Dorrough 40-AE Analog Loudness Meter

Dorrough 40-AE Analog Loudness Meter

Dorrough 40-AE Analog Loudness Meter

B&H # DO40AE MFR # 40-AE
Dorrough 40-AE Analog Loudness Meter

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Product Highlights

  • +43dB Range
  • 1dB Steps
  • 3 Colors

You Pay: $449.95

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  • 1Description

The Dorrough 40-AE Analog Loudness Meter +43dB is a loudness meter with a large display scale allowing 43dB of headroom in 1dB steps and XLR left and right connectors. The headroom scale is identical to the AES/EBU Digital Standard.

This three-color meter provides access phase correlation, peak hold, sum/diff, and reference mode allowing 0 reference setting to .1dB accuracy, directly or with the optional remote control. Rackmounting is required.

Dual Displays
With these easy-to-read monitors you can view two channels or projects simultaneously, side-by-side. They are made to install easily in a custom console or in a rack with optional rack mounts.
Peak and Average Level Metering
The 40-AE, like all Dorrough loudness meters, simultaneously displays peak and average, in this model up to +43dB. The relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.
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.
In the Box
Dorrough 40-AE Analog Loudness Meter
  • 2-Year Warranty
  • Table of Contents
    • 1Description
    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 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) 8.5 x 6.5 x 2.8" (in) (3.3 x 2.6 x 1.1cm)
    Weight Not Specified by Manufacturer
    Packaging Info
    Package Weight 5.0 lb
    Box Dimensions (LxWxH) 11.5 x 9.0 x 5.0"

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