The Audemat Digiplexer 246 is a versatile device designed for radio and TV broadcasters, stations, and telecommunication operators. It integrates several key functions into a single unit, making it an "all-in-one" solution for broadcast needs.
Function Description:
The Digiplexer 246 serves as a digital audio processor, stereo encoder, RDS encoder, and includes embedded audio backup capabilities. With the optional FM Modulator and Amplifier, it can also function as an FM transmitter. It offers I/O remote control for comprehensive site management and TCP/IP connectivity for remote access. The device is designed to deliver high-quality audio processing based on a powerful DSP hardware platform, aiming for superior sonic clarity and precision.
Key Features:
- Sound Processor: Available in 1, 2, or 4 bands, with software upgradeability for 2 or 4 bands.
- Stereo Encoder: Integrates stereo encoding functionality.
- Audio Backup: Provides an additional audio source (file or MP3 stream in Shoutcast format) to replace analog or AES inputs in case of failure. The sampling frequency for audio files must be 48 kHz.
- Advanced Audio Backup (Optional): Allows for the creation and management of embedded playlists to replace analog or AES inputs upon failure.
- RDS Encoder: Implements the European standard CENELEC EN50067 for RDS, supporting functions like automatic frequency changing, station name display, radio text, and pre-select button memorization. It also supports data transmission for traffic data, paging systems, remote control, and differential GPS data.
- FM Modulator and Amplifier (Optional): Transforms the unit into a transmitter with adjustable power (0.5 W, 20 W, or 100 W) and frequency (87.5-108 MHz in 10 kHz increments).
- I/O Remote Control: Offers a total control solution for managing inputs and outputs.
- Power Backup System: Ensures continuous operation.
- Network Connectivity: Supports TCP/IP for remote applications and audio IP streams.
Important Technical Specifications:
- Dimensions (WxHxD): 485 x 135 x 535 mm (3 U high).
- Weight: Approximately 14 kg.
- Operating Temperatures: +5°C to +45°C (nominal performance), -20°C to +70°C (storage).
- Electrical Specifications:
- Voltage: 90 to 265 VAC, 47 to 63 Hz.
- Wattage Consumption: Approximately 70 W (0.5 W amplifier), 100 W (20 W amplifier), 320 W (100 W amplifier) at 230 VAC.
- Analog Input:
- Quantity: 1 stereo.
- Level: 2 ranges: +12 or +24 dBu (jumper selectable).
- Impedance: 600 Ω / 10 KΩ (jumper selectable).
- Connector: XLR female balanced and EMI suppressed.
- Digital Input:
- Quantity: 1 stereo.
- Standard: AES 3.
- Sampling Rate: 44.1 to 192 kHz – 24 bits.
- Connector: XLR female balanced and EMI suppressed.
- SCA/RDS Input:
- Quantity/Connector: 1 BNC female connector.
- Level: +24 dBu, identical to the MPX output (adder).
- Type: Adder (jumper selectable).
- Analog Output:
- Quantity: 1 stereo.
- Level: 2 ranges: +12 or +24 dBu (jumper selectable).
- Impedance: Minimum load impedance 300 Ω at +24 dBu.
- Connectors: XLR male balanced and EMI suppressed.
- Digital Output:
- Quantity: 1 stereo.
- Standard: AES 3.
- Sampling Rate: 44.1 to 192 kHz – 24 bits.
- Stereo Generator Output:
- Quantity: 1 output (MPX or 19kHz pilot, software selectable).
- Level: 2 ranges: +6 or +18 dBu (jumper selectable).
- Impedance: Minimum load: 35 Ω at +18 dBu.
- Connectors: BNC female – EMI suppressed.
- Audio Performances:
- Processing Delay: 1.5 to 5.5 ms (depending on presets and audio path).
- Frequency Response: FM: 30 Hz – 15 kHz +/-0.2dB; FmHQ: 30 Hz – 17 kHz +/-0.2dB; HD: 30 Hz – 20 kHz +/-0.2dB (de-emphasized).
- Noise: <-90 dB (de-emphasized).
- Distortion: <0.02% THD (de-emphasized).
- Separation: >70 dB.
- RF Output (with optional amplifier):
- Power: Adjustable 1-110 W or 1-22 W (depending on version).
- Frequency: 87.5-108 MHz, adjustable in 10 kHz increments.
- Spurious Rejection: > 75 dBc (87.5 to 137 MHz band), > 70 dBc (beyond). (Not applicable to 0.5 W version).
- Frequency Stability: < 5 ppm/year.
- RF Output / Audio Performances:
- Undulation: < 0.25 dB.
- Distortion: < 0.1%.
- Separation M/S: < -55 dB.
- Crosstalk L/R: > 45 dB.
- Residual AM: < -60 dB.
- C/N Ratio: > 65 dB.
- Input/Output Modules (Optional):
- Digital Inputs: 16 digital inputs on a female SUB-D 25.
- Relay Outputs: 8 relay closures on a male SUB-D 25.
- Analog Inputs: 8 analog inputs on a female SUB-D 25.
- Five slots are available for up to 4 digital input modules, up to 5 relay output modules, and up to 1 analog input module.
- Redundant Power Supply (Optional): Ensures uninterrupted operation if one power supply fails and includes a UPS for power failure alarms.
Usage Features:
- Front Panel Application: Provides access to various applications for configuration, status monitoring (transmission, RDS, audio backup), and system settings. It features a touch screen with a virtual keyboard for data entry. Default login is "Admin" / "admin".
- Remote Applications: "Radio All In One" (main application for RDS, audio backup, transmitter, and system configuration), "Digiplexer Sound Process" (sound processing), "ScriptEasy" (remote control and automation), and "MasterView" (end-user viewing tool) can be launched from a PC via network connection.
- Web Interface: An embedded web site allows downloading remote applications and managing product identifiers and network settings.
- Configuration Management: Settings can be backed up and restored, allowing for easy transfer of configurations between units. Backup files ('.aud' extension) can be saved locally or to a USB key.
- RDS Setup: Comprehensive configuration of the RDS encoder, including DSN (Digital Service Network) and PSN (Program Service Name) management, TA (Traffic Announcement) and EON TA (Enhanced Other Networks Traffic Announcement) settings, reference tables, radiotext, and ODA (Open Data Applications) parameters. Full RDS option expands DSNs to 10 and EON PSNs to 9.
- Audio Backup Management: Basic audio backup allows uploading WAVE, MP3, or MP2 audio files (max 300 MB) or configuring MP3 stream inputs. Advanced audio backup enables playlist creation and management.
- Transmitter Configuration: With the optional FM Modulator, users can enable the RF transmitter, set frequency, and power, and configure 3dB and VSWR alarm thresholds.
- Status Monitoring: The 'Status' page provides a summary of vital parameters like CPU temperature, HDD temperature, CPU load, fan speed, disk usage, and uptime. User-defined alarm thresholds can be set for critical parameters.
- Event Log: Records system events, including sub-system, start/end time, severity, event type, and description. Logs can be filtered by date and exported to CSV.
- User Management: Three user levels for web and software accounts (Administrator, Guest, Local Administrator) and FTP accounts (Administrator, Update Manager, Music) with varying access rights.
- Network Configuration: Supports static or dynamic IP addresses (DHCP) for primary and secondary interfaces, DNS server configuration, and port redirection.
- PPP Dialout/Dial-in: Allows network connection over a dial-up telephone line for sending alerts or accepting incoming connections. Can be configured as an Ethernet backup.
- SNMP Agent: Supports SNMPv1 and SNMPv2c for monitoring and notifications, including traps (TRAP V1, V2c, or INFORM V2c) and life sign traps.
- Notifications: Configurable notification types (e.g., Equipment On, Heartbeat, Configuration changed, Equipment Fault, RF alarms, Fan status, PSU status) with options for acknowledgment mode (Send and Forget, Resend until acknowledged).
- I/O Log: Displays filtered input/output events with date, sub-system, I/O name, value, and unit.
- Application Options: Allows changing the application language and setting the path for the sound processing application.
- Front Panel Timeouts: Configurable disconnection and return to status timeouts, and blank touchscreen duration.
Maintenance Features:
- Dust Filter Installation: Instructions provided for installing a dust filter to protect the unit in certain environmental conditions.
- Reset Button: Used to restart the unit.
- Support Page: Provides options to restart embedded software, reboot equipment, shut down equipment, reset configuration to default, and clear the event log.
- Firmware and Software Updates: Procedures for upgrading the device with new software options and band upgrades (2 or 4 bands).
- Lithium Battery Caution: Specific instructions for battery replacement to prevent explosion risk, emphasizing contacting Audemat and proper disposal.
- Safety Instructions: General safety guidelines include operating within specified conditions, ensuring proper ventilation, using grounded plugs, avoiding cutting protection conductors, verifying nominal voltage, and using shielded cables.
- Qualified Staff: Any maintenance, adjustment, or repair must be carried out by qualified staff.
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