MAGNACOM ® SW-1000-SC SINGLE SIDEBAND ACOUSTIC TRANSCEIVER (MILITARY) “Technology in Depth”
Undersea Systems International, Inc. dba Ocean Technology Systems - NOTICE - This manual and the information contained herein are provided for use as a maintenance 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.
Table of Contents Section 1: Introduction ................................................................................1 1.1 General..........................................................................................1 1.2 Specifications................................................................................2 Section 2: Equipment Description ..............................................................3 2.1 General Description.................................................................
3.4.3 Channels.........................................................................10 3.4.4 Squelch Adjustment........................................................10 3.4.5 Volume Adjustment........................................................10 3.5 Rebreather Installation................................................................10 3.5.1 System Setup..................................................................10 3.5.2 Transceiver Installation..............................................
SECTION 1 INTRODUCTION Congratulations! You have just purchased the finest, state-of-the-art, patented underwater communication system available. The Magnacom® SW-1000-SC is a 70watt, ultrasonic, single sideband transceiver designed to allow diver-to-diver and/or diver-to-surface (and vice versa) through-water voice communications. It also allows secure hardwired intercom communications between two divers.
1.2 SPECIFICATIONS Nominal Range: 200 m to 3000 m Note: Environmental variability such as that caused by biological noise and interference, thermoclines, etc., can reduce range.
SECTION 2 EQUIPMENT DESCRIPTION 2.1 GENERAL DESCRIPTION The Magnacom® SW-1000-SC is housed in a watertight enclosure designed for easy belt or tank mounting. (For surface operation, our Magnacom® MAG-1001S surface station and SW-100-CD portable surface unit are fully compatible with the SW-1000-SC and offer long-range performance. Note: Be sure to obtain a MAG-1001S or SW-100-CD programmed for the same channels as the SW-1000-SC.) 2.
2.3 TRANSCEIVER ADJUSTMENTS The SW-1000-SC 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 lower half of the upper electronics housing (Fig.
earphones. If this occurs, a lower setting is desired. Refer to Section 3 (Adjustment and Operating Instructions) for more information. 2.8 INTERCOM AUDIO (IV) Your intercom volume is on all the time. You will hear yourself or any other diver that plugs in his coiled cord as “Intercom Audio.” The two-turn level control allows adjustment of secure diver-to-diver intercom audio volume. A clockwise turn will increase the volume. This volume is typically set a little lower than the rest. 2.
2.11.4 HM-1SW (910281-000): The HM-1SW consists of an HM-1 mouth mask, a head strap, a ceramic earphone, an ME-500 dynamic microphone, a Hi-Use® connector, and a chest-mount PTT button. 2.11.5 HM-1SW-SM (910281-001): The HM-1SW-SM consists of an HM-1 mouth mask, a head strap, a ceramic earphone, an all-depth Super Mic®, a Hi-Use® connector, and a chest-mount PTT button. 2.11.6 LAR5-SW ADAPTER (900282-006): The LAR5-SW adapter is placed between the inhalation hose and LAR V bite-mouth DSV assembly.
Table 1: EM Assemblies for the SW-1000-SC Model Number Microphone Earphones Mask Type EMA-SW-1SM (910274-001) Super Mic 2 Divator MK II FFM EMA-MK24-SM (910279-001) Super Mic 2 MK24 FFM EM-KMS-48SM (910280-002) Super Mic 2 M-48 SuperMask® LAR5-SW (900282-006) Dynamic 2 N/A (rebreather) HM-1SW (910281-000) Dynamic 1 HM-1 mouth mask HM-1SW-SM (910281-001) Super Mic 1 HM-1 mouth mask EM-OTS-2 (910369-000) Hot-Mic 2 Guardian FFM EM-OTS-2SM (910379-000) Super Mic 2 Guardian FFM
SECTION 3 ADJUSTMENT AND OPERATING INSTRUCTIONS 3.1 GENERAL This section contains information for operating the Magnacom® SW-1000-SC 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.
STEP 5:Ensuring they are on the same channel and while using the FFM microphone while the unit is still activated, press the PTT button and talk into the microphone. You should hear yourself through the other diver unit or the surface station. 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.
(see Section 3.4.2.1, VOX Adjustment). (2) When you click it three times within two seconds, the unit switches from VOX to PTT mode. 3.4.2 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 tone indicates PTT mode. 3.4.2.
V housing with straps (not supplied). Figure 3 shows the transceiver mounted to the LAR V fiberglass shell. 3.5.3 LAR V ADAPTER: If a LAR V Adapter is used instead of a full-face or mouth mask, install the adapter between the dive surface valve (DSV)/T-bit assembly and the inhalation hose. See the instruction sheet provided with the LAR V Adapter for more information. 3.6 PRE-DIVE CHECKLIST l. Fully charged RB-14 NiMH battery pack installed (Section 4). 2. O-rings in place, clamps secure. 3.
3.7 SLEEP MODE Disconnecting the e/m harness (cable) from the transceiver, with the transceiver remaining under water, results in the transceiver entering “Sleep Mode.” During this mode of operation, battery consumption is dramatically reduced—allowing the swimmer to exit the water or perform other operations not requiring throughwater communications. The transceiver “wakes up” upon re-connection of the e/m cable and returns to normal operation.
case between dives and take special care to avoid damaging the transducer. 3.10 EXAMPLES OF UNDERWATER COMMUNICATION 3.10.1 CALLS BETWEEN SURFACE, SUBS, OR DIVERS: 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.
SECTION 4 BATTERIES AND CHARGING With the SW-1000-SC are provided one RB-14 nickel-metal hydride (NiMH) rechargeable battery pack and an RCS-3U-HIU smart charger (Fig. 4). OTS offers an optional charger, the RC-SW-6 (Fig. 5), that charges 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.
4.2 BATTERY CHARGING To recharge the RB-14 battery pack using the RCS-3U-HIU smart charger (provided with the SW-1000-SC), connect the charger (Fig. 4, #1) to the diver unit’s EM HiUse® connector (Fig. 4, #2) and the power input cord (Fig. 4, #4) to the AC power source (90–264 VAC, 50–60 Hz). Refer to the instruction sheet provided with the RCS-3U-HIU charger for complete charging instructions. If using the RC-SW-6 multi-battery smart charger, connect it (Fig.
SECTION 5 MAINTENANCE AND HELPFUL HINTS 5.1 GENERAL The SW-1000-SC is virtually maintenance-free and should give you many years of service. The following should be done after each day of diving: 1. Freshwater-rinse the unit to remove debris. A mild soap solution can be used, but after cleansing, rinse with freshwater. 2. Dry the transceiver with a clean towel, especially around the area of the power activation screws. Doing so will ensure the unit will shut off.
4. Make sure the microphone element is less than 1/4” from the diver’s lips (unless using the LAR V Adapter or other rebreather adapter). 5. Ensure all batteries are charged before starting the dive operation. 6. Before the divers enter the water, check to make sure they have not covered the transducer with any type of dive gear. 7. Make sure all wires are dressed to avoid snags while diving. 8. Designate one diver as the lead communication diver so both divers will not be trying to answer questions. 9.
SECTION 6 ADVANCED USER INFORMATION 6.1 GENERAL: Although the SW-1000-SC is designed so that minimal manual adjustments are necessary, custom user 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.
the electronics compartment and can be observed after removing the lower battery compartment. The VOX control (Fig. 6, #1) will rotate two times and then stop. Rotation in the clockwise direction increases the sensitivity. If a VOX high setting is too sensitive causing false triggering, rotate counterclockwise until a good setting is found (see Figures 7–9 for a graphic look at the effect of rotating the adjustment control). Divers should use a low VOX setting when using an ME-16R Hot-Mic®.
adjustment is set between 1 and 1-3/4 turns clockwise (Fig. 12). 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. 12). The divers will have to stay 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).
SECTION 7 BASICS OF SOUND IN WATER 7.1 BACKGROUND If a diaphragm submerged in water is caused to vibrate by electrical means, it has mechanical energy of motion communicated to the water. If another diaphragm is submerged in the water near the vibrating diaphragm, the acoustic energy in the water will excite mechanical vibrations in the second diaphragm. These vibrations may be detected electrically to complete a flow of mechanical energy from the first diaphragm to the second.
Figure 13: 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. The velocity of sound transmission changes only about one percent for a temperature change of l0°F. However, the resultant bending of the sound path has great effect over a distance of several hundred yards.
the water seems still. A short distance away, the current is flowing again (Fig. 14). Similarly, acoustic energy in the water can be blocked if the transmitting source is Figure 14 close to a large object. Behind the blocking object is a “zone of silence” 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. 15).
LIMITED WARRANTY Ocean Technology Systems’ Magnacom® SW-1000-SC is fully warranted against defects in materials and workmanship 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.
