DIVEX Logo HeliCom Dive Control Unscrambler

HeliCom Dive Control Unscrambler

INTRODUCTION

The DC HSU is designed for helium speech communications with three divers and the bell environment.

Operating Modes

Three operating modes offer greater flexibility to meet all bell diving communication requirements:

Supervisor Round Robin Mode allows duplex hands-free communication between the dive supervisor wearing a headset/boom microphone and all divers. A separate volume control for each diver circuit allows different volume settings for each diver to suit individual hearing and speech characteristics and to compensate for microphone performance.

Diver Round Robin Mode provides duplex hands-free communication between all divers. Interjection by the dive supervisor to all divers is by means of the PTT All Divers switch, or to individual divers by means of the respective Diver PTT switch. A separate volume control for each diver circuit allows different volume settings for each diver to suit individual hearing and speech characteristics and to compensate for microphone performance.

Simplex Mode provides simplex diver communication with uplink signal priority. The dive supervisor uses a PTT switch for each diver individually or a master PTT switch for all three divers simultaneously. Separate volume controls are provided for uplink and downlink signals to suit individual hearing and speech characteristics and to compensate for microphone performance.

A front panel loudspeaker allows the divers’ speech to be audible to the dive supervisor independently of his headset in all modes of operation. An on/off switch allows the loudspeaker to be switched off as required.

DSP Helium Speech Unscrambler Circuit Uplink signals from the divers are mixed in an audio mixer before decoding to the selected gas and environmental settings by a digital signal processing (DSP) circuit.

An LCD display is provided for monitoring helium speech decoding settings. Adjusting settings is easily accomplished by means of a front panel depth setting potentiometer calibrated 0 msw to 400 msw in 50 msw increments and a user-friendly keypad for PPO2, pitch reduction and temperature settings.

An unscrambler on/off switch allows the DSP helium speech unscrambler circuit to be bypassed when communications are in the air range or when unscrambling is not required.

 

Next Steps

Choose an option below to find out more about HeliCom Dive Control Unscrambler


  • Make Enquiry
    Detailed enquiry?
    Click here to submit your query and
    we'll respond within 48 hours.

  • Live Chat
    Have a quick question?
    Click here to start a live chat with
    one of the team.

  • Call us
    Prefer to speak direct?
    Click here for the contact details
    of your nearest office.

jfd-footerdivex-footer

In 2015 James Fisher Defence and Divex merged to form JFD.

Today, JFD serves customers in 81 countries across six continents.

Discover More