TRS In 1-4
As above, but:
• Signal to Noise ratio (SNR): 115 dB RMS unweighted, 118 dBA
• TRS jack, balanced
• Gain range: 42 dB, 1 dB steps
• Maximum input level, Gain 8 dB: +20 dBu
• Maximum input level, Gain 50 dB: -22 dBu
• Switchable high impedance (unbalanced TS): 1 MOhm
3.7. Frequency and Impulse Response
The A/D converters of the AVB Tool are optimized for extremely low latencies (Short Delay IIR filters). At
single speed, the conversion prioritizes frequency response to ensure linear conversion across the entire
frequency band.
At double and quad speed (88.2 kHz and higher), the conversion has been optimized to deliver a near-
perfect impulse response. This is achieved by allowing a lower cutoff frequency and a slower roll-off of
the anti-aliasing filter. It shifts from around 44 kHz to 25 kHz at 96 kHz (84 kHz to 32 kHz at 192 kHz)
and attenuates higher signals less steeply. The resulting impulse response shows significantly less
ringing artifacts than steep filters at at a higher cutoff frequency. Since even the lower cutoff frequencies
are located well above the audible range, the advantage of the improved impulse response outweighs the
benefit of a higher cutoff frequency.
If the AVB Tool is used for scientific research (ultrasonic signals) with measurement
microphones that maintain a linear frequency response above 25 kHz, please contact your
support for a solution.
3.8. Analog Input LEDs with Integrated Metering
Each analog input is accompanied by an LED. Shades of green, yellow, and
red represent the current level for each channel. Additionally, each LED shows
the active state of phantom power (yellow), active TRS input (white), active
High-Z impedance on TS (blue), and participation in a gain group (green) while
pressing the corresponding quick select buttons.
3.9. Meter Backlight Color and Intensity Reference
The following table describes the signal level represented by the backlight color. Each value corresponds
to full scale, which is equivalent to the reference level of the corresponding input.
Color
Color name
dBFS
Green
-54 (barely visible in low light)
-40 (barely visible in daylight)
-20 (bright green)
Yellow
-5 (strong yellow)
RME AVB Tool User’s Guide
3.7. Frequency and Impulse Response |
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Summary of Contents for AVB Tool
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