data.

If the channel is reserved for use only by the said network, or if the terminal devices are responsible for addressing, it is not necessary to use addressing in the radio modems.

by setting all addresses of both radio modems to a value ´1234´, they will accept only those

System of One Base Station and Several Substations

In systems with several substations, the base station must know to which substation each message is intended, and from which substation each received message originates. Usually terminal devices handle addressing completely, but it is also possible to use the addressing functionality of the radio modems.

For example, if the substation terminal devices are not able to check and form addresses by themselves, addressing may be achieved with the help of the addresses of the radio modems attached to these terminal

Addressing

devices. The base station may, in such a case, define the destination of a message by adding the address of the corresponding radio modem into the beginning of the data packet. The substation radio modem(s) will check the address and the corresponding radio modem will identify and remove the address characters. In a similar way, the substation will add when transmitting to the base station its address characters into the

SRL-35 Operator’s Manual P/N: 1003224-01

beginning of the data packet, thus defining the origin of the sent data packet. In the base station radio modem, addresses have been switched OFF, so that they are transmitted as is to the base station terminal device for further processing.

Using Repeaters and Addresses in the Same System

In systems with several repeaters, a substation and a base-station, addresses must be used in radio modems. It is possible to also realize a system with only one repeater without addressing. In such a case, the base station will however hear the message both from the substation and from the repeater, in other words the message is duplicated as it moves along the route.

There are at least two ways of realizing such a system depending on the capabilities of the terminal devices in question and on the number of repeaters to be used and on their relative positions to each other.

System with Several Repeaters

In systems with several serial or parallel-chained repeaters, addressing must be used to prevent messages from ending up in loops otherwise formed by repeaters, and to ensure that only the desired (addressed) radio modem receives the data intended for it.

Repeater Mode and Addressing

All radio modems in the network must be set to a state, in which the RX addressing is switched ON and TXaddressing is switched OFF. Base-station and all substations add an address string in the beginning of the data to be transmitted.

In the relaying of the message addressing is used in the following way:

R1 ADD R2 ADD S ADD DATA

The above is the data received from the base station terminal device, containing repeater addresses (R1 ADD, R2 ADD) and the substation address (S ADD). Two characters define each address.

R2 ADD S ADD DATA

The above is the same message after being relayed from repeater 1 to repeater 2.

S ADD DATA

The above is the same message after being relayed from the last repeater in the chain (repeater 2) to the substation.

DATA

The above is the same message being relayed via the serial interface of the substation radio modem to the terminal device.

In a situation where the substation transmits data towards the base-station the address is formed in a similar way, but the order of the addresses is reversed:

R2 ADD R1 ADD M ADD DATA

In the above, R2 ADD is address of repeater 2, R1 ADD is address of repeater 1 and M ADD is the address of the base-station.

Using Repeaters and Addresses in the Same System

SRL-35 Operator’s Manual P/N: 1003224-01

Repeater Chain Using Address Pairs

In a situation where the terminal devices and substations cannot form address fields, but are able to recognize messages addressed to them, alternating address pairs may be used. Transmit address (TX) and receive address (RX) alternate in the order shown in the table below.

Table 18. Address Pairs

Repeater Mode and Addressing

Address type Base-station address

TX address Address 1 Address 2 Address 1

RX address Address 2 Address 1 Address 2

Repeater 1 and the addresses of

the substations of the base-station

Repeater 1 substations

addresses

In a network where alternating addresses are utilized, the exact route that is used to relay a message to a certain radio modem is fixed at the time of installation and configuring the system. The order of the addresses must be the same as the order of the route that is used to relay the message to the said radio modem. It should be noted however, that in network where alternating addresses are used the basestation and substations will hear their own messages repeated.

Repeater Chain using Dual Addressing

If the terminal devices cannot add address chains to the beginning of the data packets, a network with several repeaters may still be realized by using dual addressing. In dual addressing each link (see arrows below in figure) is given a unique address, which will prevent duplication of messages and endless loops in the network. The terminal devices need not add anything to the data.

Usually the primary transmit address is used in transmission (TX1). The secondary transmit address (TX2) is used only if the Repeater Mode is used and the packet to be repeated was received using the secondary reception address (RX2).

In the following example two repeaters are used. It should be noted that each link (arrow) might be uniquely defined with the help of radio modem numbers and data transfer directions. The Repeater Mode should be switch ed O N only in th e radi o modems act ing as repeaters to prevent the packets from remaining in endless loops in the network.

Repeaters may also act as ordinary substations; in that case the terminal device must wait until the message has reached the end of the repeater chain before sending data.

Figure 13: Repeater Chain Using Dual Addressing

Using Repeaters and Addresses in the Same System

SRL-35 Operator’s Manual P/N: 1003224-01

Redundant Repeater Chain

Reliability of a radio data communication system can be improved significantly by designing redundant equipment setup for master and repeater stations. The two repeater chains are separated by proper dual addressing setup. Slave stations need to be able to communicate with the master through the both repeater chains. By using the "TX address auto switch" function, the slave station modem directs the reply message to the repeater chain from which the request has been received.

If "TX address auto switch" has been set ON, radio modem checks out the RX address of the received message. When one of the RX addresses is recognized, all the messages coming in from the serial interface will be sent to the air with matching TX address. The use of "TX address auto switch" function is not recommended if Repeater Function is set ON.

Local/Remote Address Compatibility with PDL Modems

If the modem has TX address ON, then primary TX address is handled in the same way as Remote address in Pacific Crest PDL modems. The default value is 0x00FF (255 in decimal format) i.e. the broadcast address.

If the modem has RX address ON then primary RX address is handled in the same way as PDL Local address in Pacific Crest PDL modems. The default value is 0x0000 (0 in decimal format).

Repeater Mode and Addressing

SRL-35 modem needs to have TX Delay 50ms or more in order to avoid messages from colliding in case it is to be placed in a Pacific Crest system that uses addressing and acknowledging scheme.

Note 1. SRL-35 modems do not support Pacific Crest retransmit/acknowledge scheme. However, that has no effect in RTK applications because they utilize only broadcast messages.

Using Repeaters and Addresses in the Same System

SRL-35 Operator’s Manual P/N: 1003224-01

Specifications

DC input ranges Nominal voltage: +9...+16 VDC

Tem p e r a tu r e Ra n g e s -25 °C...+55 °C

Antenna Connector TNC, 50 Ohm, female

Construction Aluminum housing

Size L x W x T 189 x 138 x 71 mm (with connectors)

Weight 1420g

IP Classification IP67 (NEMA 6)

Table 19. General Specifications

GENERAL

(4-pin ODU MINI-Snap Size 1)

-40 °C...+75 °C (absolute min / max): Functional

-40 °C... +85°C (Storage)

Table 20. Technical Specifications

RECEIVER TRANSMITTER

Frequency Range 403...473 MHz

Tuning Range 70 MHz

Channel Spacing 12.5 kHz / 20 kHz / 25 kHz (Programmable)

Spurious Radiations < 2 nW According to EN 55022 and FCC CFR47 part 90

Duty Cycle 35W a)

Duty Cycle 10W a)

Frequency Error Tolerance < 1 kHz

Sensitivity -114 dBm @ 12.5 kHz

Co-channel Rejection >-12 dB

100% (@22°C) 20 min 100% (@35 °C) 13 min 40% No limit

100% (@22°C) No limit 100% (@35 °C) 50 min 40% No limit

-111 dBm @ 25 kHz (BER < 10 E-3)

Adjacent Channel Selectivity

Selectivity 67 dB @ ±50 kHz

Intermodulation Attenuation

Blocking > 86 dB

Spurious Rejection > 60 dB

Specifications

> 47 dB @12.5 kHz > 52 dB @ 25 kHz

> 60 dB

SRL-35 Operator’s Manual P/N: 1003224-01

Table 20. Technical Specifications

Power Consumption < 1.8 W 120 W typical @ 35 W, min 12 Vdc

100 W typical @ 25W

Specifications

Power Save Mode

SLEEP State:0,4 W typical

Consumption

Communication Mode Half-Duplex

Type of Emission F1D

Carrier power

10, 20, 25, 35 W / 50 ohm (default)

5, 10, 20, 25W / 50 ohm (Option

)

Adjacent Channel Power According to EN 55022 and FCC CFR47 part 90

Carrier power stability + 2 dB / - 3 dB

a. If high output power is used continuously or with a high cycle, the equipment generates excess heat. The output power is automatically decreased when necessary to prevent overheating. Typical operating times are shown in the chart with different output powers and duty cycles @ 22°C and 35 °C (see chapter 3.2).

b. Limited output power is available as on order option.

Note 1 Due to radio electronic design, the receiver is about 6 – 15 dB less sensitive on the following frequencies:

403.000, 416.000, 429.000, 442.000, 455.000, 468.000, 409.5875 and 469.200 MHz.

Table 21. Data Modem Specifications

DATA MODEM

Tim in g RS-232

Electrical Interface RS-232

Interface Connector 8-pin ODU

Data speed of

300 – 38400 bps

I/O-interface

Data speed of Radio Interface

19200 bps (25 kHz channel) / 9600 bps (12.5 / 20 kHz channel)

Data Formats Asynchronous RS-232

Table 22. Radio Protocols

Protocol Modulation

Link rate

(@ 12.5 kHz)

Satelline-3AS 4-FSK 9600 19200

PCC 4-FSK 4-FSK 9600 19200

PCC GMSK GMSK 4800 9600

TrimTalk450s(P) GMSK 4800 9600

TrimTalk450s(T) GMSK 4800 9600

Link rate

(@ 25 kHz)

PCC-FST GMSK 9600 19200

a. Use of PDL and Satel protocols is recommended in applications where possible. Compatibility with TrimTalk is subject to

some restrictions.

SRL-35 Operator’s Manual P/N: 1003224-01

OTHER MEASUREMENTS

ESD-failure threshold 8 kV contact, 15 kV air discharge

Immunity test 10V/m

Connectors

The device contains a data, power and antenna connector.

Data Connector

The device adopts a high standard waterproof ODU 8-pin data connector.

•

DTE is an abbreviation for Data Terminal Equipment

•

I/O column below denotes the direction of the signal

•

“IN” is from DTE to the radio modem, “OUT” is from the radio modem to DTE

Specifications

Table 23. Measurements

Connectors

Table 24. Data Connector

PIN NAME I/O LEVEL EXPLANATION

1 RTS IN RS-232 Request To Send from DTE

2 CTS OUT RS-232 Clear To Send. This signal indicates that the radio modem's serial interface is

ready to receive data from DTE.

3 SGND - - Signal ground

4 RX OUT RS-232 Receive Data to DTE from the radio modem

5 TX IN RS-232 Transmit Data from DTE to the radio modem

6 MODE

(DATA/PROG)

7 Not connected

8 Not connected

a. Programming Mode is for changing the settings of the radio modem via Programming menu. Normally the MODE line is NOT connected

i.e. the radio modem is in Data Transfer Mode.

IN0 - 1 6 V <1VDC or connected to ground = Programming Mode

>3VDC or Not connected = Data Transfer Mode Note

SRL-35 Operator’s Manual P/N: 1003224-01

Power Connector

The power connector is a 4-pin ODU MINI-SNAP Style G4 size 1.

Table 25. Power Connector

PIN NAME EXPLANATION

Specifications

1 PWR (+)

2 PWR (+)

3 GND Ground Note***

4 GND Ground Note***

a. Both PWR pins 1&2 must be connected! b. Both GND and pins 3&4 must be connected!

Operation Voltage +9 … +16 VDC Notes

Operation Voltage +9 … +16 VDC Note

Antenna Connector

The antenna connector is a 50 Ohm TNC Female.

Connectors

SRL-35 Operator’s Manual P/N: 1003224-01

Warranty and Safety Instructions

Warranty

Topcon laser and electronic positioning equipment are guaranteed against defective material and workmanship under normal use and application consistent with this Manual. The equipment is guaranteed for the period indicated, on the warranty card accompanying the product, starting from the date that the product is sold to the original purchaser by Topcon’s Authorized Dealers.

During the warranty period, Topcon will, at its option, repair or replace this product at no additional charge. Repair parts and replacement products will be furnished on an exchange basis and will be either reconditioned or new. This limited warranty does not include service to repair damage to the product resulting from an accident, disaster, misuses, abuse or modification of the product.

Warranty service may be obtained from an authorized Topcon warranty service dealer. If this product is delivered by mail, purchaser agrees to insure the product or assume the risk of loss or damage in transit, to prepay shipping charges to the warranty service location and to use the original shipping container or equivalent. A letter should accompany the package furnishing a description of the problem and/or defect.

The purchaser’s sole remedy shall be replacement as provided above. In no event shall Topcon be liable for any damages or other claim including any claim for lost profits, lost savings or other incidental or consequential damages arising out of the use of, or inability to use, the product.

Safety Warnings

THIS PRODUCT HAS NOT BEEN DESIGNED, INTENDED NOR INSPECTED TO BE USED IN ANY LIFE SUPPORT RELATED DEVICE OR SYSTEM RELATED FUNCTION NOR AS A PART OF ANY OTHER CRITICAL SYSTEM AND IS GRANTED NO FUNCTIONAL WARRANTY IF IT IS USED IN ANY OF THE APPLICATIONS MENTIONED.

•

The radio modem is only to be operated at frequencies allocated by local authorities, and without exceeding the given maximum allowed output power ratings. Topcon and its distributors are not responsible, if any products manufactured by it are used in unlawful ways.

•

The devices mentioned in this manual are to be used only according to the instructions described in this manual. Faultless and safe operation of the devices can be guaranteed only if the transport, storage, operation and handling of the devices are appropriate. This also applies to the maintenance of the products.

•

To prevent damage both the radio modem and any terminal devices must always be switched OFF before connecting or disconnecting the serial connection cable. It should be ascertained that different devices used have the same ground potential. Before connecting any power cables the output voltage of the power supply should be checked.

•

If the device uses an outdoor antenna, the antenna cable jacket must be grounded.

1. The warranty against defects in a Topcon battery, charger, or cable is 90 days.

Warranty and Safety Instructions

SRL-35 Operator’s Manual P/N: 1003224-01

General Warnings

To comply with RF exposure requirements, maintain at least 25cm between the user and the radio modem.

This product should never be used:

•

Without the user thoroughly understanding this manual.

•

After disabling safety systems or altering the product.

•

With unauthorized accessories.

•

Without proper safeguards at the survey site.

•

Contrary to applicable laws, rules, and regulations.

This product should never be used in dangerous environments.

Radio Warnings

Tampering with the radio by the end users or non-factory authorized technicians will void the radio’s warranty:

• Do not attempt to open the radio and modify any of its internal components.

• Do not charge in conditions different than specified.

• Do not short circuit.

Warranty and Safety Instructions

Usage Warnings

If this product has been dropped, altered, transported or shipped without proper packaging, or otherwise treated without care, erroneous measurements may occur. The owner should periodically test this product to ensure it provides accurate measurements. Inform TPS immediately if this product does not function properly.

General Warnings

SRL-35 Operator’s Manual P/N: 1003224-01

Appendix A

ASCII CHARACTER TABLE

DHA

00NUL

11SOH44 2C ,8757W130 82 173 AD 216 D8

22STX45 2D - 8858X 131 83 174 AE 217 D9

33ETX46 2E . 8959Y 132 84 175 AF 218 DA

44EOT47 2F /905AZ133 85 176 B0 219 DB

55ENQ48 30 0915B[ 134 86 177 B1 220 DC

66ACK49 31 1925C\ 135 87 178 B2 221 DD

77BEL50 32 2935D] 136 88 179 B3 222 DE

88BS 51 33 3945E^137 89 180 B4 223 DF

99HT 52 34 4955F_138 8A 181 B5 224 E0

10 A LF 53 35 5 9660` 139 8B 182 B6 225 E1

11 B VT 54 36 69761a140 8C 183 B7 226 E2

12 C FF 55 37 79862b141 8D 184 B8 227 E3

13 D CR 56 38 8 9963c 142 8E 185 B9 228 E4

14 E SO 57 39 9 100 64 d 143 8F 186 BA 229 E5

15 F SI 58 3A : 101 65 e 144 90 187 BB 230 E6

16 10 DLE 59 3B ;10266f145 91 188 BC 231 E7

17 11 DC1 60 3C < 103 67 g 146 92 189 BD 232 E8

D H ADHAD H ADHAD H A

43 2B + 8656V 129 81 172 AC 215 D7

Appendix A

18 12 DC2 61 3D = 104 68 h 147 93 190 BE 233 E9

19 13 DC3 62 3E > 105 69 i 148 94 191 BF 234 EA

20 14 DC4 63 3F ? 106 6A j 149 95 192 C0 235 EB

21 15 NAK 64 40 @1076Bk 150 96 193 C1 236 EC

22 16 SYN 65 41 A 108 6C l 151 97 194 C2 237 ED

23 17 ETB 66 42 B 109 6D m 152 98 195 C3 238 EE

24 18 CAN 67 43 C 110 6E n 153 99 196 C4 239 EF

25 19 EM 68 44 D 111 6F o 154 9A 197 C5 240 F0

26 1A SUB 69 45 E 112 70 p 155 9B 198 C6 241 F1

27 1B ESC 70 46 F 113 71 q 156 9C 199 C7 242 F2

28 1C FS 71 47 G 114 72 r 157 9D 200 C8 243 F3

29 1D GS 72 48 H 115 73 s 158 9E 201 C9 244 F4

30 1E RS 73 49 I 116 74 t 159 9F 202 CA 245 F5

31 1F US 74 4A J11775u160 A0 203 CB 246 F6

32 20 SP 75 4B K 118 76 v 161 A1 204 CC 247 F7

33 21 ! 76 4C L 119 77 w 162 A2 205 CD 248 F8

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34 22 " 77 4D M 120 78 x 163 A3 206 CE 249 F9

35 23 # 78 4E N 121 79 y 164 A4 207 CF 250 FA

36 24 $ 79 4F O 122 7A z 165 A5 208 D0 251 FB

37 25 % 80 50 P 123 7B { 166 A6 209 D1 252 FC

38 26 & 81 51 Q 124 7C | 167 A7 210 D2 253 FD

39 27 ' 82 52 R 125 7D } 168 A8 211 D3 254 FE

40 28 ( 83 53 S1267E~169 A9 212 D4 255 FF

41 29 ) 84 54 T1277F 170 AA 213 D5

42 2A * 85 55 U 128 80 171 AB 214 D6

Appendix A

SRL-35 Operator’s Manual P/N: 1003224-01

Appendix B

Functional Delays

Function Delay (ms)

Table 26. Functional Delays

Wakeup time from STAND-BY to ON (controlled by DTR line)

Wakeup time from Power OFF  Power ON (=ready to receive)

Serial interface, turnaround time of RS-232 0

TX mode: Wakeup time from SLEEP to modem ready (triggered by IRQ-data when Data in TX-input).

RX mode: Wakeup time from SLEEP to modem ready (triggered by IRQ-data when Data in TX-input).

RX- TX turnaround wait, if RX freq. TX frequency.

TX- TX turnaround wait if TX frequency changes. > 20ms app. > 40 ms recommended for compatibility prior to

SL-Ping response time from remote modem 222 ms, modem to modem w/o repeaters

Transmission Related Delays

Delay from the end of transmission to the end of reception on the serial interface:

123 ms (CTS active)

123 ms/typical

60ms, typical

40ms, typical

> 20ms app. > 40 ms recommended for compatibility prior to other 3AS-family members.

other 3AS-family members.

Appendix B

Figure 14: Transmission Delay

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Transmission Delays When the Radio TX Frequency is Changed

• If the modem’s transmitter frequency (TX) is different than the receiver frequency (RX), there has to be at least 40 ms delay from the Receive Data (RX) to Transmit Data (TX).

• If the transmitter frequency is changed by an SL-command, there has to be at least 40 ms delay after the SL-command before the Transmit Data.

• If the transmitter frequency is changed from TX1 to TX2 by an SL-command during the transmission, there has to be at least 40 ms delay after the SL-command before the Transmit Data.

Transmission Delays When Using a 12.5 kHz Radio Channel

Transmission Delays without FEC-function (Forward Error Correction)

Table 27. Number of Bytes Sent

Bps 1 10 100 500

Appendix B

1200

4800

9600

19200

38400

40 40 29 22

34 34 31 22

32 32 32 27

32 35 64 193

32 36 91 352

Delays are in milliseconds and with a 10% margin.

Transmission Related Delays

Figure 15: 12.5 kHz Radio Channel without Error Correction

SRL-35 Operator’s Manual P/N: 1003224-01

Transmission Delays with FEC-function (Forward Error Correction)

Table 28. Number of Bytes Sent

Bps 1 10 100 500

Appendix B

1200

4800

9600

19200

38400

52 49 48 50

45 45 44 44

44 44 68 121

44 44 104 360

48 48 132 496

Delays are in milliseconds and with a 10% margin.

Transmission Related Delays

Figure 16: 12.5 kHz Radio Channel with Error Correction

SRL-35 Operator’s Manual P/N: 1003224-01

Transmission Delays using a 25 kHz Radio Channel

Transmission Delays without FEC Function (Forward Error Correction)

Table 29. Number of Bytes Sent

Bps 1 10 100 500

Appendix B

1200

4800

9600

19200

38400

30 30 18 16

23 23 21 12

23 23 21 17

22 22 22 19

22 22 38 102

Delays are in milliseconds and with a 10% margin.

Transmission Related Delays

Figure 17: 25 kHz Radio Channel without Error Correction

SRL-35 Operator’s Manual P/N: 1003224-01

Transmission Delays with FEC Function (Forward Error Correction)

Table 30. Number of Bytes Sent

Bps 1 10 100 500

Appendix B

1200

4800

9600

19200

38400

35 34 29 30

28 28 27 23

28 28 28 23

28 28 36 64

27 27 58 185

Delays are in milliseconds and with a 10% margin.

Transmission Related Delays

Figure 18: 25 kHz Radio Channel with Error Correction

SRL-35 Operator’s Manual P/N: 1003224-01

Appendix C

It is highly recommended to use TRU or SRL-35 display to change the radio settings. Changing parameters using SL Commands and Terminal mode is only suggested for advanced users.

Changing Parameters Using a Terminal Device

Changing the Settings

1. Connect cables (RS-232 cable to PC COM-port, power supply cable to power supply).

2. Switch on the PC and run TRU on the PC.

3. Set the serial port parameters of the program as follows: 9600 bits/s, 8 data bits, none parity, 1 stop bit, which is always the default in Programming Mode).

4. Connect in Modem Managing mode in TRU and once connected click on Terminal Mode icon located on the left bottom corner.

Appendix C

Figure 19: TRU Modem Managing Terminal Mode

SRL-35 Operator’s Manual P/N: 1003224-01

5. Send SL% P=1 command to bring up the Terminal Program startup screen.

Figure 20: TRU Terminal

6. Make desired changes to the settings with Terminal Program as mentioned in the section below.

7. Save changes by pressing ”E” in the main menu. If you don’t want to save changes, press ”Q”.

8. Exit TRU and disconnect the RS-232 cable from the PC. The radio modem should now return to the Data Transfer Mode.

Appendix B

Restoring Factory Settings

The settings that the modem was delivered from the factory are called “factory settings”.

“Restore factory settings” selection is achieved by selecting “A” from the menu list.

Factory settings are restored by selecting ”Y” (YES). By pressing “N” (NO) or any other button no changes is done and current settings will remain active. The modem will ask this question twice to make ensure that this is a valid command.

Changing Parameters Using a Terminal Device

Figure 21: Program Menu

SRL-35 Operator’s Manual P/N: 1003224-01

Enter selection >A

Restore factory settings

----------------------- Do you want to restore factory settings? (Y/N)>

Appendix B

PORT 1

of the radio modem is connected to a terminal device or a PC, which is in terminal emulation state. (This can be accomplished by using a suitable program such as TRU. Check the wiring of the serial port connection cable. Terminal device serial port settings must be set to 9600 bps, N, 8, 1 (data transfer speed 9600 bps, none parity, data length 8 bits and one (1) stop bit). Following this the radio modem will transmit the following message to the terminal (certain configuration settings might differ from the ones shown):

***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 / S/N: YYMMxxxx

-----------

Current settings

----------------

1) Radio frequency TX: 438.0000 MHz / RX: 438.0000 MHz / Ref freq: 438.0000 MHz / Spacing 25 kHz

2) Radio settings Tx power 35W / Signal threshold -115 dBm / FCS OFF / TX start delay 0 ms / Compatibility Satel 3AS / Call sign OFF

3) Addressing RX address OFF / TX address OFF / RX address to RS port OFF / TX address autoswitch OFF

4) Serial port 1 ON / 9600 bit/s / 8 bit data / None parity / 1 stop bit

5) Serial port 2 OFF / 9600 bit/s / 8 bit data / None parity / 1 stop bit (TTL)

6) Handshaking CTS Clear to send / CD RSSI-threshold / RTS Ignored / Pause length 3 bytes

7) Additional setup Error correction OFF / Error check OFF / Repeater OFF / SL Commands ON / Priority TX / Full CRC16 check OFF / User Data whitening OFF

8) Routing OFF

9) Tests OFF A) Restore factory settings B) INFO E) EXIT and save settings Q) QUIT without saving

------------------------------------------------------------------------

Enter selection >

After power cycle the modem returns to the default channel in the channel list. The changed RX/TX frequencies with Terminal Mode and SL Command will be overwritten with the default channel after power cycle.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Changing Frequency (Active Radio Channel Frequency)

The frequency of the active radio channel, TX or RX or both at the same time, can be changed by selecting main menu selection ”1”. In the example below the TX frequency is changed

from 468.52500 MHz to 468.50000 MHz.

Enter selection >1 Radio frequency setup

---------------------

1) Radio frequency

2) Channel spacing

Enter selection or ESC to previous menu >1 Radio TX and RX frequency setup

-------------------------------

1) TX and RX frequency

2) TX frequency 468.52500 MHz

3) RX frequency 437.00000 MHz

4) Reference frequency438.00000 MHz

Appendix B

Enter selection or ESC to previous menu >2 Radio TX frequency setup

-----------------------TX frequency 468.52500 MHz RX frequency 437.00000 MHz Lower limit band 1 403.00000 MHz Upper limit band 1 473.00000 MHz Lower limit band 2 403.00000 MHz Upper limit band 2 473.00000 MHz Channel spacing 25 kHz

Enter new TX frequency (MHz) or ESC to cancel >468.500 Enter Radio TX frequency setup

-----------------------TX frequency 468.50000 MHz RX frequency 437.00000 MHz Lower limit band 1 403.00000 MHz Upper limit band 1 473.00000 MHz Lower limit band 2 403.00000 MHz Upper limit band 2 473.00000 MHz Channel spacing 25 kHz

Enter new TX frequency (MHz) or ESC to cancel > To get back to the main menu press ESC, ESC, ESC and then E for Exiting and saving.

Maximum adjustment range of the active radio channel frequency is in between “Lower limit band1/2” and “Upper limit band1/2”, (default usable range is the full 70 MHz band). Because of possible deviations in each country and/or region concerning the authorised use of the frequency spectrum local authorities may limit this adjustment range. The frequency band limiting values are factory set and the user cannot change them.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Changing Reference Frequency

The Reference frequency (also known as “Center frequency”) defines the starting point, which is used by the specific SL-command to calculate the channels calculation is based on the selected channel spacing. The Reference frequency must be in between the upper/lower band limits. Number 1 is pressed in the Main menu.

Enter selection >1 Radio frequency setup

---------------------

1) Radio frequency

2) Channel spacing

Enter selection or ESC to previous menu >1 Radio TX and RX frequency setup

-------------------------------

1) TX and RX frequency

2) TX frequency 468.50000 MHz

3) RX frequency 437.00000 MHz

4) Reference frequency438.00000 MHz

above

below

the Reference frequency. The

Appendix B

Enter selection or ESC to previous menu >4 Radio reference frequency setup

------------------------------Reference frequency 438.00000 MHz Lower limit band 1 403.00000 MHz Upper limit band 1 473.00000 MHz Lower limit band 2 403.00000 MHz Upper limit band 2 473.00000 MHz

Enter new frequency (MHz) or ESC to cancel >460.000 Enter

Reference frequency 460.00000 MHz Lower limit band 1 403.00000 MHz Upper limit band 1 473.00000 MHz Lower limit band 2 403.00000 MHz Upper limit band 2 473.00000 MHz

Enter new frequency (MHz) or ESC to cancel > To get back to the main menu press ESC, ESC, ESC and then E for Exiting and saving.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Changing Channel Spacing

The module can be set to different channel spacing. The values are: 12.5, 20 and 25 kHz.

Number 1 is pressed in the Main menu.

Radio frequency setup

---------------------

1) Radio frequency

2) Channel spacing 25 kHz

Enter selection or ESC to previous menu >2

Channel spacing

---------------

1) 12,5 kHz

2) 20 kHz

3) 25 kHz

Appendix B

Enter selection or ESC to previous menu > 1 Channel spacing

---------------

1) 12,5 kHz

2) 20 kHz

3) 25 kHz

Enter selection or ESC to previous menu > ESC Radio frequency setup

---------------------

1) Radio frequency

2) Channel spacing 12,5 kHz To get back to the main menu press ESC and then E for Exiting and saving.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Changing Radio Settings

Radio settings which consist of transmitter output power and receiver sensitivity can be configured by selecting main menu selection ”2”. In the following example both the transmitter output power (35W  20W) and the receiver sensitivity (-110 dBm–90 dBm) are changed.

Number 2 is pressed in the Main menu.

Enter selection >2 Radio setup

-----------

1) TX power 35 W

2) Signal threshold -115 dBm

3) TX start delay 0ms

4) Free Channel Scan RX Slave / OFF

5) Radio compatibility Satel 3AS

6) Call sign OFF

Enter selection or ESC to previous menu >1 TX power setup

--------------

1) 10W

2) 20W

3) 25W

4) 35W

Appendix B

Enter selection or ESC to previous menu >2 Radio setup

-----------

1) TX power 20W

2) Signal threshold -115 dBm

3) TX start delay 0ms

4) Free Channel Scan RX Slave / OFF

5) Radio compatibility Satel 3AS

6) Call sign OFF

Enter selection or ESC to previous menu >2 Signal threshold setup

-------------------------Signal threshold -115 dBm

Enter new value (80 - 118) or ESC to previous menu > -110 Enter

Signal threshold setup

-------------------------Signal threshold -110 dBm

Enter new value (80 - 118) or ESC to previous menu > To get back to the main menu press ESC (and then E for Exiting and saving).

The maximum useable sensitivity of the receiver is determined by the channel spacing (=radio interface data transfer speed) and also by error correction (utilised or not).

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

In environments with high levels of interference, and when connection distances are short, it is often beneficial to use a ”Signal threshold level” value, which is approximately 10 – 20 dBm above the maximum sensitivity level. This will prevent unnecessary receive attempts caused by noise.

The correct radio compatibility mode can be changed in the Programming mode by selecting Main Menu selection “5” (Radio Compatibility):

Radio Compatibility

• Satelline-3AS

• PCC 4-FSK

• PCC GMSK

• TRIMTALK GMSK, RX fitted to Pacific Crest transmitters

• TRIMTALK GMSK, RX fitted to Trimble transmitters

• PCC-FST

Changing Addressing Settings (Primary And Secondary RX and TX Addresses)

Addressing can be switched ON or OFF with the help of main menu selection ”3”. In the following example a primary RX address (receiver address) is switched ON and the corresponding hexadecimal address value is modified (”0000”  ”0020”). The current values of the parameters are displayed and changed in toggletype fashion by selecting the appropriate parameter selection number from the list displayed. The next menu level will then enable the modification of the values (within allowed limits). Modification of all other primary and secondary transmitter and receiver addresses is done in similar way.

Appendix B

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Number 3 is pressed in the Main Menu.

Addressing setup Toggle ON/OFF values. Current value shown.

------------------------------------------

1) RX address OFF

2) TX address OFF

3) RX address to RS port OFF

4) Change primary RX address

5) Change primary TX address

6) Change secondary RX address

7) Change secondary TX address

8) TX address autoswitch OFF

Enter selection or ESC to previous menu >1 Addressing setup Toggle ON/OFF values. Current value shown.

------------------------------------------

1) RX address ON 0000/0000

2) TX address OFF

3) RX address to RS port OFF

4) Change primary RX address

5) Change primary TX address

6) Change secondary RX address

7) Change secondary TX address

8) TX address autoswitch OFF

Appendix B

Enter selection or ESC to previous menu >4 RX address setup

---------------RX address ON 0000/0000

Enter new address (HEX) or ESC to previous menu >0020 Enter RX address setup

---------------RX address ON 0020/0000

Enter new address (HEX) or ESC to previous menu >

The new value is displayed in the menu.

To get back to the main menu press ESC (and then E for Exiting and saving).

The address is given in hexadecimal format with four digits and the number of different addresses is thus over 65 000.

Changing Serial Port Settings (Port 1)

The settings of serial PORT 1 can be modified by selecting main menu selection ”4”. In the following example, the data transfer speed of PORT 1 is modified (9600 bit/s modification of the number of data bits (8 à 7), then the number of parity bits (NONE  EVEN) and finally the number of stop bits is changed (1 à 2).



19200 bit/s), followed by the

NOTE!

The radio modem has one serial port, PORT 1 which complies with the RS-232 standard. PORT 2 is not in use and the settings of serial PORT 2 cannot be changed. Number 4 is pressed in the Main menu.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Now all of the modifications of the example have been performed and the new values are displayed:

Number 4 is pressed in the main menu.

Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 9600 bit/s

3) Data bits 8 bit data

4) Parity bits None parity

5) Stop bits 1 stop bit

Enter selection or ESC to previous menu >2

Serial port 1 data speed

------------------------

1) 300 bit/s

2) 600 bit/s

3) 1200 bit/s

4) 2400 bit/s

5) 4800 bit/s

6) 9600 bit/s

7) 19200 bit/s

8) 38400 bit/s

Appendix B

Enter selection or ESC to previous menu >7

Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 19200 bit/s

3) Data bits 8 bit data

4) Parity bits None parity

5) Stop bits 1 stop bit

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Enter selection or ESC to previous menu >3 Serial port 1 data bits

-----------------------

1) 7 bit data

2) 8 bit data

3) 9 bit data

Enter selection or ESC to previous menu >1 Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 19200 bit/s

3) Data bits 7 bit data

4) Parity bits None parity

5) Stop bits 1 stop bit

Enter selection or ESC to previous menu >4 Serial port 1 parity bits

-------------------------

1) None parity

2) Even Parity

3) Odd Parity

Appendix B

Enter selection or ESC to previous menu >2 Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 19200 bit/s

3) Data bits 7 bit data

4) Parity bits Even parity

5) Stop bits 1 stop bit

Enter selection or ESC to previous menu >5 Serial port 1 stop bits

-----------------------

1) 1 stop bit

2) 2 stop bits

Enter selection or ESC to previous menu >2

Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 19200 bit/s

3) Data bits 7 bit data

4) Parity bits Even parity

5) Stop bits 2 stop bits

Enter selection or ESC to previous menu > To get back to the main menu press ESC (and then E for Exiting and saving).

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Now all of the modifications of the example have been performed and the new values are displayed

Serial port 1 Settings

--------------

1) Port status ON

2) Data speed 9600 bit/s

3) Data bits 8 bit data

4) Parity bits None parity

5) Stop bits 1 stop bit

***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 / S/N: YYMMxxxx

------------------------------------------------------------------------------Current settings

----------------

1) Radio frequency TX: 468.50000 MHz / RX: 437.00000 MHz / Ref freq: 460.00000 MHz / Spacing 12.5kHz

2) Radio settings TX power 35W / Signal threshold -110 dBm / FCS OFF / TX start delay 0ms / Compatibility Satel 3AS / Call sign OFF

3) Addressing RX address ON 0020/0000 / TX address OFF / RX address to RS port OFF / TX address autoswitch OFF

4) Serial port 1 ON / 19200 bit/s / 7 bit data / Even parity / 2 stop bit

5) Serial port 2 OFF / 9600 bit/s / 8 bit data / None parity / 1 stop bit (TTL)

6) Handshaking CTS Clear to send / CD RSSI-threshold / RTS Ignored / Pause length 3 bytes

7) Additional setup Error correction OFF / Error check OFF / Repeater OFF / SL Commands ON / Priority TX / Full CRC16 check OFF / User Data whitening OFF

8) Routing OFF

9) Tests OFF A) Restore factory settings B) Info E) EXIT and save settings Q) QUIT without saving

Appendix B

Enter selection >

Press E for Exiting and saving.

The settings of the serial port must be modified to correspond with the settings of the terminal device that is to be connected to the radio modem.

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Modification of Handshaking Functions

Handshaking related configuration settings can be modified by selecting the options from the main menu ”6”. In the following example characteristics of the CTS-line (CLEAR TO SEND  TX BUFFER STATE), CD-line (RSSI-THRESHOLD  DATA ON CHANNEL) and RTS-line (IGNORED



FLOW CONTROL) are changed.

Number 6 is pressed in the Main menu.

Serial ports 1 and 2 Handshaking

--------------------------------

1) CTS line property Clear to send

2) CD line property RSSI-threshold

3) RTS line property Ignored

4) Pause length 3 bytes

Enter selection or ESC to previous menu >1

Select CTS line action property

-------------------------------

1) Clear to send

2) TX buffer state

Appendix B

Enter selection or ESC to previous menu >2

Serial ports 1 and 2 Handshaking

--------------------------------

1) CTS line property TX buffer state

2) CD line property RSSI-threshold

3) RTS line property Ignored

4) Pause length 3 bytes Enter selection or ESC to previous menu >2

Select CD line action property

------------------------------

1) RSSI-threshold

2) Data on channel

3) Always ON

Enter selection or ESC to previous menu >2

Serial ports 1 and 2 Handshaking

--------------------------------

1) CTS line property TX buffer state

2) CD line property Data on channel

3) RTS line property Ignored

4) Pause length 3 bytes

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Enter selection or ESC to previous menu >3

Select RTS line action property

-------------------------------

1) Ignored

2) Flow control

3) Reception Control

Enter selection or ESC to previous menu >2

Serial ports 1 and 2 Handshaking

--------------------------------

1) CTS line property TX buffer state

2) CD line property Data on channel

3) RTS line property Flow control

4) Pause length 3 bytes

Enter selection or ESC to previous menu > To get back to the main menu press ESC (and then E for Exiting and saving).

Now all of the modifications of the example have been performed and the new values are displayed on the menu as follows:

Appendix B

***** SRL-35 ***** FW: 06.18.x.xx / HW: SPL0005d+EPT / PV: 05.00 / IM: 05 / /N: YYMMxxxx

------------------------------------------------------------------------------Current settings

----------------

1) Radio frequency TX: 438.00000 MHz / RX: 450.00000 MHz / Ref freq: 438.00000 MHz / Spacing 20kHz

2) Radio settings TX power 35W / Signal threshold -118 dBm / FCS OFF / TX start delay 0ms / Compatibility Satel 3AS / Call sign OFF

3) Addressing RX address OFF / TX address OFF / RX address to RS port OFF / TX address autoswitch OFF

4) Serial port 1 ON / 9600 bit/s / 8 bit data / None parity / 1 stop bit

5) Serial port 2 OFF / 9600 bit/s / 8 bit data / None parity / 1 stop bit ( TTL )

6) Handshaking CTS TX buffer state / CD Data on channel / RTS Flow control / Pause length 3 bytes

7) Additional setup Error correction OFF / Error check OFF / Repeater OFF / SL Commands ON / Priority TX / Full CRC16 check OFF /

User Data whitening OFF

8) Routing OFF

9) Tests OFF A) Restore factory settings B) Info E) EXIT and save settings Q) QUIT without saving

Enter selection >

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Special Functions

Special functions are modified by selecting from the main menu selection ”7”. The current values of the parameters are displayed and can be modified in toggle-type fashion by choosing the appropriate parameter selection number from the list displayed. The next menu level will then enable the modification of the values (within allowed limits).

Number 7 is pressed in the Main Menu.

Additional setup Toggle ON/OFF values. Current value shown.

------------------------------------------

1) Error correction OFF

2) Error check OFF

3) Repeater OFF

4) SL-commands ON

5) Priority TX

6) Full CRC16 check OFF

7) User Data whiten OFF

Enter selection or ESC to previous menu >

Appendix B

Activating Tests

Enter selection >9

Tests setup

-----------

1) Short block test OFF

2) Long block test OFF

Tests can be activated by selecting main menu selection ”9”. Tests are activated by setting the status of the desired test to ”ON” and will remain active until the value of the selection in the menu is returned to the value ”OFF”.

Restoring Factory Settings

The settings that the modem was delivered from the factory are called “factory settings”.

Selecting main menu selection “A” can restore factory settings.

Enter selection >A

Restore factory settings

----------------------- Do you want to restore factory settings? (Y/N)>

Changing Parameters Using a Terminal Device

SRL-35 Operator’s Manual P/N: 1003224-01

Restoring is confirmed by pressing ”Y” (Y=YES) or cancelled by pressing ”N” (N=NO). Also the pressing of ”ESC” button at any point in the procedure will return the display to the previous (next higher) menu level without restoring factory settings.

Info

The Info display shows all the functionality of the modem.

Device = Modem type. Serial number= yyyymmddxxx. FW version= xx.xx.xx.xx.

Board version= Main board version SPLxxxxn. Module version=Voltage range, Port 2 interface. Tuning range= Total tuning range.

Enter selection >b Info menu

--------------------------------------Device: SRL-35 Serial number: xxxxxxxxxxxxx FW version: 06.18.x.xx Board version: SPL0005d+EPT Module version: Voltage:9-16V Tuning range: 403.00000 - 473.00000 MHz

Appendix B

Press any key to return >

Saving Modified Settings into the Permanent Memory

All modified settings must be saved into the permanent non-volatile memory of the radio modem before switching out of the Programming Mode. Selecting the main menu selection “E” automatically saves the settings:

Enter selection >E

Configuration saved! Please turn off program

mode switch!

Changing Parameters Using the SL Commands

The controlling terminal device can change the configuration settings of a radio modem. This is accomplished with the help of SL Commands, which can be used in data transfer mode. SL Commands can be used to change e.g. the frequency or addresses. It is also possible to interrogate a radio modem in order to gain information concerning current settings that are in use. The terminal device is either a PC or a programmable logic (PLC) together with suitable (terminal) program (TRU). SL Commands must be enabled using Programming Mode before they can be used.

An SL-command is a continuous string of characters, which is separated from other data by pauses that are equal or greater than time defined by Pause length parameter in the set-up. No extra characters are allowed at the end of an SL-command. Serial interface settings are the same as in data transfer and MODE pin of the serial connector MUST NOT be connected to ground (GND). SL-command is properly recognized also in the case when the command string is terminated in <CR> (=ASCII character no. 13, Carriage Return,

Changing Parameters Using the SL Commands

SRL-35 Operator’s Manual P/N: 1003224-01

0x0d) or <CR><LF> (<LF> = ASCII char. no. 10, Line Feed, 0x0a). If multiple SL commands are sent to the radio modem the next command can be given after receiving the response ("Ok" or "Error") of the proceeding command. In addition, it is recommended to implement a timeout to the terminal software for recovering the case when no response is received from the radio modem.

When the power of a radio modem is switched off the configuration settings of a radio modem always return to values defined initially using the Programming Mode, thus resetting any settings changed using SL Commands during power on. It is however possible to save settings changed by using SL Commands and to make them the new configuration settings.

The radio modem will acknowledge all commands by returning an "OK" (command carried out or accepted) or the requested value, or an "ERROR" (command not carried out or interpreted as erroneous) message.

In case you need more information on the time delays related to the use of SL Commands, please contact the manufacturer.

Frequency

Table 31. Frequency Commands

Command Effect and description of command

SL&FR=nnn.nnnnn Set RX frequency to nnn.nnnnn MHz

Appendix B

SL&FT=nnn.nnnnn Set TX frequency to nnn.nnnnn MHz

SL&F=nnn.nnnnn Set both RX&TX-frequency to same nnn.nnnnn MHz

SL&FR? Get RX frequency (response 'nnn.nnnnn MHz')

SL&FT? Get TX frequency (response 'nnn.nnnnn MHz')

SL&F? Get RX&TX frequencies (response TX nnn.nnnnn MHz, RX nnn.nnnnn MHz)

SL&C? Get Reference (Center) frequency (response 'nnn.nnnnn MHz')

SL&C=nnn.nnnnn Set Reference (Center) frequency to nnn.nnnnn MHz

SL&+=nn Set RX&TX frequency nn channels above reference frequency

Frequency = Reference frequency + nn * Channel spacing, where nn=[0...Number of channels/2]

SL&-=nn Set RX&TX frequency nn channels below reference frequency

Frequency = Reference frequency – nn * Channel spacing, where nn=[0…Number of channels/2]

SL&N? Get current RX&TX- frequency deviation from reference frequency as channels (Frequency – Center

frequency)/Channel spacing (response ‘+nn’ or ‘-nn’)

SL&W? Get channel spacing (response ‘nn.n kHz’)

SL&D=x Set operational mode of the radio. The different values of x are:

S = Single Channel D = Dual Channel R = Reverse Dual Channel Note! Use this command only, if the setup of the frequency bands matches the Dual Channel operation.

SL&D? Get operational mode of the radio. The response is one of the following:

S = Single Channel D = Dual Channel R = Reverse Dual Channel Note! Use this command only, if the setup of the frequency bands matches the Dual Channel operation.

Changing Parameters Using the SL Commands

SRL-35 Operator’s Manual P/N: 1003224-01

Addressing

xxxx = address in hexadecimal format (0000 … FFFF)

Figure 22: Addressing Commands

Command Effect and description of command

SL#I=xxxx Set all addresses (RX1, RX2, TX1, TX2) to value xxxx

SL#I? Get both primary addresses (TX1, RX1) (response ’xxxx;yyyy’)

SL#T=xxxx Set both transmit addresses (TX1, TX2) to value xxxx

SL#T? Get primary transmit address (TX1) (response ‘xxxx’)

SL#R=xxxx Set both receive addresses (RX1, RX2) to value xxxx

SL#R? Get primary receive address (RX1) (response ‘xxxx’)

Appendix B

SL#Q=x Set TX address on x=1, off x=0

SL#Q? Get status of the TX address (response ‘1’ on, response ‘0’ off

SL#W=x Set RX address on x=1, off x=0

SL#W? Get status of the RX address (response ‘1’ on, response ‘0’ off

SL#P=xxxx;yyyy Set primary transmit address (TX1) to value xxxx and receive address (RX1) to value yyyy

SL#S=xxxx;yyyy Set secondary transmit address (TX2) to value xxxx and receive address (RX2) to value yyyy

SL#P? Get primary transmit address (TX1) and receive address (RX1)

(response ‘xxxx;yyyy’)

SL#S? Get secondary transmit address (TX2) and receive address (RX2)

(response ‘xxxx;yyyy’)

SL#A=xxxx,yyyy,ww ww,zzzz

SL#A? Get all addresses (response ´xxxx, yyyy, wwww, zzzz)

Set addresses to values TX1=xxxx TX2=yyyy RX1=wwww RX2=zzzz

Changing Parameters Using the SL Commands

SRL-35 Operator’s Manual P/N: 1003224-01

Radio Parameters

Table 32. Radio Parameter Commands

Command Effect and description of command

SL@R? Get field strength of the last received message (the value is an average of many measurements made

during the same reception). Response ”-xx dBm”, where xx is a decimal value of the field strength and it is between –80 dBm and

–118 dBm. Value available 7s after reception. SATELLINE-3AS Epic returns the stronger value of two receivers.

SL@P=xxxxx Set RF output power, where xxxxx is the decimal value of the intended power in mW. If the given

value does not correspond to one of the programmed power levels, the output power is set to the nearest possible value.

SL@P? Get RF output power.

Response ”xxxxx mW”, where xxxxx is a decimal value the output power of the transmitter.

SL@T=-xxx Set minimum power level of the signal to be received (="Signal Threshold level), where xxx is a

decimal value of the new intended level in dBm.

SL@T? Get current "Signal Threshold Level". Response is "-xxx dBm.

SL@D=x Set TX delay. Value x = 0…65535 ms

SL@D? Get TX delay value. Response ‘x ms’

Appendix B

SL@F? Get current noise level on the radio channel. Response "-xxx dBm".

Configuration of Radio Protocol using SL Commands

“SL@S=” command selects the compatibility mode:

• ”SL@S=0” sets SATELLINE-3AS (default).

• ”SL@S=1” sets PCC-4FSK

• ”SL@S=2” sets PCC-GMSK

• ”SL@S=3” sets TRIMTALK GMSK, RX fitted to Pacific Crest transmitters

• “SL@S=4” sets TRIMTALK GMSK, RX fitted to Trimble transmitters

• “SL@S=5” sets PCC-FST

The modem responds with “OK” message if the requested mode is supported or “ERROR” if the mode is not allowed.

“SL@S? enquirers the active mode. The modem responds with a number:

• “0” if the mode is SATEL 3AS

• “1” if the mode is PCC-4FSK

• “2” if the mode is PCC-GMSK

• “3” if the mode is TRIMTALK GMSK, RX fitted to Pacific Crest transmitters

• “4” if the mode is TRIMTALK GMSK, RX fitted to Trimble transmitters

• “5” if the mode is PCC-FST

Changing Parameters Using the SL Commands

SRL-35 Operator’s Manual P/N: 1003224-01

Other Functions

Table 33. Other Functions

Command Effect and description of command

SL**> Set current settings as permanent settings.

This command must be used only seldom and under controlled conditions in order to avoid the corruption of the settings, which may happen in case the power supply fails in the middle of the memory save procedure.

SL%V? Get Firmware revision information (response ’Vn.nn’)

SL%D? Get modem type

SL%S? Get modem serial number (response ‘nnnnnnnnnn’ or ‘No Serial nr’)

SL%C? Get specified information field. If not specified the response is ‘No version id’). For more information

please contact Topcon.

SL%P=1 Activate Programming mode without the use of PROG pin. Note that the serial port data speed

remains the same as in the data transfer mode.

SL%B? Get serial data parameters, response is a,b,c,d where

a= "38400", "19200", "9600", "4800", "2400" or "1200" (defines the baud rate) b= "8", "7" or "9" (defines the character length) c= "N", "E" or "O" (defines the parity) d= "1" or "2" (defines the number of stop bits)

Appendix B

SL%B=a,b,c,d Set serial data parameters for data ports, where

SL+P=xx Get measured signal strength from the remote modem i.e. SL “ping”.

If a remote radio modem is pinged the response is “OK, Modem xxxx rssi –80 dBm”, where xxxx=RX1/RX2 address (in case the TX/RX addressing is configured) or the terminal address of the modem ( in case the Message Routing is ON). “OK” is first received from the current radio modem to acknowledge that the SL-ping command has been interpreted correctly. The rest of the response will take a little longer to come, depending on the length of the radio link.

The remote radio modem that is to be pinged does not need to have SL Commands ON. The value of the RSSI is between –118 and –80 dBm. If the signal strength is better than –80 dBm, -

80 dBm is shown. If the current radio modem is pinged, the response is “Local OK”. Please note that the SL-ping message will come out from the serial line of the radio modem that is

pinged and also the repeater stations using the TX/RX addressing. Note, SL-ping is a very short message so it may not give accurate results from the link condition.

Even if the responses are good, channel interference may cause problems with longer data messages.

Changing Parameters Using the SL Commands

SRL-35 Operator’s Manual P/N: 1003224-01

Regulatory

The SRL-35 complies with the following international standards:

• EN 300 113-2 (RF-requirements)

• EN 301 489 (EMC-requirements)

• EN 60950 (Safety Standard)

• FCC CFR47 part 90

Product Conformity

The SRL-35 radio modem is in compliance with the essential requirements (radio performance, electromagnetic compatibility and electrical safety) and other relevant provisions of Directive 1999/5/EC. Therefore the equipment is labeled with the following CE-marking. The notification sign informs users that the operating frequency range of the device is not harmonized throughout the market area, and the local spectrum authority should be contacted before the usage of the radio modem is used.

Regulatory

SRL-35 Operator’s Manual P/N: 1003224-01

Topcon SRL-35 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Preface

Introduction

Components and Accessories

Default Settings

SRL-35 Special Features

Call Sign

Temperature Protection of RF Power Amplifier

Protection of Current

Radio Interface

Serial Interface

User Interface

LED Indicators

Display and Push Buttons

SRL-35 LCD Display After Power-up

Display in Data Transfer Mode (transmit/receive mode)

Info - Setup

Display in Info Mode

Display in Setup Mode

RF Interface

Transmitter

Receiver

Priority RX/TX

Forward Error Correction

Error Checking

User Data Whitening

Transparent Data Transmission

Serial Interface, Data Format

Handshake Lines

CTS-line

CD-line

RTS-line

Radio Protocol Support

Timing and Delays During Data Transmission

Data Buffering in the Radio Data Modem

Pause Length

TX Delay

Testing

Short Data Block Test

Long Data Block Test

Latency in PCC Transparent Mode

Transmission Delays using Pacific Crest 4FSK on 25 kHz channel

Transmission Delays using Pacific Crest GMSK on 25 kHz channel

Settings

Programming Mode

Changing Parameters using TRU

Connecting in Modem Managing Mode

Configuring Radio in Modem Managing Mode

Loading Frequencies/Channels

Changing Parameters using the LCD Display

Changing Channel (Channel of the Active TX/RX Radio with Preset Frequencies)

Changing Protocol (Radio Protocol of the Active Radio)

Select Repeater (Set SRL-35 to Act as a Repeater)

Select FEC

Saving Parameter Setup Changes

TrimTalk, and Pacific Crest Mode Settings

Installation

Check List

Installation of a Radio Data Modem

RS-232 Wiring

Fuse

Power Supply

Antenna Installation

Mobile Equipment

Base Stations

General Antenna Installation Instructions

Factors Affecting the Quality and Distance of the Radio Connection

Radio Field Strength

Repeater Mode and Addressing

Repeater

Addressing

Transmission:

Reception:

Connection Between Two Points

System of One Base Station and Several Substations

Using Repeaters and Addresses in the Same System