Telex EMS-4001 Intercom System User Manual


 
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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.