DSTS-5A/2C User`s Manual - Electronic Devices, Inc.
Contents
1. Starts the auto send mode Input and output pulse data such as frequency amplitude depth will be sent to the terminal each second 5 2 22 t enters the extended command mode A list of additional commands will be 5 2 23 vxxxx 5 2 24 zxxxx DSTS 5A 2C Manual sent to the terminal The extended commands are used in calibrating the DSTS 5A 2C Sets the velocity of propagation and stores the new value in eeprom to be loaded on power up The velocity of propagation should be set in ft sec if the units are in feet and m sec if units are in meters Default values for a new DSTS 4A 2C are 4800 ft sec and 1500 m sec Starting with the first cycle the period of each cycle up to cycle xxxx is sent to the terminal If z with no numbers is used then all the cycles of the input pulse frOm the first to last will be sent to the terminal This may take considerable time with a large number of cycles The data is comma delimited Page 4 Doc 010512C 6 TYPICAL OPERATING SCENARIOS 6 1 FISH ECHO 6 1 1 The DSTS 5A 2C is capable of generating a secondary echo between the surface and bottom This echo can be used to simulate an echo from a fish or other object above the bottom and will be referred to as a fish echo The depth duration and arch shape of the fish echo can be set The duration of the fish echo is set by specifying the number of echoes that the fish will generate as it passes under the transducer A more realistic fish echo can be g2. Go to Start run and type in the following c progdsts exe i COMx yyyyy hex where x is the connected com port and yyyyy is the name of the hex file update DSTS 5A 2C Manual Page 6 Doc 010512C Type the name of a program folder document or Internet resource and Windows will open it for you Open C ProgDsts exe i COM1 DSTS 54 HEX v M eee ee 8 1 3 Press the reset RST button on the DSTS 5A 2C and quickly click on OK Note that after a RST status led 2 stays on 5 seconds then gos off You must click the OK button while the status led 2 is on for the update to work successfully 8 1 4 If the update is running successfully you will see the following screen Command Prompt 2 x C gt C PROGDSTS i COM1 DSTS 5A HEX Reading Target Device ID Found PIC24HJ256GP266 lt ID x 71 gt Reading HexFile Reading Target Programing DEVICE ci dioccseacaaes sacs dacs ese secede mess nwetaaceena cee ee e ccme Done 9 INSTALLING A CUSTOM LOAD 9 1 Disassemble the DSTS 5A 2C by first removing the hex nut from the IN OUT BNC connector on the front panel Refer to illustration 1 and remove the black plastic outer bezel on the back panel the side with the RS 232 connector by lifting it near the center on the top and sides where the catches are located When the bezel is off hold the DSTS SA 2C so Illustration 1 Exploded view of DSTS 5A 2C the IN OUT connector is facing ho
3. case s in the Text to Send box and click on Send Text or press enter The characteristics of the sonar s transmitted pulse are displayed on the first line labeled Input and the output echo pulse data is displayed on the second line labeled Output 5 CONTROLLING THE DSTS 5A 2C 5 1 COMMAND STRUCTURE Most commands are a single alpha character followed by numbers For instance d250 followed by pressing the enter key will set the depth to 25 feet Some commands use two alpha characters The frequency shift command fn12 will decrease the reply frequency by adding 12 sample times to the reply period The command cm will change the depth calibration to meters Commands requiring a numerical input such as the depth will be shown as dxxxxxx showing that the command expects a string of up to 6 digits to follow Commands must end with a CR LF 5 2 COMMAND LISTING 5 2 1 b Restores normal operating mode Used when returning from CW mode Default setting 5 2 2 Bxxxxx Generates a continuous reply at the selected frequency B100000 produces an output frequency of 100KHz DSTS 5A 2C Manual Page 3 Doc 010512C 5 2 3 cf 5 2 4 cF 5 2 5 cm 5 2 6 dxxxxx 5 2 7 Dxxxxx 5 2 8 exx 5 2 9 Exx 5 2 10 fnxxx 5 2 11 fpxxx 5 2 12 gxx 5 2 13 ixx 5 2 14 T xxx 5 2 15 L xxx 5 2 16 P 5 2 17 p 5 2 18 r 5 2 19 R 5 2 20 s 5 2 21 S Depth units are set in feet Default setting
4. level depth and other characteristics for the fish and bottom echoes are controlled by data sent through the RS 232 port The included program DSTS_terminal exe or any terminal program may be used to control the DSTS 5A 2C 2 2 OPERATING THE DSTS 5A 2C WITHOUT A COMPUTER 2 2 1 When powered up without the RS 232 connection the DSTS 5A 2C will operate in the Q mode allowing a sonar to be evaluated based on the displayed depth The Q mode generates an echo amplitude based on transmitted power and depth The depth is incremented by one foot and the reply level is decreased each time the sonar transmits a pulse As the depth increases a point will be reached where the echo is no longer received The quality of the sonar can be read from the maximum depth reading before the echo is lost 3 CONNECTING THE DSTS 5A 2C TO COMPUTER 3 1 To install the supplied software copy the file DSTS_terminal exe to directory of your choice To run the program click on it and it will launch You must have a serial port USB serial adapter to use this EE EDIDSTS 5A Terminal Program 0 01 COM1 lt sout DATA in gt Disable Local Echd Data 1 0 window lt program 3 1 1 If you do not want to use the TE supplied software you can use xa any terminal program such as Microsoft HyperTerm The DSTS 5A 2C Manual Page 2 Doc 010512C parameters should be set for 9600 Baud 8 bit data no parity one stop bit Flo
5. Depth units are set in Fathoms Depth units are set in feet Set bottom depth in tenths of a depth unit i e feet fathoms or meters Set fish depth in tenths of a depth unit Fish echo will be off for xx input pulses Fish echo will be on for xx input pulses Adds xxx sample times to the reply period reducing the reply frequency accordingly New reply frequency is calculated and returned to the terminal Subtracts xxx sample times from the reply period increasing the reply frequency accordingly New reply frequency is calculated and returned to the terminal Adds extra cycles to the echo pulse to simulate pulse stretch g12 will add 12 cycles to the reply The frequency of the added cycles is the same as the frequency of the last cycle received from the sonar g0 is the default setting so echo length input length Sets the increment for the fish echo arch emulation in tenths of a depth unit Set the bottom echo amplitude from 0 to 255 Each number represents a 0 3dB change in level Set the fish echo amplitude from 0 to 255 Each number represents a 0 3dB change in level Additional 10dB attenuator is out of circuit Default setting Additional 10dB of attenuation is added to the reply level Re initializes the frequency averaging to the frequency of the next input pulse Resets depth to 24 ft reply level to max and Vprop to 4800f s Stops the auto send mode where the data is sent to the terminal at one second intervals
6. ET HI ELECTRONIC DEVICES INC P O BOX 15037 CHESAPEAKE VA 23328 PH 757 421 2968 FAX 421 0518 DSTS 5A 2C User s Manual EIH Electronic Devices Inc Chesapeake VA USA DSTS 5A 12G CHIRP SONAR TEST SET Cc Load Values s 2500V ate IN OUT A R R 560 Ohms 10W PACKING LIST OVERVIEW CONNECTING THE DSTS 5A 2C TO A COMPUTER CONNECTING A SONAR TO THE DSTS 5A 2C OPERATING THE DSTS 5A 2C TYPICAL OPERATING SCENARIOS CALIBRATING THE DSTS 5A 2C SOFTWARE UPDATES INSTALLING A CUSTOM LOAD SPECIFICATIONS AND WARRANTY INFORMATION DODNANRWN _ DSTS 5A 2C Manual Page 1 Doc 010512C DSTS 5A 2C User s Manual 7 79 1 PACKING LIST 1 1 The following items are included with the DSTS 5A 2C 1 1 1 Power transformer A 9VDC 300mA wall plug power adapter is supplied Nominal power requirements are 8 to 12 volts at 200 mA 1 1 2 A CD with software for controlling calibrating and updating the DSTS 4A 1 1 3 A user s manual 2 OVERVIEW 2 1 The DSTS 5A 2C sonar test set designed to work with chirp sonar and standard fixed frequency sonar sets 2 1 1 HOW IT WORKS When the transmitted sonar pulse is received it is digitized and the period of each cycle is measured and stored internally After a delay determined by the depth setting the reply pulse is generated from the stored data resulting in a echo that faithfully reproduces the frequency of the input pulse cycle by cycle 2 1 2 CONTROL All functions such as reply
7. cy counter must read 100 000Hz 10 Hz 7 1 5 REPLY AMPLITUDE CHECK 7 1 5 1 Connect a scope 1 megohm input required directly to the IN OUT connector with a short lt 3ft cable Set the frequency to 100 KHz f10000 and the level to maximum 1255 The voltage must read 112 mV p p 7 mV p p This is a fixed factory setting and will not change unless the DSTS 5A 2C has been damaged by a severe overload 7 1 6 OPTIONAL REPLY ATTENUATOR CHECK 7 1 6 1 Connect the DSTS 5A 2C IN OUT connector to a spectrum analyzer Set various levels to make sure the attenuator tracks properly Note that the output on the analyzer will be low because the 50 ohm input impedance of the spectrum analyzer loads down the DSTS 5A 2C output Ifa high impedance gt 100 000 ohm probe is available the readings will be correct and a level of 255 will produce 50 mV rms Each decrease in the level will reduce the output by 0 3 dB The object is to verify that the attenuator is operating properly There are no adjustments 8 SOFTWARE UPDATES 8 1 The DSTS 5A 2C software can be updated via your RS 232 connection As software features are added periodic update files in hex format may be sent via email They can be installed in the DSTS 5A 2C by using the supplied program progdsts exe 8 1 1 Put the progdsts exe program and the updated DSTS 5A 2C hex file in the same directory The illustrations assume the program and hex file are in the c directory 8 1 2
8. ely 120 Vp p at 500 Khz DSTS 5A 2C Manual Page 8 Accuracy 01 02 20 Hz 02 2 cycles 02 1 ms 10 Vp p 5 N A 01 02 01 1 0 dB 01 01 Doc 010512C Depth jitter less than 50 nSec maximum at second depth delay Baud rate 9600 8 bits no parity no handshake Power requirements 9 VDC 200 mA Size and Weight 6 W by 7 D by 3 5 H Shipping Wt 2 1 Lbs Depth jitter less than 50 nSec maximum at 1 second depth delay Baud rate 9600 8 bits no parity no handshake Power requirements 9 VDC 200 mA Size and Weight 6 W by 7 D by 3 5 H Shipping Wt 2 1 Lbs WARRANTY INFORMATION Unit will be repaired free of charge for one year from date of purchase providing there is no water damage or other evidence of improper use or handling Purchaser must ship unit prepaid to address below EDI will pay the return freight For repair please enclose a note describing the problem and ship to ATTN Service Department Electronic Devices Inc 3140 Bunch Walnuts Road Chesapeake VA 23322 USA Phone 1 757 421 2968 DSTS 5A 2C Manual Page 9 Doc 010512C
9. enerated by specifying a depth increment The depth of the fish echo is decreased for half the duration then increased for the remainder of the duration If the increment is set to zero the fish echo will remain at a constant depth for its duration 6 2 SETTING UP A TYPICAL FISH ECHO 6 2 1 Set the bottom depth to 25 feet by typing d250 enter Set the fish depth to 23 feet by typing D230 enter Set the fish echo off time to 20 pulses by typing e20 enter Set the fish on time to 3 pulses by typing E3 enter and the fish echo will appear for 3 pulses every twenty pulses and repeat until disabled by typing e enter 6 2 2 The amplitude of the fish echo can be set using the L command 6 2 3 To make the fish echo stay on continuously type E enter Type e enter to turn the fish echo off 6 2 4 To generate a fish arch use the i command to enter an value in tenths of the selected units representing the arch height 66299 1 7 CALIBRATING THE DSTS 5A 2C 7 1 The load resistor can change if overheated by too much power A large change in the resistance will cause the voltage and reply readings on a sonar to change The load resistor should be checked any time abnormal readings are experienced 7 1 1 Check the load resistance with the DSTS 5A 2C power off Place an ohmmeter across the IN OUT connector The resistance for the factory installed load should be 582 ohms 10 The resi
10. stance of a custom load at the IN OUT connector should read 22 ohms higher than the value of the installed load resistor If the load is out of spec the unit should be taken apart and the load resistor replaced before any further calibration or checks are done 7 1 2 Run the supplied terminal program DSTS_terminal exe 7 1 3 VOLTMETER CALIBRATION Caution Do not perform this procedure without a EDI DSTS calibrator or other comparable pulse source 7 1 3 1 The volt meter calibration is in the extended menu Type t to enter the 1 The EDI DSTS Calibrator produces a 400 volt p p pulse burst with a frequency of 204 8 KHz length of 325 uSec and a period of 80 mSec Droop is less than 10 percent DSTS 5A 2C Manual Page 5 Doc 010512C extended menu Then type c to start the voltmeter calibration routine Connect the EDI DSTS calibrator or other comparable pulse source to the IN OUT connector After the indicated voltage readings have settled down type in the correct input pulse voltage in volts peak to peak and press enter A calibration factor will be generated and stored in eeprom Press the reset button and check that the voltage reads correctly If not repeat the calibration 7 1 4 FREQUENCY CHECK Connect the DSTS 5A 2C to a frequency counter and press the reset button Set the output to continuous frequency of 100 KHz by typing B100000 followed by enter Set output level to maximum by typing 1255 The frequen
11. using upwards and slide the back panel out of the housing Save the two lock washers located on the IN OUT BNC connector and be sure to replace them during re assembly Note Do not remove the front bezel The front panel should not be removed only the back panel 9 2 Install the new load resistor R24 and a parallel capacitance C31 if required Be sure to move the jumper J5 to the position closest to the front panel DSTS 5A 2C Manual Page 7 Doc 010512C 9 3 Re assemble the DSTS 5A 2C making sure the two lock washers are in place on the IN OUT connector If necessary bend the ground contact slightly so it contacts the front panel when the unit is assembled Photo 1 DSTS 5A 2C Circuit Board 10 DSTS 5A 2C SPECIFICATIONS Parameter Sample rate Input frequency Input width Input period Input voltage Min input level Output frequency Output width Echo depth Output level Vprop ft fm Vprop mtrs 2 3 4 5 Usable to gt 550 Khz with reduced amplitude accuracy Range 40 Mhz 1 5 to 500 KHz 1100 cycles max 10 to 9999 ms 50 to 2500 Vp p 50 Vp p 1 5 to 500 KHz Tracks input pulse Resolution n a 25nS 0 1 us 1 ms 2 Vp p N A 25nS 0 1 us 1 to 100 000 ft fm mt 0 1 unit 2uV to 50 000uV 4800 to 5000 f s 1460 to 1530 m s 0 3dB 1 f s 1 m s Specified for constant frequency pulse with width greater than 100 uS Measured at 200KHz 400Vp p with a 325 uSec pulse width At 50 Khz Approximat
12. w control should be set to none 3 2 Connect the DSTS 5A 2C to the computer using a standard 9 pin RS 232 cable Connect the wall transformer power supply Status LED 2 will light for six seconds and the status LED s will sequence one time After power up the status LED 3 will glow and pulse at a one second rate indicating the DSTS 5A 2C is ready for operation 3 3 Run the DSTS 5A 2C Vxxx exe program If everything is connected correctly the terminal should display a row of numbers while the DSTS 5A 2C transmits data every second 4 CONNECTING A SONAR TO THE DSTS 5A 2C 4 1 Connect a sonar to the IN OUT connector Do not connect sonar to the Trig Out connector or the DSTS 5A 2C will be damaged If the sonar has a balanced output one of the two balanced output wires may need to be connected to the shield and grounded Consult the manufacturers manual to determine if one wire and the shield can be used as ground without damaging the sonar If you are unsure of the correct connections for a balanced output use the EDI BAL 550 accessory The BAL 550 is a balanced to unbalanced transformer that has connections for the shield and two wires and converts the balanced input to a ground referenced output The output of the BAL 550 connects to the DSTS 5A 2C A short BNC to BNC cable is required 4 1 1 Apply power to the sonar When the sounder transmits the red status LED will blink indicating that a pulse has been received 4 1 2 Type a lower
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