在线亚洲97se

    1. <form id=AJYEF><nobr id=UrQpk></nobr></form>
      <address id=MKtcO><nobr id=UacbT><nobr id=zVcas></nobr></nobr></address>

      HD Radio? Alignment Processor

      Share on Facebook Share on Twitter

      The JUSTIN 808 maintains time alignment between analog FM and HD1 channels to within 23 microseconds (±1 sample).

      The JUSTIN 808 only makes its time-alignment adjustments to the HD1 channel leaving the critical FM transmission untouched - an important distinction when choosing a time-alignment processor.

      No more lost words, stuttering, echoes, or level shifts. The entire sync process is 100% automatic, and the JUSTIN’s Web interface features SNMP support and dispatches e-mail and SMS alarm messages.

      Approved by DTS/iBiquity for HD Radio?.

      "This is the kind of thing that will help make HD Radio better for listeners, car dealers, and the industry in general, by eliminating blending problems…"

      - Paul Shulins, Greater Media Boston.

      Features


      • Precise time alignment between analog FM and HD1

      • Automatic phase correction and RMS gain leveling

      • Insert in either the FM or HD Radio? AES digital feed

      • Full Web interface for remote control, metering, etc.

      • SMS/email alarms for loss of signal and loss of audio

      • Extensive data logging with graphic display

      • Auto failover with relay bypass


        Online Demo Available

      Reviews

      It really is a "set it and forget it" device. A dedicated device such as the Justin 808 eliminates the concern for rock solid FM+HD1 diversity delay. The carrier, HD1 and silence alerts are also very welcomed and appreciated.

      - Mike Friedman: Commonwealth Public Broadcasting, Richmond, VA

      HD/FM Time Alignment and Blending

      - Radio Guide Vol. 23 No 4 HD/FM Time Alignment and Blending

      The JUSTIN 808 - Keeps HD in Sync

      - Clay Freinwald The JUSTIN 808 - Keeps HD in Sync (pdf)

      Specifications


      CONNECTIVITY

      Receiver Input

      • 75-ohm ‘F’ connector. Receiver tunes 87.5 to 107.9MHz in 200kHz steps. An RF input level of 20dBμV or more assures reliable operation.
      • AES Digital Audio I/O:AES3 (XLR) digital audio loop-through; 44.1kHz sampling rate
      • Network Interface: LAN (RJ45) connection to local network and through user’s router to Internet for full Web Interface remote control and monitoring.

      PLACEMENT IN AIRCHAIN

      In HD Radio AES Audio Feed

      Placed in line with the AES audio feed to the HD Radio? exciter, the JUSTIN 808 will automatically correct diversity delay errors and r.m.s. level errors between the FM and HD1 programs.

      In Analog FM AES Audio Feed

      Placed in line with the AES audio feed to the analog FM stereo encoder, the JUSTIN 808 is capable of providing the entire diversity delay, if required. It will automatically correct diversity delay errors, but cannot normalize r.m.s. level errors between the two programs.

      DELAY CORRECTION

      Correction Resolution

      Corrects to ±1 sample (±23 μs)

      Maximum Delay Error Correction

      16 seconds

      Time Required to Correlate Delay Errors

      Small delay errors (up to 0.4 seconds) require up to 30 seconds to correlate; delay errors of 10 seconds could require as much as 3.5 minutes.

      “Catch-Up” Button Feature

      A front-panel menu item, also accessible via the Web Interface, permits a manual time alignment quick reset to a previous long-term mean value. This obviates correlation acquisition and brings time alignment close to the required figure.

      AUDIO LEVEL AND PHASE CORRECTION

      The JUSTIN 808 offers automatic program phase correction when a phase reversal is sensed between the analog FM and digital HD1 program channels. R.M.S. level correction is also available when the JUSTIN 808 is placed in the AES digital audio feed to the HD Radio? exciter.

      ALARMS AND LOGGING

      Alarm Conditions

      1.RSSI(Low RF signal) 2.Audio Loss or Levels Out of Range

      • AES Loop-Through
      • Off-air FM Audio
      • Off-air HD1 Audio

      3.Out of Alignment Range(user preset)

      Alarm Indications

      1.Front-panel OLED display

      2.Rear-panel ground-closure ‘tallies’ with selectable logic polarity

      3.SMS-text/email notifications via SMTP

      4.JUSTIN 808 Webpage indication

      Alarm Logging

      All alarms are logged by the JUSTIN 808; statistics are presented graphically via the Web Interface and may be downloaded for follow-up study.

      Web Interface

      The JUSTIN 808 Web Interface is compatible with desktop/laptop computers, tablets and smart phones, and supports SNMP with a downloadable MIB file. All functions available at the front panel are duplicated by the Web Interface.

      MISCELLANEOUS

      Power Requirements

      105 - 130VAC or 210 - 260VAC, 50/60Hz; 20 watts

      Size and Weight

      1?”H x 19”W x 9”D (1U); 10 lbs. (shipping weight)

      Environmental

      Continuous operation at ambient temperatures between 32?F/0?C and 122?F/50?C; 0-95% relative humidity, non-condensing, altitudes to 10,000ft/3,048m.

      HoMEmenuCopyrights 2015.All rights reserved.More welcome - Collect from power by english Blok number sss85786789633111 Copyright