The Inovonics 541 is a fourth-generation FM Modulation Monitor designed to provide comprehensive information about the transmitted signal, including the RF carrier, subcarriers, audio quality, and RDS data. It features advanced DSP signal analysis, a touchscreen display, and remote operation capabilities via a built-in Webserver. Here’s a breakdown of its features and specifications:
Features:
- Off-air Reception:
- Accurate reception of analog-FM broadcasts with precise displays of modulation and other measurements.
- Capable of maintaining accuracy even in the presence of on-channel or adjacent-channel HD Radio carriers.
- Setup and Operation:
- Intuitive menu-driven setup from the front panel or remote setup and operation via the built-in Webserver accessible over any IP network.
- Supports full SNMP remote control and monitoring.
- Measurement and Analysis:
- Graphic front-panel and remote display of level metering, FFT spectrum analysis, and oscilloscope display of program audio and stereo XY.
- Alarms for various signal faults with notification via SMS/text or email.
- Audio Outputs:
- Analog, AES3-digital, HTTP/UDP Web-streaming, and independent AoIP-streaming program audio outputs.
- FM composite/MPX baseband output.
- Additional Features:
- BandScanner™ utility for scanning the FM spectrum and displaying station information.
- StationRotation™ mode for automatic sequential monitoring of multiple station presets.
- History logging of FM and audio signal parameters.
- Accurate program loudness measurement according to ITU-R BS.1770 specification.
- Retains measurement setups through signal and power losses.
Specifications:
- RF & Reception:
- Tuning Range: 76.0MHz-108.0MHz in 100kHz steps.
- Antenna Input: 75-ohm (F), 1VRMS max.
- High-Level RF Input: 50-ohm (BNC), 5VRMS max.
- Off-Air Sensitivity: 5dBµV or better with de-emphasis.
- FM Baseband:
- Frequency Response: ±0.25dB, 10Hz-100kHz.
- Signal-to-Noise Ratio: >83dB.
- Distortion: <0.01% THD+N; <0.01% IMD.
- FM Deviation: ±75kHz = 100% Modulation.
- FM Audio Performance:
- Frequency Response: ±0.1dB, 20Hz-15kHz.
- Signal-to-Noise Ratio: <0.01% THD+N.
- Stereo Separation: >64dB, 20Hz-15kHz.
- Inputs, Outputs, and Ports:
- MPX Output: BNC, adjustable from 1VPP to 6VPP.
- Program Audio Outputs: Balanced Analog (XLR), AES Digital (XLR), Dante/AES67 Compatible AoIP Port (RJ45), UDP Stream, HTTP/Icecast ‘Casual’ Listening Stream, Headphone Jack.
- LAN Port: RJ45 for remote monitoring, control, and SNMP implementation.
- Displays and Display Options:
- Bargraph & Numerical Level Metering.
- Graphic Displays and History Plots.
- RDS Fields Displayed.
- Timekeeping and Alarms:
- Real-Time Clock with auto-sets to Internet time.
- Local & Remote Alarms for various signal faults.
- Power, Environmental, Miscellaneous:
- Power Requirements: 88-264VAC, Single-Phase; 12W.
- Size and Weight: 3.5”H x 19”W x 9”D (2U); 10 lbs.
- Operating Environmental: 32°F/0°C-122°F/50°C; 0%-95% non-condensing relative humidity.
- Conformances:
- CE: EN50081-1 / EN50082-1, 93/68/EEC
- RoHS: 2002/95/EC.
These specifications represent real-world measurements and capabilities of the Inovonics 541, providing broadcasters with a comprehensive tool for monitoring and analyzing FM broadcast signals.
