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Topcon SRL-35 Operator'S Manual Download Page 48

Repeater Mode and Addressing

38

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.

Figure 12: Repeater

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

(Repeater ON)

SL@M=O

(Repeater OFF)

or by selecting

Repeater OFF/ON

from the SRL-35 display menu.

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Summary of Contents for SRL-35

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Page 3: ...ember 2013 All contents in this manual are copyrighted by Topcon All rights reserved The information contained herein may not be used accessed copied stored displayed sold modified published distributed or otherwise reproduced without express written consent from Topcon ...

Page 4: ...splay 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 ...

Page 5: ...ing 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 S...

Page 6: ...d 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 ...

Page 7: ...s 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 ...

Page 8: ...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 register...

Page 9: ... unused software and manual 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 restr...

Page 10: ...dified 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 ...

Page 11: ...en 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 Figure 1 SRL 35 High out...

Page 12: ...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 Ante...

Page 13: ...hreshold 115 dBm 80 118 dBm FCS OFF ON OFF 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 96...

Page 14: ...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 a...

Page 15: ...lling 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 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 po...

Page 16: ...ired 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 Port 1 which complies with the RS 232...

Page 17: ...d 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 SETUP button When activated the menu shows a listing of the changeable paramet...

Page 18: ... Pressing shows the next window n 123 11 5V CH4 10W 462 37500 12 5 INFO SETUP 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 PacCrest 4FSK Exit Protocol Repeater OFF FEC OFF Port 1 9600 8N1 Exit Repeater FEC Po...

Page 19: ...requency 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 S N XXXXXX FW XXXXXX Exit Serial Number FW Firmware Version Board SPL0005E SLR 35 IM 05 Exit Board HW version IM Interface m...

Page 20: ...t connection distances can in the worst case cause disturbances to the overall operation of the system A product variant providing 25 W power levels is available by separate order 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 Table 10 Typical outpu...

Page 21: ...efore 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 To toggle 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 Corr...

Page 22: ...age 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 ...

Page 23: ...io 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 mo...

Page 24: ...mple 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 switch to active state only after recognition of a valid data transmission CD will not react to interference signals 3 Always ON CD is always in the active state This option can be used with terminal equipment which use the CD line as an indicator of an active conn...

Page 25: ...ent 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 So far only the transparent mode is implemented since it is the most commonly used and recommended by the user manuals ...

Page 26: ...sion 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 In the receive mode the buffer works principally in the above describ...

Page 27: ...o 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 There are two Test Modes Short Data Block Test In this test mode the radio modem sends a short test string which is preceded ...

Page 28: ... PCC Transparent Mode 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 chan...

Page 29: ...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 ...

Page 30: ...5 are fully configurable in Programming Mode by using Topcon Receiver Utility TRU and the Data Cable NARS ST for 8 pin connector In the Programming Mode the radio modem is forced to use serial PORT1 with settings 9600 bps N 8 1 data 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 ra...

Page 31: ...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 6 Once connected in Modem Managing mode configure the radio modem by using the Settings and Functions tabs Serial port parameters of the program as follows 9600 bits s 8 data bits none parity 1 stop bit default in Programming Mode ...

Page 32: ...vice Application Mode Modem Managing mode Settings 2 To configure the radio use the Settings tab in Modem Managing mode 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 ...

Page 33: ...ncies 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 ...

Page 34: ...n of TRU You are not required to connect to the radio to create MCF file or any other configuration file Figure 7 Choose Frequency Editing ModeClick the MCF Creator icon to create MCF Files for user distribution Figure 8 MCF Creator Icon 5 When MCF Creator dialog appears click Add to add a frequency along with channel number spacing and max power ...

Page 35: ...ettings Changing Parameters using TRU 25 SRL 35 Operator s Manual P N 1003224 01 Figure 9 MCF Creator Add Figure 10 MCF Entry Dialogue Box Maximum power is the power level in mW to the particular channel ...

Page 36: ...r 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 SETUP button The main menu is used to select the desired submenus and the modifications are performed using these submenus It...

Page 37: ...fiable parameters Pressing the buttons the cursor moves upwards and downwards When the cursor is placed beside the desired selection entry into sub menu is done by pressing the SELECT button Select Channel Select Protocol Select Repeater ON OFF Select FEC ON OFF EXIT Select Press or until the display panel and the cursor points to Select Channel and press Select to move onto the next submenu to ch...

Page 38: ...NCEL if not modifying protocol and return to previous menu SATELLINE 3AS PacCrest 4FSK PacCrest GMSK TrimTalk 450S P TrimTalk 450s T PacCrest FST CANCEL SET If protocol is modified press YES to save settings or NO to discard changes and return to previous menu Save changes NO YES Press or until the display panel and the cursor points to Select Repeater and press Select to move onto the next submen...

Page 39: ...nto the next submenu to turn FEC off or on SELECT FEC OFF EXIT Select 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 FEC OFF FEC ON CANCEL SET 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 cor...

Page 40: ...C here means SATEL 3AS FEC not Pacific Crest TRIMTALK FEC 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 Re...

Page 41: ...t 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 Note SRL 35 FEC must be OFF Radio Link Local Address 0 by default Primary RX address RX1 OFF by d...

Page 42: ...03224 01 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 Table 16 PacCrest and SRL 35 Settings ...

Page 43: ...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 ...

Page 44: ...ent 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 bas...

Page 45: ...ed 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 If there is a line of sight...

Page 46: ...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 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 ampli...

Page 47: ...essful 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 th...

Page 48: ...it 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...

Page 49: ...ddress 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 e...

Page 50: ... 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 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 Reception addressing has been set ON but boththeprimaryandsecondaryRXaddresses of...

Page 51: ...o 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 devices The base station may in such a case define the destination of a message by adding the address of the corresponding rad...

Page 52: ...es 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 All radio modems in the network must be set to a state in which the RX addressing is switched ON and TX addressing 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...

Page 53: ...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 pac...

Page 54: ...sages 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 de...

Page 55: ...A 6 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 100 22 C 20 min 100 35 C 13 min 40 No limit Duty Cycle 10W a 100 22 C No limit 100 35 C 50 min 40 No limit Frequency Error Tolerance 1 kHz Sensitivity 114 ...

Page 56: ...lly 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 Table 21 Data Modem Specifications DATA MODEM Timing RS 232 Electrical Interface RS 232 Interface Connector 8 pin ODU Data speed of I O interface 300 38400 bps Data speed ...

Page 57: ...ity test 10V m 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 IN 0 16V 1...

Page 58: ... SNAP Style G4 size 1 Antenna Connector The antenna connector is a 50 Ohm TNC Female Table 25 Power Connector PIN NAME EXPLANATION 1 PWR Operation Voltage 9 16 VDC Notesa a Both PWR pins 1 2 must be connected 2 PWR Operation Voltage 9 16 VDC Noteb b Both GND and pins 3 4 must be connected 3 GND Ground Note 4 GND Ground Note ...

Page 59: ...ve 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 CRIT...

Page 60: ...applicable laws rules and regulations This product should never be used in dangerous environments 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 If this product has been dropped altered t...

Page 61: ... 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 102 66 f 145 91 188 BC 231 E7 17 11 DC1 60 3C 103 67 g 146 92 189 BD 232 E8 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 40 107 6B k 150 96 193 C1 236 EC 22 16 SYN 65 41 A 108 6C l 151 97...

Page 62: ... 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 S 126 7E 169 A9 212 D4 255 FF 41 29 84 54 T 127 7F 170 AA 213 D5 42 2A 85 55 U 128 80 171 AB 214 D6 ...

Page 63: ...e 123 ms typical 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 60ms typical RX mode Wakeup time from SLEEP to modem ready triggered by IRQ data when Data in TX input 40ms typical RX TX turnaround wait if RX freq TX frequency 20ms app 40 ms recommended for compatibility prior to other 3AS family members TX TX t...

Page 64: ... 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 Delays are in milliseconds and with a 10 marg...

Page 65: ...on Delays with FEC function Forward Error Correction Delays are in milliseconds and with a 10 margin Figure 16 12 5 kHz Radio Channel with Error Correction Table 28 Number of Bytes Sent Bps 1 10 100 500 1200 52 49 48 50 4800 45 45 44 44 9600 44 44 68 121 19200 44 44 104 360 38400 48 48 132 496 ...

Page 66: ...Radio Channel Transmission Delays without FEC Function Forward Error Correction Delays are in milliseconds and with a 10 margin Figure 17 25 kHz Radio Channel without Error Correction Table 29 Number of Bytes Sent Bps 1 10 100 500 1200 30 30 18 16 4800 23 23 21 12 9600 23 23 21 17 19200 22 22 22 19 38400 22 22 38 102 ...

Page 67: ...ssion Delays with FEC Function Forward Error Correction Delays are in milliseconds and with a 10 margin Figure 18 25 kHz Radio Channel with Error Correction Table 30 Number of Bytes Sent Bps 1 10 100 500 1200 35 34 29 30 4800 28 28 27 23 9600 28 28 28 23 19200 28 28 36 64 38400 27 27 58 185 ...

Page 68: ...t 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 Figure 19 TRU Modem Managing Terminal Mode It is highly recommended to use TRU or SRL 35 display to change the radio settings Changing parameters...

Page 69: ...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 Figure 21 Program Menu 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 pressin...

Page 70: ...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 bi...

Page 71: ...ange them 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 Enter selection or ESC to previous menu 2 Radio TX frequency setup TX frequency 468 52500 MHz RX frequency 437 00000 MHz Lowe...

Page 72: ...election 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 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...

Page 73: ...e 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 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...

Page 74: ... or not 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 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...

Page 75: ...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 ...

Page 76: ...l 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 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 ...

Page 77: ...ort 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 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 ...

Page 78: ...ial port 1 parity bits 1 None parity 2 Even Parity 3 Odd Parity 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...

Page 79: ...Hz 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 parit...

Page 80: ...o 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 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 Ente...

Page 81: ... 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 b...

Page 82: ... 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 Additional setup Toggle ON OFF values Curr...

Page 83: ...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 bef...

Page 84: ...ommand SL FR nnn nnnnn Set RX frequency to nnn nnnnn MHz 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 n...

Page 85: ...eive address RX1 response xxxx 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 r...

Page 86: ... 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 ...

Page 87: ...re 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 Response is OK at the original baud rate 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 ...

Page 88: ...dem 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 author...

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