The UHF Frequency Band Transmission Signal covers 500MHz-900MHz with 4-channel reception, offering 100 selectable frequencies per channel, stepping by 250KHz. Stable PLL digital phase-locked loop technology enhances stability, while unique ID numbers per channel reduce interference. Equipped with 2 antennas for signal reception, the receiver features balanced and unbalanced outputs. Its user-friendly design supports up to 10 units simultaneously. The handheld microphone offers RF power selection, conserving battery and extending usage to 8 hours. With a range of 80-100 meters in open environments and 50-80 meters in complex environments, it ensures reliable transmission.
| Parameter | Value |
|---|---|
| Oscillation Method | Phase-locked loop frequency synthesis |
| Frequency Range | UHF 500MHz～900MHz |
| Frequency Stability | ±0.001% |
| Modulation Method | FM |
| Signal-to-Noise Ratio | >60dB |
| Distortion | <0.5% @ 1KHz |
| Sensitivity | 1.2/μV @ S/N=12dB |
| Power Supply | DC: 12V～17V |
| Audio Output | Independent 0～400mV, Mixed ~300mV |
| Power Supply | DC 4.5V (1.5V AA3) |
| Microphone Power Consumption | 100mA |
| Carrier Frequency | UHF 500MHz～900MHz |
| Frequency Stability | ±0.001% |
| Maximum Frequency Deviation | ±30KHz |
| Signal-to-Noise Ratio | >60dB |
| Adjacent Channel Interference Ratio | >80dB |
| Dynamic Range | ≥100dB |
| Type | Capacitive |
| Polar Pattern | Single-directional |
| Frequency Response | 40Hz～20KHz |
| Microphone Sensitivity | -43±3dB @ 1KHz |
| Dimensions (W x D x H) | 420 x 220 x 44mm |
| Weight | 7.5kg |
Please check if the communication protocol of other SPON® IP audio devices has been set to NAS protocol, since the built-in web server can only identify other devices via NAS protocol.
The audio formats of IP Public Address are: MP2, MP3, AAC, etc. (MP2 and AAC are the standard designated audio formats of national DAB )
Compare of used Bandwidth: MP2: 256K-512K MP3: 64K-128K
Background Music and Announcements: The system can play music, Emergency Broadcasting.
Situation Reports: It can announce daily activity schedules, provide key points about significant events, and give updates about essential convoys passing through.
Emergency Interjections: The system can be used to urgently intercept vehicles violating rules, grant access to special vehicles, and command on-site order during chaotic situations.
Emergency Paging: If a toll booth encounters an unexpected situation, operators can use a one-touch emergency call to the control center or neighboring toll stations for immediate assistance.
Schools, especially those equipped with campus networks.
Highway Toll Stations
Chain Supermarkets
Large Enterprise.
Office Buildings and Skyscrapers.
Rural Connectivity Projects.
Any location with network connectivity can benefit from the IP public address system.
High Audio Quality: The system offers pristine fidelity through its full digitalization, utilizing CD-like quality data file formats, which are perfectly consistent with computer output.
Personalization: Built on an Internet protocol, each audio endpoint can freely choose any channel for playback, with adjustable progress, allowing for point-to-point personalized programming.
Network Integration: From teachers' courseware production and arrangement to speeches and scheduled program broadcasts, everything can be operated remotely over the network.
Remote Functionality: The system supports remote broadcasting across different cities and even countries. As long as there's an internet connection, broadcasting can be initiated.
