Product Description

Accepting up to 8 channels of baseband or Dolby® Digital (AC-3), Dolby Digital Plus, or Dolby E encoded audio via AES or HD/SD-SDI I/O, LQ-1000 provides simultaneous LKFS loudness measurements for two independent programs (5.1+2) plus a downmix per ITU-R BS.1770-3 and EBU R128 standards.

Color-coded loudness values and bar graph meters with adjustable integration times are easily visible on the vibrant front-panel display along with a loudness histogram, True Peak readings, and dialnorm and coding metadata values.

Individual loudness logs for both the primary and secondary audio inputs covering the past 24 hours, 48 hours, 7 days, and a user-defined time period are available via the built-in HTTP server allowing stations to keep records of their loudness measurements.

A rear-panel VGA output allows information to be viewed on an external monitor or multi-viewer while full IP remote control support including metering displays is available via the provided NfRemote PC application. Many existing units can be upgraded to support remote connectivity – please contact Linear Acoustic for details.

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Additional Information

Metering Standards

ITU-R BS.1770-3 and EBU R128

Audio Input and Decoding

Baseband (PCM) input plus Dolby Digital (AC-3), Dolby Digital Plus, and Dolby E decoding standard


Four 75-Ohm AES inputs and outputs via female BNC connectors; Outputs of selected inputs: AES, De-embedded SDI, Dolby decoded. Signal levels per SMPTE 276/AES-3ID-2001


Auto-sensing HD/SD-SDI (SMPTE 292M/259M) inputs up to 1080i/60/59.94/50Hz, access to all 16 audio channels plus VANC metadata per SMPTE 2020M methods A and B.
Re-clocked HD/SD-SDI output

Headphone Output

I/4’’ (6.35mm) front panel connector with volume control

Parallel GPI/O Control Port

25-pin female D connector, 0-5V TTL levels for external start/stop/reset and alarms

Serial Metadata Input

9-pin female D connector, 115 kbps per SMPTE 207M (RS-422/485): Directly interfaces with Dolby metadata (SMPTE RDD6)

VGA Output

640×480 for connection to external monitor or multi-viewer


Gigabit Ethernet via RJ45 for remote control, HTTP access, and network logging.

Remote Control

Windows®-compatible TCP/IP remote control with included application for full setup and control, ITU-R BS.1770 metering for all programs, encoder statistics, and return audio for remote monitoring (network speed permitting). HTTP server allows get/set control from PC.

Power Requirements

Dual power supplies, each rated at 100-240 VAC, auto-ranging, 100 W maximum

Dimensions and Weight

3.5”H (2RU) x 19”W x 17”D; (89 x 483 x 432mm)

Net weight 10.8 lbs. (4.9 kg), approximate.

Shipping Weight and Dimensions

22”W x 20”D x 9”H (559 x 508 x 229 mm)

Net weight:16 lbs. (7.3 kg), approximate.


Complies with the European Union Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS), as amended by Commission Decisions 2005/618/EC, 2005/717/ EC, 2005/747/EC (RoHS Directive), and WEEE.


Standard 2-year limited parts and labor

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