Magnacom® MAG-1003PS User Guide (rev. E)
Contents
1. RC SW 6 multi battery smart charger connect it Fig 4 2 to the diver unit s EM Hi Use connector and plug the power input cord Fig 4 1 into the AC power source Refer to the RC SW 6 user s manual for more information Key to Fig 3 1 Charger s Hi Use connector 2 Transceiver s Hi Use connector use e MAGNACOM AD 5 Figure 3 RCS 3U HIU Battery Charger Key to Fig 4 1 A C power cord p n 606003 000 2 Charging cable adapter p n 914074 000 Figure 4 RC SW 6 Multi battery Charging Station 12 SECTION 5 MAINTENANCE amp HELPFUL HINTS 5 1 GENERAL The MAG 1003 PS is virtually maintenance free and should give you many years of service The following should be done after each day of use in a marine environment 1 Freshwater rinse the unit to remove debris A mild soap solution can be used but rinse it with freshwater after cleansing Note Do not rinse the headset It is not waterproof 2 Dry the transceiver with a clean towel 3 Store it in a dry safe area 5 2 PERIODIC MAINTENANCE The transceivers should have the following service performed periodically 1 Clean and lightly grease the main housing o ring Check the o ring for cracks or damage If there is any evidence replace it PMS Replace the o ring yearly 2 Keep t2. The MAG 1003 PS can transmit to and receive from other MAG 1003 PS transceivers as well as Magnacom series diver units e g MAG 1003D MAG 1004HS or the MAG 1001S surface unit when on the same frequency and within range Other compatible transceivers include the standard Buddy Phones e g XT 100 MKII BUD MTS BUD SCU BUD OR BUD DSI BUD OTS BUD the Aquacom SSB 2010 SSB 1001B and SSB 2001B 2 diver units and the SP 100D and Aquacom STX 101 and STX 101M surface units SECTION 3 ADJUSTMENT amp OPERATING INSTRUCTIONS 3 1 GENERAL This section contains information for operating the Magnacom MAG 1003 PS through water transceiver 3 2 INSPECTION OF EQUIPMENT Upon arrival of the equipment inspect the shipping container for dents gouges or any other evidence of rough handling The Magnacom transceiver should be visually inspected upon removal from the shipping container If any damage is evident immediately file a claim with the carrier Forward a copy of the damage claim to OTS Santa Ana CA Arrangements for repair or replacement will then be made NOTE Although the MAG 1003 PS is rugged in design exercise care to ensure that problems are not caused by improper handling Store the unit in a safe secure area after unpacking it 3 3 OPERATING PROCEDURES STEP 1 Ensure the batteries are charged and all o rings are free of debris and in good condition STEP 2 Ensure all internal settings are properly adjusted sq
3. adjustments are available These adjustments allow the user to define sensitivities of the VOX and squelch systems adjust listening volumes and change channels Because no standards for design of full face masks have been established virtually all full face masks have different internal designs Some designs have little room for microphone installation which makes it necessary to have a more sensitive setting These advanced adjustments offer the user more options When VOX is selected your transceiver will give you a setting that is either the factory preset or the custom user setting If you find that you need more or less sensitivity you can easily change the settings The adjustment controls are located inside on the bottom of the upper electronics module The controls include level controls VOX side audio volume etc and a rotary switch for changing channels Fig 5 6 2 vox The VOX sensitivity control is labeled VOX on the bottom of the electronics compartment and can be observed after removing the lower battery compartment The VOX control Fig 5 1 can be rotated two times before stopping Rotation in the clockwise direction increases the sensitivity If a VOX high setting is too sensitive causing false triggering rotate the control counterclockwise until a good setting is found see Fig 6 for an illustration of the effect of rotating the adjustment control CAUTION Do not force the control past the stop point o
4. controls on the bottom of the electronics module Adjustments will be discussed fully in Section 6 Advanced User Information 2 4 VOICE OPERATED TRANSMITTER VOX VOX operation provides hands free communications The user simply talks for the unit to transmit automatically The VOX sensitivity needs to be set according to the 3 1 2 3 4 5 6 7 8 9 3SN IH x1 L1 HI USE MAGNACOM 4 7 SINGLE SIDEBAND ACOUSTIC TRANSCEIVER MILITARY Record out plug Hi Use to headset charging connection Red LED Dust cap MS female connector Transformer inductor Electronics module Strike Spring battery contacts Figure 2 MAG 10 55 d 10 O ring p n 283002 000 11 RB 14 battery pack p n 910272 000 12 Latch 13 Battery housing 14 Male MS connector 15 TA 25B 55 high power transducer as sembly 16 Push to talk button 17 Boom microphone 18 THB 13 headset 03 PS System Components 4 diver s voice If the VOX is not adjusted properly false transmission or inability to transmit may occur If the user is in the VOX mode he can override it by using the PTT control Overriding the VOX mode via the PTT switch automatically switches the transceiver to the
5. for intended use and the user assumes all risk and liability whatsoever in connection therewith Neither Seller nor Manufacturer shall be liable either in tort or in contract for any loss or damage direct incidental or consequential arising from the use of or the inability to use the product No statement or recommenda tion not contained herein shall have any force or effect unless it is in an agreement signed by officers of the Seller and Manufacturer IMPORTANT SAFETY NOTICE Please read before using product It is absolutely essential that all operators are properly trained and equipped and fully understand this user s manual before attempting to use the MAG 1003 PS portable surface transceiver While the MAG 1003 PS provides good underwater communications it does not change or eliminate the potential hazards of diving Refer to the Library page of our Web site www otscomm com for a list of any changes made to this manual since its publication Copyright 2004 2011 by Undersea Systems International Inc dba Ocean Technology Systems All rights reserved Specifications are subject to change without prior notice 506104 000 E Section 1 Introduction elei Be Ee Be ARE Be RA Be SERE Ge Ge Ge Ee ss 1 lil Generals snina OE iid EE mime teens 1 1 2 Specifications EE ET EE EE RS 2 Section 2 Equipment Description 3 2 1 General Dese
6. lower battery 13 sections An o ring 10 between the sections serves to maintain the housing s watertight integrity Stainless steel latches 12 maintain a constant pressure that pre loads the o ring and prevents leakage Note The upper and lower housings are a matched set Do not mix them up with those of other transceivers 2 3 TRANSCEIVER ADJUSTMENTS The MAG 1003 PS provides adjustment controls for squelch SQ voice operated transmitter VOX sensitivity receive volume RV side audio ST intercom volume IV and channel selection Most adjustments are made on the surface not while diving There are two options for transmission VOX voice activation and push to talk PTT The sensitivity control for the VOX is a two turn level control located on the bottom of the upper electronics housing Figure 5 in Section 6 This adjustment must be made ina dry environment To switch from VOX to PTT or vice versa simply depress the PTT button on the headset three times within 2 seconds You will hear a long tone indicating VOX or a short tone indicating the PTT mode For more information refer to Section 3 4 2 Transmit VOX or PTT All two turn adjustment controls for squelch sensitivity side audio volume receive volume and VOX sensitivity as well as the switch for channel selection are located on the bottom of the upper electronics module To access these controls remove and set aside the lower battery housing and locate the
7. or may introduce destructive interference The bending ofthe sound waves by temperature variations also has a great effect on the sound intensity at points remote from the source If the source of the sound is near the surface there is some point beyond which sound is not received from the source This point is said to be in a shadow zone The distance from the source to the shadow zone is determined by the rate of change of temperature with depth the depth of the source and the depth at which the reception is made Fig 8 722 WATER DENSITY In addition to these factors water density is also important Because the density of sea water varies with the temperature the salt content and the static pressure the effect on sound of each of these three factors is usually considered separately 72 3 WATER TEMPERATURE Variations in water temperature affect sound transmission most In some areas of the ocean the temperature changes at a fixed 18 AA LA N LU VAAS NAAS A A AA SUM b ass gt Z m _ N d 1 E Siem ET fe e a Bu P dd gt mm a THERMOCLINE Figure 8 Thermoclines affect the ultrasonic signal Divers must report thermocline depth s so the surface transceiver and or other divers can be as close to the same depth as possible rate over large ranges of depth If the temperature increases with depth at a fixed rate the velocity of sound increases at a rate constant with depth and s
8. this is Sub we expect you in seven minutes Out IMPORTANT SAFETY NOTES It is absolutely essential for all divers to be properly trained and equipped before responding to distress emergency and safety calls WARNING Under no circumstances should a diver begin an ascent while holding his breath air embolism may occur SECTION 4 BATTERIES amp CHARGING With the MAG 1003 PS are provided one RB 14 nickel metal hydride NiMH rechargeable battery pack and an RCS 3U HIU smart charger Fig 3 OTS offers an optional charger the RC SW 6 Fig 4 for charging up to six RB 14 batteries at a time Note Due to the self discharge characteristics of Nickel Metal Hydride NiMH batteries they should be charged upon receipt of the unit and at least once a month to maintain service life The RB 14 NiMH battery pack delivers greater capacity than a NiCad battery pack It also does not suffer from memory defect as does a NiCad battery pack Note The battery you receive may have upgraded specifications from what is stated in this manual Due to advancing battery technologies we continually upgrade our batteries and chargers Contact OTS or your local OTS dealer to find out the latest available battery and charger 4 1 BATTERY INSTALLATION OR REPLACEMENT To install or replace the batteries follow these steps refer to Figure 2 with the indicated item numbers 1 Locate the latches on the sides of the MAG 1003 PS lower hou
9. 1 Figure 2 MAG 1003 PS System Components 4 Figure 3 RCS 3U HIU Smart Battery Charger 12 Figure 4 RC SW 6 Multi battery Charging Station 12 Figure 5 Adustment Controls eet te decent 15 Figure 6 Effect of VOX Adjustment on VOX Sensitivity 16 Figure 7 Effect of Squelch Adjustment on Squelch Sensitivity 17 Figure 8 Thermoclines Affect the Ultrasonic Signal 19 Figure 9 Water Current Dead Zone emere 20 Figure 10 Communication Through Indirect and Direct Paths 21 iii SECTION 1 INTRODUCTION Congratulations You have just purchased one of the finest state of the art underwater communication systems available The Magnacom MAG 1003 PS special warfare portable surface unit is a 70 watt ultrasonic single sideband transceiver designed for surface operation to allow surface to diver and vice versa through water voice communications The MAG 1003 PS employs advanced Digital Signal Processing DSP techniques which ensure the highest quality intelligibility possible Standard features include automatic electronic switching between VOX and PTT voice operated transmission VOX or push to talk PTT mode dual channels a heavy duty housing 70 watts of power and more In all the MAG 1003 PS is the best choice if your application calls
10. 3 8 Examples of Underwater Communication 10 3 8 1 Calls Between Surface Subs or Divers 10 3 8 2 Calls Between Divers and Surface Subs or Bells 10 Section 4 Batteries amp Charging 11 41 Battery Installation or Replacement eene 11 TABLE OF CONTENTS 42 Battery Charging u aes eene mb Su ua ays 12 Section 5 Maintenance amp Helpful Hints 13 ECCE 13 5 2 Periodic MaI enanee y suan app m aan ee Gee 13 5 3 Helpful Fits EE rt me hr OE 13 Section 6 Advanced User Information 15 ob Genefalo ecrit periere tem reset n ED rues 15 O2 MODE hint Gh tan cies Sie emm 15 6 3 ER EE EE ER ae antenatal 16 Section 7 Basics of Sound in Water 18 T Background EE rere devant ener 18 7 2 Factors That Affect Sound in Water sess 18 72 1 EE ER EE N 18 2 2 Water DENSI EE Uo cs sees eet 18 123 Water Temperature eene tete 18 124 Background NOis u na DPI eO 20 12 5 Zonesof Silence eee eerte tees 20 Limited Warranty esee ee ee Ee esee Be Ee tenen neta sensa SEE Ge EE GE Ge sensa sun 24 Illustrations Figure 1 MAG 1003 PS System
11. AII divers should stay within that depth and the surface station should try to position the surface transducer below or above whichever is the case Fig 8 7 2 4 BACKGROUND NOISE Marine organisms play an important role in underwater acoustics They are important primarily because ofthe effect they have on sound transmission but they often serve as sources of underwater noise as well High background noise whether man made animal or environmental waves or rain can interfere with good communications Such background noise can be suppressed through the use of the squelch function and thermoclines 72 5 ZONES OF SILENCE Large natural or man made objects can block acoustical transmission under certain conditions in much the same way that a rock blocks a fast moving current of water Close to the backside of the rock in this example the current is absent and the water seems still A short distance away the current is flowing again Fig 9 Similarly acoustic energy in the water can be blocked if the transmitting source WATER CURRENT N Figure 9 Water Current Dead Zone is close to a large object On the backside of the blocking object a zone of silence is formed in which reception of the transmitted signal is not possible Divers can reduce zones of silence by moving away from around or above the blocking object until communication is reestablished Fig 10 Mostsingle sideband signals are efficient enough to
12. CHNOLOG P o 0 x e t 5B c HNOL TEXTE MAG 1003 PS SINGLE SIDEBAND ACOUSTIC TRANSCEIVER PORTABLE SURFACE UNIT MILITARY MAGNACOM SINGLE SIDEBAND ACOUSTIC TRANSCEIVER TECHNOLOGY IN DEPTH NOTICE This manual and the information contained herein are provided for use as a main tenance and operation guide No license or rights to manufacture produce and or sell either the manual or articles described herein are given Undersea Systems International Inc dba Ocean Technology Systems hereinafter referred to as OTS reserves the right to change specifications without notice We recommend that all users read and fully understand this manual before using the Magnacom MAG 1003 PS portable surface transceiver All statements technical information and recommendations herein are based on tests we believe to be reliable but the accuracy or completeness thereof is not guar anteed and the following is made in lieu of all warranties expressed or implied including the implied warranties of merchantability and fitness for purpose Seller s and Manufacturer s only obligation shall be to replace such quantity of the product proved to be defective Before using the user shall determine the suitability of the product
13. PTT mode Tests have shown most divers favor the PTT mode over the VOX mode Note Adjust the VOX control fully clockwise Section 6 2 VOX and adjust the boom microphone so it is no farther than 1 4 inch from the user lips 2 5 PUSH TO TALK PTT SWITCH A unique feature of the MAG 1003 PS is its ability to be electronically switched between the VOX and PTT modes The PTT button is located on the headset s ear cup Fig 2 16 With the PTT mode the user simply presses the button to transmit The system automatically returns to the receive mode upon release of the PTT button The PTT function overrides the VOX function The PTT button is also used to switch the transceiver from VOX to PTT and vice versa Refer to Section 3 4 1 Push to Talk PTT Button for further instructions 2 6 SQUELCH SQ The squelch provides a means to limit the background noise heard by the user The best setting will depend on the specific requirements of the dive If long range is desired minimal or no squelch should be used If working close range to other divers and or another surface station an increased setting can be used For most operations a setting of one half turn counterclockwise from fully clockwise is optimal 2 7 SIDE AUDIO VOLUME ST When you transmit you will hear yourself via your earphone This is called Side Audio Sidetone ST It is useful for verifying that you are transmitting Some full face masks or helmets may hav
14. anship for a period of one year from the time of purchase Our obligation under this warranty is limited to the replacement of any part or parts that prove to our satisfaction to have been defective and that have not been misused or carelessly handled Labor is warranted for one year from time of purchase The complete unit and or part must be returned to our factory transportation charges prepaid We reserve the right to decline responsibility where repairs have been made or attempted by other than an Ocean Technology Systems factory trained service center or properly trained personnel In no event shall Ocean Technology Systems be liable for consequential damages Undersea Systems International Inc dba Ocean Technology Systems 3133 West Harvard Street Santa Ana CA 92704 USA Toll free 800 550 1984 Telephone 714 754 7848 Fax 714 966 1639 ots otscomm com www otscomm com You can now register your product online at the OTS Web site Just visit http www otscomm com register 1 html Copyright 2004 2011 by Undersea Systems International Inc dba Ocean Technology Systems All rights reserved Specifications subject to change without prior notice
15. e a configuration that causes feedback between the microphone and earphones If this occurs a lower setting is desired 2 8 RECEIVE VOLUME RV All wireless received audio is called Receive Volume RV Each diver hears somewhat differently and may prefer a loud or soft listening volume A clockwise turn increases the volume 2 9 DUAL CHANNEL SELECTION The MAG 1003 PS has the capability to operate on two different frequencies We refer to these as channels Having the ability to select between channels is a feature useful for dive teams who have more than one group The channel select slide switch is located on the bottom of the upper electronics housing and is labeled A and B Refer to Section 3 4 3 Channels for more information 5 The more efficient channel is A because transducers have a peak output over a narrow band of frequencies The transducer output has been optimized for 28 5 kHz lower sideband which will give you the longer range Channel B is 32 768 kHz upper sideband IMPORTANT NOTE Ensure all the transceivers are on the same channel before using the unit 2 10 HEADSET WITH BOOM MICROPHONE The THB 13 headset part no 910019 007 is provided with the standard MAG 1003 PS This headset employs a push to talk PTT switch located on the side of the earphone cup The microphone is noise canceling and must be no farther than 1 4 inch from the user s lips when he speaks 2 11 COMPATIBLE SURFACE DIVER TRANSCEIVERS
16. for a rugged high quality portable surface transceiver 1 1 GENERAL This manual contains information about the Magnacom MAG 1003 PS underwater communication system including most support equipment The MAG 1003 PS with headset and transducer assembly is illustrated in Figure 1 3SN IHI Figure 1 MAG 1003 PS System 1 2 Nominal Range Acoustic Output Power Audio Frequency Response Receiver Sensitivity Automatic Gain Control Adjustment Controls Adjustment Tool Transmitter Activation Frequencies Battery Life Battery Type Low Battery Indication Transducer Headset Boom Microphone Operating Temperature Storage Temperature Connector Types Housing Housing Dimensions Transducer Cable Length Battery Chargers PEP peak envelope power SPECIFICATIONS gt 6000 m in calm sea 1000 m in sea state 6 on Channel A Note Environmental variability such as that caused by biological noise and interference thermoclines etc can reduce range 70 watts PEP on Channel A 300 4000 Hz 110 dBv 120 dB dynamic range 2 turn level controls located on the upper housing must remove lower battery compartment Small jeweler type flathead screwdriver used to adju
17. ged to proper depth at least six feet below the surface 3 6 RECEIVING A MESSAGE When the transceiver is first turned on it is in receive mode and remains that way as long as the PTT button is not depressed or the VOX function is not activated When receiving a transmission relax and concentrate on hearing 3 7 DOFFING THE UNIT 1 Disconnect the Hi Use connector from the headset and the MS connector from the transducer Doing so will deactivate the unit s power 9 2 Ifthe unit is wet as soon as possible after use rinse the unit in freshwater to remove salt and other mineral deposits Note Do not rinse the headset It is not waterproof 3 Although the MAG 1003 PS is ruggedly constructed for long life in the marine environment we strongly recommend that you place it in a protective carrying case between uses and take special care to avoid damaging the transducer 3 8 EXAMPLES OF UNDERWATER COMMUNICATION 3 81 CALLS BETWEEN SURFACE SUBS OR DIVERS DIVER A Red Diver this is Blue Diver do you see the wreck yet Over DIVER B Blue Diver this is Red Diver yes I see the wreck it s ten yards to your right Out 3 8 2 CALLS BETWEEN DIVERS AND SURFACE SUBS OR BELLS DIVER A Topside this is Blue Diver how far am I from the dive boat Over SURFACE Blue Diver this is Topside I see your bubbles 50 feet off my port bow Out DIVER A Sub this is Blue Diver how long before I must lock in Over SUB B Blue Diver
18. hange between channels A and B open the housing find theslide switch located on the electronics module and placethe switch in the desired position Note Channel A is more efficient for long range communication 3 4 4 SQUELCH ADJUSTMENT Open the housing and locate the squelch control A fully counterclockwise position disables the squelch This setting is recommended when it is critical that all communications are received It ensures reception of all signals even those buried in background noise Signals so weak thatthey are marginally detectable will never un squelch a unit For very long range communication the squelch control must be set fully counterclockwise If the system is operated at close range and this range will never be increased a setting of one and a half turns clockwise is good for close quarter environments e g SDV training operations 3 4 5 VOLUME ADJUSTMENT Receive RV side audio ST and intercom IV volume adjustments are made inside the electronics module A clockwise turn increases the volume See Figure 5 in Section 6 Advanced User Information 3 5 PRE DIVE CHECKLIST Fully charged RB 14 NiMH battery pack installed see Section 4 O rings in place clamps secure Headset with boom microphone within 1 4 inch of tender s lips Row Ne Pins sockets of Hi Use connector are lightly greased and connectors are properly mated e Operator dressed out so wires will not snag 6 Transducer submer
19. he transducer clean especially from grease Grease decreases performance 3 Verify the battery springs are in good order and are making good contact with the battery pack 5 3 HELPFUL HINTS Underwater communication is auseful ability and can save lives when used properly Training is important and a must for new users The following are a few helpful hints Please review them and consider them when writing your training plan 1 Conduct initial underwater training in a controlled area such as a swimming pool 2 Speak slowly and pronounce each word clearly 3 Listen for a break in conversation if others are communicating in the area Identify whom you are calling and then identify yourself Continue speaking until the message is complete At the end of each message say OVER if a response is required and OUT if no response is required 4 If working in a pool make sure the pool does not have a bad or noisy pump 13 10 11 12 13 14 This would create numerous tiny bubbles that would reduce the range the bubbles can form around the MAG 1003 PS transducer Ifafter a few minutes you see tiny bubbles like carbonation gathering on the diver s hands or dive gear move to a new location If the pump is generating a lot of noise secure it during the test Make sure the microphone element is less than 1 4 inch from your lips Ensure all batteries are charged before starting the dive operation Bef
20. he vibrating diaphragm the acoustic energy in the water will excite mechanical vibrations in the second diaphragm These vibrations may be detected by electrical means to complete a flow of mechanical energy from the first diaphragm to the second The first diaphragm is called the source or transducer and the second is called a receiver or hydrophone In Magnacom systems the transducer and hydrophone are one and the same 7 2 FACTORS THAT AFFECT SOUND IN WATER There are many factors that affect the propagation of sound in water All of these factors vary depending upon location depth and time of day The net result is that communication in water can be affected by local conditions and the kind and depth of dive being conducted Fluctuations in range and intelligibility are to be expected 721 DISTANCE The sound intensity from a source varies inversely with the square of the distance from the source This sort of variation is referred to as spherical spreading Other factors also influence the variation of sound intensity with distance As the sound passes through the water some of the energy is absorbed and converted to heat attenuation and some of the energy is scattered by fish pilings seaweed bubbles etc diffraction In addition both the surface and bottom may affect the sound intensity by reflecting sound back into the water The sound reflected by the surface and bottom may raise the intensity above normal levels reinforcement
21. on 3 4 Adjustments for instructions if necessary Note The factory defaultsquelch setting should be appropriate for most operations STEP 7 Repeat the above procedures with any other surface transceiver and verify that it is operational and on the same channel STEP 8 After you have verified that all transceivers are on the same channel all settings are to the diver s liking the batteries are fully charged and the o ring was installed properly and is clean of debris you are ready to operate the unit NOTE The units will always start in PTT mode after powering down or up STEP 9 Submerge the transducer to a minimum of six feet below the surface 3 4 ADJUSTMENTS The MAG 1003 PS has a unique feature that allows you to adjust the VOX PTT functions electronically either out of or in the water If you depress the PTT button three times within two seconds you will hear in your earphones either a two tone beep sequence or a short beep A two tone beep sequence indicates the unit is entering VOX mode A single tone indicates the system is entering PTT mode Note The system requires three distinct presses If the three presses are done too quickly 1 e three times within second or less then the system may not switch modes 3 44 PUSH TO TALK PTT BUTTON The PTT button serves two purposes 1 When pressed and held it activates the transmitter As long as you hold the PTT button you will be transmitting When you release the b
22. ore the divers enter the water check to make sure they have not covered their units transducers with any type of dive gear Make sure all wires on the divers and MAG 1003 PS surface unit operator are dressed to avoid snags while diving or operating the surface unit Designate one diver as the lead communication diver so the divers will not be trying to answer questions at the same time Brief the divers that after entering the water especially if making a jump they should make eye contact with the dive supervisor and establish communications In initial training talk to only one diver at a time until he establishes clear communications After the divers are comfortable have the divers talk to each other It is a good idea for everyone to agree on Channel A or B before the dive starts and to ensure everyone is on that channel If you feel a thermocline report the depth to other divers and topside Topside should adjust the transducer depth accordingly Surface units within range can communicate in open water or harbors thereby avoiding the sometimes crowded and less private channels Crews of submarines or bells can communicate with one another or with surface units in much the same way We recommend that standard radio telephone procedures be used in all communications 14 SECTION 6 ADVANCED USER INFORMATION 6 1 GENERAL Although the MAG 1003 PS is designed such that minimal manual adjustments are necessary custom user
23. ound waves are refracted toward the surface If however the temperature decreases with the depth as is frequently the case the velocity of sound decreases with depth and the waves of sound are bent downward There are also areas in the sea where at some depth temperature changes rapidly over a small depth range Such a layer is referred to as a thermocline or thermal layer Such layers in addition to producing rather sharp bending of the sound waves by refraction effects can serve as reflecting surfaces The velocity of sound transmission changes only about one percent for a temperature change of 10 F However the resultant bending of the sound path has great effect over a distance of several hundred yards If the temperature of the water decreases with depth at the rate of 1 F for each 30 feet starting at the surface most of the sound energy originating at the source near the surface will travel along paths that are bent rather sharply downward Therefore the sound energy may not reach a shallow detector positioned 1000 yards from the source but may reach a deeper detector position further from the source Greater 19 temperature variations can cause these paths to bend more sharply The best method to deal with thermoclines is to bring the divers and or transducers as close to each other as possible If a diver enters a thermocline he should report it to everyone surface and divers so they know the depth of the thermocline
24. permit communications around blocking objects Reception is made mainly through surface and bottom reflections Man made noise may be present underwater in busy harbors shipping lanes and many coastal locations particularly at lower frequencies The outstanding characteristic of this coastal ambient noise is its great variability from place to place in the same harbor and from time to time at the same place 20 SURFACE TRANSDUCER boo Figure 10 Communication through indirect and direct paths Note kelp scattering sound Without surface and bottom bounce the diver would lose communica tions Under some conditions when your diving suit is directly between the transmitting source and your Magnacom transceiver a small zone of silence may be created that prevents reception This effect becomes greater at longer ranges Turning ap proximately 45 degrees in any direction eliminates this zone of silence Since most divers are in constant motion it is unlikely that anything more than a momentary signal loss would occur when acoustic energy is blocked by air inside a dry suit by gas bubbles within neoprene wetsuit material or when both are present such as with a partially inflated dry suit 21 NOTES 22 NOTES 23 Undersea Systems International Inc dba Ocean Technology Systems LIMITED WARRANTY Ocean Technology Systems Magnacom MAG 1003 PS is fully warranted against defects in materials and workm
25. r damage will occur E Key EE g ed 1 VOX adjustment control rere 2 gi volume adjustment di EE T contro 4 is eg 3 3 Squelch adjustment control 4 Receive volume adjustment control 5 Channel selection switch Figure 5 Adjustment Controls 15 63 SQUELCH The squelch control Fig 5 3 allows the squelch level to be varied When the squelch is on the control acts like the squelch control on a CB radio The squelch adjustment control is a two turn type Clockwise turns from the beginning point full counterclockwise rotation will make the unit apply more squelch As illustrated in Figure 7 the more you apply squelch the quieter the unit becomes however the range is reduced The factory preset ON adjustment is set between 1 and 1 3 4 turns clockwise When in the ON setting mode the background noise should be suppressed If you turn the control two turns clockwise you will decrease your receive range dramatically Fig 7 The transducers will have to be within a few feet of each other If the mission requires long range communication the squelch should remain off Squelch is turned off by a full counterclockwise rotation where the squelch control cannot be turned any further CAUTION Do not force the control past the stop point or damage will occur Remember the more squelch you apply the le
26. ription iiui nep recte tereti Fever evo 3 2 2 Package D SIphu u u nu rr tear iere 3 2 3 Transceiver Adjustments eeceisestcieece nete SEER EG rete 3 2 4 Voice Operated Transmitter VOX sss 3 2 5 Push to Talk PTT Switch eee sess retener SEGE eg Se 5 26 Squelch SO ta oisi ore C DTE EE ees 5 2 Side Audio Volume ST 4 Ee EIE ER EER EE dore ees 5 2 8 Receiver Volume RV 5 29 Dual Channel Select otis iris EE ERGE GEKEER GEGEE DEE Een rera Eee does 5 2 10 Headset with Boom Microphone 6 2 11 Compatible Surface Diver Transceivers 6 Section 3 Adjustment amp Operating Instructions 7 EA General ME N NE EE sha anon 7 3 2 Inspection of Equipment sse 7 3 3 Operating Procedures edens iecit iens 7 3 4 jdjustments nine ee e ce er Oa e detegere 8 3 4 1 Push to Talk PTT Button 8 342 Transmit VOX or PTT iue demere entrent 8 3421 VOX Adj stmeni 5 ciet einen 9 BAS Channels u nuan aaa R ukasa 9 3 44 Squelch Adjustment 9 3 4 5 Volume Adjustment iis sees ee ee ee ee Re Ge Re Ge 9 35 jPre Dive Checklist u u RES tU HER Gie 9 3 6 Receiving MESSAPE seed sede be ee edere tet ive pre fe decine 9 S Pi the ai nio ER AE 10
27. sing 12 Pull up on the latches simultaneously 2 Separate the upper and lower modules 7 amp 13 while being careful not to damage the o ring 10 3 Ifyou are replacing a currently installed RB 14 battery remove the old RB 14 from the lower housing 11 4 Install the RB 14 by inserting it into the lower housing of the diver unit with the contacts oriented so they connect to the springs located in the upper electronics housing 9 5 Verify that the o ring 10 is in place lightly lubricated with a high grade silicone grease and free of debris 6 Carefully mate the upper and lower housings together Ensure that they line up evenly and that nothing is on the o ring or mating surface 7 Connect the latches from the lower housing 12 to the upper strikes 8 Pull down the latches simultaneously until fully down Doing so will spring load the upper and lower assemblies 11 8 Look on all sides of the MAG 1003 PS to verify the upper and lower assemblies appear evenly matched with no high spots Note If the housing is not completely sealed water will enter during the dive and may damage the battery and EM type selection switch 4 2 BATTERY CHARGING To recharge the RB 14 battery pack connect the RCS 3U HIU charger Fig 3 1 to the diver unit s EM Hi Use connector Fig 3 2 and the power input cord to the AC power source 90 260 VAC 50 60 Hz Charge the battery for 4 6 hours If you are using the
28. ss range you can expect When possible use the transceiver in the squelch OFF position Graph shows VOX setting at 1 turn clockwise 0 1 2 3 4 5 This setting provides a medium VOX sensitivity This is our factory preset setting 6 7 8 9 10 Graph shows VOX setting at 1 1 2 turns clockwise 0 1 2 3 4 5 6 7 8 VOX will trigger easily and may falsely trigger Graph shows VOX setting at 2 turns clockwise 0 1 2 3 4 5 6 7 8 9 10 We recommend this setting for less sensitive microphones Figure 6 Effect of VOX adjustment on VOX sensitivity 0 represents a fully coun terclockwise rotation and 10 fully clockwise two turns 16 Graph shows squelch setting at 1 turn clockwise 1 4 Use a relatively low setting for increased reception range Graph shows squelch setting at 1 1 2 turns clockwise 0 1 2 3 4 5 6 7 8 Factory setting should work well for most operations Graph shows squelch setting at 2 turns clockwise 0 1 2 3 4 5 6 7 8 9 10 Not recommended may disable communications from divers and or surface Figure 7 Effect of squelch adjustment on squelch sensitivity 0 represents a fully counterclockwise rotation and 10 fully clockwise two turns SECTION 7 BASICS OF SOUND IN WATER 71 BACKGROUND If a diaphragm submerged in water is caused to vibrate by electrical means it has mechanical energy of motion that is communicated to the water Ifanother diaphragm is submerged in the water near t
29. st 2 turn level controls Voice operated transmitter VOX or manual activa tion PTT Channel A 28 5 KHz lower sideband LSB Channel B 32 768 KHz upper sideband USB Assuming 10 transmit time 4 hours on high power channel A or 8 hours on low power channel B RB 14 NiMH battery pack 12 V at 2 amp hours Includes spring contact pad Blinking red LED on upper housing and beep in earphone Piezoelectric Broadband Helmholtz Resonator Dynamic earphones and dynamic 150 ohm micro phone model THB 13 part no 910019 007 0 C to 43 C 432 F to 110 F 25 C to 60 C 14 F to 140 F Hi USE for headset MS style for transducer Injection molded high impact glass filled ABS plastic Height 8 20 in width 3 55 in depth 1 80 in 55 feet RCS 3U HIU 90 260 VAC 50 60 Hz input 41 VDC output RC SW 6 90 260 VAC 50 60 Hz Input 24 VDC output SECTION 2 EQUIPMENT DESCRIPTION 2 1 GENERAL DESCRIPTION The Magnacom MAG 1003 PS is housed in a watertight enclosure designed for easy belt mounting It is designed to operate with the MAG 1003D or MAG 1004HS military diver communication system or any surface or diver transceiver within range and on the same frequency 2 2 PACKAGE DESIGN The MAG 1003 PS housing is constructed of high impact glass reinforced ABS plastic which will not corrode if scratched The housing is divided into two major parts Fig 2 the upper electronics 7 and the
30. uelch VOX channel etc See Section 3 4 Adjustments STEP 3 Connect the Hi Use connector from the MAG 1003 PS to the Hi Use connector of the THB 13 headset with boom microphone STEP 4 Connect the transducer cable s MS connector to the transceiver to activate the unit Fig 2 The red LED will illuminate while power is on STEP 5 Immerse the diver unit in a pail of water if testing between 2 diver units place each in a separate pail of water Separate the pails to a distance of approx 6 feet When immersed verify the red LED is illuminated indicating power is activated To activate the diver unit use a paper clip bent over and in contact w both water activation screws If using the system in the voice operation mode VOX speak loudly with a vowel sound such as AH or say the number FOUR to trigger the VOX Note The MAG 1003 PS when first initiated will always begin in the PTT mode even if you had it in the VOX mode when it powered down WARNING Minimal operation through air is possible but not recommended Conditions may arise where transmitter amplification can occur and cause permanent damage to the unit s 7 STEP 6 Verify your transceiver is on the same channel everyone else will be using audio volume levels are to your liking the VOX setting is proper unless you plan to use only PTT and the squelch setting is appropriate for the environment and or range you require Refer to Secti
31. utton your transceiver will automatically return to the receive mode If you are in the VOX mode you can still depress the PTT to override the VOX Doing so is useful if your VOX is not adjusted properly and you have trouble activating the VOX However if you override the VOX then when you release the PTT button you will still have the VOX delay see Section 3 4 2 1 VOX Adjustment 2 When you depress it three times within two seconds the unit switches from VOX to PTT mode 342 TRANSMIT VOX OR PTT When power is first applied the system defaults to PTT mode By pressing the PTT button three times within two seconds the system toggles between VOX and PTT modes and emits a verification tone A two tone sequence indicates VOX mode and a short one indicates PTT mode 3 4 2 1 VOX Adjustment A two turn level control Fig 8 1 in Section 6 is located inside the electronics housing for adjusting the VOX sensitivity The factory default is a one half to middle setting which is one full clockwise rotation The 8 control is a two turn device that puts its mid setting at one full revolution from fully counterclockwise or clockwise Rotation clockwise increases VOX sensitivity A rotation of one eighth is recommended for fine adjustments of either more or less sensitivity The factory setting is usually sufficient for most voices Remember to speak close to the microphone less than 1 4 inch at higher than normal volume 3 4 3 CHANNELS To c
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