User manual Dorrough 280-AE - Analog Loudness Meter 280-AE
Operating instructions and pdf manual for use - Dorrough 280-AE - Analog Loudness Meter 280-AE User manual, User manual Dorrough 280-AE - Analog Loudness Meter 280-AE, Dorrough, 280-AE, Analog, Loudness, Meter, 280-AE, Video
User manual for Dorrough 280-AE - Analog Loudness Meter 280-AE
Manufacturer: Dorrough
Basic description and contents of package
Product classification: Pro Audio - General Accessories - Metering
Safety instructions
Startup and operation of the metering
Tips for setting up your Dorrough
Settings and expert assistance
Contact Dorrough service
Troubleshooting
Warranty information
Price: 815 USD
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User manual for the Dorrough 280-AE - Analog Loudness Meter 280-AE
The user manual for the Dorrough 280-AE - Analog Loudness Meter 280-AE provides
necessary instructions for the proper use of the product Pro Audio - General Accessories - Metering.
The Dorrough 280-AE is a professional analog loudness meter, with a dual-channel, horizontal linear display, designed for modern stereo recording and broadcast requirements. The unit shows both simultaneous average and peak program information, with separate ballistics and lightning-fast response. This meter is equipped with a 40-LED bar graph, allowing for 14dB of headroom in 1dB steps of resolution per LED.
If you own a Dorrough metering and have a user manual in electronic form,
you can upload it to this website using the link on the right side of the screen.
You can upload and download the manual for the Dorrough 280-AE - Analog Loudness Meter 280-AE in the following formats:
*.pdf, *.doc, *.txt, *.jpg - Other formats are unfortunately not supported.
Additional parameters of the Dorrough 280-AE - Analog Loudness Meter 280-AE:
Specifications
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)
The user manual for the Dorrough 280-AE - Analog Loudness Meter 280-AE can be downloaded in .pdf
format if it did not come with your new metering, although the seller is
required to supply one. It is also quite common that customers throw out
the user manual with the box, or put the CD away somewhere and then can’t find it.
That’s why we and other Dorrough users keep a unique electronic library
for Dorrough meterings,
where you can use our link to download the user manual for the Dorrough 280-AE - Analog Loudness Meter 280-AE.
The user manual lists all of the functions of the Dorrough 280-AE - Analog Loudness Meter 280-AE,
all the basic and advanced features and tells you how to use the metering.
The manual also provides troubleshooting for common problems. Even greater
detail is provided by the service manual, which is not typically shipped with the product,
but which can often be downloaded from Dorrough service.
If you want to help expand our database, you can upload a link to this website
to download a user manual or service manual, ideally in .pdf format. These pages
are created by you – users of the Dorrough 280-AE - Analog Loudness Meter 280-AE. User manuals are also
available on the Dorrough website under Pro Audio - General Accessories - Metering.
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