Dorrough electronics 40-A2 Loudness monitor

Name: Dorrough 40-A | Analog Loudness Monitor
Brand: Dorrough electronics
Price: 399 USD
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$399.00

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Brand: Dorrough electronics
Model Number: 40-A2
Product Code: BS18207
Availability: 2-3 Days

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Dorrough electronics 40-A2 Loudness monitor

The Dorrough 40-A2 is a professional analog loudness meter, designed for modern stereo recording and broadcast requirements, and offering simultaneous average and peak program display, with separate ballistics and lightning-fast response. This meter is equipped with a 40-LED bar graph, showing 1dB of resolution per LED, and 14dB of headroom.

Rack or console mounted Analog Loudness Meter with dual dedicated ballistics for simultaneous peak and average readout

Microchip processor with accuracy of oscilloscope, ultra-fast response time of 600ms average, virtually instantaneous peak for seamless continuous display of peak/average relationship

Individual left and right XLR inputs for stereo mixing applications, +4 dB factory-calibrated

Display with 40 LED's providing 1dB resolution per LED

Proprietary "A" scale with 14dB of headroom

XLR, 6 DIP switches for function assignments, mini 8-pin DIN port out for access to alarm relays, meter mode functions, and peak hold modes, standard with unit

Technical Details

Dorrough electronics 40-A2 Specs

Input Impedance	20 kOhm balanced 10 kOhm 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	>1% THD at 1 kHz, +24 dB input
Sum Error	>0.1 dB at 1 kHz
Difference Error	>0.1 dB at 1 kHz
Display Resolution	40 LEDs, 1 dB/LED
Step Size Error	+/- 0.25 dB
Absolute Error	+/- 0.25 dB (Full Scale -39 dBu)
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)	8.5 x 6.5 x 2.8" (215.9 x 165.1 x 71.1mm)
Weight	2.3 lb (1.04 kg)