RF POWER SELECTION: While the RF Power indicator is flashing, press the UP ARROW for HIGH and DOWN for NORM (the RF Power line will not be displayed). NORM power should be used for small to medium sized venues and when- ever multiple systems are being used. Press SET when the power is set and the Unbalanced Input level will flash.

UNBALANCED INPUT LEVEL ADJUSTMENT: If the unbalanced audio input will not be used, with the Unbalanced Input Level flash- ing use the UP button to set the level to OFF and press set to go to Balance Input Selection.

Enhanced Dynamic Range (E.D.R.) Operation

The Telex ST-300 Transmitter is equipped with E.D.R., Enhanced Dynamic Range (companded) au- dio. This mode greatly improves the Audio Signal to Noise Ratio when used with the Telex Model SR-400 receiver. The E.D.R. mode must be selected on both the transmitter and receiver to be effective.

1.To engage the E.D.R. function, turn the ST-300 off with the power switch.

2.Press and hold the SET button while you turn the ST-300 back on. The E.D.R. symbol will be dis- played in the lower right corner to indicate the mode is active.

If the Unbalanced input will be used, connect the in- put now and apply audio content. With the audio content playing and Unbalanced Input level flash- ing, watch the audio meter. The peak signal should not go above the 0 dB segment, use the UP and DOWN buttons to adjust the input level so that the loudest input lights up the 0 dB segment. When the level is set, press the SET button and one of the Balanced Input Options will flash (default is 70V).

BALANCED INPUT SELECTION: If the bal- anced audio input will not be used, with one of the Balance Input Options flashing press SET so the Balanced Input Level is flashing. Use the UP and DOWN buttons to set the level to OFF and press SET to end the setup session.

If the Balanced input will be used, with one of the options flashing use the UP and DOWN buttons to select the correct input. With the correct input dis- played, press SET and the Balanced Input Level in- dicator will flash.

CAUTION: Permanent damage can result if 70V line is used with the Input Selection improperly set.

BALANCED INPUT LEVEL ADJUSTMENT: Make sure the Balanced Input Selection is set cor- rectly, then connect the input and apply audio con- tent. With the audio content playing and Balanced Input level flashing, watch the audio meter. The peak signal should not go above the 0 dB segment, use the UP and DOWN buttons to adjust the input level so that the loudest input lights up the 0 dB segment. When the level is set, press the SET button and the Setup Session will end.

3. Repeat the procedure to disable the E.D.R function.

Change Lock Out

The ST-300 SET button can be locked to prevent E.D.R. activation, and unintended channel changes.

1.To engage the Lock Out Feature, press the UP and DOWN buttons at the same time and hold them down for 10 seconds.

2.The padlock symbol will appear and the set but- ton is disabled.

3.To unlock the system, press the Up and DOWN buttons and hold them for 10 seconds or until the padlock symbol disappears.

AUDIO MONITOR: Turn the Monitor (volume) control all the way down (counterclockwise). After the audio input levels have been adjusted, Stereo headphones with a ¼ in. plug can be plugged into the Monitor jack. If you wish to monitor the audio program material, turn up the monitor (volume) con- trol to the desired level. The monitor control does not affect the transmitted audio level.

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Telex ST300, SR-400, SR-50 operating instructions Change Lock Out
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ST300, SR-50, SR-400 specifications

Telex has established itself as a leader in professional communication equipment, known for its reliability and advanced technology. Notably, the Telex SR-400, SR-50, and ST300 are celebrated products, each tailored to meet distinct communication needs in various environments, whether for broadcasting, events, or industrial applications.

The Telex SR-400 is a state-of-the-art belt pack intercom designed for clear, robust communication. It features a 4-channel configuration, allowing seamless connectivity with multiple users, making it perfect for live productions and large events. The device is lightweight and ergonomically designed for comfort during prolonged use. One standout feature of the SR-400 is its high-performance audio processing technology, providing crystal-clear voice quality, even in noisy environments. It also comes equipped with an integrated LED indicator for quickly checking battery levels, ensuring that communications remain uninterrupted.

Meanwhile, the Telex SR-50 serves as an essential companion in various communication settings, providing a reliable intercom solution. This model is known for its compact design and ease of use, featuring a straightforward interface that allows users to connect effortlessly. The SR-50 supports multiple channels, offering flexibility in communication by allowing simultaneous conversations. Its durability and high-quality construction make it suitable for rugged settings, from stage environments to industrial applications. The SR-50 also boasts advanced noise cancellation technology, which effectively filters out background noise, ensuring clarity in every message transmitted.

The Telex ST300 is an ingenious solution that combines transmission and reception capabilities in a single unit. This sophisticated device is particularly advantageous in professional broadcasting scenarios and event management, where instant communication is vital. The ST300 supports both wireless and wired connections, making it versatile for various setups. Its advanced encryption technology ensures secure communication, a critical requirement in sensitive environments. The ST300 is user-friendly, with intuitive controls that simplify operation, which is especially beneficial during high-pressure situations.

In summary, the Telex SR-400, SR-50, and ST300 represent the pinnacle of communication technology in their respective classes. Each model is equipped with features that enhance usability, reliability, and audio quality, making them indispensable tools for professionals who demand excellence in communication. Whether for event production, broadcasting, or industrial use, these devices stand out for their innovative technologies and robust performance, solidifying Telex's reputation in the industry.
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