Telex EMS-4001 manual Avertissment, Configuration Pre-check, Balanced/Unbalanced Switch

WARNING

The following instructions are for use by qualified personnel only. To avoid electric shock, do not remove the cover unless you are qualified to do so.

AVERTISSMENT

Les instructions qui suivent s’adressent uniquement a un technicien qualifie. Pour evite des chocs electriques, ne pas ouvrir le boitier, a moins d’y habilite.

Configuration Pre-check

Before making connections, read the configuration notes that follow, and make sure that all switches and jumpers are properly set for your intended usage. Locations of configuration switches and jumpers are shown in Figure 2. Only the DIP switches and jumpers require internal access. If access is required, remove three screws from the top cover and three screws along the bottom edge from each side.

DIP Switches

DIP switches and their default settings are listed in Table 1. The following paragraphs provide additional details.

Program Interrupt DIP Switches

Each intercom channel has a dedicated program input. These can be used to feed background music, mix-minus audio (for broadcasting usage) etc. to the intercom channels. If external program sources will be connected to the EMS-4001, you have a choice of whether or not you want the program audio to interrupt (shut off) on the intercom channel while the MS-2001/EMS-4001 station operator is talking.

Audiocom Call Send and Receive DIP Switches

By default, all channels of the EMS-4001 can send and receive Audiocom call signals. You can disable call send or call receive capability for selected channels if desired.

Balanced/Unbalanced Switch

The switch is located on the back panel. The switch must be set to the balanced (BAL) position for use with an Audiocom Intercom System. Set the switch to the unbalanced (UNBAL) position when using the unit with a Clear- Com Intercom System.

Direct Program Listen Enable/Disable Jumpers

By default, each program input can be heard by intercom stations on the corresponding intercom channel. (This can be turned on or off for each program input via the MS-2001 front panel programming. See “Turning the Program Inputs ON and OFF” in the Operations section of the MS-2001 User Instructions.) Additionally, all program signals can be heard directly in the MS-2001 speaker or headset, and each program is output at the corresponding speaker jack on the back of the EMS-4001. To disable direct program listening for a program input, reset the appropriate jumper as shown in Table 2. Locations of the jumpers are shown in Figure 2.

Sidetone Trimmers

These trimmers are normally adjusted after all components are connected, and they can be accessed through the bottom cover as depicted in Figure 3. Refer to the MS-2001 User Instructions for the sidetone adjustment procedure.

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