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Dorrough 280-D2192-XLR Digital Double Scale Loudness Meter

BH #DO280D2192XL • MFR #280D2192XLR
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Dorrough 280-D2192-XLR Digital Double Scale Loudness Meter
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Dorrough 280-D2192-XLR Overview

The Dorrough 280-D2192-XLR Digital Double Scale Loudness Meter is a two-channel digital AES/EBU reading stereo meter with an external power supply. This horizontal linear display reaches past the previous 96 kHz meters to a full 192 kHz and comes with XLR connections. The 280-D2192-XLR also features double scaling which means that both analog and digital readouts appear by each LED.

All 280D models are designed for horizontal insertion directly into the digital data-stream and display material content average loudness and peaks. Following the gap between peak and average levels is easiest way to see your limiter action. You also get buffered output for digital signal line loop-through.

Straight Line Display
The 280D Series is functionally identical to the 40D 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 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. The close side-by-side positioning of the two monitored channels facilitates critical comparisons.
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.
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-D2192-XLR Specs

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, +/- 0.25 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
Step Size Error
+/- 0.25 dB
Absolute Error
+/- 0.25 dB model
Drift
+/- 0.25 dB
Average Time Constant
600 mS, +/- 6%
Peak Acquisition Period
10 uS, to full-scale, sine input 25 kHz
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
5 x 1.5 x 5" (2 x 0.6 x 2 cm)
Weight
Not Specified by Manufacturer

Dorrough 280-D2192-XLR Reviews

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