Configuring a Two-Wire Interface Module

The following procedure shows you how to configure the Module Settings for a Two-wire interface module.

Note: The Two-wire interface module must receive power from the Partyline.

To configure the Module Settings for a Two-wire interface module:

  1. In Menu mode, select Module Settings.

  1. From the second menu, select one of the two available ports on the two-wire interface module:

Slot 1/Port A 2W

Slot 1/Port B 2W

Note: In this example, the two-wire module has been fitted to slot 1 in the expansion bay. The expansion bay contains three slots.

2W = Two-wire.

  1. To associate any available Channel (or to disable Channels associations) with the selected port:
    From the third menu (third display screen), select Channel Assign.

  2. From the fourth menu, select one of the following:

    • Disabled (default)
    • Channel 1
    • Channel 2
    • Channel 3
    • Channel 4
    • ...

  3. To confirm the selected setting, press the rotary control.

  1. The Program Output allows a program feed associated with the Channel assigned to the four wire port to either be delivered to that 4 wire port alongside the other Channel audio or not. To set the Program Output:

    1. From the third menu, select Program Output.

    2. From the fourth menu, select one of the following:

      • Unmute

      • Mute (default)

  1. To confirm the selected setting, press the rotary control.

  2. Auto-nulling helps to reduce echo while talking on a two-wire audio system. To start Auto-nulling on the selected port:

    1. From the third menu, select Auto-Nulling.

    2. From the fourth menu, select Start.

Note: Auto-nulling is only applicable to two-wire audio. All Talk routes/keys must be disabled before Auto-nulling can commence. If an echo persists, ensure all Talk routes are disabled and re-null the system.

  1. The Two-wire interface module is set for Clear-Com systems by default. However, you can also set the two-wire ports for use with RTS analog Partyline systems. If you are connecting to an RTS system, you also have a choice of two different pinouts:

RTS pinout option

Description

RTS Audio Pin 2

Pin 2 is used for both power and audio.

RTS Audio Pin 3

Pin 3 is used for audio (Pin 2 is used for power only).

Note: For detailed pinout information, see HMS-4X Main Station rear panel: Interface modules..

To configure the port for either Clear-Com or RTS systems:

  1. From the third menu, select Mode.

  2. From the fourth menu, select one of the following:

  • Clear-Com

  • RTS Audio Pin 2

  • RTS Audio Pin 3

  1. To confirm the selected setting, press the rotary control.

  1. To set the Input Gain:

  1. From the third menu, select Input Gain.
  2. From the fourth menu, select one of the following:

  • +3 dB

  • +2 dB

  • +1 dB

  •   0 dB (default)

  • -1 dB

  • -2 dB

  • -3 dB

  1. To set the Output Gain:

    1. From the third menu, select Output Gain.

    2. From the fourth menu, select one of the following:

    • +3 dB

    • +2 dB

    • +1 dB

    •   0 dB (default)

    • -1 dB

    • -2 dB

    • -3 dB

  1. To set the action trigger for the Program Output:

    1. From the third menu, select GPO.

    2. From the fourth menu, select one of the following:

    • Enabled

    • Disabled

  1. Enabling RMK [Remote Mic Kill] Input allows an external 2-wire analogue partyline device such as the main (base) station (MS-702) to send an RMK signal to the digital HelixNet devices attached to the same HelixNet channel.

Note: If this is enabled and the analog Partyline system is powered down, it will be interpreted by the HelixNet Main Station as an RMK input and all talk routes will be switched off.

To enable RMK Input:

  1. From the third menu (third display screen), select RMK Input.

  2. From the fourth menu (fourth display screen), select one of the following:

  • Enabled

  • Disabled (default)

  1. To confirm the selected setting, press the rotary control.

  1. Enabling RMK [Remote Mic Kill] Output allows you to send an RMK signal from the HelixNet Main Station to any connected analog 2-wire partyline system.

To enable RMK Output:

  1. From the third menu, select RMK Output.

  2. From the fourth menu, select one of the following:

  • Enabled

  • Disabled (default)

To confirm the selected setting, press the rotary control.

  1. If you are setting up a continuous audio (program) feed using the two-wire interface module, then you may want to enable the VOX functionality. To help reduce redundant noise, the VOX functionality automatically deactivates and activates the continuous audio feed, at an automatically determined volume threshold.

Note: If you assign a program and a two-wire interface to the same Channel, VOX is automatically enabled.

To enable or disable VOX:

  1. From the third menu, select VOX.

  2. From the fourth menu, select one of the following:

  • Enabled

  • Disabled (default)

  1. To confirm the selected setting, press the rotary control.

  1. The VOX Delay OFF setting determines the length of time to wait before deactivating the incoming audio. To set the VOX Delay OFF setting:

    1. From the third menu, select VOX Delay OFF.

    2. From the fourth menu, select one of the following:

    • .5 sec (default)

    • 1 sec

    • 2 sec

    • 3 sec

    • 4 sec

    1. To confirm the selected setting, press the rotary control.