TX320 Transmitter Revision: 11/13 C o p y r i g h t © 2 0 0 0 - 2 0 1 3 C a m p b e l l S c i e n t i f i c , I n c .
Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual. Products not manufactured, but that are re-sold by Campbell, are warranted only to the limits extended by the original manufacturer.
Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000.
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction .................................................................1 2. Cautionary Statements...............................................1 3. Initial Inspection .........................................................1 3.1 Ships With List.....................................................................................1 4.
Table of Contents 7.5.1.1 Result Code ..................................................................... 18 7.5.1.2 Data Table ....................................................................... 19 7.5.1.3 Table Option.................................................................... 19 7.5.1.4 Buffer Control ................................................................. 19 7.5.1.5 Data Format ..................................................................... 19 7.5.1.6 GOESData() Example ...
Table of Contents Appendices A. Information on Eligibility and Getting Onto the GOES System ....................................................... A-1 A.1 A.2 Eligibility ........................................................................................ A-1 Acquiring Permission...................................................................... A-1 B. Data Conversion Computer Program (written in BASIC) ............................................................... B-1 C.
Table of Contents F.3.12 F.3.13 F.3.14 F.3.15 F.3.16 F.3.17 Set Random Transmission Channel Number.............................F-8 Set Random Transmission Bit Rate...........................................F-9 Set Random Transmission Interval ...........................................F-9 Set Random Transmission Randomizing Percentage ................F-9 Set Random Transmission Repeat Count ..................................F-9 Enable or Disable Random Transmission Message Counter .........................
Table of Contents 7-7. 7-8. 7-9. 7-10. 7-11. 7-12. 8-1. 8-2. 8-3. P127 Command 1: Read Status .........................................................31 P127 Command 2: Read Last Message Status ..................................31 P127 Command 3: Initiate Random Transmission............................32 P127 Command 4: Read TX320 Error Registers ..............................32 P127 Command 5: Clear Error Registers ..........................................33 P127 Command 6: Force Online Mode............
Table of Contents vi
TX320 Transmitter 1. Introduction The TX320 is a high data rate transmitter that supports one-way communication, via satellite, from a Campbell Scientific datalogger to a ground receiving station. Satellite telemetry offers a convenient telecommunication alternative for field stations where phone lines or RF systems are impractical.
TX320 Transmitter 4.. Quick Start 4.1 Step 1 – Configure the TX320 Use our Device Configuration Utility (DevConfig) to enter the required National Environmental Satellite Data and Information Service (NESDIS) information that is unique to each Data Collection Platform (DCP). DevConfig must be version 2.02 or higher. The TX320 has non-volatile memory to store the setup information. NOTE Before February 2012 the TX320 was configured using SatCommand instead of DevConfig.
TX320 Transmitter 4.1.2 Setting Editor | Configuration An example of parameters entered in the Configuration tab is provided in FIGURE 4-2. NESDIS Platform ID: Type in your NESDIS-assigned ID number. This is an 8-digit hex number. Self-Timed Transmission Channel: Select the NESDIS-assigned self-timed transmission channel. For 1200-baud channels, the formal channel designation is the channel number followed by the letter A, for example: 99A.
TX320 Transmitter FIGURE 4-2. Settings Editor | Configuration in Device Configuration Utility NOTE If NESDIS has not assigned a Random Channel, the following parameters do not apply. Random Transmission Channel: Select the NESDIS-assigned random transmission channel. Setting the channel number to a value of zero will disabled random transmissions. Random Transmission Bit Rate: Select the NESDIS-assigned channel bit rate (baud rate). This value will be either 300 or 1200 for a CS-2 device.
TX320 Transmitter Random Transmission Data Format: Specify whether random data will be transmitted in ASCII, binary, or pseudo binary formats. This setting does not change the format of the data; it only changes the flag word. The datalogger program determines the data format and should match the format chosen for this setting. NOTE The default values for the remaining parameters in Settings Editor | Configuration can be used for many applications.
TX320 Transmitter 4.3 Step 3 – Install the Data Collection Platform (DCP) 1. Mount the 25316 Yagi antenna to a pole or mast by using the U-bolts included with the antenna mount (see FIGURE 4-3). FIGURE 4-3. Yagi antenna 2. 6 Aim the Yagi antenna at the spacecraft; azimuth and elevation angle positions are included on the bracket label. The Alignment tab in DevConfig can be used to determine the correct coordinates for the azimuth and elevation (see FIGURE 4-4).
TX320 Transmitter FIGURE 4-4. Alignment Tab in Device Configuration Utility CAUTION 3. Insert the 7623 3/4 IPS aluminum pipe into the GPS antenna (see FIGURE 4-5). 4. Mount the 7623 3/4 IPS aluminum pipe to a crossarm via a CM220 mount or NU-RAIL fitting. FIGURE 4-5 and FIGURE 4-6 show the GPS antenna mounted to a crossarm using a CM220 mount. The ideal location for the GPS antenna is above everything, with the shortest cable possible. Refer to Section 7.
TX320 Transmitter FIGURE 4-5. Exploded view of the GPS antenna mounted to a crossarm via the CM220. FIGURE 4-6.
TX320 Transmitter 5. Mount the TX320, CH100 or CH200 regulator, BP12 or BP24 battery pack, and CR1000 to the backplate of an ENC16/18 enclosure. 6. Mount the enclosure and solar panel to the pole or tripod. 7. Connect the COAXNTN cable to the Yagi antenna. Then route the COAXNTN cable through the enclosure conduit and connect it to the TX320 connector labeled RF Out (see FIGURE 4-7 and FIGURE 4-8). 8. Connect the TNC connector of the 18017-L cable to the GPS antenna.
TX320 Transmitter GPS Connector CS I/O: Used to connect to the CR1000’s CS I/O port via the SC12 cable Power Port: The green connector on the 18133 power cable connects to this port FIGURE 4-8.
TX320 Transmitter BP24’s connector attaches to the 18133 Power Cable 28490 Red/Black power wires connect to the 12V and G terminals on the CH200 or CH100 COAXNTN Cable SC12 Cable FIGURE 4-9. DCP enclosure 5. Overview The TX320 uses 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 TX320 also has a 15.
TX320 Transmitter The TX320 supports High Data Rate specifications. The TX320 includes the following communication ports: • • • CS I/O port for Campbell dataloggers RS-232 port for dataloggers and PC communication USB port for PC communications The CS I/O port is a Campbell Scientific Synchronous Device for Communication (SDC) port, address 4. NOTE 5.1 The 21X and CR7 dataloggers do not support SDC or the TX320.
TX320 Transmitter 5.1.3 .1.3 Data Retrieval Data retrieval via the TX320 and the GOES system is illustrated in FIGURE 5-1. 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 three-byte ASCII (see Appendix B for a computer program that converts the data to decimal). You can also retrieve data directly from the NESDIS ground station via DOMSAT, LRGS, or LRIT.
TX320 Transmitter Transmit Power: 5.6 W for 300 bps, 11.2 W for 1200 bps Frequency Range: 401.701 MHz to 402.1 MHz Frequency Stability Initial Accuracy: Short-Term Drift: Aging: Vcc + Temperature: ±20 Hz disciplined to GPS ±0.04 Hz/s ±0.1 PPM/year ±0.1 PPM Channel Bandwidth: 1.
TX320 Transmitter 7. Installation 7.1 Field Site Requirements The TX320 has two siting requirements for proper operation. The GPS antenna must have a clear view of most of the sky. The transmission antenna must have a clear view of the spacecraft. Other requirements are not specific to the TX320, but are mentioned here anyway. The TX320 must be mounted in an enclosure that will protect it from the environment, including condensation.
TX320 Transmitter 1, 3, 5 are not used 2 = Ground 4 = RXD (output) 6 = SDE (input) 7 = CLK (input) 8 = 12V (input) 9 = TXD (input) 7.2.2.2 RS-232 Port The RS-232 port is a DB9 female connector configured as DCE. Only three pins are used, transmit on pin two, receive on pin three, and ground on pin five. Transmit is an output and receive is an input to the TX320. The RS-232 port allows the transmitter to be connected to a PC’s 9-pin serial port or to a datalogger’s RS-232 port.
TX320 Transmitter with a power cable that includes the fuse and a connector arrangement that allows the transmitter to pull power directly from the battery when using the CH200, CH100, PS100, or PS200 power supply. With the potential for a 3000 mA current drain, the voltage drop along the battery power leads must be considered. The battery power leads are both wires that run from the battery to the power input connectors of the TX320.
TX320 Transmitter The GPS is required for proper operation. After the transmitter is reset, or first powered up, it can’t schedule a transmission until a GPS fix has been established or the internal clock has been manually set. After the first fix, the TX320 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. 7.4.2 GPS Antenna Location The GPS antenna mounts to the end of a crossarm via the 7623 3/4-in.
TX320 Transmitter 7.5.1.2 Data Table The Data Table argument is used to specify which data table the GoesData() instruction is to copy data from. 7.5.1.3 Table Option The Table Option is used to specify what data is copied from the data table. There are three options. Use 0 to specify all new data. Use 1 to specify only the most current record. Use any other positive number to specify the number of records to be copied each time GoesData() is executed.
TX320 Transmitter NOTE When transmitting random messages in pseudo binary format the message counter must be turned off (RMC=N). The message count is a simple three digit count of how many times the transmission has been repeated. Digits 0 to 9 are not legal characters in pseudo binary mode and are replaced at transmission time with the replacement character specified by the IRC command. The default IRC character is *.
TX320 Transmitter 'program table DataTable (Tempdata,1,1000) DataInterval (0,15,min,10) Sample (1,TCTemp,FP2) Sample (1,PanelT,FP2) Sample (1,battery1,FP2) EndTable DataTable(GoesStats,true,300) DataInterval(0,1,hr,0) Sample(14,LastStatus(),fp2) EndTable BeginProg Scan (10,Sec,3,0) Battery (battery1) PanelTemp (PanelT,250) TCDiff (TCTemp,1,mV25C ,2,TypeT,PanelT,True ,0,250,1.
TX320 Transmitter Command 0 (Read Time) will read the TX320 clock. Under normal operating conditions, the time is GMT. There are delays in reading the time from the TX320. The array needs to be four elements or more. Data are returned as: result code, hour, minute, second. TABLE 7-1. GoesStatus Command 0: Read Time Index 1 2 3 4 Contents Command Result Code Hours (GMT) Minutes Seconds 7.5.2.
TX320 Transmitter forward power, reflected power, etc. Also returned is the GPS derived Latitude and Longitude, which is updated once a day. The GPS update interval can be changed. TABLE 7-3.
TX320 Transmitter See Section 8.3, Error Codes, for a list of error codes and details about the error codes. 7.5.3 GoesGPS Example: Public GPSdata(6), GPStime(7) GoesGPS(GPSdata(), GPStime()) The instruction GoesGPS() returns two arrays of information. The first array is six elements long. The second array is seven elements long.
TX320 Transmitter Instruction details: GoesSetup(Result Code, Platform ID, Window, Timed Channel, Time Baud, Random Channel, Random Baud, Timed Interval, Timed Offset, Random Interval) 7.5.4.1 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. Refer to Section 8.2, Result Codes, for error code tables and further details. 7.5.4.
TX320 Transmitter 7.5.4.9 Timed Offset Timed Offset is assigned by NESDIS and is a string variable in the format of “hh_mm_ss”, where hh is hours and usually 00, mm is minutes, and ss is seconds. 7.5.4.10 Random Offset Random Offset is a string variable in the format of “hh_mm_ss” where hh and ss are usually zero and mm is 30 or 45. 7.5.4.
TX320 Transmitter 7.6.1 Deciding How Much Data will be Transmitted and When The amount of data that can be transmitted depends on several factors: the transmit window length, the transmit baud rate, and the data format. The transmit window limits the time available for data to be sent. The baud rate determines how fast data is sent. The data format determines how many bytes are required per data point.
TX320 Transmitter 7.6.4 Sending Data to the Transmitter (P126) Edlog Instruction 126 is used to transfer data to the TX320.
TX320 Transmitter CSI floating point binary data requires 3 B per data point. Data must be low resolution. Sign and decimal location are maintained. This is an efficient data format. Floating point ASCII requires 7 B per data point. Data must be low resolution. Sign and decimal location are maintained. Data does not need to be converted after transmission. Data points are separated by a comma. This is not an efficient data format, but it is convenient.
TX320 Transmitter Parameter 1 allows you to determine what command will be issued to the TX320. Parameter 2 is the starting input location for the string of information the TX320 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. TABLE 7-5 lists the result codes and explains them. TABLE 7-5.
TX320 Transmitter TABLE 7-7.
TX320 Transmitter 7.6.5.4 P127, Command 3: Transmit Random Message Overwrite random buffer with 1 2 3 4 (ASCII) During GPS acquisition, the LED lights green. During transmission, the LED lights red. TABLE 7-9. P127 Command 3: Initiate Random Transmission In Loc 1 Contents Result Code Random message channel and repeat interval must be enabled in the TX320 configuration. If random messages have not been enabled, command 3 will fail. If the GPS acquisition fails, the random transmission will fail.
TX320 Transmitter 7.6.5.6 P127, Command 5: Clear TX320 Error Registers Clear error registers of TX320. Requires one input location. TABLE 7-11. P127 Command 5: Clear Error Registers In Loc 1 Contents Result Code Result code of 0 indicates success. Command 5 is used to erase all errors from the error registers of the TX320. 7.6.5.7 P127, Command 6: Return TX320 to Online Mode Command 6 is used to return the TX320 to online mode. Typically used after a forced random transmission.
TX320 Transmitter 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 TX320 5: Data Transfer to HDR GOES (P126) 1: 0 Self-Timed/Append 2: 0 Binary Format 3: 41 Result Code Loc [ P126_RC ] 6: End (P95) 8. Troubleshooting/Diagnostics 8.1 Diagnostics Button The DIAGNOSTICS button has two purposes. Press and hold the DIAGNOSTICS button for about 2 seconds. The STATUS LED will flash once to indicate the fail-safe has not been tripped.
TX320 Transmitter does not respond with the ACK character within 500 ms after the data has been transferred, the result code is 7. Result code 7 indicates the data was not received by the transmitter. The datalogger cannot resend the data. The GoesData() and GoesSetup() instructions may also have a negative result code (see TABLE 8-2). A negative result code indicates that there is an illegal value in one of the parameters. TABLE 8-1.
TX320 Transmitter TABLE 8-3.
TX320 Transmitter Error code 18 (0x12), message abort due to power supply, indicates the transmitter power supply did not provide enough voltage. Check system battery. If the system battery is low, the RF power supply will not be able to operate properly. Device Configuration Utility displays the supply voltage in Settings Editor | Status (see FIGURE 8-1). The loaded battery voltage must not drop below 10.8 volts.
TX320 Transmitter FIGURE 8-1. Settings Editor | Status in Device Configuration Utility 8.4 Using Device Configuration Utility for Troubleshooting/ Testing 8.4.1 Setting Editor | GPS This tab displays information about the GPS communication (see FIGURE 8-2). The GPS is required for proper operation. After the transmitter is reset, or first powered up, it can’t schedule a transmission until a GPS fix has been established or the internal clock has been manually set.
TX320 Transmitter Also check the GPS antenna placement. Poor GPS antenna placement will increase the number of missed transmissions, or possibly stop all transmission (see Section 7.4, GPS Antenna, for more information). FIGURE 8-2. Settings Editor | GPS in Device Configuration Utility 8.4.2 Setting Editor | Status The Status tab provides a lot of useful information about the transmitter that can help in troubleshooting (see FIGURE 8-1). Specifically, ensure that the fail-safe status is OK.
TX320 Transmitter 8.4.3 Terminal The Terminal tab supports manually-entered commands (see the appendix for individual commands). It also includes buttons on the right side of the screen that provide the following functions. Read Audit Log: Displays 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.
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 1. The user contacts NESDIS at the following address and submits a formal request to transmit data via GOES. Non-U.S.
Appendix A.
Appendix B.
Appendix B.
Appendix C. Antenna Orientation Computer Program (written in BASIC) 5 6 10 20 30 40 45 50 60 70 80 90 100 110 115 120 130 140 150 155 160 170 180 190 200 210 220 300 310 320 330 340 350 360 370 380 400 460 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.
Appendix C.
Appendix D. GOES DCS Transmit Frequencies 300 & 100 bps Channels Channel Frequency Number MHz 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 401.701000 401.702500 401.704000 401.705500 401.707000 401.708500 401.710000 401.711500 401.713000 401.714500 401.716000 401.717500 401.719000 401.720500 401.722000 401.723500 401.725000 401.726500 401.728000 401.729500 401.731000 401.732500 401.734000 401.735500 401.737000 401.
Appendix D. GOES DCS Transmit Frequencies 300 & 100 bps Channels Channel Frequency Number MHz 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 D-2 401.842000 401.843500 401.845000 401.846500 401.848000 401.849500 401.851000 401.852500 401.854000 401.855500 401.857000 401.858500 401.860000 401.861500 401.863000 401.864500 401.866000 401.867500 401.869000 401.
Appendix D. GOES DCS Transmit Frequencies 300 & 100 bps Channels Channel Frequency Number MHz 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 401.992000 401.993500 401.995000 401.996500 401.998000 401.999500 402.001000 402.002500 402.004000 402.005500 402.007000 402.008500 402.010000 402.011500 402.013000 402.014500 402.016000 402.017500 402.019000 402.
Appendix D.
Appendix E. 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. Use the P78 instruction with parameter 1 set to 1. P77 Real Time can not write the time or date in high resolution.
Appendix E. High Resolution 18-Bit Binary Format Where the 18-bit data point is made by combining the three bytes after bit 7 and bit 6 of each byte have been dropped. Where 0 represents bit 0 - the least significant bit 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.
Appendix F. Extended ASCII Command Set Appendix F describes the ASCII command interface for the TX320 transmitter. These commands can be entered using the terminal window of the Device Configuration Utility, or suitable terminal emulation software. F.1 Command Interface F.1.1 Port Interfaces All data entry and diagnostic functions are accessed using either the RS-232 Interface or USB interface. F.1.1.
Appendix F.
Appendix F. Extended ASCII Command Set F.2.2 Replacement Character Read/Set Syntax: IRC=c Access level: USER TX320 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. In pseudo binary mode, numeric characters are considered illegal. F.2.
Appendix F. Extended ASCII Command Set F.2.6 Enable Transmissions Syntax: ETX Access level: USER TX320 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.
Appendix F. Extended ASCII Command Set F.2.9 Enable Technician Command Mode Syntax: TECHMODE password Access level: USER TX320 State: Enabled/Disabled This command changes the command access level to TECHNICIAN. The access level will not change unless the password is correct. F.2.10 Enable User Command Mode Syntax: USERMODE Access level: USER TX320 State: Enabled/Disabled This command changes the command access level back to USER. No password is required.
Appendix F. Extended ASCII Command Set F.3.1 Set GOES DCP Platform ID Syntax: NESID=xxxxxxxx Access level: USER TX320 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. F.3.2 Set Self-Timed Transmission Channel Number Syntax: TCH=ccc Access level: USER TX320 State: Disabled This command sets the channel number (ccc) for timed transmissions.
Appendix F. Extended ASCII Command Set F.3.5 Set Self-Timed transmission First Transmission Time Syntax: FTT=hh:mm:ss Access level: USER TX320 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. F.3.
Appendix F. Extended ASCII Command Set F.3.9 Set Self-timed Transmission Preamble Length Syntax: TPR=S/L Access level: USER TX320 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. F.3.
Appendix F. Extended ASCII Command Set For 100 bps operation on channels 201 – 266, the transmitter will be configured for international operation. Specifically, the 31-bit international EOT will be used (0x63CADD04) in place of the ASCII EOT. Setting the channel number to 0 will disable random transmissions. F.3.
Appendix F. Extended ASCII Command Set The random transmission repeat count is the number of times a random transmission will be repeated. The random transmissions will occur once every random transmission interval as specified by the randomizing interval. The valid range of this parameter is 0 – 99. For example, a value of 3 will direct the transmitter to send the data in the random buffer 3 times before clearing it.
Appendix F. Extended ASCII Command Set timed transmission, the data will not be included in the current transmission but will be buffered for the next interval. F.4.2 Read Number of Bytes in the Self-Timed Transmission Buffer Syntax: TML Access level: USER TX320 State: Enabled/Disabled Returns the number of bytes stored in the timed transmission buffer. F.4.
Appendix F. Extended ASCII Command Set Loading data into the random transmission buffer, triggers the random reporting sequence. Once triggered, the random reporting mechanism will send the data loaded in the buffer for the number of transmissions as specified by the random repeat count. The buffer will be cleared automatically when the number of transmissions specified have occurred.
Appendix F. Extended ASCII Command Set F.5.1 Read Version Information Syntax: VER Access level: USER TX320 State: Enabled/Disabled This command returns the transmitter serial number, hardware version number, firmware version number, and GPS module version numbers. F.5.
Appendix F. Extended ASCII Command Set If a transmission has occurred since the unit was last powered up, the transmitter responds to the command with: Tx Status: Failsafe Tripped/OK Tx Type: Timed/Random/Test Last Tx Length: 30 bytes Last Tx Start Time: 2004/12/16 23:29:48 Last Tx Stop Time: 2004/12/16 23:29:49 Forward Power: -23.1 dBm Power Supply: 12.0 V If a transmission has not occurred since power up, the transmitter will respond with: No Tx Has Occurred F.5.
Appendix F. Extended ASCII Command Set F.5.5 Read GPS Position Syntax: POS Access level: USER TX320 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]> Where latitude is in degrees, + for N and – for S, longitude is in degrees, + for E and – for W, and altitude is in meters.
Appendix F. Extended ASCII Command Set F.5.8 Read Reflected Power Syntax: RRFL Access level: USER TX320 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. F.5.9 Read Power Supply Syntax: RPS Access level: USER TX320 State: Enabled/Disabled Returns the power supply voltage in volts. This value is updated at the bit rate when transmitting and every 30 seconds when not transmitting. F.5.
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