Dorrough Digital Loudness Meter-39dB

Dorrough 12-AES Digital Meter-39dB

Dorrough 12-AES Digital Meter-39dB

B&H # DO12AES MFR # 12-AES
Dorrough Digital Loudness Meter-39dB

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Overview
  • 1Description

The Dorrough 12-AES Digital Meter-39dB lets you produce hotter tracks without crashing. The 12-AES is a stereo AES/EBU meter formatted in the classic arc style. It is compatible to 96ks, 110/75 ohm inputs, with meter measurement to -39dB.

Dorrough Digital Meters also feature specially engineered multi-mode PEAK-HOLD functions for digital recording. This model outfitted with a remote control (Dorrough RW 100) that provides up to four meter connections. The remote handles both digital and analog metering controls.

The 12-AES digital meters accept AES/EBU or SPDIF signals. The chasis is a standard rackmount unit. It is also compatible with consumer 16-bit digital formats.

Actual Energy Display
Dorrough Loudness Meters display actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. This feature allows all program material to be adjusted for equal perceived loudness while protecting the peak of the waveform.
Dual Displays
With these easy-to-read digital loudness monitors you can view two channels or projects simultaneously, side-by-side. They are made to install easily in a custom console or with optional rack mounts. Dorrough rack adapters for the model 12 series are available with cutouts for either single or double meters. Both are 2RU high and 19" wide.
Peak and Average Digital Metering
The 12-AES simultaneously displays peak and average, in this model to -39dB. Since both the AVERAGE and PEAK are linked to the same data, ncreasing "density of sound" is clearly indicated by the AVERAGE LEDs building up ever closer behind the PEAK! This feature in the Dorrough digital loudness meters provides a state-of-the-art means of highly effective graphic monitoring.
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 can cause a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.
In the Box
Dorrough 12-AES Digital Meter-39dB
  • 2-Year Warranty
  • Table of Contents
    • 1Description
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    Specifications
    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 Less than 0.1 dB at 1 kHz
    Step Size Error +/- 0.25 dB
    Absolute Error Full Scale -39 dBu: +/- 0.25 dB model A,B,C
    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 (models A, B, C)
    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 Each Meter:

    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 Each Meter:

    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) Not Specified by Manufacturer
    Weight Not Specified by Manufacturer
    Packaging Info
    Package Weight 2.15 lb
    Box Dimensions (LxWxH) 11.4 x 8.6 x 5.5"

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