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User Manual for Dorrough 40-P Stereo Mono Balance Meter Click to enlarge the picture
Contents of the user manual for the Dorrough 40-P Stereo Mono Balance Meter
- Product category: Metering Dorrough
- Brand: Dorrough
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Dorrough Metering
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User manual for the Dorrough 40-P Stereo Mono Balance Meter contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Dorrough product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Dorrough user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Dorrough product will considerably shorten its lifespan!
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Product description 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.
In the Box Dorrough 40-P Stereo/Mono Balance Meter 2-Year Warranty Table of Contents
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Technical parametersDorrough 40P 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, +/- .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 | Not Applicable | | Peak Decay Period | Not Applicable | | 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 |
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