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Campbell TX320, Инструкция по эксплуатации

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TX320 Transmitter 

6.3  GPS Antenna 

6.3.1  How the GPS Signal is Acquired and Used 

The GPS receiver will acquire a complete GPS fix at power up and once a day. 
The TX320 transmitter will continue to operate normally for 28 days without a 
GPS fix.  

The GPS signal is used for two functions. To keep track of time, four satellites 
are required.  The second use of the GPS signal is to correct the oscillator 
frequency.  The GPS receiver will output a very accurate 1-second pulse.  The 
1-second pulse is used to correct oscillator drift caused by changes in 
temperature and crystal aging.  

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.  

6.3.2  GPS Antenna Location 

The GPS antenna mounts to the end of a crossarm via the 7623 3/4-in. IPS 
threaded pipe and a 1049 NU-RAIL fitting or CM220 mounting bracket (see 
Figures 6-2 and 6-3).  The ideal location for the GPS antenna is above 
everything, with the shortest cable possible.  The GPS antenna will not receive 
the GPS signal through a steel roof or steel walls.  Concrete will probably act 
like steel.  Heavy foliage, snow, and ice will attenuate the GPS signal.  The 
more of the sky the antenna has a clear unobstructed view of, the better the 
GPS performance.  Better GPS performance will show up as less or no missed 
transmissions.  Poor GPS antenna placement will increase the number of 
missed transmissions, or possibly stop all transmission 

 

FIGURE 6-2.  Exploded view of the GPS antenna mounted to a 

crossarm via the CM220. 

34 

Содержание TX320

Страница 1: ...TX320 Transmitter Revision 3 12 C o p y r i g h t 2 0 0 0 2 0 1 2 C a m p b e l l S c i e n t i f i c I n c ...

Страница 2: ......

Страница 3: ...removing reinstalling and shipping defective products to Campbell Campbell will return such products by surface carrier prepaid within the continental United States of America To all other locations Campbell will return such products best way CIP Port of Entry INCOTERM 2010 prepaid This warranty shall not apply to any products which have been subjected to modification misuse neglect improper servi...

Страница 4: ...ng container Campbell Scientific s shipping address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and comply with the requirements specified in it The form is available from our web site at www campbellsci com repair A completed form must be either emailed to repa...

Страница 5: ...or 6 3 5 Power Connector 6 4 SatCommand Software 9 4 1 Install SatCommand 9 4 2 SatCommand General Description 9 4 3 Making Edits 9 4 3 1 NESDIS ID 9 4 3 2 Timed Channel 9 4 3 3 Timed Bit Rate 10 4 3 4 Timed Interval 10 4 3 5 First Timed Transmission 10 4 3 6 Timed Tx Window 10 4 3 7 Timed Msg Format 10 4 3 8 Random Channel 10 4 3 9 Random Bit Rate 11 4 3 10 Random Randomizing Interval 11 4 3 11 R...

Страница 6: ... GoesStatus Read Error Register 19 5 1 3 GoesGPS 21 5 1 4 GoesSetup 22 5 1 4 1 Result Code 23 5 1 4 2 Platform ID 23 5 1 4 3 Window 23 5 1 4 4 Timed Channel 23 5 1 4 5 Timed Baud Rate 23 5 1 4 6 Random Channel 24 5 1 4 7 Random Baud Rate 24 5 1 4 8 Timed Interval 24 5 1 4 9 Timed Offset 24 5 1 4 10 Random Offset 24 5 1 4 11 GOESSetup Example 24 5 2 Edlog Programming 24 5 2 1 Deciding How Much Data...

Страница 7: ...High Resolution 18 Bit Binary Format E 1 F Extended ASCII Command Set F 1 F 1 Command Interface F 1 F 1 1 Port Interfaces F 1 F 1 1 1 RS 232 Details F 1 F 1 1 2 Command Protocol F 1 F 1 1 3 Command Access Level F 2 F 2 General Configuration Commands F 2 F 2 1 Clock Read Set F 2 F 2 2 Replacement Character Read Set F 3 F 2 3 Save Configuration F 3 F 2 4 Restore Configuration F 3 F 2 5 Restore Defau...

Страница 8: ...f Timed Transmission Buffer F 10 F 4 2 Read Number of Bytes in the Self Timed Transmission Buffer F 11 F 4 3 Read the Maximum Self Timed Message Length F 11 F 4 4 Clear Self Timed Transmission Buffer F 11 F 4 5 Load Random Transmission Buffer F 11 F 4 6 Read Length of the Message in the Random Transmission Buffer F 12 F 4 7 Read the Maximum Random Message Length F 12 F 4 8 Clear Random Transmissio...

Страница 9: ... Result Codes Indicating Communication Problems 23 5 1 7 GoesSetup and GoesData Runtime Result Codes 23 5 2 1 P127 Result Codes 29 5 2 2 P127 Command 0 Read Time 29 5 2 3 P127 Command 1 Read Status 29 5 2 4 P127 Command 2 Read Last Message Status 30 5 2 5 P127 Command 3 Initiate Random Transmission 30 5 2 6 P127 Command 4 Read TX320 Error Registers 31 5 2 7 Error Codes 31 5 2 8 P127 Command 5 Clea...

Страница 10: ...TX320 Transmitter Table of Contents vi ...

Страница 11: ...ctive date June 2009 300 1200 BPS DCPRS Certification Standard version 1 0b March 2000 100 BPS Self timed DCPRS Certification Standard November 1981 100 BPS Random DCPRS Certification Standard November 1981 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 p...

Страница 12: ... Serial Port Signal Levels RS 232C Connector DB9F DCE Command protocols ASCII binary field diagnostics dataloggers with RS 232 port USB Port Connector Type B Command protocols ASCII binary field diagnostics CS I O Port Signal Levels TTL Connector DB9M Command Protocol Campbell Scientific Synchronous Device Communication address 4 Binary Command Campbell Scientific Dataloggers Environmental Operati...

Страница 13: ...platform ID uplink channel number and self timed or random transmit windows Self timed windows allow data transmission only during a predetermined time frame typically 10 seconds every hour The self timed data is erased from the transmitter s buffer after each transmission random data is not Random windows are for critical applications e g flood reporting and allow transmission immediately after a...

Страница 14: ...he four LEDs will cycle through quickly then the Synchronizing Clock to GPS LED will light for 15 minutes If there are data in a buffer waiting for transmission time the Data In Buffer LED will light During transmission the Transmitting LED will light The Status LED will only light after the Diagnostics button has been depressed Press and hold the Diagnostics button for about 2 seconds The Status ...

Страница 15: ...oggers to transfer data from the datalogger to the TX320 transmitter The CS I O SDC port allows other SDC devices and one modem enabled device to be connected to the same port at the same time This SDC port will allow the TX320 transmitter the RF95A RF modem and a phone modem to be connected to the CSI datalogger serial port all at the same time The CS I O port is a DB9 male voltage levels are TTL...

Страница 16: ...he proper time The one second GPS synchronization pulse is used to ensure a precise drift free carrier frequency See Section 6 3 for more information regarding GPS and GPS antenna placement 3 5 Power Connector The TX320 power connector has two pins ground and 12 V The input power requirement is 10 8 to 16 VDC at 3 amps Because the TX320 can use up to 3 amps the power should be connected directly t...

Страница 17: ...sistance Using the 24 AWG wire with 23 ohms resistance per 1000 ft 24 feet of wire battery power leads 12 ft long will prevent transmission A reliable system that will transmit without a perfect battery voltage will minimize voltage drop along the battery power leads To minimize voltage drop keep the battery power leads short A five foot power lead is a long power lead If you must have a longer le...

Страница 18: ...TX320 Transmitter FIGURE 3 2 TX320 connectors FIGURE 3 3 DCP enclosure 8 ...

Страница 19: ...itter The main menu is across the top of the screen and includes some file control functions a list of commands that can be sent to the transmitter and a couple of tools The edit window is where changes to the transmitter setups are to be entered and saved for later use 4 3 Making Edits Edits are made in the configuration window The configuration window has two columns use the right column for all...

Страница 20: ...ond increments 4 3 7 Timed Msg Format The Timed Message Format determines how the flag word is written and which characters are legal Select A if the data format is ASCII select P for Pseudo Binary option B has not yet been defined by NESDIS Please note The Timed Msg Format does not change the format of the data instead the flag word is changed The datalogger program determines the data format and...

Страница 21: ...ou want repeated after data has been loaded to the random data buffer Typically 3 works well 4 3 13 Random Data Format The Random Message Format determines how the flag word is written and which characters are legal Select A if the data format is ASCII Select P for Pseudo Binary option B has not yet been defined by NESDIS Please note The Random Msg Format does not change the format of the data ins...

Страница 22: ...indow use a standard serial or USB cable to connect the serial or USB port of the computer to the RS 232 or USB port of the TX320 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 The Terminal Window also supports automated commands found under Main Menu Commands 4 ...

Страница 23: ...ber of bytes that can be sent given the current configuration of the transmitter To calculate the maximum number of bytes that can be sent the transmitter looks at the data rate bits per second and the message window length To convert the number of bytes that can be sent to the number of data points that can be sent divide the number of bytes by 3 if using Pseudo Binary or by 7 if using an ASCII f...

Страница 24: ...site of how Edlog dataloggers arrange data There are five parameters to the GoesData instruction Result Code Data Table Table Option Buffer Control and Data format In GoesData Table Option Buffer Control and Data Format can be variables declared as type long Error checking is done at run time instead of compile time See Table 5 1 7 for runtime error codes Using CRBasic dataloggers time of Max Min ...

Страница 25: ...format options except 3 RAWS7 will support strings Strings are transmitted from the first character until the null terminator If strings contain illegal characters the TX320 will replace the character with another character By default the replacement character is an asterisk The replacement character can be changed Both the random and timed buffers of the TX320 can be set to accept ASCII or Pseudo...

Страница 26: ...rements and stores the result in the table named Tempdata All new data from TempData is copied to the transmitter hourly An hourly record containing stats regarding the Last GOES message are stored in another table declarations Public TCTemp Public PanelT Public battery1 Public RC_Data Public LastStatus 14 Alias LastStatus 1 RC_Last Alias LastStatus 2 Lst_Type Alias LastStatus 3 Lst_Bytes Alias La...

Страница 27: ...roblems that might arise The GoesStatus instruction also includes options to initiate a random transmission on command The GoesStatus instruction includes seven different functions Read Time Read Status Read Last Message Status Transmit Random Message Read Error Register Clear Error Register Return transmitter to on line mode GoesStatus expects two parameters The first is the array used to store t...

Страница 28: ...l next self timed transmission Hours 5 Time until next self timed transmission Minutes 6 Time until next self timed transmission Seconds 7 Bytes of data in random buffer 8 Time until next random transmission interval start Hours 9 Time until next random transmission interval start Minutes 10 Time until next random transmission interval Seconds 11 Failsafe 1 indicates transmitter disabled due to fa...

Страница 29: ...ude minutes 14 Longitude seconds 5 1 2 4 GoesStatus Read Error Register Example Public Errors 10 GoesStatus Errors 4 Command 4 Read Error Register is used to return the total number of errors that have occurred and codes describing the last four errors 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...

Страница 30: ...x value and converts to decimal Decimal values are placed in input locations The error codes are very important information if the DCP experiences trouble during operation Generally a GPS time synchronize fault should not cause concern but a GPS fault may cause a scheduled transmission to be missed The data will be sent on the next transmission if the instruction appends data to the self timed buf...

Страница 31: ...t does not guarantee a missed a transmission See Section 6 3 for GPS antenna information Error code 22 0x16 indicates a Standing Wave Ratio SWR Fault The SWR fault can be triggered by several different conditions High reflected power will trigger the SWR fault Reflected power is caused by poor transmission antenna and or antenna cable condition or wrong type of antenna or antenna cable See Section...

Страница 32: ...tion can be variables error checking is done at run time not compile time Using GoesSetup the custom display menu options and the datalogger keypad display programs can be written that allow TX320 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 store...

Страница 33: ... 5 1 7 GoesSetup and GoesData Runtime Result Codes Code Error Condition 11 Illegal Buffer Control 12 Illegal Message Window 13 Illegal Channel Number 14 Illegal Baud Rate 15 R count Error 16 Illegal Data Format 17 Illegal Data Format FP2_ASCII 18 Self Timed Interval Error 19 Self Timed Offset Error 20 Random Interval Error 21 Platform ID Error 5 1 4 2 Platform ID Platform ID is an eight character ...

Страница 34: ...string variable in the format of hh_mm_ss where hh and ss are usually zero and mm is 30 or 45 5 1 4 11 GOESSetup Example Public setup_RC setup Sub Gsetup GOESSetup setup_RC H12345677 10 195 300 0 100 0_01_00_0 0_16_20 1_0_0 If setup_RC 0 Then setup false EndSub BeginProg setup true Scan 10 Sec 0 0 If setup Then Call Gsetup NextScan EndProg 5 2 Edlog Programming This section only applies to the CR1...

Страница 35: ...d 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 The maximum number of data points that can be sent is estimated with this formula b a 2 8c total number of data points per transmission Where a window length in seconds b baud rate or bits s...

Страница 36: ...l storage area is active when data is written The amount of data copied to the transmitter and the order of data copied to the transmitter can be controlled by utilizing both final storage areas If using FS2 datalogger memory must be allocated to FS2 Final storage area 2 memory can be allocated using Edlog or the keypad 5 2 4 Sending Data to the Transmitter P126 Edlog instruction 126 is used to tr...

Страница 37: ... 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 Binary 18 bit integer data format requires 3 bytes per data point All data stored in the datalogger must be in high resolution All information right of the decimal place is truncated Data is transmitted as a signed two s compliment 18 bit integer Pre...

Страница 38: ...nt again 5 2 5 Read Status and Diagnostic Information from the TX320 Edlog instruction 127 P127 is used to read status and diagnostic information from the TX320 1 TX320 Status P127 1 0000 Status Command 2 0000 Result Code Loc _____ Parameter 1 Status Command 0 Read Time Uses four Input Locations 1 Read Status Uses 13 Input Locations 2 Read Last Message Status Uses 14 Input Locations 3 Transmit Ran...

Страница 39: ...ot available TABLE 5 2 2 P127 Command 0 Read Time In Loc Contents 1 Command Result Code 2 Hours GMT 3 Minutes 4 Seconds 5 2 5 2 P127 Command 1 Read Status Read Status Command provides information specific to the next scheduled or random transmission including the amount of data in the buffers and power supply voltage TABLE 5 2 3 P127 Command 1 Read Status In Loc Contents 1 Command Result Code 2 By...

Страница 40: ...ts green During transmission the LED lights red TABLE 5 2 5 P127 Command 3 Initiate Random Transmission In Loc Contents 1 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 Command 3 will pull the TX320 off line After the random ...

Страница 41: ... or too much data 0x04 04 Time out or too little data 0x05 05 Illegal parameter 0x06 06 Transmit buffer overflow 0x10 16 Message abort due to PLL 0x11 17 Message abort due to GPS 0x12 18 Message abort due to power supply internal 16 volt RF 0x13 19 Software fault 0x14 20 Failsafe fault 0x15 21 GPS time sync fault 0x16 22 SWR fault transmission antenna connection 0x19 25 Internal RF power supply fa...

Страница 42: ...o final storage once an hour and transfers data to the TX320 once every 4 hours Edlog Program Example 1 Set output flag high hourly 1 If time is P92 1 0 Minutes Seconds into a 2 60 Interval same units as above 3 10 Set Output Flag High Flag 0 Write a time stamp to final storage 2 Real Time P77 1 1221 Year Day Hour Minute Seconds midnight 2400 Write 41 input locations to final storage 3 Sample P70 ...

Страница 43: ...cial attention to winter sun angles 6 2 Transmission Antenna The TX320 transmission antenna is a right hand circular polarized Yagi with 11 dBic gain A bracket is included with the antenna for mounting to a mast or pole see Figure 6 1 The antenna is directional and should be aimed at the spacecraft Both elevation and azimuth are unique to the location on the planet and must be set A poorly aimed a...

Страница 44: ...he 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 6 3 2 GPS Antenna Location The GPS antenna mounts to the end of a crossarm via the 7623 3 4 in IPS threaded pipe and a 1049 NU RAIL fitting or CM220 mounting bracket see Figures 6 2 and 6 3 The ideal location for the GPS antenna is ab...

Страница 45: ...TX320 Transmitter FIGURE 6 3 GPS antenna 35 ...

Страница 46: ...TX320 Transmitter 36 ...

Страница 47: ...ers must also submit a written statement indicating that their sponsor requires all or part of the transmitted data NESDIS will fax or mail the user a question form to complete and submit for approval DCS Coordinator Federal Office Building 4 Suitland MD 301 457 5681 http dcs noaa gov contact htm 2 Following approval NESDIS sends a Memorandum of Agreement MOA The MOA must be signed and returned to...

Страница 48: ......

Страница 49: ...110 FOR I 1 TO J 120 DV I MID A 3 I 2 3 130 NEXT I 140 B RIGHT A LEN A 3 J 160 A B A 170 K INT LEN A 3 180 L J 190 FOR I J 1 TO L 200 DV I MID A 3 I J 2 3 210 NEXT I 270 FOR I 1 TO L 280 A ASC LEFT DV I 1 AND 15 290 B ASC MID DV I 2 1 AND 63 300 C ASC RIGHT DV I 1 AND 63 310 IF A 64 B 1008 THEN DV B 48 64 C 9000 GOTO 400 320 IF A AND 8 THEN SF 1 ELSE SF 1 330 IF A AND 4 THEN SF SF 01 340 IF A AND ...

Страница 50: ......

Страница 51: ...N X1 SQR X1 X1 1 B BR 1 01745329 115 GOSUB 300 120 A1 90 C R1 A1 01745329 130 S1 6378 AH 0003048 SIN R1 140 S2 35785 6378 S1 150 A2 180 A1 R2 A2 01745329 155 S4 SQR S1 2 6378 AH 0003048 2 160 S3 SQR S4 2 S2 2 2 S4 S2 COS R2 170 X2 SIN R2 S3 S2 180 ER ATN X2 SQR X2 X2 1 E ER 1 01745329 190 PRINT ANTENNA ELEVATION ANGLE E DEGREES 200 PRINT ANTENNA AZIMUTH ANGLE B DEGREES 210 PRINT PRINT PRINT HIT AN...

Страница 52: ......

Страница 53: ...62500 43 401 764000 22 401 764750 44 401 765500 45 401 767000 23 401 767750 46 401 768500 47 401 770000 24 401 770750 300 100 BPS Channels 1200 BPS Channels Channel Frequency Channel Frequency Number MHz Number A MHz 48 401 771500 49 401 773000 25 401 773750 50 401 774500 51 401 776000 26 401 776750 52 401 777500 53 401 779000 27 401 779750 54 401 780500 55 401 782000 28 401 782750 56 401 783500 5...

Страница 54: ...70 401 908750 140 401 909500 141 401 911000 71 401 911750 142 401 912500 143 401 914000 72 401 914750 144 401 915500 300 100 BPS Channels 1200 BPS Channels Channel Frequency Channel Frequency Number MHz Number A MHz 145 401 917000 73 401 917750 146 401 918500 147 401 920000 74 401 920750 148 401 921500 149 401 923000 75 401 923750 150 401 924500 151 401 926000 76 401 926750 152 401 927500 153 401 ...

Страница 55: ...13 402 037750 226 402 038500 227 402 040000 114 402 040750 228 402 041500 229 402 043000 115 402 043750 230 402 044500 231 402 046000 116 402 046750 232 402 047500 233 402 049000 117 402 049750 234 402 050500 235 402 052000 118 402 052750 236 402 053500 237 402 055000 119 402 055750 238 402 056500 239 402 058000 120 402 058750 240 402 059500 241 402 061000 121 402 061750 242 402 062500 243 402 064...

Страница 56: ...Appendix D GOES DCS Transmit Frequencies D 4 ...

Страница 57: ...inimum magnitude of 0 00001 NESDIS has placed restrictions on the format of data sent over the GOES satellite network The first restriction is the use of 7 data bits and one parity bit per byte The second restriction is the most significant data bit of each byte bit 6 is always set Without data each byte transmitted over the satellite has the format of p1xxxxxx The x s will hold the 6 bits per byt...

Страница 58: ...e positive data point conversion Byte Label byte 3 byte 2 byte 1 Actual data point 01000101 11110010 11010010 Drop first 2 bits of each byte 000101 110010 010010 Combine the 3 bytes into one word 000101 110010 010010 Convert from Binary to Decimal 23698 Example of a negative data point conversion Byte Label byte 3 byte 2 byte 1 Actual data point 01111010 11001101 11101101 Drop first 2 bits of each...

Страница 59: ...e deleted and the transmitter s attention is lost To get the transmitters attention a character must be entered followed by a CR until the prompt is returned Commands can optionally be terminated with CR LF in other words a LF character received following a CR will be ignored Each character entered is echoed to the host to allow for simple error checking and to support the terminal nature of the i...

Страница 60: ...t commands Two access levels are defined USER and TECHNICIAN An error will be returned if a TECHNICIAN level command is entered while at the USER command access level USER level commands are always available including when at the TECHNICIAN command access level The Technician level commands are not described here The command access level is changed by using the password protected TECHMODE command ...

Страница 61: ...d F 2 4 Restore Configuration Syntax RSTR Access level USER TX320 State Enabled Disabled This command directs the transmitter to restore the configuration parameters from non volatile memory Changes made to the configuration are not automatically saved to non volatile memory as they are entered This allows changes to be made and verified before committing them to permanent storage but provides the...

Страница 62: ...with valid values before transmissions can be enabled F 2 7 Disable Transmissions Syntax DTX Access level USER TX320 State Enabled This command disables transmissions Normal scheduling of transmissions is suspended Note that the transmitter is automatically disabled if configuration parameters are modified and must be re enabled with the ETX command to resume transmitting F 2 8 Read Configuration ...

Страница 63: ...5 00 to 24 00 00 A value of 00 00 00 will disable periodic GPS position fixes although they will still occur at power up and every 24 hours as a side effect of the daily automatic OCXO calibration The current value of the GPS fix interval is also reported by the RCFG command The parameter is non volatile when saved using the SAVE or ETX commands F 3 GOES Transmission Configuration commands The fol...

Страница 64: ...PS 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 and the preamble will be forced to Long Setting the channel number to 0 will disable timed transmissions F 3 3 Set Self Timed Transmission Bit Rate Syntax TBR bbbb Access level USER TX320 State Disabled This comm...

Страница 65: ...gth of the timed transmit window Length is specified in seconds Valid range is 5 to 240 seconds F 3 7 Enable or Disable Self Timed Transmission Message Centering Syntax CMSG Y N Access level USER TX320 State Disabled Center the timed transmission in the assigned window if Y otherwise transmit at beginning of assigned window F 3 8 Enable or Disable Self Timed Buffer Empty Message Syntax EBM Y N Acc...

Страница 66: ... i e 300 or 1200 BPS F 3 11 Set Self Timed Transmission Data Format Syntax TDF A P B Access level USER TX320 State Disabled This command sets the timed transmission format to ASCII Pseudo Binary or Binary Valid values are A P or B This parameter is used to determine the flag word in 300 and 1200 BPS transmissions Note It is the responsibility of the host to ensure the data provided for transmissio...

Страница 67: ...e randomizing interval is the interval in which a random transmission will occur if there is data in the random transmission buffer The actual transmission time will be random but on average will occur at this rate Valid range is 5 to 99 minutes F 3 15 Set Random Transmission Randomizing Percentage Syntax RPC mm Access level USER TX320 State Disabled This value determines the range of randomizatio...

Страница 68: ... Load Self Timed Transmission Buffer Syntax TDT xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Access level USER TX320 State Enabled This command overwrites the GOES Timed Buffer with the data provided The TX320 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 If the timed data format is ASCII or Pse...

Страница 69: ...ffer Syntax CTB Access level USER TX320 State Enabled Disabled Clears the timed transmission buffer F 4 5 Load Random Transmission Buffer Syntax RDT xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Access level USER TX320 State Enabled This command overwrites the GOES Random Buffer with the data provided The G5 transmitter will insert the 31 bit GOES ID any header information e g HDR Flag byte and appe...

Страница 70: ...smitted at the assigned bitrate the message will be truncated F 4 6 Read Length of the Message in the Random Transmission Buffer Syntax RML Access level USER TX320 State Enabled Disabled Returns the number of bytes stored in the random transmission buffer F 4 7 Read the Maximum Random Message Length Syntax MRML Access level USER TX320 State Enabled Returns the maximum number of bytes that can be t...

Страница 71: ... has been transmitted failsafe status and supply voltage The transmitter responds with Transmitter Enabled Disabled CR LF GPS On Off CR LF RTC Valid Invalid CR LF Time To Next Tx dd hh mm ss CR LF Timed Message Length nnnn CR LF Next Timed Tx N A or mm dd yyyy hh mm ss Random Message Length nnnn CR LF Random Message Tx Count nnn CR LF Next Random Tx N A or mm dd yyyy hh mm ss Fail Safe OK Tripped ...

Страница 72: ...If a transmission has not occurred since power up the transmitter will respond with No Tx Has Occurred F 5 4 Read GPS Status Syntax GPS Access level USER TX320 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 Almanac Available N PPS Output Stable N UTC Offset 0 00000...

Страница 73: ...with No GPS Fix CR LF F 5 6 Read Audit Log Syntax RAL Access level USER TX320 State Enabled Disabled The RAL command is used to retrieve the audit log information in the following format yy mm dd hh mm ss event message 1 CR LF yy mm dd hh mm ss event message 2 CR LF yy mm dd hh mm ss event message N CR LF Where yy mm dd hh mm ss are the date and time that the message was created event message x is...

Страница 74: ...olts This value is updated at the bit rate when transmitting and every 30 seconds when not transmitting F 5 11 Read TCXO Temperature Syntax RTEMP Access level USER TX320 State Enabled Disabled Returns the TCXO temperature PCB temperature in degrees C This value is updated at the bit rate when transmitting and every 30 seconds when not transmitting F 5 12 Read Measured Frequency Syntax RMF Access l...

Страница 75: ......

Страница 76: ...entific Canada Corp CSC 11564 149th Street NW Edmonton Alberta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A CSCC 300 N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc Campbell Scientific Ltd CSL Campbell Park 80 Hathern Road Shepshed Loughborough LE12 9GX UNITED KINGDOM www campbellsci c...

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