- Main Features:
- Unexcelled off-air reception of analog-FM broadcasts with highly-accurate displays of total modulation and other measurements, even in the presence of on-channel or adjacent-channel HD Radio carriers at any level.
- Intuitive, menu-driven setup from the front panel, or remote setup and operation with the built-in Webserver that may be addressed over any IP network by computer or mobile device. The 541 supports full SNMP remote control and monitoring.
- Graphic front-panel and remote display of all level metering; FFT spectrum analysis of IF passband, MPX baseband and program audio; oscilloscope display of program audio and stereo XY.
- Alarms for a range of signal faults, with tallies and SMS/text or email message dispatches to specific individuals for various alarm conditions. All alarms are logged chronologically as well.
- Analog, AES3-digital, HTTP/UDP Web-streaming and independent AoIP-streaming program audio outputs, plus an FM composite/MPX baseband output.
- The BandScanner™ utility scans the FM spectrum and displays each station with its signal level, PI code and call sign.
- StationRotation™ mode enables automatic sequential monitoring of multiple station presets.
- Collects and logs a history-over-time of FM and audio signal parameters.
- Accurate program loudness measurement to the human perception ITU-R BS.1770 (‘LU’) loudness specification.
- Stays on-channel and retains measurement setups through signal and power losses.
- Specifications:
- Tuning Range: Tunes 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 (for 50dB monaural SNR):
-5dBµV or better with de-emphasis.
-15dBµV or better unweighted. - Reception Modes: Stereo / Forced Mono / SCA Program Audio
- FM BASEBAND:
(Off-Air or High Level; (D) indicates measurements taken with de-emphasis.)
-Frequency Response: ±0.25dB, 10Hz-100kHz.
-Signal-to-Noise (D): >83dB.
-Distortion (D): <0.01% THD+N; <0.01% IMD (SMPTE, 60Hz/7kHz, 4:1).
-FM Deviation: Indicates composite (total) and independent positive and negative deviations. ±75kHz = 100% Modulation; 0-200% metering with ±1% accuracy. *AM Noise (D): Measures down to 87dB below 100% AM Modulation.
-FM Stereo Pilot: Indicates 0-15% pilot injection; pilot frequency readout has ±0.1Hz accuracy.
-FM Subcarriers: Indicates percent injection of 38kHz (residual), 57kHz RDS, 67kHz/92kHz SCA subcarriers. - FM AUDIO PERFORMANCE:
(Off-Air or High Level; taken with de-emphasis; (M) indicates measurements taken in monaural reception mode.)
-Frequency Response: ±0.1dB, 20Hz-15kHz.
-Signal-to-Noise (M): Analog Out: <0.01% THD+N; <0.02% IMD (SMPTE, 60Hz/7kHz, 4:1). Digital Out: <0.01% THD+N; <0.01% IMD (SMPTE, 60Hz/7kHz, 4:1).
-Stereo Separation: >64dB, 20Hz-15kHz
-FM Stereo Crosstalk (Main-Sub or Sub-Main): >67dB, 20Hz-15kHz,.
-FM De-emphasis: 75µs / 50µs / None. - MPX Output: (BNC) select either MPX or 19kHz stereo pilot sample; adjustable from 1VPP to 6VPP in 0.01V steps; ±0.25dB, 10Hz-100kHz.
- Program Audio Outputs:
(May be assigned to the FM-stereo program or to SCA audio. Unless otherwise noted, performance parameters reflect FM Stereo Performance cited above.)
-Balanced Analog: (XLR) Left and Right outputs adjustable from –15dBu to +15dBu in 0.1dB steps; 200Ω resistive source.
-AES Digital: (XLR) Adjustable from –30dBFS to 0dBFS in 0.1dB steps; user-selected 44.1kHz or 48kHz sample rate; 110Ω transformer-coupled.
-Dante/AES67 Compatible AoIP Port: (RJ45) Output at 44.1kHz (Dante-only) or 44.1kHz/48kHz (Dante/AES67); AoIP utility has independent IP, Audio Format and Transmit Flow settings; level adjustable from –30dBFS to 0dBFS in 0.1dB steps.
-UDP Stream: ADTS or ADTS in MPEG-TS transport.
-HTTP/Icecast ‘Casual’ Listening Stream: Web browser remote-listening stream employs HE-AACv2 encoding, 44.1kHz or 48kHz sample rate, bit-rates from 18kbps to 64kbps; accommodates up to 10 simultaneous listeners. HTTP/Icecast and raw UDP streams are available simultaneously.
-Headphone Jack: (¼” TRS) Menu-adjustable listening level.
-LAN Port: (RJ45) LAN connection to local network or Internet provides remote monitoring, control, listening and full SNMP implementation; user-programmable network setup and streaming parameters. - Bargraph & Numerical Level Metering:
Carrier Modulation • Stereo Pilot & Subcarriers. MPX Power • Demodulated L/R & L+R/L-R Stereo Separation • Stereo Crosstalk • BS.1770 Loudness • SCA Levels • Synchronous & AM Noise. - Graphic Displays and History Plots:
IF Spectrum • MPX Spectrum • Audio Spectrum • Audio Oscilloscope • Audio XY • FM Modulation History. Audio Level History • RF Metrics History. BandScanner™ utility. - RDS Fields Displayed:
PS • PI • Call • RT • RT+1 • RT+2 • PTY • PTYN • CT • M/S • DI • TP • TA • AF • ODA • Block Error Rate • Groups & Group Use Statistics. - Real-Time Clock: Auto-sets to Internet time; auto/manual DST setting; battery backup.
- Local & Remote Alarms:
Carrier Overmod • MPX Power • Audio Loss • Low Signal • Pilot Loss • Multipath • RDS Loss • RDS PI Error • RDS RT
RDS CT • RDS TMC • Pilot Loss • MPX Power. (Most alarms have multiple parameter settings. All alarms can send text or email notifications. Alarms are automatically logged daily, weekly and monthly.) - Power Requirements: 88-264VAC, Single-Phase; 12W.
- Size and Weight: 3.5”H x 19”W x 9”D (2U); 10 lbs. (shipping weight)
- Operating Environmental: 32°F/0°C-122°F/50°C; 0%-95% non-condensing relative humidity; 10,000ft/3048m.
- Conformances:
-CE: EN50081-1 / EN50082-1, 93/68/EEC
-RoHS: 2002/95/EC.
