AxelTech Oxygen 3 broadcast mixing console user guide

Product Overview

AxelTech Oxygen 3 is an analog broadcast mixing console built for on-air and production use in small to mid-size radio studios, including local, community, and web stations. This guide is based strictly on the official AxelTech documentation for the Oxygen 3. If you are replacing an older broadcast mixer or setting up a compact studio desk, Oxygen 3 focuses on fast operation, phone handling, and dependable daily control.

Oxygen 3 combines 8 channels with A/B input selection, 3 microphone inputs, 9 stereo unbalanced line inputs, and 2 built-in POTS telephone hybrids for live calls and conferencing. Studio-specific features include an On Air lamp control, monitor CUT-OFF behavior for loudspeakers, a Talk-Over function for voice-over-music mixing, and EQ controls on inputs for shaping tone during shows.

Best suited for:

• Radio studios that need a compact, analog broadcast mixer with integrated phone hybrids for callers and conferencing.
• On-air setups where mic control should manage monitor CUT-OFF and On Air lamp behavior from the desk.
• Teams that want straightforward fader-based mixing with per-channel Gain, EQ, and PFL/PGM controls.

Consider alternatives if:

• You require more than 2 built-in telephone hybrids for simultaneous phone lines beyond the documented capacity.
• Your workflow depends on balanced line inputs everywhere, since the documented stereo line inputs are unbalanced on RCA connectors.

One practical detail that matters in live radio: the first microphone channel is designed as a priority path, with internal routing that supports talkback, off-air phone communication, and automatic Talk-Over behavior. That routing can reduce operator steps when switching between music, speech, and caller interaction.

How to Use AxelTech Oxygen 3

To use the AxelTech Oxygen 3, select the correct A/B source on each channel, set input Gain and EQ, then ride the long faders to mix into the Master output while monitoring through speakers or headphones. Use PFL to pre-listen sources and confirm levels before sending them live. For talk segments and calls, use the priority mic channel features and the telephone hybrids to manage callers and conferencing.

Set up a channel for on-air mixing

Each of the 8 channels offers two selectable inputs and a long 100 mm fader for accurate level control. This lets you keep two sources ready per channel and switch quickly without repatching, which is useful when rotating between playout, external devices, and studio sources.

1. Select the channel input (A or B) so the correct source is active for that fader.
2. Adjust the Gain control so the channel reaches working level without pushing the Master too hard.
3. Use the EQ controls (BASS, MID, HIGH) to fit the source into your program mix when needed.
4. Press PFL to listen and verify the source before sending it to the program bus.
5. Use PGM to send the channel to the program mix, then move the 100 mm fader to set the on-air level.

Work with microphones and priority routing

Oxygen 3 provides 3 microphone inputs, and mic 1 is defined as the priority channel. Its signal is internally routed for talkback (pre-fader), private off-air communication to telephone channels (pre-fader), and Talk-Over control for automatic voice and music mixing.

1. Use mic 1 when you want priority behavior such as Talk-Over and built-in routing to talkback and telephone paths.
2. Move the mic 1 fader to control mic level and to trigger monitor CUT-OFF and On Air lamp control as documented.
3. If your configuration supports it, set mic 2 and mic 3 faders to also trigger monitor CUT-OFF and On Air lamp behavior (optional configuration).

Tip: Use the priority mic channel for presenter-led shows where talkback, off-air phone coordination, and Talk-Over are part of the routine.

Handle phone calls with the built-in POTS hybrids

The console includes 2 telephone hybrids (POTS) with conference capability. Each telephone line has connections for the line and a telephone set, plus a recording output per line and a GPO-based incoming call notification.

1. Connect each telephone line using the documented RJ11 two-wire connection method for the hybrid module.
2. Use the console phone functions to bring callers into the program mix, and use conference capability when needed.
3. Use the per-line call recording output when you need a dedicated feed for logging or recording.
4. Rely on the incoming call (ring) notification via GPO to alert operators to calls without constantly monitoring the phone audio.

Monitor the show and use talkback

The monitor section provides an unbalanced stereo speaker output with CUT-OFF behavior, plus two headphone outputs for close listening. Monitoring sources can include PFL, Master, and an external source, while talkback output can switch between Master and Talkback sourced from mic 1.

1. Select what you need to monitor (PFL, Master, or external source) so you hear the right signal at the right time.
2. Use headphones when you need isolation or when speaker monitoring is not appropriate in the studio.
3. Use talkback switching to route communication as required, with Talkback sourced from mic 1 per the documented design.

Technical Specifications

These specifications summarize user-relevant electrical, audio, and connectivity details for the AxelTech Oxygen 3 so you can plan power, wiring, and operating levels.

Troubleshooting

The official AxelTech Oxygen 3 documentation provided here focuses on features and specifications rather than step-by-step fault isolation. Use the table format below to document symptoms, check cabling and routing choices, and confirm power and monitoring configuration before escalating.

If you need help beyond these documented capabilities, contact AxelTech support and reference the Oxygen 3 configuration, connected sources, and which outputs you are using.

Next Steps

After reviewing this guide, map your studio sources to the 8 channels and decide which inputs should use A versus B for fast switching during shows. Plan your phone workflow around the two built-in POTS hybrids, including call recording outputs and the GPO ring notification. If you need connector adapters such as SubD-to-XLR for balanced Master outputs or optional side panels, confirm options with AxelTech before final installation.

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We research product documentation and create structured setup guides, troubleshooting references, and specification summaries to help users get the most out of their devices.

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