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Campbell TX312 Instruction Manual

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TX312 Transmitter
Revision: 12/10
C o p y r i g h t
©
2 0 0 0 - 2 0 1 0
C a m p b e l l
S c i e n t i f i c ,
I n c .

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  • Page 1 TX312 Transmitter Revision: 12/10 C o p y r i g h t © 2 0 0 0 - 2 0 1 0 C a m p b e l l S c i e n t i f i c ,...
  • Page 2 Warranty and Assistance The TX312 TRANSMITTER is warranted by Campbell Scientific, Inc. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. Campbell Scientific, Inc.'s obligation under this warranty is limited to repairing or replacing (at Campbell Scientific, Inc.'s...

  • Page 3: Table Of Contents

    4.3.11 Random Randomizing Percentage ..........11 4.3.12 Random Repeat Count ..............11 4.3.13 Random Data Format ..............11 4.3.14 Random Msg Counter ..............11 4.4 Save and Transfer the Settings to the TX312..........11 4.5 Using SatCommand for TX312 Testing ..........12 4.5.1 Terminal Window .................12 4.5.2 Commands ..................12 4.5.2.1 Recall Configuration Settings..........12...
  • Page 4 5.2.4.1 Buffer Control..............27 5.2.4.2 Data Format ................ 27 5.2.4.3 P126 Result Codes.............. 27 5.2.5 Read Status and Diagnostic Information from the TX312 ... 28 5.2.5.1 P127, Command 0: Read Time.......... 29 5.2.5.2 P127, Command 1: Read Status......... 29 5.2.5.3 P127, Command 2: Read Last Message Status....30 5.2.5.4 P127, Command 3: Transmit Random Message....
  • Page 5 TX312 Transmitter Table of Contents 5.2.5.6 P127, Command 5: Clear TX312 Error Registers ....32 5.2.5.7 P127, Command 6: Return TX312 to on-line mode...32 5.2.6 Edog Programming Examples............32 6. Field Installation ............35 6.1 Field Site Requirements................35 6.2 Transmission Antenna ................35 6.3 GPS Antenna ..................36...
  • Page 6 5.1-1. GoesStatus Command 0: Read Time ..........18 5.1-2. GoesStatus Command 1: Read Status..........18 5.1-3. GoesStatus Command 2: Read Last Message Status ......19 5.1-4. GoesStatus Command 4: Read TX312 Error Registers ....19 5.1-5. Error Codes..................20 5.1-6. Result Codes Indicating Communication Problems ......23 5.1-7.

  • Page 7: Introduction

    The TX312 utilizes non-volatile memory to store configuration information, such as platform ID, transmission baud rate, channel number, scheduled transmission time, offset time and message window length. The TX312 also has a 15.7 K byte RAM buffer for scheduled transmissions and a buffer for random transmissions.
  • Page 8 Signal Levels: RS-232C; Connector: DB9F; Command protocols: ASCII, Binary, Field diagnostics, Dataloggers with RS-232 port CS I/O port: Signal Levels: TTL, Connector DB9M; Command Protocol: Campbell Scientific Synchronous Device Communication, Binary Command, Campbell Scientific Dataloggers. SDI-12 Port: Multiplexed with CS I/O port. Protocol SDI-12 Recorder version 1.3...

  • Page 9: Goes System

    TX312. 2.3 Data Retrieval Data retrieval via the TX312 and the GOES system is illustrated in Figure 2-1. The DAPS User Interface Manual, provided by NOAA/ NESDIS, describes the process of retrieving the data from the NESDIS ground station. The data are in the form of 3-byte ASCII (see Appendix B for a computer program that converts the data to decimal).

  • Page 10: Tx312 Functions

    3. TX312 Functions 3.1 LED Function The TX312 has four LEDs used to indicate the state of the TX312 transmitter. When power is first applied to the TX312, the four LEDs will cycle through quickly, then the Synchronizing Clock to GPS LED will light for 15 minutes.

  • Page 11: Diagnostics Switch

    Only one device can be active at a time. This SDC port will allow the TX312 transmitter, the RF95A RF modem and a phone modem to be connected to the CSI datalogger serial port all at the same time.

  • Page 12: Rf Connectors

    The TX312 power connector has two pins: ground and 12 V. The input power requirement is 10.8 to 16 VDC at 3 amps. Because the TX312 can use up to 3 amps, the power should be connected directly to the battery. An in-line 7 amp fast blow fuse can be used to help protect the transmitter.

  • Page 13: Tx312 Label

    A five-foot power lead is a long power lead. If you must have a longer lead, use heavy wire. For power leads less than ten feet but more than five feet, use no smaller than 18 AWG. FIGURE 3-1. TX312 Label...

  • Page 14: Tx312 Connectors

    TX312 Transmitter FIGURE 3-2. TX312 Connectors FIGURE 3-3. DCP Enclosure...

  • Page 15: Satcommand Software

    When SatCommand is first started, a default setup template is loaded. If the Retrieve Settings button is selected, the current configuration of the TX312 will be loaded to the fields of the edit window.

  • Page 16: Timed Bit Rate

    4.3.5 First Timed Transmission The First Timed Transmission is also referred to as the Offset. The first timed transmission will always be between zero and the timed interval. The TX312 will transmit on the next Timed Interval after the clock has been set.

  • Page 17: Random Bit Rate

    Using a standard RS-232 serial cable, connect the Computer RS-232 serial port to the TX312 RS-232 serial port. Apply 12 volts DC to the Power terminal. Test the communications link by typing the enter key with the cursor in the Terminal window.

  • Page 18: Using Satcommand For Tx312 Testing

    To use the terminal window, use a standard serial cable to connect the serial port of the computer to the RS-232 port of the TX312. SatCommand can be used to send data to the transmitter, read the Audit Log, GPS Status, etc. The Terminal window supports manually-entered commands (see the appendix for individual command).

  • Page 19: Read Audit Log

    TX312 Transmitter 4.5.2.5 Read Audit Log The Read Audit Log will display a history of the transmitter operation. The latest entry in the audit log is shown at the top of the screen. The audit log will record any error condition that has occurred in the past, plus other events.

  • Page 20: Show Defaults

    5.1.1 GoesData The GoesData instruction is used to send data from the datalogger to the TX312 transmitter. Each time GoesData is executed, data is ordered with the newest data to be transmitted first, which is opposite of how Edlog dataloggers arrange data.

  • Page 21: Buffer Control

    Data Format is used to determine what format the data is transmitted in. This is the format of the data sent over the satellite. The TX312 does not determine the actual data format used, but can be set to match for data format selected with the GoesData instruction.

  • Page 22: Goesdata() Example

    The order data appears in each transmission can be controlled. Only whole records are copied from the datalogger to the TX312. Each record is copied in the same order it appears in the datalogger memory. The order of data records, oldest to newest or newest to oldest, can be controlled.

  • Page 23: Goesstatus

    NextScan EndProg 5.1.2 GoesStatus The GoesStatus instruction is used to read information from the TX312. Information that can be read and stored in the datalogger includes information relating to the next transmission, the last transmission, GPS time and position, and all logged errors. The status information can be used to set the datalogger clock and troubleshoot any problems that might arise.

  • Page 24: Goesstatus Read Status

    TX312 Transmitter reading the time from the TX312. The array needs to be four elements or more. Data is returned as: Result Code, Hour, Minute, Second. TABLE 5.1-1. GoesStatus Command 0: Read Time Index Contents Command Result Code Hours (GMT)

  • Page 25: Goesstatus Read Error Register

    When the command that caused the error is listed as 31, the error is an internal fault. Otherwise the error is just a communication error. TABLE 5.1-4. GoesStatus Command 4: Read TX312 Error Registers Index Contents...

  • Page 26: Error Codes

    Internal fault codes are stored. When the command that failed is listed as 31 (0x1F), the error condition is an internal error with the TX312. The datalogger receives the error code as a hex value and converts to decimal. Decimal values are placed in input locations.

  • Page 27: Goesgps

    Error code 20 (0x14) is the Failsafe error. The failsafe is an internal hardware circuit that will shut down the TX312 if it transmits too frequently or for too long. The failsafe error code is not logged until the transmitter tries to transmit after the failsafe has been tripped.

  • Page 28: Goessetup

    Using GoesSetup(), the custom display menu options and the datalogger keypad/display, programs can be written that allow TX312 configuration via simple menus on the keypad/display. See CRBasic help and Display Menu for details. GoesSetup can also be used with constant values allowing fixed goes configuration parameters to be stored in the datalogger, and executed when needed.

  • Page 29: Result Code

    TX312 Transmitter 5.1.4.1 Result Code Result Code is used to indicate success or failure. Zero indicates Success. Positive result codes indicate communication problems; negative result codes indicate an illegal value in one of the parameters. See Table 5.1-6 for positive result codes and Table 5.1-7 for negative result codes.

  • Page 30: Random Channel

    5.2 Edlog Programming This section only applies to the CR10(X), CR23X, and CR510 dataloggers. The datalogger is used to measure and record data values. The TX312 is used to transmit data over a GOES satellite to a ground receiving station. Program instruction 126 is used to send data from the datalogger to the TX312 satellite transmitter.

  • Page 31: Deciding How Much Data Will Be Transmitted And When

    TX312 Transmitter of repetitions has been met. When properly configured, the TX312 will ensure the data is transmitted on the correct channel, at the correct baud rate and at the correct time without overrunning the transmit window. The datalogger will interface with the TX312 under program control. Two program instructions are used, P126 and P127.

  • Page 32: Managing Data, Writing More Data Than Will Be Transmitted

    TX312 Transmitter datalogger formats the data before the data is sent to the TX312. The data format is chosen with the P126 program instruction. 5.2.3 Managing Data, Writing More Data than Will Be Transmitted The datalogger has two data storage areas: Final Storage area 1 (FS1) and Final Storage area 2 (FS2).

  • Page 33: Buffer Control

    The first parameter of Edlog instruction 126 (P126) is called buffer control. Buffer control has two purposes: 1) to determine which buffer data is written to, and 2) if the buffer is erased before data is written. The TX312 has two independent buffers, one for self-timed transmissions and one for random transmissions.

  • Page 34: Read Status And Diagnostic Information From The Tx312

    2) Datalogger will initiate a test transmission on a random channel. 3) Datalogger will reset the error register of the TX312. 4) Return TX312 to on-line mode following a forced random transmission. Parameter 1 allows you to determine what command will be issued to the...

  • Page 35: P127, Command 0: Read Time

    TX312 Transmitter Parameter 2 is the starting input location for the string of information the TX312 will return. Each P127 command returns a string of information. Each command requires a different number of input locations. The first piece of information returned is always the result code of the command.

  • Page 36: P127, Command 2: Read Last Message Status

    TX312 Transmitter TABLE 5.2-3. P127 Command 1: Read Status In Loc Contents Command Result Code Bytes of data in self-timed buffer Time until next self-timed transmission: Days Time until next self-timed transmission: Hours Time until next self-timed transmission: Minutes Time until next self-timed transmission: Seconds...

  • Page 37: P127 Command 3: Initiate Random Transmission

    3 will pull the TX312 off line. After the random transmission attempt, the TX312 must be put back on line with command 6. When command 6 is used, all data in the TX312 is erased. Random transmission may require up to five minutes (GPS timeout) for setup and transmission.

  • Page 38: P127, Command 5: Clear Tx312 Error Registers

    TX312. 5.2.5.7 P127, Command 6: Return TX312 to on-line mode. Command 6 is used to return the TX312 to online mode. Typically used after a forced random transmission. The TX312 has an off-line time-out of one hour.
  • Page 39 6: End (P95) Edlog program example 2 writes data to final storage once an hour and transfers data to the TX312 once every 4 hours. Example 2 also shows how to use the result codes to ensure P126 executes successfully.
  • Page 40 4: If time is (P92) 1: 0 Minutes (Seconds --) into a 2: 240 Interval (same units as above) 3: 30 Then Do ; Transfer data to TX312 5: Data Transfer to HDR GOES (P126) 1: 0 Self-Timed/Append 2: 0 Binary Format 3: 41...

  • Page 41: Field Installation

    The transmission antenna must have a clear view of the spacecraft. Other requirements are not specific to the TX312, but are mentioned here anyway. The TX312 must be mounted in an enclosure that will protect it from the environment, including condensation.

  • Page 42: Gps Antenna

    After the first fix, the TX312 will acquire a GPS fix once a day. Each time the GPS system acquires a fix, the entire GPS almanac is downloaded, which requires about 15 minutes.

  • Page 43: A. Information On Eligibility And Getting Onto The Goes System

    Appendix A. Information on Eligibility and Getting Onto the GOES System A.1 Eligibility U.S. federal, state, or local government agencies, or users sponsored by one of those agencies, may use GOES. Potential GOES users must receive formal permission from NESDIS. A.2 Acquiring Permission The user contacts NESDIS at the following address and submits a formal request to transmit data via GOES.
  • Page 44 This is a blank page.

  • Page 45: B. Data Conversion Computer Program

    Appendix B. Data Conversion Computer Program (written in BASIC) REM THIS PROGRAM CONVERTS 3-BYTE ASCII DATA INTO DECIMAL INPUT "RECEIVE FILE?", RF$ OPEN RF$ FOR OUTPUT AS #2 INPUT "NAME OF FILE CONTAINING GOES DATA"; NFL$ DIM DV$(200) WIDTH "LPT1:", 120 OPEN NFL$ FOR INPUT AS #1 WHILE NOT EOF(1) LINE INPUT #1, A$...
  • Page 46 This is a blank page.

  • Page 47: C. Antenna Orientation Computer Program

    Appendix C. Antenna Orientation Computer Program (written in BASIC) REM THIS PROGRAM CALCULATES THE AZIMUTH AND ELEVATION FOR AN REM ANTENNA USED WITH A DCP FOR GOES SATELLITE COMMUNICATIONS CLS : CLEAR 1000 INPUT "SATELLITE LONGITUDE (DDD.DD)"; SO INPUT "ANTENNA LONGITUDE (DDD.DD)"; SA PRINT "ANTENNA LATITUDE (DDD.DD)--(SOUTH LATITUDE ENTERED"...
  • Page 48 This is a blank page.

  • Page 49: Raws-7 Data Format

    Appendix D. RAWS-7 Data Format D.1 Introduction RAWS-7 data format is used to transmit weather data in an ASCII based table format. Upon reception, data does not need to be decoded. Software such as WeatherPro can be used to archive and view the data. RAWS-7 data format is compatible with NIFC.

  • Page 50: Raws-7 Sample Data

    Appendix D. RAWS-7 Data Format D.4 RAWS-7 Sample Data 00.12 00.05 01.09 Rain fall: Hundredths of and inch 109 022 002 Wind Speed: Avg of last 10 minutes 234 123 087 Wind Direction: Avg of last 10 minutes 115 069 -23 Air Temperature: Sample 100 056 012 Relative Humidity: Avg of Last 10 minutes...

  • Page 51: Writing Additional Data Values Beyond The Raws-7

    Appendix D. RAWS-7 Data Format P126 format code 3 ASCII RAWS-7 format, 1, 2 or 3 columns Total Rain xx.xx Avg Wind Speed Avg Wing Direction Sample Air Temp Avg Relative Humidity Sample Fuel Temp Battery Voltage xx.x P126 format code 4 ASCII fixed decimal xxx.x P126 format code 5...
  • Page 52 Appendix D. RAWS-7 Data Format ;{CR10X} ; RAWS-7 Data format example program ;Description: ; Measurements: ; Battery voltage (BattVolt) - volts ; Air temperature (AirTemp) - Degrees F ; Relative humidity (RH) - Percent ; Wind speed (Wspd) - MPH ;...
  • Page 53 Appendix D. RAWS-7 Data Format ; Measure Fuel Moisture ; Wiring: ; Power enable: C8 ; Signal: SE 12 4: Period Average (SE) (P27) 1: 1 Reps 2: 4 200 kHz Max Freq @ 2 V Peak to Peak, Period Output 3: 12 SE Channel 4: 10...
  • Page 54 Appendix D. RAWS-7 Data Format ; Wind Direction (03001-L) 10: Excite-Delay (SE) (P4) 1: 1 Reps 2: 5 2500 mV Slow Range 3: 3 SE Channel 4: 2 Excite all reps w/Exchan 2 5: 2 Delay (units 0.01 sec) 6: 2500 mV Excitation 7: 6 Loc [ Wdir...
  • Page 55 Appendix D. RAWS-7 Data Format 16: End (P95) ; Correct Fuel Moisture 17: Polynomial (P55) 1: 1 Reps 2: 28 X Loc [ FuelM 3: 28 F(X) Loc [ FuelM 4: -220.14 5: 365.89 6: -114.96 7: 0.0 8: 0.0 9: 0.0 ;...
  • Page 56 Appendix D. RAWS-7 Data Format ; if no fuel temp sensor, ; load 999 for data value 26: If (X<=>F) (P89) 1: 7 X Loc [ FuelT 2: 4 < 3: -35 4: 30 Then Do 27: Z=F (P30) 1: 999 2: 0 Exponent of 10 3: 7...
  • Page 57 Appendix D. RAWS-7 Data Format ; Calculate average wind speed and direction 37: Wind Vector (P69) 1: 1 Reps 2: 0 Samples per Sub-Interval 3: 1 S, é1 Polar 4: 5 Wind Speed/East Loc [ Wspd 5: 6 Wind Direction/North Loc [ Wdir ;...
  • Page 58 Appendix D. RAWS-7 Data Format 45: Sample (P70) 1: 1 Reps 2: 10 Loc [ Avg10WS ] 46: Sample (P70) 1: 1 Reps 2: 11 Loc [ Avg10WD ] 47: Sample (P70) 1: 1 Reps 2: 3 Loc [ AirTemp ] 48: Sample (P70) 1: 1 Reps...
  • Page 59 Appendix D. RAWS-7 Data Format ; FIRST HOUR ; First hour (column 1) is the top of the first hour after ; the transmit window. ; Move hourly values to "old" place holders ; Input storage is used to hold hourly data until ;...
  • Page 60 Appendix D. RAWS-7 Data Format ;SECOND HOUR ; At the second hour of a 3 hour interval, move hourly data ; values to the "mid" place holders. 65: If time is (P92) 1: 0 Minutes (Seconds --) into a ;changed 3/31/0 2: 180 Interval (same units as above) 3: 10...
  • Page 61 Appendix D. RAWS-7 Data Format ; At the top of the 3rd hour, move hourly data values ; to the "new" place holders 76: If time is (P92) 1: 60 Minutes (Seconds --) into a ;changed 3/31/0 2: 180 Interval (same units as above) 3: 10 Set Output Flag High (Flag 0) 77: Set Active Storage Area (P80)
  • Page 62 Appendix D. RAWS-7 Data Format ; xxx xxx xxx Dir Max WS : Oldest to the left ; xxx xxx xxx Max WS Oldest to the left ; xxxxx xxxxx xxxxx Avg SRad : Oldest to the left ; xxx xxx xxx fuel mois : Oldest to the left ;P126 Instruction, Parameter 2 Options...
  • Page 63 Appendix D. RAWS-7 Data Format 95: Do (P86) 1: 10 Set Output Flag High (Flag 0) ; Set resolution high 96: Resolution (P78) 1: 1 High Resolution ; Write row 10 to final storage 97: Sample (P70) 1: 3 Reps 2: 22 Loc [ SRad_Old ] ;...
  • Page 64 Appendix D. RAWS-7 Data Format 3: Z=X*F (P37) 1: 35 X Loc [ Batt_load ] 2: .1 3: 35 Z Loc [ Batt_load ] 4: Z=X*F (P37) 1: 36 X Loc [ GPSAccTm ] 2: 10 3: 36 Z Loc [ GPSAccTm ] 5: End (P95) ;...
  • Page 65 Appendix D. RAWS-7 Data Format 17: Set Active Storage Area (P80) 1: 2 Final Storage Area 2 2: 222 Array ID 18: Real Time (P77) 1: 0220 Day,Hour/Minute (midnight = 2400) 19: Sample (P70) 1: 1 Reps 2: 14 Loc [ P126_RC ] 20: Sample (P70) 1: 8 Reps...
  • Page 66 Appendix D. RAWS-7 Data Format This is a blank page. D-18...

  • Page 67: E. Goes Dcs Transmit Frequencies

    Appendix E. GOES DCS Transmit Frequencies 300 & 100 BPS Channels 1200 BPS Channels 300 & 100 BPS Channels 1200 BPS Channels Channel Frequency Channel Frequency Channel Frequency Channel Frequency Number Number+ A Number Number+ A 401.701000 401.701750 401.771500 401.702500 401.773000 401.773750 401.704000...
  • Page 68 Appendix E. GOES DCS Transmit Frequencies 300 & 100 BPS Channels 1200 BPS Channels 300 & 100 BPS Channels 1200 BPS Channels Channel Frequency Channel Frequency Channel Frequency Channel Frequency Number Number+ A Number Number+ A 401.842000 401.842750 401.917000 401.917750 401.843500 401.918500 401.845000...
  • Page 69 Appendix E. GOES DCS Transmit Frequencies 300 & 100 BPS Channels 1200 BPS Channels 300 & 100 BPS Channels 1200 BPS Channels Channel Frequency Channel Frequency Channel Frequency Channel Frequency Number Number+ A Number Number+ A 401.992000 401.992750 402.067000 402.067750 401.993500 402.068500 401.995000...
  • Page 70 Appendix E. GOES DCS Transmit Frequencies This is a blank page.

  • Page 71: High Resolution 18-Bit Binary Format

    Appendix F. High Resolution 18-Bit Binary Format When using the binary 18 bit signed 2’s complement integer format, all data values in the datalogger final storage area must be in high resolution format. In most cases the datalogger program should set the data resolution to high at the beginning of the program.
  • Page 72 Appendix F. High Resolution 18-Bit Binary Format Where 17 represents bit 17 - the most significant bit and is used to determine the sign. Converting the 18 bit data point to an integer can be done manually. Don’t forget the 18 bits are numbered 0 through 17. Bit 17 is the sign bit, when bit 17 is set, the number is negative.
  • Page 73 Appendix G. Extended ASCII Command Appendix G describes the ASCII command interface for the TX312 transmitter. These commands can be entered using the terminal window of SatCommander software, or suitable terminal emulation software. G.1 Command Interface G.1.1 RS-232 Serial Port Interface All Data Entry and Diagnostic functions are accessed using the RS-232 Interface.
  • Page 74 Syntax: TIME= yyyy/mm/dd hh:mm:ss Access level: USER TX312 State: Enabled/Disabled This command sets the date and time in the transmitter. The date and time will be overwritten when a GPS time synchronization occurs. Self timed transmissions will not occur until the time has been set either using this command or from the GPS.
  • Page 75 Syntax: IRC=c Access level: USER TX312 State: Enabled/Disabled This command defines the ASCII character that will be substituted for any Prohibited ASCII character detected in the transmission data when operating in ASCII or Pseudo-Binary mode. The default character is ‘*’. Only printable ASCII characters, excluding space, are permitted.
  • Page 76 G.2.6 Enable Transmissions Syntax: Access level: USER TX312 State: Disabled This command enables transmissions. The configuration parameters will be checked for validity. If valid, they are saved to non-volatile memory and the transmitter is enabled. The enabled/disabled state of the transmitter is also stored in non-volatile memory so that it will resume operation after a power cycle if it was previously enabled.
  • Page 77 G.2.9 Enable Technician Command Mode Syntax: TECHMODE password Access level: USER TX312 State: Enabled/Disabled This command changes the command access level to TECHNICIAN. The access level will not change unless the password is correct. G.2.10 Enable User Command Mode Syntax:...
  • Page 78 G.3.1 Set GOES DCP Platform ID Syntax: NESID=xxxxxxxx Access level: USER TX312 State: Disabled Sets the transmitter’s GOES DCP Platform ID to the hex value xxxxxxxx. Valid range is even hex numbers from 2 to 0xfffffffe. G.3.2 Set Self-Timed Transmission Channel Number...
  • Page 79 Syntax: FTT=hh:mm:ss Access level: USER TX312 State: Disabled Set the time for the first timed transmission of the day. Valid range is 00:00:00 to 23:59:59. The First Transmission Time is also referred to as the Offset, and is between 00:00:00 and the Self-Timed Transmission Interval.
  • Page 80 Syntax: TPR=S/L Access level: USER TX312 State: Disabled Set the preamble type for timed transmissions. Valid values are S or L (Short or Long). This setting only applies for 100 BPS timed transmissions on channels 1-200. All 300 and 1200 BPS transmissions us short preamble. All 100 BPS transmissions on channels above 200 use long preamble.
  • Page 81 G.3.13 Set Random Transmission Bit rate Syntax: RBR=bbbb Access level: USER TX312 State: Disabled This command sets the random transmission bit rate where bbbb is the bit rate parameter and has valid values of 100, 300 and 1200. G.3.14 Set Random Transmission Interval...
  • Page 82 CSMODE=x Where: x = SDC enables the CS I/O port for SDC slave communications with a CR10X, CR10X PB or CR1000 data logger. The TX312 address is fixed at 0x41. x = SDI enables the SDI-12 port as an SDI-12 recorder. Sensors connected to the SDI-12 port will be polled using the SDI-12 commands entered into the SDI-12 command table.
  • Page 83 SDI 7, 3CC4!,2 iii) SDI 1, 0R!,1 Access level: USER TX312 State: Enabled/Disabled This command adds an SDI-12 command to the SDI command table in the table location specified by the table index. The command table can hold up to 10 entries numbered 0 to 9.
  • Page 84 Access level: USER TX312 State: Enabled/Disabled This command prints the SDI command table entry indicated by i or all SDI-12 commands if i is not specified. The RCFG command will be also print the contents of the SDI table along with the other configuration parameters.
  • Page 85 Syntax: SIN=hh:mm:ss Access level: USER TX312 State: Enabled/Disabled Sets the sample interval for all SDI-12 sensors. If the interval is set to a value less than the time required to perform all the SDI-12 measurements, the measurements will be performed continuously. Setting the value to 00:00:00 effectively disables SDI-12 data collection.
  • Page 86 TX312 State: Enabled This command overwrites the GOES Timed Buffer with the data provided. The TX312 transmitter will insert the 31 bit GOES ID, any header information (e.g. HDR Flag byte), and append the EOT so these should not be included in the TDT data.
  • Page 87 Appendix G. Extended ASCII Command Set G.5.2 Read Number of Bytes in the Self-Timed Transmission Buffer Syntax: Access level: USER TX312 State: Enabled/Disabled Returns the number of bytes stored in the timed transmission buffer. G.5.3 Read the Maximum Self-Timed Message Length Syntax: MTML...
  • Page 88 G.5.6 Read Length of the Message in the Random Transmission Buffer Syntax: Access level: USER TX312 State: Enabled/Disabled Returns the number of bytes stored in the random transmission buffer. G.5.7 Read the Maximum Random Message Length Syntax: MRML...
  • Page 89 Appendix G. Extended ASCII Command Set G.6.1 Read Version Information Syntax: Access level: USER TX312 State: Enabled/Disabled This command returns the transmitter serial number, hardware version number, firmware version number and GPS module version numbers. G.6.2 Read Transmission Status Syntax:...
  • Page 90 No Tx Has Occurred G.6.4 Read GPS Status Syntax: Access level: USER TX312 State: Enabled/Disabled This command returns the current GPS status including satellite numbers and signal strengths in the following format if the GPS is on: Fix Status: Full Accuracy...
  • Page 91 Appendix G. Extended ASCII Command Set G.6.5 Read GPS Position Syntax: Access level: USER TX312 State: Enabled/Disabled This command returns position obtained during the last GPS fix in the following format: Time of fix: dd/mm/yyyy hh:mm:ss[CR][LF] Lat: sxx.xxxxx[CR][LF] Long: sxxx.xxxxx[CR][LF] Alt: xxxxx[CR][LF]>...
  • Page 92 G.6.9 Read Reflected Power Syntax: RRFL Access level: USER TX312 State: Enabled/Disabled Returns the reflected power in dBm. This value is updated at the bit rate when transmitting and every 30 seconds when not transmitting. G.6.10 Read Power Supply Syntax:...
  • Page 93 Appendix H. GOES/Radio Set Certification...
  • Page 96 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

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