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

B&H # DO280D3 Mfr # 280-D3
Usually ships in 7-14 business days

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This is a special order item and is non-cancelable and non-returnable. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment.

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You Pay: $807.50

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.
Input Impedance 20k Ohm balanced, 10k Ohm single-ended, +/- 2%
Common Mode Rejection Ratio 80 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 Bandwidth 10 Hz - 25 kHz, +/- .25 dB
Signal Path Distortion Less than 1% THD at 1 kHz, +24 dB input
Sum Error Less than 0.1 dB at 1 kHz
Difference Error Less than 0.1 dB at 1 kHz
Display Resolution 40 LEDs, 1 dB/LED except model 60D, +/- 0.25 dB.
Step Size Error +/- 0.25 dB
Absolute Error Full Scale -39 dBu: +/- 0.25 dB model
Drift +/- 0.25 dB
Average Time Constant 600 mS, +/- 6%
Peak Acquisition Period 10 uS, to full-scale, sine input 25kHz
Peak Attack Period Virtually Instantaneous
Peak Decay Period 180 mS, from full-scale to all LEDs off
Display Update Rate Approximately 10 mS
Display Duty Cycle Display Time, AVERAGE, PEAK HOLD - 75%; Display Time, PEAK - 100%
Power Supply Input Range 117/237 VAC RMS, -20% to +10%, 50-60 Hz
Calibration Controls None needed
User Controls Left/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 Port DB-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)
Weight Not Specified by Manufacturer
Dorrough 280D3 Digital Loudness Meter-39dB 32-96K -18 Reference
  • Power Adapter
  • A Mating Connector, Prewired to the Power Pack
  • 2-Year Warranty
  • Comprehensive -  EXF Series XLR Male to XLR Female AES/EBU Cable - 3'
    • You Pay: $15.99
     

    Mounting

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    Dorrough -  Desktop Box for Dorrough 280 Series Meter
    • You Pay: $75.95
    Usually ships in 7-14 business days i This is a special order item and is non-cancelable and non-returnable. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment.
     

    Rack Accessories

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    Dorrough -  Rack Adapter for 1 Dorrough 280 Series Digital Meter
    • You Pay: $43.92
    Usually ships in 7-14 business days i This is a special order item and is non-cancelable and non-returnable. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment.
     

    Cable Management

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    • You Pay: $6.99
     

    Engineer's Essentials

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