Outline of product

Audio loudness meter, model AM-3807 is high-functional audio loudness measurement monitor to support SDI embedded audio and AES audio. Loudness measurement is compliant to loudness algorism of ITU-R BS.1770 (ARIB TR-B32). Measurement mode covers Integrated(average), Short term and Momentary with continuous measurement up to 6 hours. Display layout has History, Loudness level bar and Picture. You can select TC(Time Code) or audio level for auto measurement trigger as well as START/PAUSE button on the front panel. Start and pause trigger can be set respectively such that TC for start and audio level for pause trigger. Audio level trigger consists of not only level but period for flexible application. These functions make AM-3807 possible to have a lot of unique and useful features such as overwrite measurement chasing TC.
Audio loudness meter, AM-3807

Features

 

Equipped 7inch LCD and various display layout

 

AM-3807 has three display layout modes of History, Loudness level bar and Picture. Each mode has graphics and various number values. Loudness of Integrated, Momentary/Short term and True peak are diplayed. Display color is green when measurement result is within target level. Red display beyond target level and blue display below target level. It is quite simple.

History

If you want to see time-elapsed data, History mode shows it to you. Screen is displaying max./min. values of loudness level of Integrated, Momentary/Short term and true peak on TC based horizontal line. Use position and zoom adjustment so you can see your specific position with wider image.

Loudness level bar

Momentary and Short term measurement result is displayed by Loudness level bar mode. If audio mode is 2ES, AM-3807 shows it on the screen simultaneously. Level bar is refreshed by 25msec step.

Surround Lissajous display

Surround display makes it possible to see adjacent channel correlation, each channel level including LFE, and sound expanse.
Detecting audio mode, display changes to Lissajous on stereo mode. At 5.1ch or 5.1ch+S mode, internal down mixed Lissajous can be displayed.

Surround display


Lissajous display

Surround, Lissajous and Down Mix

 

 

Overwrite loudness measurement

 

When measurement result fails over target level, you do not need to measure whole period again. After the failed period was modified, all you have to do is to play back that period only. AM-3807 measures that period by TC, overwrite on the previously measured data and provide loudness value for whole period.

1. Detect failed period
2. Modify source audio level.
3. Set AM-3807 start TC and pause TC of failed period
4. Play back failed period of modified audio source and AM-3807 starts and stop measurement by previously set TC.
5. AM-3807 overwrites on the previously measured data and provide loudness value for whole period.

 

Supporting various audio mode

 

AM-3807 supports various audio mode such as Mono, 2Mono, ST, 2ST, 5.1 and 5.1+S. Each audio channel is assignable respectively per audio mode. 5.1 downmix can be assigned to ST. ES mode is supported as well.
ES1 display

ES2 display

 

DVI-D output

 

When you feel screen size of AM-3807 is not wide enough for your work, you can connect DVI-D output to external monitor so you can see it on wider screen by 800x480 resolution.

 

USB port

 

AM-3807 equips two USB port. One for USB memory to save and load loudness log data, another for USB mouse to control part of AM-3807 such as zoom and cursor move. You can enjoy it like PC.

 

HD/SD-SDI and AES/EBU input

 

AM-3807 supports HD/SD-SDI(compliant to SMPTE292M/259M) embedded audio and AES/EBU. Connector of AES/EBU is D-sub 25pin TASCAM compatible. Throughout of SDI and AES/EBU are equipped as well.

Specifications

Input

SDI HD-SDI compliant to SMPTE 292M, Embedded audio compliant to SMPTE 299M
SD-SDI compliant to SMPTE 259M, Embedded audio compliant to SMPTE 272M
Frame rate auto sense (60.00/59.94Hz etc), input format auto sense, cable length available up to 100m
Input impedance: 75Ω, connector: BNC

AES/EBU Balanced AES3 input, 48kHz sampling, input impedance:110Ω,
connector: D-sub25pin (female), inch screw type
TASCAM compatible pin assignment

TC Balanced input
10kΩ termination
connector: Cannon 3pin (male)

Output

SDI HD-SDI compliant to SMPTE 292M, Embedded audio compliant to SMPTE 299M
SD-SDI compliant to SMPTE 259M, Embedded audio compliant to SMPTE 272M
Cable length available up to 100m, SDI output is re-clocked of input
Output impedance: 75Ω, connector: BNC

AES/EBU Balanced AES3 input, 48kHz sampling, input impedance:110Ω,
connector: D-sub25pin (female), inch screw type
TASCAM compatible pin assignment

General

Operating temperature range 5 to 35℃
Static temperature range -10 to 60℃

Operating humidity range 30 to 80%RH (ambient temperature 5 to 35℃ and no condensation)
Static humidity range 10 to 90%RH (ambient temperature -10 to 60℃ and no condensation)

Dimensions

LCD life time 50,000 hours (LCD backlight brightness half life*)
* LCD backlight half life time is expected value of LCD manufacturer, thus not guaranteed.

Weight Approx. 1.8Kg (main unit)
Supply voltage DC10 to 18V
Power consumption MAX 18W
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