Dorrough 40-P Stereo/Mono Balance Meter

BH #DO40P • MFR #40P
Dorrough
Dorrough 40-P Stereo/Mono Balance Meter
Special Order
Expected availability: 7-14 business days
$569.00

Important Notice

  • This item is noncancelable and nonreturnable.

Dorrough 40-P Stereo/Mono Balance Meter

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Dorrough 40P Overview

  • 1Description
  • 2Mono and Stereo Signal Meter
  • 3Discrete Balance
  • 4Center Balance

The Dorrough 40-P Stereo/Mono Balance Meter accepts either mono or stereo signals and displays a readout beginning at the center. Left channel level is indicated by a continuous row af LEDs fanning out to the left from center. Right channel level is indicated by a continuous row of LEDs directed out to the right from center.

When in Balanced Discrete Mode, the difference between the two sides presents a relative visual balance reference in amplitude. When in Balanced Center Point Mode, perfect parity is achieved when the two center green LEDs go dark (null mode). A jack is provided with a switch for selection between the two modes of operation.

Mono and Stereo Signal Meter

The Model 40-P Balance Meter provides convenient display of both mono and stereo signal parity as two indications starting at center scale, with signal amplitudes extending out from either side of center. Any imbalance between the two signals is displayed at a glance.

Discrete Balance

LEFT/RIGHT average is displayed as discrete left/right bars from center. This mode is activated at center "off" toggle-switch (supplied) position

Center Balance

A mathematical derivation of average center point between LEFT/RIGHT is displayed as a bar from "null" center point. Simultaneously, the crest of both left and right average is displayed as discrete segments (LEDs), one segment to the left of "null center" and one to the right. This mode is activated by switching toggle-switch to top and bottom "on" positions.

Dorrough 40P Specs

Input Impedance20k Ohm balanced, 10k Ohm single-ended, +/- 2%
Common Mode Rejection Ratio80 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 Bandwidth10 Hz - 25 kHz, +/- .25 dB
Signal Path DistortionLess than 1% THD at 1 kHz, +24 dB input
Sum ErrorLess than 0.1 dB at 1 kHz
Difference ErrorLess than 0.1 dB at 1 kHz
Display ResolutionLess than 0.1 dB at 1 kHz
Step Size Error+/- 0.25 dB
Absolute ErrorFull Scale -39 dBu: +/- 0.25 dB model A,B,C
Drift+/- 0.25 dB
Average Time Constant600 mS, +/- 6%
Peak Acquisition Period10 uS, to full-scale, sine input 25kHz
Peak Attack PeriodNot Applicable
Peak Decay PeriodNot Applicable
Display Update RateApproximately 10 mS
Display Duty CycleDisplay Time, AVERAGE, PEAK HOLD - 75%

Display Time, PEAK - 100%
Power Supply Input Range117/237 VAC RMS, -20% to +10%, 50-60 Hz
Calibration ControlsNone Needed
User ControlsLeft/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 PortDB-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)
WeightNot Specified by Manufacturer
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