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The SP-100D is designed to be portable and easy to operate. It is an ultrasonic,
through-water communication system. It will enable you to talk to all other divers
and/or surface stations on the same frequency and within range. When you speak
using the SP-100D, your voice is sent out in an omnidirectional pattern via the
transducer to all other transceivers. The transducer is the antenna that both sends
out the signal and picks up incoming signals.
4.1
SETUP
After you have installed the batteries (Section 3.2), you are ready to set up your
SP-100D surface station.
1. Place the SP-100D on a surface that is secure from boat action and where the
transducer cable will not trip anyone or be damaged.
2. Open the case cover, and ensure that the o-ring is in place in the transducer
cable receptacle (Fig. 1, #6) on the front panel. Connect the TCA-35 trans-
ducer cable to the receptacle. Connecting the transducer cable powers up the
SP-100D. (When not using the SP-100D, disconnect the transducer cable to
conserve battery power.)
3. Lower the TCA-35 transducer into the water. If using a boat, lower the trans-
ducer so it clears the hull. If the surface station is set up on a beach, suspend
the transducer from a float.
Under no circumstances should the transducer lie on the bottom. Laying the
transducer on the bottom would reduce transmission and reception signal
strength, resulting in weak or no communications.
In swiftly flowing water, you may have to keep the transducer from angling
toward the surface. Tie a rope to the cable at the transducer end, and secure
the other end of the rope to a stable structure on the vessel (or wherever the
surface station is located). Hang a weight (about 1/2 pound should be suffi-
cient) from the transducer end of the rope, but make sure that the weight
hangs below the transducer to prevent transducer damage.
4. Adjust the volume (Fig. 1, #1) to a comfortable listening level.
5. If desired, turn on the squelch (Fig. 1, #8) to suppress background noise.
6. Connect the HHM-3 hand-held microphone (supplied with the SP-100D) or
the THB-14 headset (sold separately) to the microphone receptacle (Fig. 1,
#5).
SECTION 4
OPERATION
7
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