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Appendix D.  Fundamentals of Radiotelemetry

D-4

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Содержание csi mAXON

Страница 1: ...INSTRUCTION MANUAL CSI Maxon Radiotelemetry Network Revision 4 03 C o p y r i g h t c 1 9 8 9 2 0 0 3 C a m p b e l l S c i e n t i f i c I n c...

Страница 2: ...l other warranties expressed or implied including warranties of merchantability or fitness for a particular purpose CAMPBELL SCIENTIFIC INC is not liable for special indirect incidental or consequenti...

Страница 3: ...ts 2 7 2 5 1 Troubleshooting Physical Link Between Base and Field Station2 7 2 5 2 Error Messages 2 7 2 5 3 Troubleshooting with the Terminal Emulator 2 9 3 Radiotelemetry Network Components 3 1 3 1 R...

Страница 4: ...1 B 2 Phone to RF Base Station B 1 B 3 Phone to RF Base Station with Measurement Capability B 4 C Power Calculations C 1 D Fundamentals of Radiotelemetry D 1 D 1 Radio Waves D 1 D 2 Antennas D 2 D 3...

Страница 5: ...on B 4 B 2 Phone to RF Base Station B 7 B 3 Phone to RF Base Station with Measurement Capability B 7 Tables 3 1 The RF310M Modem 3 2 3 2 RF310M Command Character Summary 3 5 3 3 Summary of the Shutdow...

Страница 6: ...CSI Maxon Radiotelemetry Network Table of Contents This is a blank page iv...

Страница 7: ...The requirements specific to a RF telemetry network include The distance between radio stations should not be greater than approximately 25 miles The stations should not have major obstacles between t...

Страница 8: ...datalogger resides at this station taking the desired measurements Any field station can also operate as a repeater The only requirement is that the station s antenna must be able to communicate in a...

Страница 9: ...computer to collect data from the field station s Normally all communication to the field stations originate at the base station Data retrieval remote programming and system analysis can all be done...

Страница 10: ...8W To Antenna RS232 Cable CARRIER DETECT RF310B RF BASE STATION POWER ON MADE IN U S A FIGURE 1 3 An RF Telemetry Base Station 1 4 Repeater Purpose To act as relay between two communicating stations s...

Страница 11: ...Section 1 General Radiotelemetry Network 1 5 PS512M RF310 RF310M FIGURE 1 4 A Typical RF Telemetry Repeater Station...

Страница 12: ...Section 1 General Radiotelemetry Network 1 6 This is a blank page...

Страница 13: ...station as 254 Label the remaining stations with different ID numbers Later each modem will be set with the corresponding ID number The Station ID similar to a phone number allows the base station to...

Страница 14: ...r you will need to install it Refer to the PC208W Manual if you have questions about the installation procedure or PC208W PC208W will refer to the RF310M as either RF Modem or RF95 There are eight mai...

Страница 15: ...o RF modem The default COM port settings should not be changed The RF modem default settings do not need to be changed The default datalogger settings do not need changing except for the Dialed using...

Страница 16: ...ort If your computer uses COM2 click the Add COM port button to add an RS 232 communications port Next click the Add Device button When the Add Device button is clicked the Add New Device dialog box o...

Страница 17: ...attached to RS 232 communication port 2 Next use the Add Device button again to connect the datalogger to RF1 This window shows the CR10X datalogger connected to the RF modem Notice the Dialed Using R...

Страница 18: ...tion link An RF link can also be tested at the field site with a portable base station hardware requirements for the portable base station are described in Appendix B Testing begins with turning the R...

Страница 19: ...ing inside a building 3 Damaged or shorted cables 4 Bad or improper connections 5 Antenna frequency does not match the radio frequency 6 Base and field station radios aren t using same frequency 7 Dat...

Страница 20: ...ios plugged in to the RF modems 2 Are the radios connected to power 3 Verify that nothing but an RF modem is connected to the datalogger s 9 pin connector 4 Are Station IDs set properly in the RF Mode...

Страница 21: ...ion s RF modem and the computer This baud rate can be set at 300 1200 or 9600 baud The RF310M will detect the computer s baud rate and match it RESPONSE IF SUCCESSFUL prompt given SOL modem is now in...

Страница 22: ...aud rate between RF Modem and Datalogger by slowly pressing ENTER a few times Pause about 2 seconds between each press of the enter key RESPONSE IF SUCCESSFUL from datalogger The Asterisk prompt indic...

Страница 23: ...2 RF310M States The RF310M Modem operates in one of two separate states The RF310M can be utilized in either the RF310M ME Modem Enable state or the RF310M SDC Synchronous Device Communication state...

Страница 24: ...RF base stations The RF310M is shipped with the switch set for the RF310M ME state and station ID of 1 3 1 3 Setting Station ID Each RF310M including the one in the RF base station must have a unique...

Страница 25: ...er about two tenths of a second The Carrier Detect light can also be used to check the RAM Random Access Memory and ROM Read Only Memory of the RF310M With the radio disconnected and the datalogger in...

Страница 26: ...a valid transmission block is received on the RF link The datalogger being in Telecommunications Mode will override the Time out Timer The Local Command Mode is used to set up and shut down an RF lin...

Страница 27: ...Mode is entered after addressing Some explanation is contained in Appendix E RF310M States In the Local Command Mode the SOL modem responds to command characters received from the terminal or computer...

Страница 28: ...mputer screen The datalogger connected to the EOL modem is now in the Telecommunications Mode and will respond to the standard datalogger telecommunications commands If the verification block does not...

Страница 29: ...blocks are subsequently retransmitted The noise level indicators should be 102 70 at the standard 3 0K baud rate or 124 70 at 2 4K baud The noise level indicators are reset and subsequently become ac...

Страница 30: ...3 2 1 Radio Description The RF310 and RF312 radios are compatible with the RF310M RF modem and the RF310B base station The RF310 and RF312 radios differ only in the carrier frequency range The RF310...

Страница 31: ...talling radios 1 Secure the radio and its bracket to the RF310M using screws from the RF310M Modem s lid 2 Connect the 9 pin connector with the red and black power leads coming out of it of the radio...

Страница 32: ...on between RF sites First determine if your antenna is omnidirectional or unidirectional An omnidirectional antenna will transmit receive in a full 360 degree circle Generally an omnidirectional anten...

Страница 33: ...for antennas with male receptacles A Campbell Scientific antenna cable complete with connectors is specified as either COAX NM L or COAX NF L COAX NF L is a coaxial RG 8A U cable with a BNC connector...

Страница 34: ...mounting and housing sensors and other equipment for a station 3 4 1 Tripods and Towers for Mounting For the different mounting requirements Campbell Scientific offers the CM6 Tripod CM10 Tripod UT10...

Страница 35: ...normally required due to the large current drain of the radio 3 4 3 1 Lead Acid Batteries Lead acid batteries are designed to be float charged by a solar panel or AC power source The role of the lead...

Страница 36: ...ore than one battery to the PS12LA Monitor the power supply using datalogger Instruction 10 Users are strongly advised to incorporate this instruction into their data acquisition programs to keep trac...

Страница 37: ...0B 25 pin female port connects to the computer RS 232 port The computer RS 232 port may be either 9 or 25 pin The RF310B s 25 pin port is configured as Data Communications Equipment DCE for direct cab...

Страница 38: ...for RF310B 25 Pin Port Pin I O Description 1 Ground 2 I TX 3 O RX 4 I RTS 20 I DTR 22 O RING TABLE 3 8 RF310B Power Conversions Pins Jumpered Apply AC 110 VAC 1 3 2 4 1 4 120 VAC 1 3 2 4 1 4 220 VAC...

Страница 39: ...Section 3 Radiotelemetry Network Components 3 17 RF310B TOP VIEW FIGURE 3 8 Top View of the RF310B Base Station...

Страница 40: ...Section 3 Radiotelemetry Network Components 3 18 This is a blank page...

Страница 41: ...208W Manual This section gives a brief description of software setup specific RF application notes and data collection methods 4 1 1 Basic Concepts PC208W is designed to use a unique communication pat...

Страница 42: ...mated Data Collection PC208W One feature of PC208W is automated scheduled data collection PC208W can be setup to call each station based on time To setup the scheduler click on the setup button of the...

Страница 43: ...he bottom First select the tools tab then select the datalogger of interest in the Station List Using the mouse click on the Connect button of the Connect Window The computer is communicating with the...

Страница 44: ...nications is used for this purpose Call back is commonly used to initiate data collection under emergency situations e g water level falls below lower limit Call back is not the preferred method for r...

Страница 45: ...0 0000X 46 0111 0100X 89 1001 1010X 4 0010 0000X 47 1111 0100X 90 0101 1010X 5 1010 0000X 48 0000 1100X 91 1101 1010X 6 0110 0000X 49 1000 1100X 92 0011 1010X 7 1110 0000X 50 0100 1100X 93 1011 1010X...

Страница 46: ...00X 71 1110 0010X 114 0100 1110X 29 1011 1000X 72 0001 0010X 115 1100 1110X 30 0111 1000X 73 1001 0010X 116 0010 1110X 31 1111 1000X 74 0101 0010X 117 1010 1110X 32 0000 0100X 75 1101 0010X 118 0110 1...

Страница 47: ...01 0001X 179 1100 1101X 222 0111 1011X 137 1001 0001X 180 0010 1101X 223 1111 1011X 138 0101 0001X 181 1010 1101X 224 0000 0111X 139 1101 0001X 182 0110 1101X 225 1000 0111X 140 0011 0001X 183 1110 11...

Страница 48: ...59 1111 1001X 202 0101 0011X 245 1010 1111X 160 0000 0101X 203 1101 0011X 246 0110 1111X 161 1000 0101X 204 0011 0011X 247 1110 1111X 162 0100 0101X 205 1011 0011X 248 0001 1111X 163 1100 0101X 206 01...

Страница 49: ...32A B 2 Phone to RF Base Station When an RF network is a great distance from the desired place of data collection a phone modem can be used to call the RF base station A computer with PC208W Datalogge...

Страница 50: ...RF Select the proper calling modem from the Modem Pick List The calling modem is connected to the computer Use 9600 baud for the COM200 4800 baud for the COM100 and 1200 baud for the DC112 Phone to R...

Страница 51: ...te needs the Dialed Using RF95 Path set This is the address set in the RF310M RF Modem Phone to RF When a repeater is used the Dialed Using RF95 Path includes the path of the repeater followed by the...

Страница 52: ...ace devices COM Port Phone Modem Datalogger RF Modem and finally each Datalogger field site The Phone number and RF Path must be set The COM200 Phone Modem and the RF310M are connected to and powered...

Страница 53: ...Configurations B 5 The correct calling modem connected to computer should be selected from the Modem Pick List The COM200 uses 9600 baud DC112 uses 1200 COM100 uses 4800 The Base CR10X must have the p...

Страница 54: ...the Dialed Using RF95 Path set This is the same address set in the RF310M RF Modem This window shows a phone to RF base with measurement using a repeater to get to CR10X5 Note the second RF modem conn...

Страница 55: ...Appendix B Alternate Base Station Configurations B 7 RF310M RF310 312 FIGURE B 2 Phone To RF Base Station RF310M RF310 312 FIGURE B 3 Phone To RF Base Station With Measurement Capability...

Страница 56: ...Appendix B Alternate Base Station Configurations B 8 This is a blank page...

Страница 57: ...ximately 0 0000000000003 Watts 3X10 13 which represents 95 dBm Signal Power SP TP AG PL CL where SP Signal Power dBm Power of the signal received TP Transmit Power dBm Rated output power of transmitti...

Страница 58: ...Appendix C Power Calculations C 2 Power Conversion Conversion of Watts to dBm can be done with the following formula dBm 10 Log Watts 0 001...

Страница 59: ...ve or sky wave is used in Campbell Scientific s RF networks Energy is lost from radio waves as they travel away from the transmitting antenna One reason for this is the loss due to dispersion of energ...

Страница 60: ...pattern is important to consider when a RF station is to communicate with more than one other RF station The vertical pattern is the radiating pattern in the upward and downward directions Any two com...

Страница 61: ...e crystal oscillates at a desired frequency which is specific for the carrier frequency The oscillator converts DC power to an AC signal This signal is then amplified modulated with the signal and tra...

Страница 62: ...Appendix D Fundamentals of Radiotelemetry D 4 This is a blank page...

Страница 63: ...de the ME line is high and the RF310M is subsequently in the Transparent Mode or EOL Mode depending on the relative location of the RF310M E 2 RF310M SDC State The RF310M SDC State can be used to enab...

Страница 64: ...he address sent to the RF310M can tell the RF310M to connect to the phone modem which requires the RF310M to switch its TXD and RXD lines Therefore all characters are routed through the phone modem to...

Страница 65: ...ting 40 C to 80 C 30 C to 60 C Current Consumption Standby Muted Transmit 5 Watts RF Power Transmit 1 Watt RF Power 65 mA 2 0 A 1 0 A Frequency Bands VHF RX and TX UHF RX and TX 148 000 174 000 MHz 44...

Страница 66: ...stment 1 kHz Nom Dev 20dB 25 kHz Channel Spacing 12 5 kHz Channel Spacing Min 3 5 Max 6 0 Min 1 5 Max 4 0 Specifications Receiver Sensitivity 12 dB Sinad UHF 117 dBm VHF 118 dbM Nom cond UHF 115 dBm V...

Страница 67: ...S Max Antenna Socket Input Match 10 dB Return Loss L O frequency Temperature Stability 1st 5ppm 2nd 15ppm from 30 to 60 C L O Frequency Aging rate 2ppm year Specifications Reference Crystal Frequency...

Страница 68: ...Appendix F Specifications F 4 This is a blank page...

Страница 69: ...nit of power equal to 10 times the common logarithm of the ratio of two amounts of signal power End of Link Modem An RF modem which is at the field station Field Station The place of origin of the dat...

Страница 70: ...which modulates an electrical signal on the carrier wave and codes all transmissions for a specific path RF Path The designation of an RF link with modem ID Numbers and modem commands RLQA RF Link Qu...

Страница 71: ...y in the range of 130 to 174 MHz VSWR Voltage Standing Wave Ratio The ratio of the standing wave voltage across the RF transmission cable at the high voltage points to that at the low voltage points U...

Страница 72: ...Glossary d This is a blank page...

Страница 73: ...This is a blank page...

Страница 74: ...campbellsci com br suporte campbellsci com br Campbell Scientific Canada Corp CSC 11564 149th Street NW Edmonton Alberta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientifi...

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