Features

• Monitor off-air analog FM and HD Radio signals (HD1-HD8) on the Hi-Res Front Panel Touch Display and via the Web from anywhere in the world.

• The 3U package features a 7-inch graphic touch screen display, wide-range LED level meters with rear-panel tallies.

• The 551 collects the history of signal parameters and displays HD Radio™ album artwork, station logos and similar visuals on the front panel display and remote Web interface.

• Front-panel alarms and/or rear-panel ‘tallies’ indicate Audio Loss, Low Signal, RDS Errors, HD Loss, HD Power, FM/HD1 Alignment, HD Artist Experience, and many others.

• Spectrum graphs include RF Baseband, MPX and Left/Right Audio. O-Scope views for MPX, Pilot, RDS and all Audio Channels.

• Measures real-time audio diversity delay between the FM and HD1 broadcast.

• Fulltime off-air program audio is available simultaneously as L/R-analog, AES3-digital and Dante®-based AES67 AoIP streaming, all with adjustable levels, plus a multi-listener Internet IP stream and front-panel headphone jack.

Specifications

Tuning Range

87.5MHz-107.9MHz in 100kHz steps

Antenna Input:

75-ohm (F)

High Level RF Input:

50-ohm (BNC)

Sensitivity/SNR:

10dBuV required for 50dB mono-FM SNR, unweighted.

Reception Modes:

FM: Stereo / Forced Mono

HD Radio: HD1 through HD8

FM/HD1: ‘Split Mode’ delivers L+R FM to the left audio channel and L+R HD1 to the right.

Off-Air Frequency Response:

FM: ±.1dB, 20Hz-15kHz

HD Radio: ±0.25dB, 20Hz-20kHz

Stereo Separation:

FM: 60dB, 20Hz-15kHz

HD Radio: 90dB, 20Hz-20kHz

Distortion:

FM: <0.01% THD, 20Hz-15kHz

HD Radio: <0.003% THD, 20Hz-20kHz

FM De-emphasis: 75µs, 50µs or None, menu-selectable

Program Audio Outputs:

‘Assignable’ outputs utilize XLR connectors, ‘Dedicated’ outputs are RJ45 jacks per StudioHub® spec. (model 551 only)

Balanced Analog: Left and Right outputs adjustable from –15dBu to +15dBu in 0.1dB steps; 200Ω source.

AES Digital: Adjustable from –30dBFS to 0dBFS in 0.1dB steps; 44.1kHz sample rate; 110 Ω transformer-coupled.

Dante/AES67 Compatible: (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.

Headphone Jack: (¼” TRS) with adjustable listening level.

Listening Stream: Web browser ‘remote listening’ stream uses 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.

Composite/MPX Output: (BNC) may be switched between MPX and 19kHz stereo pilot sample; adjustable from 1Vpp to 6Vpp in 0.05V steps.

LAN Port:

LAN connection to local network or Internet provides remote monitoring, control, listening and full SNMP implementation; user-programmable network setup and streaming parameters.

General Purpose Outputs:

Ten individual open-collector NPN transistor closures to ground are associated with alarm functions. Each is programmable for GPO assignment and logic polarity.

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 & use statistics.

HD PAD Data Displayed:

Overview: Short Name • Universal Name •
Station ID • Slogan• Message • Station
Location • Service Mode • TX Blend • Emergency Alert

HD1-HD8, each:

Slogan • Program Type • Artist • Title • Album • Codec Mode • Bitrate • TX Gain • Logo/Artist Experience graphics and file details.

Bargraph & Numerical Level Metering:

Analog FM: Carrier Modulation • Stereo Pilot & Subcarriers • Demodulated L/R & L+R/L-R • Stereo Separation • Stereo Crosstalk • BS.1770 Loudness • Synchronous & AM Noise.

HD Radio: (simultaneously for HD1 and three other preselected HD programs)
L/R Audio • BS.1770 Loudness (absolute and relative to Analog FM Loudness).

FM/HD1 Alignment: Timing offset and level and phase discrepancies between programs; ‘Confidence Factor’ display.

Graphic Displays/Plots: RF Spectrum • MPX Spectrum • Audio Spec­trum • Audio XY • Audio O’scope • FM Modulation History • Audio Level History • Metrics History • FM/HD1 Time & Level Alignment History • BandScanner™ utility.

Alarms: Most alarms have multiple parameter settings. All alarms can send text or email notifications. Alarms are also logged: daily, weekly, monthly._

Analog FM: Carrier Overmod • Audio
Loss • Low Signal • RDS Loss • PI Error • RT Update • Pilot Loss

HD Radio: HD Loss • Program Loss • Audio Loss • HD Power Level • FM/HD1 Alignment • PSD Update • Logo Receipt • Artist Experience Update • Image Issues • Emergency Alert Updates

Real-Time Clock:

Auto-sets to Internet time; auto/manual DST setting; battery backup.

Power Requirement:

88-264Vac, 18W.

Operating Environment:

32°F/0°C-122°F/50°C; 0%-95% non-condensing
relative humidity; 10,000ft/3048m

Size and Weight:

25”H x 17”W x 3”D; 8 lbs. shipping weight.