Telex MCE325 manual Rear Panel Features, Intercom Lines

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Figure 1.1 MCE325 front and rear panel features.

Rear Panel Features

Intercom Lines

Connectors J8 and J9 are parallel-wired for loop-through connection to additional stations. These connectors are used either for two-wire channels 1 and 2 input/output, or four-wire channel A output. (The four-wire channel A input is connected at the auxiliary connector.)

Connector J10 is used for two-wire channel 3 and 4 input/output, or four-wire channel B output, but no loop-through connector is provided for these channels. (The four-wire channel B input is connected at the auxiliary connector.)

The MCE325 presents a bridging impedance of 10,000 ohms to the intercom line, and is designed for use with intercom lines having a 200-ohm line terminating impedance. A 200 ohm termination plug is supplied (connected to J10) to prevent channels three and four from oscillating when the MCE325 is in two-channel mode.

External Program Input

Two ¼-inch phone jacks are provided for external program input. The station accepts line-level, balanced input. The two program inputs are mixed internally, and may be assigned (through internal programming) to right headphone, left headphone, external speaker, or any combination of these. In addition, program A may be assigned (through internal programming) to two-wire channel 3 or four-wire channel A; program B may be assigned to two-wire channel 4, but cannot

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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 General FeaturesDescription Connections, Inputs and Outputs Front Panel FeaturesIntercom Lines Rear Panel FeaturesProgramming PowerMounting Configuration Headphone Amplifier MCE325 SpecificationsPower and Mechanical Microphone PreamplifierConnectors MCS325 SpecificationsStandard 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 Internal Programming and Adjustments InstallationSwitch Number Switch Function Default Setting Jumper Number Jumper Function Default Setting Internal DIP switches, jumpers and level trimmers Remote Talk-off DS7 Front Panel Setup Mode Lock-out DS4Program Assignment IFB Option J4, J5, J16-J18 Mechanical InstallationHeadphone Sidetone Trimmer Adjustment R37 Speaker Dim Adjustment R157Mounting configurations Intercom Lines J8, J9, and J10 Electrical InstallationAC Power and Fuse External Speaker, J27 Auxiliary Connector, J22Four-Wire Channel a and B Input Program Inputs, J14 and J15External Headset Remote Microphone SwitchKey outputs Expanded IFB Option ISO ConnectionFront Panel Headset Connections Carbon-microphone headset connector Momentary/Latching Button action LED IndicatorsGeneral Operating InstructionsMicrophone On/Off Volume AdjustmentFront Panel Sidetone Nulling Trimmer Adjustment Panel Mic/Headset Mic SelectionFront Panel Programming Four-channel Listen Call DisableLatch Disable Channel IDInstant Mic Reset6C S I 2 0 0 U s e r I n s t r u c t i o n s Factory Support Information Preventive MaintenanceCorrective Maintenance AccessTest Equipment Test and Adjustment ProceduresCleaning Power Supply TestKeying Output Test Initial ConfigurationFrequency Response and Level Check, Mic to Line Four-Channel, Two-Wire ModeTwo-Channel, Four-Wire Mode Sidetone Null Test and AdjustmentTalk Button Test Point Potentiometer True Sidetone AdjustProgram a to Left Headphone Program to Speaker IFB TestProgram B to Right Headphone Four-Wire B input to Right Headphone Four-Wire a Input to Left HeadphoneMic Kill Receive Test Panel Mic to Channel TestCarbon Mic to Channel Test VOX TestCall Receive Test Mic Kill Transmit TestCall Transmit Test Noise Checks Remote Mic Switch TestISO Test Program Lockout TestPage 14C S I 2 0 0 U s e r I n s t r u c t i o n s Final Assembly, MCE325 Packaging AssemblyFront Panel Assembly Main PC Board Assembly Back Panel AssemblyHeatsink 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 DS1-DS8 PC Board Assembly, Front Panel14C 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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