NDR-3900UHF 19" Dual-Channel Auto-Sync Diversity Receiver
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Automatic Scanning and Channel Synchronization
The CHIAYO NDR-3900 features an advanced auto-scanning function, which quickly searches and locks onto interference-free channels, ensuring stable audio transmission. With one-touch operation synchronization is completed, making it perfect for multi-device environments such as educational training, corporate meetings, and public broadcasting. This feature ensures stable and efficient audio transmission across various usage scenarios.
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High Sensitivity Reception and Anti-Interference Technology
The NDR-3900 utilizes Diversity automatic selection technology, providing excellent performance and stability. Its built-in audio code and noise detection squelch circuit effectively prevent noise interference, significantly improving reception distance. Even in complex environments, it offers clear sound quality and stable audio transmission, ensuring a high-quality audio experience in school classrooms, business meetings, karaoke, and public broadcasting settings.
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Flexible Audio Output and Dual Handheld Wireless Microphones
The NDR-3900 provides balanced (XLR) and unbalanced (Ø6.3mm) audio outputs, accommodating various audio equipment needs. Its built-in MIC/LINE output switching function allows for flexible volume gain adjustment, enhancing user convenience and flexibility across different application scenarios. Whether in conferences or artistic performances, the NDR-3900 delivers exceptional sound quality. The system also includes two handheld wireless microphones, making it ideal for scenarios requiring high-quality audio transmission. This dual handheld wireless microphone design enhances system flexibility and meets diverse usage needs.
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Clear Display and Convenient Operation
The NDR-3900 features a clear and readable LCD display, showing antenna reception signal strength, channel, frequency, and audio output intensity. Convenient volume knobs and channel control buttons ensure simple and intuitive operation, providing the best reception quality and user experience. This feature ensures superior operational convenience and clear audio monitoring across various usage scenarios.
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Features
- Auto Scan quickly searches for an interference-free working channel.
- Rapid channel sync with one click.
- Channel, frequency, RF and AF meter bars, and antenna selection
- Pilotone, noise-detector and squelch circuits prevent noise, interference and improve operation distance.
- Adjustable SQ. Increases receiver range with higher sensitivity and reduces interference with lower sensitivity.
- Convenient gain/volume control(s) and switchable MIC-LINE output level.
- Single channel audio output jacks: balanced XLR.
- Mixed audio output jack: unbalanced 6.3mm.
| Model | NDR-3900 |
| Chassis | EIA standard 19" metal 1U |
| Receiving mode | Diversity |
| Frequency range | UHF 500 - 960 MHz |
| Bandwidth | 25 MHz |
| Channel | Dual |
| Preset frequencies | 100 |
| Channel sync | 1-way (RX→TX) |
| Frequency response | 50 Hz - 18 KHz |
| Peak deviation | ± 40 KHz |
| Sensitivity | S/N > 80 dBm at 10 dBμV |
| S/N ratio | > 110 dB(A) |
| T.H.D. | < 0.5% @ 1 KHz |
| Receiving antenna | Detachable at rear-end, TNC female. |
| Oscillation | PLL synthesized, frequency stability ± 0.005% (-10 - +60°C) |
| Squelch | Pilotone & Noise-cancelling dual-squelch circuit |
| Audio connector | Balanced XLR and unbalanced Ø6.3mm |
| Audio Output Adjustment | Volume knob for adjustment of output volume |
| Output level switch | MIC-LINE |
| Power supply | 12V DC / 1.0A |
| Dimensions (mm) | 420 × 205 × 44 |
| Weight (kg) | 1.9 |
