11Try turning the MIC ON button on. It should not stay on.

12Adjust signal generator to –5 dBu at 25.680 kHz.

13Try turning the MIC ON button on and off. It should turn on and off as usual. 14Adjust signal generator to –5 dBu at 24.480 kHz.

15Try turning the MIC ON button on. It should not stay on.

16Remove the signal generator from channel 1.

Mic Kill Transmit Test

1Set all front panel buttons to off.

2Connect a frequency counter an AC meter to the intercom channel 1 output.

3Transmit a mic kill signal on intercom channel 1 (tap the CALL button 3 times, then press and hold the CH 1 TALK key).

4Check that the signal on the channel 1 output is between 23.7 to 23.9 kHz at –9.8 dBu ±2 dBu.

5Release the CH 1 TALK button.

Call Transmit Test

1Set all front panel buttons to off.

2Transmit a call signal on intercom channel 1 (tap the CALL button, and while the call LED is flashing, press and hold the CH 1 TALK key).

3Check that the signal on the channel 1 output is between 19.9 to 20.1 kHz at –9.8 dBu ±2 dBu.

4Release the CH 1 TALK button.

Call Receive Test

1Set all buttons to off.

2Reconnect the signal generator to intercom channel 1.

3Adjust signal generator to –5 dBu, 20 kHz (check frequency with frequency counter).

4Check that the CALL and CH 1 TALK LED’s are flashing.

5Attenuate the signal input by 20 dB, and check that the LED’s are still flashing.

6Attenuate the signal an additional 10 dB. The LED’s should stop flashing.

7Adjust signal generator to –5 dBu, 18.600 kHz.

8Verify that the LED’s do not flash.

9Adjust signal generator to –5 dBu, 21.400 kHz.

10Verify that the LED’s do not flash.

11Adjust signal generator to –5 dBu, 19.600 kHz.

12Verify that the LED’s do flash.

13Adjust signal generator to –5 dBu, 20.400 kHz.

14Verify that the LED’s do flash.

15Remove the signal generator and frequency counter.

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Telex MCE325 manual Mic Kill Transmit Test, Call Transmit Test, Call Receive Test

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.