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SATELLINE-3AS and SATELLINE-3ASd

21

5.3.2

 

Error Correction

SATELLINE-3AS offers the possibility to use Forward Error Correction (FEC), that can be set in the

SETUP mode. If set, the SATELLINE-3AS adds extra FEC information to the data packets on the
radio channel. The extra symbols give protection over noisy radio channels.

FEC should be used when the distances are long and if the radio channel has a lot of
interference.

FEC increases transmission delay by 30 percent.

For the exact delays refer to the table in appendix A.

Summary of Contents for SATELLINE-3AS VHF YM5000

Page 1: ...e information relied on is current SATEL s software is provided as is All warranties and representations of any kind with regard to the software are hereby disclaimed including the implied warranties...

Page 2: ...9 5 1 RS Interface 9 5 1 1 D15 Connector 9 5 1 1 1 Pin configuration 10 5 1 1 2 RS 232 Interface 11 5 1 1 3 RS 422 Interface 12 5 1 1 4 RS 485 Interface 12 5 1 1 5 Termination 12 5 1 1 6 RSSI indicato...

Page 3: ...37 6 2 7 Contrast 37 6 3 Changing the settings using SL commands 38 6 3 1 Frequency 38 6 3 2 Addressing 39 6 3 3 Special functions 39 6 3 4 Forming of the SL Command 40 7 INSTALLATION 42 7 1 The insta...

Page 4: ...s 53 11 3 Antennas 53 11 4 Power Supplies 53 11 5 Filters 54 11 6 Battery Pack 54 11 7 Power Booster 54 12 APPENDIX A 55 13 APPENDIX B 56 13 1 Functional delays 56 13 2 Transmission delays 56 13 2 1 T...

Page 5: ...lised in the SETUP mode for example during the implementation stage Thanks to the display it is possible to change the settings of the radio modem in the field without using an external terminal It ca...

Page 6: ...for any illegal use of its radio equipment The equipment described in this manual and technical description are only to be operated as instructed in this manual Correct and safe operation of this equ...

Page 7: ...r Stability Adjacent Channel Power Spurious Radiations 10 mW 1 W 50 ohm 2 dB 3 dB according to ETS 300 220 ETS 300 113 according to ETS 300 220 ETS 300 113 RADIO RECEIVER PART Sensitivity Co channel R...

Page 8: ...least 1 A Also connect the DTR pin to a positive voltage If the DTR pin is not connected the radio modem is in the STAND BY mode and will not transmit or receive data As a terminal program you can use...

Page 9: ...issions and EMC regulations The user should therefore not need to take any further precautions against emissions out of the radio modem The radio modem has two RS ports COM1 and COM2 Port COM1 has RS...

Page 10: ...ptional 7 SGND Signal Ground 9 OUT RD Receive Data 10 OUT DSR Optional 11 IN TD Transmit Data 13 IN RTS Optional COM2 RS 232 2 OUT CD Optional 3 OUT RD Receive Data 4 IN TD Transmit Data 5 OUT RSSI Op...

Page 11: ...nnel DTR Data Terminal Ready when connected to the operating voltage Vb the radio modem is ON when not connected NC the radio modem is in the STAND BY mode MODE selects the DATA mode if not connected...

Page 12: ...n the RS 422 standard by increasing the number of devices you can use from 10 to 32 and by working with Half duplex bus architectures Only one pair of cables is needed compared to the two pairs needed...

Page 13: ...he approximate determination of the signal level In the following figure is the typical voltage level as a function of the signal level Notice that voltage drops with a good signal level 25dB This occ...

Page 14: ...ier level Active Inactive RTS indicates the state of the pin 13 The data terminal equipment DTE usually enables RTS when it is ready to receive data By default the DTE enables RTS to active CTS indica...

Page 15: ...pendent of the RS line bitrate If the RS line bitrate is slower or faster than the radio channel bitrate the radio modem buffers the data temporarily so it will not be lost OUTPUT POWER mW OUTPUT POWE...

Page 16: ...s of the radio modem without using an external terminal The display units back light is activated by pushing any of the buttons Display in the DATA MODE 468 2000 MHz COM1 19200N81 Setup Display showin...

Page 17: ...in the data an even even parity or an odd odd parity Note that the parity bit itself is included in the count but the stop bit or stop bits are excluded The whole character length includes start bit...

Page 18: ...dem and the data terminal equipment DTE CTS is used by the radio modem on the sending end of a transmission When the radio modem is ready to receive data it changes the state of the CTS signal to acti...

Page 19: ...th is 1 kB kiloByte with a repeater in normal use it is not constrained ADD H ADD L DATA For example address 1234h 4660 decimal where 12 is ADD H and 34 is ADD L For another example ABFFh 44031 decima...

Page 20: ...t from the address of the received data message Radio modem will prevent data packet from being transferred to the data line Data Data Data Address Data Address Data E R R O R Fig 5 Address of recepti...

Page 21: ...P mode If set the SATELLINE 3AS adds extra FEC information to the data packets on the radio channel The extra symbols give protection over noisy radio channels FEC should be used when the distances ar...

Page 22: ...n the RS line the same way as usually However at the same time it saves temporarily the received data After finishing the reception of data the radio modem does not turn back to the state where it obs...

Page 23: ...D S ADD DATA the message from the master station terminal that contains the addresses of the repeater stations R1 ADD R2 ADD and the substation S ADD Every address is two characters long R2 ADD S ADD...

Page 24: ...llation When you turn the test on the radio modem starts sending test messages until the test is turned off Short block When this mode is turned on the radio modem transmits every second a 52 characte...

Page 25: ...g the settings using terminal Connect the radio modem to a terminal or a PC that is in terminal mode use for example SaTerm or Windows Hyper Terminal program Check the correct wiring of the cable from...

Page 26: ...Esc to cancel 433 5000 The channel can be selected within 1 MHz tuning range from the factory set center frequency The center frequency is set at the factory and cannot be changed The channel is given...

Page 27: ...10 mW 2 Set 20 mW 3 Set 50 mW 4 Set 100 mW 5 Set 200 mW 6 Set 500 mW 7 Set 1000 mW Enter selection or Esc to cancel 6 OK Enter selection or Esc to cancel 2 Sensitivity setup RX Sensitivity level 110...

Page 28: ...ress setup RX Address 0000 Enter new address HEX or Esc to cancel 1234 OK Enter selection or Esc to cancel 2 RX address setup RX Address 0000 Enter new address HEX or Esc to cancel 1234 OK Enter selec...

Page 29: ...p bit Enter selection or Esc to cancel 1 Serial ports 1 and 2 Status setup 1 Port 1 ON Port 2 OFF 2 Port 1 OFF Port 2 ON Enter selection or Esc to cancel 1 Enter selection or Esc to cancel 2 Serial po...

Page 30: ...election 6 Additional setup Error Correction OFF Repeater Function OFF SL commands OFF 1 Set Error Correction ON 2 Set Repeater Function ON 3 Set SL Commands ON Enter selection or Esc to cancel 1 Ente...

Page 31: ...ll Tests OFF Enter selection or Esc to cancel 1 Enter selection or Esc to cancel 2 Enter selection or Esc to cancel 3 Use tests when needed as described in corresponding chapter 6 1 7 Restoring factor...

Page 32: ...modem goes into SETUP MODE if SETUP y button has been pressed This is the DATA mode display PORT 1 is on with settings 19200 N 8 1 468 2000 MHz COM1 19200N81 Setup After the SETUP button has been pres...

Page 33: ...Next You can exit at any time with Change Press or until the current value of the digit is correct Press next to move to next digit CF 468 2000 MHz 468 2000 MHz CANCEL next Repeat 4 times Press or unt...

Page 34: ...r TX address pressing or and then pressing Change RX addr OFF TX addr OFF CANCEL Change Press or until the value of the first digit of the address is correct Press next to move to next digit RX Addres...

Page 35: ...t value and then press set Note The cursor position initially indicates the current setting 300 bit s 600 bit s 1200 bit s 2400 bit s 4800 bit s 9600 bit s 19200 bit s 38400 bit s CANCEL SET Number of...

Page 36: ...to the parameter you wish to change and press Change to toggle the status Error Corr ON Repeater OFF SL commandsOFF CANCEL Change 6 2 5 Tests Press Select RF frequency Addressing Port 1 Port 2 Additio...

Page 37: ...tings for parameters Do you want to restore factory settings No YES 6 2 7 Contrast Press Select RF frequency Addressing Port 1 Port 2 Additional Test Factory setup Contrast CANCEL Select Press Change...

Page 38: ...ram Freq CenterFreq xx ChanSpace where xx 00 99 SLLxx Write ram Freq CenterFreq xx ChanSpace where xx 00 99 SL N CR Show ram Freq CenterFreq ChanSpace SL nn CR Write ram Freq CenterFreq nn ChanSpace w...

Page 39: ...xxxx where x 0 9 A F SL T CR Show ram Tid SL T xxxx CR Write ram TId xxxx where x 0 9 A F SL T xxxx CR Show ram TId xxxx where x 0 9 A F SL R CR Write eeprom Rid SL R xxxx CR Write ram RId xxxx where...

Page 40: ...use e g address 2B5A hex start by converting the hex value to characters This can be done by using a map of characters to convert the numbers Appendix1 The following character map is for character se...

Page 41: ...key together with a numeric pad Use a simple DOS editor Press ALT key use the numeric pad to enter the decimal value 3 numbers e g 10 010 and release ALT key e g Hex address typing of the correspondi...

Page 42: ...k side of the radio modem The installation plate can be mounted using the holes provided on installation plate 2 By using the Velcro tape supplied with the radio modem 3 By mounting the radio modem di...

Page 43: ...the power cables to a power supply with a power rating of at least 1 A The operating voltage of the positive pole of the D 15 connector is connected to the pin 15 of the D connector and to the negativ...

Page 44: ...5 8 Vb GND RADIO MODEM FUSE 630 mA slow TD RD RTS CTS CD 2 3 4 5 7 8 25 PIN D CONNECTOR DTR 20 DSR 6 SGND TD RD RTS CTS CD 2 3 5 1 7 8 9 PIN D CONNECTOR DTR 4 DSR 6 SGND DSR 10 PORT COM2 RS232 PORT CO...

Page 45: ...and the negative data line However this is not complimentary with short line lengths 1 10 meters depending on the cable and the bitrate 7 2 4 Power supply The range of voltage is 9 30 VDC Connect the...

Page 46: ...he antenna truck bonnet or roof In weak conditions a 1 2 wave antenna is the most suitable It can be mounted at the top of a pipe as this provides it with as much open space as possible In places wher...

Page 47: ...tself When mounting the antenna pay also attention to possible sources of interference such as mobile phone network base stations local telephone network base stations television transmitters radio li...

Page 48: ...nerally 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 A horizontal polarization...

Page 49: ...nal Data Terminal 1 n pcs 1 n pcs RS 232 RS 232 1 15 m 1 15 m 5 m 5 m G 12 dBi G 12 dBi lowloss cable lowloss cable up to 15 km up to 30 km Example of an antenna installation By use of amplifying ante...

Page 50: ...the use of amplifying antennas Frequent topographical variations over long distances may require that at least one of the antennas needs to be raised to a height of 10 to 20 m As the placement of the...

Page 51: ...though it will still be reduced by distance It must also be remembered that one open space has different environmental and external factors to another and that the affects on transmission quality must...

Page 52: ...on a strongly vibrating surface Do not place the modem in direct sun light or high humidity 3 The capacity and stability of the power supply must be secured so that the current required by the transm...

Page 53: ...itch 11 2 11 2 RF Cables RF Cables Type Description Lenght Notice CRF 1 cable TNCm TNCf connectors 1 m RG58 3 dB 10 m CRF 5F cable TNCm TNCf connectors 5 m RG58 3 dB 10 m CRF 5M cable TNCm TNCm connec...

Page 54: ...na Satel customer support helps you to specify a suitable filter for your application 11 6 11 6 Battery Pack Battery Pack Type Description SATELSET 60 Battery Pack with 60 mm Belt Clip SATELSET 90 Bat...

Page 55: ...3D 104 68 h 147 93 190 BE 233 E9 19 13 62 3E 105 69 i 148 94 191 BF 234 EA 20 14 63 3F 106 6A j 149 95 192 C0 235 EB 21 15 64 40 107 6B k 150 96 193 C1 236 EC 22 16 65 41 A 108 6C l 151 97 194 C2 237...

Page 56: ...DTR STAND BY ON 1500 RS interface turnaround time RS 232 0 RS interface turnaround time RS 485 1 Intercharacter delay max 2 3 characters 13 2 13 2 Transmission delays Transmission delays Delay from t...

Page 57: ...er of Bytes sent Number of Bytes sent Bps Bps 1 1 10 10 100 100 500 500 1200 1200 43 83 87 100 4800 4800 32 32 35 37 9600 9600 31 30 30 31 19200 19200 30 33 65 196 38400 38400 30 35 88 322 Delay in mi...

Page 58: ...tes sent Bps Bps 1 1 10 10 100 100 500 500 1200 1200 63 120 120 200 4800 4800 43 54 70 72 9600 9600 42 42 80 140 19200 19200 42 42 105 364 38400 38400 42 42 128 490 Delays in milliseconds with 10 marg...

Page 59: ...Number of Bytes sent Number of Bytes sent Bps Bps 1 1 10 10 100 100 500 500 1200 1200 36 76 78 83 4800 4800 22 26 27 28 9600 9600 20 20 20 21 19200 19200 20 20 20 20 38400 38400 20 21 36 102 Delay in...

Page 60: ...s sent Bps Bps 1 1 10 10 100 100 500 500 1200 1200 54 88 95 102 4800 4800 27 41 44 46 9600 9600 26 26 36 37 19200 19200 26 26 39 70 38400 38400 26 26 57 186 Delays in milliseconds with 10 margin 25 kH...

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