Campbell RTMS SYSTEMS Instruction Manual Download Page 29

A-1

APPENDIX A.  SETTING THE STATION ID

Each RF modem has nine dip switches; the first eight must be set for a particular Station ID.  Following
is a list of all possible Station IDs with the corresponding setting of the dip switches.  Here, 1 represents
open, 0 is closed, and Switch 9 should be open.

SWITCHES

SWITCHES

SWITCHES

ID

1234

56789

ID

1234

56789

ID

1234

56789

43

1101

0100X

86

0110

1010X

1

1000

0000X

44

0011

0100X

87

1110

1010X

2

0100

0000X

45

1011

0100X

88

0001

1010X

3

1100

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

8

0001

0000X

51

1100

1100X

94

0111

1010X

9

1001

0000X

52

0010

1100X

95

1111

1010X

10

0101

0000X

53

1010

1100X

96

0000

0110X

11

1101

0000X

54

0110

1100X

97

1000

0110X

12

0011

0000X

55

1110

1100X

98

0100

0110X

13

1011

0000X

56

0001

1100X

99

1100

0110X

14

0111

0000X

57

1001

1100X

100

0010

0110X

15

1111

0000X

58

0101

1100X

101

1010

0110X

16

0000

1000X

59

1101

1100X

102

0110

0110X

17

1000

1000X

60

0011

1100X

103

1110

0110X

18

0100

1000X

61

1011

1100X

104

0001

0110X

19

1100

1000X

62

0111

1100X

105

1001

0110X

20

0010

1000X

63

1111

1100X

106

0101

0110X

21

1010

1000X

64

0000

0010X

107

1101

0110X

22

0110

1000X

65

1000

0010X

108

0011

0110X

23

1110

1000X

66

0100

0010X

109

1011

0110X

24

0001

1000X

67

1100

0010X

110

0111

0110X

25

1001

1000X

68

0010

0010X

111

1111

0110X

26

0101

1000X

69

1010

0010X

112

0000

1110X

27

1101

1000X

70

0110

0010X

113

1000

1110X

28

0011

1000X

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

1110X

33

1000

0100X

76

0011

0010X

119

1110

1110X

34

0100

0100X

77

1011

0010X

120

0001

1110X

35

1100

0100X

78

0111

0010X

121

1001

1110X

36

0010

0100X

79

1111

0010X

122

0101

1110X

37

1010

0100X

80

0000

1010X

123

1101

1110X

38

0110

0100X

81

1000

1010X

124

0011

1110X

39

1110

0100X

82

0100

1010X

125

1011

1110X

40

0001

0100X

83

1100

1010X

126

0111

1110X

Summary of Contents for RTMS SYSTEMS

Page 1: ...RF FOR RTMS SYSTEMS INSTRUCTION MANUAL REVISION 3 95 COPYRIGHT c 1995 CAMPBELL SCIENTIFIC INC...

Page 2: ...ntability or fitness for a particular purpose CAMPBELL SCIENTIFIC INC is not liable for special indirect incidental or consequential damages Products may not be returned without prior authorization To...

Page 3: ...ttempts 2 3 2 6 Adding Stations to the Net Description 2 4 2 7 Radio Test Results 2 4 SECTION 3 RADIOTELEMETRY NETWORK COMPONENTS 3 1 The RF95T Modem 3 1 3 2 RF100 RF200 Radios 3 4 3 3 Antennas and Ca...

Page 4: ...rams and displaying current readings from the datalogger The requirements specific to a radiotelemetry network include The distance between radio stations should not be greater than approximately 25 m...

Page 5: ...ing 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 all desired directions This may require...

Page 6: ...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 from the base station Equipmen...

Page 7: ...too long of a distance or an obstacle which impedes direct communication A repeater is not always required in a radiotelemetry network A field station can also function as a repeater Equipment Requir...

Page 8: ...e radio directly onto the bottom of the RF232T Secure the BNC connector from the radio s cable to its hole on the back of the RF232T See Figure 3 7 for assistance 3 Connect the radio to 12 V ground an...

Page 9: ...ast type of message about this station If the site is black no communication has been attempted yet If the site is red or blue than a warning or fault message has occurred If the site is green success...

Page 10: ...H SETTING box Separate the ids with a space When the BEGIN button is selected the entire link will be tested The signature of the remote site will still be returned An additional row of quality number...

Page 11: ...made 2 6 1 NETWORK HEALTH DISPLAY AND ERROR WARNING AND STATUS MESSAGES As remote sites are added to the network description they also appear on the network health display NetAdmin main screen The col...

Page 12: ...ough and will be retransmitted at a smaller size Over RF data is transferred as a stream of bits encoded into short and long periods of time between transitions We call the short time a 1T period and...

Page 13: ...d The following capabilities are important when using RTMS CR10T and RF95T modems A maximum depth of four repeaters can be used 150 is maximum number of remote RF95T CR10T site that may be used with a...

Page 14: ...Station ID 3 1 4 THE CARRIER DETECT LIGHT The Carrier Detect Light on the front panel of the RF95T has several purposes The primary function of the light is to indicate when data is being received or...

Page 15: ...e or last common repeater sending a single short broadcast to all remotes in the affected area Each remote RF95T upon receiving the broadcast checks the local datalogger for any computer bound packets...

Page 16: ...ed 9 TXD Received by RF95T 3 1 9 RF95T CURRENT DRAIN Quiescent 1 4 mA Wait 3 4 mA Active 30 mA Waiting to respond to broadcast Usually the radio current drain is the relevant factor in battery power c...

Page 17: ...he following steps will install a radio for a field or repeater station 1 Secure the radio and its bracket using the four screws from the RF95T Modem s lid 2 Connect the 10 pin connector with the red...

Page 18: ...TORS The most common cable type to connect a radio to the antenna is a coaxial RG 8A U cable Two connectors are required for each length of cable The connector for the radio is a BNC type connector Th...

Page 19: ...ort 3 4 2 ENCLOSURES Enclosures are needed to keep water and debris from damaging the data acquisition equipment Campbell Scientific Inc enclosures are designated as raintight and are designed to moun...

Page 20: ...to drop voltage and the other to raise voltage Alkaline batteries connected to the external port would be charged by the charging source which can cause an explosion CAUTION Do not use the external po...

Page 21: ...230 or 240 VAC if a small wiring modification is done 1 First disconnect any AC power 2 Lift the cover off the RF232 and locate the power supply P N 4918 as shown in Figure 3 8 3 Unscrew the four Phil...

Page 22: ...SECTION 3 RADIOTELEMETRY NETWORK COMPONENTS 3 10 FIGURE 3 8 Top View of the RF232T Base Station...

Page 23: ...until another description is made active even if RTMS is completely stopped If alternative communication paths exist i e a backup repeater in case the main repeater fails network descriptions utilizin...

Page 24: ...hould be large enough to accommodate the initial attempt and some retries 4 1 1 3 NETWORK HEALTH AND STATUS WARNING FAULT MESSAGES The RF specific messages are described in Section 2 6 1 of this manua...

Page 25: ...only be used with one site at a time and is not intended for unattended use While it is possible to have a station communicating with RTMS and GraphTerm at the same time more predictable behavior is e...

Page 26: ...er that is set with the switches in the RF95T The PATH parameter is the station number of the RFBase see above STATION NO followed by a colon As with the datalogger if the NetAdmin NBR parameter for t...

Page 27: ...The datalogger flags and ports may also be toggled Values can also be directly loaded into Input Locations Data can be collected for archiving while monitoring GraphTerm also supports the display of...

Page 28: ...ater or field site for single links Multiple site links may be tested by preceding the remote station ID with station ID from sites to be used as repeaters Separate the station ID numbers with commas...

Page 29: ...1001 1100X 100 0010 0110X 15 1111 0000X 58 0101 1100X 101 1010 0110X 16 0000 1000X 59 1101 1100X 102 0110 0110X 17 1000 1000X 60 0011 1100X 103 1110 0110X 18 0100 1000X 61 1011 1100X 104 0001 0110X 19...

Page 30: ...10 0111X 146 0100 1001X 189 1011 1101X 232 0001 0111X 147 1100 1001X 190 0111 1101X 233 1001 0111X 148 0010 1001X 191 1111 1101X 234 0101 0111X 149 1010 1001X 192 0000 0011X 235 1101 0111X 150 0110 10...

Page 31: ...the cable The two leads on the SC532 should be stripped and tinned for connection to a battery Most laptops have a 9 pin RS232 port so a 9 to 25 pin RS232 cable is needed to connect the computer to t...

Page 32: ...ts 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 transmitting radio PL Path Loss dB Power lost over the distance...

Page 33: ...e frequency the stronger the radiation field However at higher frequencies more energy is absorbed by the surface The VHF and UHF frequencies can travel only a short distance between radio stations Th...

Page 34: ...er at the computer is responsible for naming the desired communication path with a setup string This setup string contains any repeater modem IDs and the destination modem ID in sequence After sending...

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