Telex MCE325 manual Programming, Power, Mounting Configuration

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be assigned to a four-wire channel. The program assigned to channels is interrupted during talk output.

Speaker Output

A ¼-inch phone jack is provided for connection of an external speaker (8-ohms minimum impedance). The speaker output is compatible with the MCS325 speaker.

Auxiliary Connector

Standard Options on the 25-pin, female, D-Sub connector are:

1Unswitched microphone output

2ISO connection to a VCP6A/VCP12A/VCP12B

3Microphone on/off switch

4Remote headset

5Remote panel microphone

6Separate inputs for +10 to +15 volts DC, and +17 to +24 volts DC

7Common/ground circuit

8Four-wire channel A and B inputs

9Remote speaker mute

10Key outputs

Programming

Three methods of programming are used:

1Front panel programming via the channel selector and operation buttons.

2Internal programming via circuit board DIP switches.

3Internal programming via circuit board jumpers.

The most commonly programmed options are assigned to the front panel for convenience. Detailed information on internal programming is provided in Section 2, Installation. Detailed information on front panel programming is provided in Section 3, Operation.

Power

The MCE325 is designed for local powering, and is supplied ready for use with either 115 or 230 VAC (but not both). The unit may also be powered from an external DC source connected at the Auxiliary (J22) connector on the rear panel. For information on changing the AC supply voltage configuration, or using DC power, see Section 2.

Mounting Configuration

Mounting configurations are illustrated in Figure 2.3 and include rack mount speaker station, console mount headset station, rack mount headset station, desk top headset station, and portable speaker station. Some mounting configurations may require a remotely located microphone or headset. These may be connected to the Auxiliary connector (J22) on the back of the unit.

1-4M C E 3 2 5 U s e r I n s t r u c t i o n s

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Contents Model MCE325 Proprietary Notice Return Shipping Instructions End-User License Agreement for Telex Software Table of Contents Operation Diagrams Page Features DescriptionGeneral Front Panel Features Connections, Inputs and OutputsRear Panel Features Intercom LinesPower Mounting ConfigurationProgramming MCE325 Specifications Power and MechanicalMicrophone Preamplifier Headphone AmplifierMCS325 Specifications ConnectorsStandard four-channel, two-wire configuration Standard two-channel, four wire configuration Page 10M C E 3 2 5 U s e r I n s t r u c t i o n s 11 MCE325 button configurations 12M C E 3 2 5 U s e r I n s t r u c t i o n s Installation Internal Programming and AdjustmentsSwitch Number Switch Function Default Setting Jumper Number Jumper Function Default Setting Internal DIP switches, jumpers and level trimmers Front Panel Setup Mode Lock-out DS4 Remote Talk-off DS7Mechanical Installation Headphone Sidetone Trimmer Adjustment R37Speaker Dim Adjustment R157 Program Assignment IFB Option J4, J5, J16-J18Mounting configurations Electrical Installation AC Power and FuseIntercom Lines J8, J9, and J10 Auxiliary Connector, J22 Four-Wire Channel a and B InputProgram Inputs, J14 and J15 External Speaker, J27Remote Microphone Switch Key outputs Expanded IFB OptionISO Connection External HeadsetFront Panel Headset Connections Carbon-microphone headset connector LED Indicators GeneralOperating Instructions Momentary/Latching Button actionVolume Adjustment Front Panel Sidetone Nulling Trimmer AdjustmentPanel Mic/Headset Mic Selection Microphone On/OffFront Panel Programming Call Disable Latch DisableChannel ID Four-channel ListenReset Instant Mic6C S I 2 0 0 U s e r I n s t r u c t i o n s Preventive Maintenance Corrective MaintenanceAccess Factory Support InformationTest and Adjustment Procedures CleaningPower Supply Test Test EquipmentInitial Configuration Keying Output TestFour-Channel, Two-Wire Mode Frequency Response and Level Check, Mic to LineSidetone Null Test and Adjustment Two-Channel, Four-Wire ModeTrue Sidetone Adjust Talk Button Test Point PotentiometerProgram a to Left Headphone IFB Test Program B to Right HeadphoneProgram to Speaker Four-Wire a Input to Left Headphone Four-Wire B input to Right HeadphonePanel Mic to Channel Test Carbon Mic to Channel TestVOX Test Mic Kill Receive TestMic Kill Transmit Test Call Transmit TestCall Receive Test Remote Mic Switch Test ISO TestProgram Lockout Test Noise ChecksPage 14C S I 2 0 0 U s e r I n s t r u c t i o n s Packaging Assembly Final Assembly, MCE325Front Panel Assembly Back Panel Assembly Heatsink AssemblyMain PC Board Assembly 4C S I 2 0 0 U s e r I n s t r u c t i o n s Reference 9027-6245-01 Drawing, Section CR1 FB1 #73 Shield Bead 8C S I 2 0 0 U s e r I n s t r u c t i o n s Reference 9027-6245-01 Drawing, Section 10C S I 2 0 0 U s e r I n s t r u c t i o n s RP2 Washer Flat PC Board Assembly, Front Panel DS1-DS814C S I 2 0 0 U s e r I n s t r u c t i o n s Diagrams 2C S I 2 0 0 U s e r I n s t r u c t i o n s Date 7/23/01 Title D\TEMP\AS624501D.cal Title D\TEMP\AS626101C.cal Title D\TEMP\AS626201C.cal Date 7/19/01 Title D\TEMP\AS646401G.dwg Title D\TEMP\BD646401A.cal Title D\TEMP\IS671801A.cal Title D\TEMP\OD635501A.cal Title D\TEMP\OD635502A.cal Title D\TEMP\OD635503A.cal Title D\TEMP\OD635504A.cal Title c\home\cms\benedil\view\9000-646401.CAL Telex Mother Board Mother Board MCE325 Title D\TEMP\SD624601A.cal

MCE325 specifications

The Telex MCE325 is a sophisticated communications headset designed primarily for professionals who demand clarity and reliability in their audio equipment. Renowned for its advanced features and high-quality construction, the MCE325 is a popular choice in various fields, including aviation, broadcast, and live event production.

One of the standout features of the Telex MCE325 is its superior noise-cancellation technology. This headset is engineered to effectively reduce ambient noise, allowing users to focus on important audio signals without distractions. The exceptional passive noise isolation works in tandem with the active noise-cancelling capabilities to ensure that you can communicate clearly, even in loud environments.

The MCE325 also incorporates a high-performance microphone that delivers crystal-clear sound transmission. The flexible boom design allows users to position the microphone for optimal voice pickup, making it suitable for both left- and right-handed users. The microphone’s windscreen further minimizes wind noise, providing an extra layer of clarity during outdoor use.

Comfort is a critical aspect of the MCE325. The headset features plush, padded ear cups that provide excellent comfort for extended use. The adjustable headband ensures a secure fit, catering to a wide range of head sizes and shapes. This ergonomic design minimizes fatigue, allowing users to maintain focus during long hours of operation.

Connectivity is another area where the Telex MCE325 excels. It is versatile enough to work with various devices, thanks to its dual 1/4” and XLR connectors. This flexibility makes it compatible with many audio interfaces and communication systems used in professional settings. The headset also includes a detachable cable, allowing for easy replacement if needed.

The construction of the Telex MCE325 reflects a commitment to durability and longevity. Built with high-quality materials, the headset can withstand the rigors of demanding professional environments. This robustness ensures that users can trust the MCE325 in the most challenging situations, whether it’s in a busy studio or a bustling airport.

In summary, the Telex MCE325 is a versatile and reliable headset designed to meet the needs of professionals across various industries. With its cutting-edge noise-cancellation technology, high-quality microphone, comfort-focused design, versatile connectivity options, and durable construction, it stands out as an ideal choice for anyone seeking superior audio performance and reliability. Whether in communications, aviation, or live broadcasting, the MCE325 delivers an exceptional audio experience.
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