DS4201

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102099

APPENDIX D: PARAMETER DEFINITIONS

SIGNAL-TO-NOISE RATIO: The ratio of the rms output level with a 1 KHz F.S. input to the rms

output level with a zero level input. Measured A–weighted over 20 – 20 KHz with 0V applied to the MIC

and AUX inputs. All mixer control settings at 0 dB.

TOTAL HARMONIC DISTORTION + NOISE: The in–band harmonic distortion and noise response

to a 1 KHz F.S. input. Measured by attenuating the 1 KHz F.S. fundamental with a narrow–band notch

filter, then measuring the rms value of remaining harmonic and noise components over the 20 – 20 KHz

bandwidth. All mixer control settings at 0 Db

.

DYNAMIC RANGE: The difference between the highest amplitude signal which the device can linearly

handle and the device active noise level. Measured by adding 60 dB to the device rms response to a 1KHz

input signal 60 dB below F.S. Measured A–Weighted over 20–20 KHz bandwidth by attenuating the

fundamental frequency with a narrow– band notch filter then measuring the remaining in–band signal

level. All mixer control settings at 0 dB.

FREQUENCY RESPONSE: The amplitude response variation relative the amplitude response at 1 kHz.

Measured over a bandwidth of 20 Hz to 0.4x Fs, where Fs is the DAC sampling frequency. All mixer

control settings at 0 dB.

CROSSTALK BETWEEN INPUT CHANNELS

level applied to the input under test and a 1 KHz F.S. signal applied to all the other input channels.

Measured over a 20 – 20 KHz bandwidth. All mixer control settings at 0 dB.

INTERCHANNEL GAIN MISMATCH: The gain difference between left and right channels.

Measured from the difference between the two 20 – 20 KHz band–limited rms outputs with a 1 KHz F.S.

signal at both inputs. All mixer control settings at 0 dB.

GAIN ERROR: For each channel, the difference between the expected output and actual output for a 1

KHz input. Measured over the complete mixer control range and a 20 – 20 KHz bandwidth.

GAIN DRIFT: The change in gain value with temperature.

OFFSET ERROR: The difference between the output and the internal reference with zero level inputs.

All mixer control settings at 0 dB.