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User Manual for Dorrough 10-C Analog Loudness Meter 20dB Click to enlarge the picture
Contents of the user manual for the Dorrough 10-C Analog Loudness Meter 20dB
- 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 10-C Analog Loudness Meter 20dB 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 10-C Analog Loudness Meter +20dB is a smaller single-channel version of Dorrough's standard 40-C loudness monitor. The meter scale allows for 20dB of headroom in 1dB steps. The headroom scale is identical to the AES/EBU Digital Standard. This 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.It has Phoenix (euroblock) connectors. Rack mounting is required. - Actual Energy Display
- Dorrough Loudness Meters display actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. This feature allows all program material to be adjusted for equal perceived loudness while protecting the peak of the waveform.
- Peak and Average Level Metering
- The 10-C, like all Dorrough loudness meters, simultaneously displays peak and average, in this model up to +20dB. 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 can cause 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 10-C Analog Loudness Meter +20dB 2-Year Warranty Table of Contents
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Technical parametersDorrough 10-C 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 | 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) | 4.25 x 3.0 x 2.0" (in.)(1.7 x 1.2 x 0.8cm) | | Weight | Not Specified by Manufacturer |
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