Lavry AD122 96-MKIII 声卡
更新时间:2020-08-24 14:49:15 信息编号:4412632 发布者IP:124.126.31.89 浏览:209次- 供应商
- 北京麦田中旺数码科技有限公司 商铺
- 认证
- 资质核验:已通过营业执照认证入驻顺企:第9年主体名称:北京麦田中旺数码科技有限公司组织机构代码:110105011639690
- 报价
- 人民币¥1.00元每1
- 品牌
- Lavry AD122 96-MKIII
- 型号
- Lavry AD122 96-MKIII
- 1
- 1
- 关键词
- 声卡,音频接口
- 所在地
- 北京市朝阳区百子湾路16号百子园5号楼A单元707室
- 手机号
- 18600607968
- 项目经理
- 刘先生 请说明来自顺企网,优惠更多
产品详细介绍
TEL:186-006-07968 项目经理:博乐
Lavry AD122 96-MKIII
The Lavry AD122-96MKIII converts analog signals to a true 24
bit digital audio data stream. Consistently used for many of
today's top recordings, the AD122-96MKIII features -127dB dynamic
range (unweighted), providing optimum musical results.
Features:
•96kHz, 88.2kHz, 48kHz and 44.1kHz conversion fre
•Une detail and performance
•True -127dB noise floor
•0.00005% total harmonic distortion + noise
•Conversion to 24 bits
•Built-in acoustic bit correction re-dithering to 16-20 bit
formats
•Switchable digital soft-knee limiter, +3 or +6dB gain
•Precision reference meter bridge
•Fully programmable digital test tones for system alignment
•AES and word clock external synchronization 40-51kHz, 88.2kHz,
96kHz
•DC removal
•Absolute polarity inversion
• Multi-converter synchronization
Achieving 20 or more bits of resolution places a heavy demand on the linearity and noise of analog signals prior to the A/D conversion.
Linearity
Linearity problems (typically associated with larger signals)
should be avoided to prevent overall signal distortions. Proper
circuit design places non linear devices inside a negative feedback
path, thus allowing the transfer function to depend on a few linear
component (such as resistor ratio). Closer examination reveals that
the effectiveness of negative feedback is limited by the open loop
gain of the amplifier (the available gain prior to the feedback
action). Constructing a 10dB gain stage out of, say, a 50dB open
loop amplifier provides 40dB of feedback; thus circuit
nonlinearities are corrected for by a factor of 100. A 1%
nonlinearity reduces to a .01% level. The same stage, when set to a
gain of 20dB, yields only 50-20=30dB of 'linearizing power'; thus
the same 1% circuit nonlinearity is corrected to 1/31.6 = .03%. The
'obvious' solution of increasing circuit open loop gain is riddled
with problems ranging from impulse response settling time to loss
of bandwidth.
Noise
The (A/D conversion) of analog noise causes loss
of fine signal detail. The noise introduces time varying
signal dependent distortions. Such sample by sample deviation can
not be compared to the seemingly 'constant' analog background
noise. The interaction between the noise and the
process effects the sonic detail at much higher amplitude than the
noise level itself. The source material may have its own noise
level, but the A/D manufacturer is in no position to decide which
part of the material is signal and which part is noise. (Is it
undesirable noise or is it the intentional recording of the wind
blowing through the trees?) Thus, any signal must be reproduced
accurately. All we can do, and all we should do amounts to avoiding
additional A/D noise. A/D noise consists of two parts: analog noise
(prior to ), and noise. The
noise level is 'fixed' by the converter itself. Model AD122-96
MKIII noise relative full scale is about 122dBFS.
Keeping complete system noise level at 122dBFS requires careful
treatment of the analog path. Each circuit component (especially
resistors and semiconductors) generates its own noise. The complex
electron motion within the various materials adds up to a
cumulative noise. Intentional amplification of signals yields
undesirable amplification of noise. Once again, each dB of added
gain takes away a dB from the available dynamic range.
AD122-96 MKIII Input Range
You may suspect by now that our aim is to provide you with an
A/D converter and leave the problem of providing a 'hot' signal at
the hands of microphone and mic- preamplifier manufacturers. Like
many A/D's, Model AD122-96 MKIII provides limited gain
(0-11.5dB).
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