Dorrough 280D3 Digital Loudness Meter-39dB 32-96K -18 Reference

BH #DO280D3 • MFR #280-D3
Dorrough
Dorrough 280D3 Digital Loudness Meter-39dB 32-96K -18 Reference
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Expected availability: 7-14 business days
$807.50

Important Notice

  • This item is noncancelable and nonreturnable.

Dorrough 280D3 Digital Loudness Meter-39dB 32-96K -18 Reference

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Dorrough 280-D3 Overview

  • 1Description
  • 2Straight Line Display
  • 3Dual Channel Meter
  • 4Peak and Average Metering
  • 5Right and Left Inputs for Stereo Mixing

The Dorrough 280D3 Digital Loudness Meter-39dB 32-96k -18 Rfrn is a two-channel digital-reading stereo loudness meter in AES/EBU linear style, designed for insertion directly into the digital data-stream. It has a dual-channel horizontal linear display with 39dB headroom, and an external power supply. The 280-D3 is referenced at -18dB for the EBU standard. Compatible formats 32, 44.1, 48, 96ks. 110 and 75 ohm inputs.

This model is designed for console mounting, rackmounting, or custom installations. It is built with XLR, DIP switch assignments, and mini DIN pin out. A mating connector prewired to the power pack is also supplied. A wired remote control option is also available.

Straight Line Display

The 280 Series is functionally identical to the 40 series, except that the 280s have a straight-line scale designed for applications with limited horizontal space. These easy-to-read meters are made to install easily in a custom console or in a rack with optional rack mounts.

Dual Channel Meter

These meters are ideal for situations where many channels must be monitored in limited space, such as a mobile news van or crowded control room. It has a dual-channel horizontal linear display with 39dB headroom, and an external power supply. The 280-D3 is referenced at -18dB for the EBU standard. Compatible formats 32, 44.1, 48, 96ks. 110 and 75 ohm inputs.

Peak and Average Metering

The Dorrough 280 digital meters feature both peak and average level display simultaneously, over indication, and selectable peak hold. They conform to all AES 3 (1992) specifications, and are compatible to 96ks.

Right and Left Inputs for Stereo Mixing

With one instrument, the operator can easily see the stereo mix and avoid classic in-phase/out-of-phase problems as well as center channel buildup that causes a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.

Dorrough 280-D3 Specs

Input Impedance20k Ohm balanced, 10k Ohm single-ended, +/- 2%
Common Mode Rejection Ratio80 dB at 60 Hz, 60 dB at 20 kHz (balanced mode)
Input Sensitivity-10 dB for full-scale display
Maximum Input Level+24 dB before clipping
Signal Path Bandwidth10 Hz - 25 kHz, +/- .25 dB
Signal Path DistortionLess than 1% THD at 1 kHz, +24 dB input
Sum ErrorLess than 0.1 dB at 1 kHz
Difference ErrorLess than 0.1 dB at 1 kHz
Display Resolution40 LEDs, 1 dB/LED except model 60D, +/- 0.25 dB.
Step Size Error+/- 0.25 dB
Absolute ErrorFull Scale -39 dBu: +/- 0.25 dB model
Drift+/- 0.25 dB
Average Time Constant600 mS, +/- 6%
Peak Acquisition Period10 uS, to full-scale, sine input 25kHz
Peak Attack PeriodVirtually Instantaneous
Peak Decay Period180 mS, from full-scale to all LEDs off
Display Update RateApproximately 10 mS
Display Duty CycleDisplay Time, AVERAGE, PEAK HOLD - 75%; Display Time, PEAK - 100%
Power Supply Input Range117/237 VAC RMS, -20% to +10%, 50-60 Hz
Calibration ControlsNone needed
User ControlsLeft/Right input sensitivity Option DIP Switch

A) Peak Auto [ON]

B) Difference Mode [ON/OFF]

C) Over Level Alarm [ENABLE]

D) Under Level Alarm [ENABLE]

E) Auto ARMP

User PortDB-9 Connector

A) Alarm relay closure contacts 1 form C, 1A, 30V AC or DC

B) Mode control switch (user supplied)

C) PEAK function switch (user supplied)
Dimensions (WxDxH)5.0 x 7.0 x 1.5" (in.) (2.0 x 2.8 x 0.6cm)
WeightNot Specified by Manufacturer
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