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2 Diver Wireless Tender Communicator - User Manual - Submarine ...

2 Diver Wireless Tender Communicator - User Manual - Submarine ...

INSTALLATION &

INSTALLATION & OPERATIONSIMULCOM - WHAT WHY and HOW (continued) 6.12TO OPERATE AND/OR CHECK-OUT SIMULCOM1. Attach hat to umbilical.2. Attach comm-cable to AMCOM II, red banana plug to Diver 1 microphone, black bananaplug to Diver 1 earphone.3. Don hat and talk to yourself; if you hear your voice over the earphones the system isworking.To revert back to 2-wire, remove black banana plug from earphone jacks (AMCOM II) and pluginto top of microphone banana plug (red).TO RECAP - We now have a system where diver 1’s microphone is connected to the Diver 1microphone input of the AMCOM II and Diver 1’s earphone is connected to the earphone for Diver1. All features such as diver push to talk switch and independent volume controls of the AMCOM IIremain intact. Tender uses a headset, which is plugged into the tender microphone and headsetjacks.With the AMCOM II system you can mix 2-wire/simulcom systems, for example, Diver 1 and 2could be Simulcom while Tender can be 2-wire (no headset - use speaker for tender). Or, onediver can be 2-wire and one can be Simulcom. Just remember if any one person is on two-wireyou must use the push to talk (PTT) for that diver to hear or for the tender to talk.Note: the PTT switch overrides diver conversations, (see operating guide for details).Other configurations, which can be implemented with Simulcom systems:1. Remote station for equipment operator, or second tender on 2-wire or Simulcom.2. Several remote stations with any combination of 2-wire or Simulcom.30

THEORY OF OPERATIONTHEORY OF OPERATION 7.1Refer to the functional block diagram and schematics while reading this section. This Sectiondescribes the function of the electronic circuits.AMPLIFIER CARD 2832-202 7.2INPUT AMPLIFIER CIRCUIT - U1, U2, and U3, are differential input amplifiers, which acceptdynamic microphone and Pre-Amplifier Microphone, level signals (0.1 to 50mv.) and amplify them.Signals common to both inputs are rejected. C common mode rejection (CMR) is 40db.MIXER – U6-A mixes all divers microphone inputs. U6-B mixes tender, divers and FDW signals.BUFFER – U6-C is a unity gain, it is used to buffer the FDW input signal.TAPE RECORDER – U6-D is amplifier circuit to drive the taper recorder transformer.FILTER – U7 is band pass filter. U7-A is first filter for tender output and U7-B is second for diveroutput.AUDIO POWER AMPLIFIERS – U9 and U10 are audio power amplifier integrated circuitsconnected in a bridge configuration. The output "floats" at approximately 6 volts and should neverbe connected to ground. The amplified audio output signal is directed to Diver or Tender throughrelays K1, K2 K3, and K4.PRE-AMP MIC DETECTION – U5 is voltage comparator IC, the circuit detect the microphoneresistance, then attenuate the diver signal through Q7, Q8, and Q9MUTE CIRCUIT – U8 is used for mute circuit which reduces the clicking noise when depressingPTT switch.BATTERY VOLTAGE SENSES CIRCUIT – U11 is used to electronically sense the batteryvoltage. Controls the panel LED (battery condition indicator) that indicates operational status:Good battery voltage - steady green lightLow battery - blinking green lightBelow reliable operational range – steady red lightRELAYS CIRCUIT – The five relays K1,K2,K3,K4, and K5 are activated through PTT switches.K1 relay cut the Panel Speaker and Panel Microphone, when Tender PTT Jack is activated byHand Held PTT Microphone Jack.K2 relay switch Tender Earphone Jacks from Output to Input, when activating PTT All DiversSwitch or Hand Held PTT Microphone Jack.K3 relay switch Diver 1 Microphone Jacks from Input to Output, when activating PTT All DiversSwitch or Diver 1 PTT switch.K4 relay switch Diver 2 Microphone Jacks from Input to Output, when activating PTT All DiversSwitch or Diver 2 PTT switch.31

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