Agilent Technologies N8201A Service Manual download pdf (Page 86)

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86 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz

3 Auto Couple

ADC Dither

Auto Turns the ADC dither to automatic. It then chooses on or off according to which is

most likely to be the best selection, based on the other N8201A settings such as span,

resolution BW and sweep type (FFT or swept).

On When ADC Dither is On, the linearity of low-level signals is improved. However, the

ADC dynamic range is reduced to make room for the dither. As a result, the noise floor of

the N8201A is somewhat compromised. So making measurements with ADC dither on

gives you better amplitude linearity, but turning ADC dither off gives you a lower noise floor

(better sensitivity).

Off When ADC Dither is Off, the instrument noise floor is improved. If ADC dither is on the

ADC dynamic range is reduced to make room for the dither. As a result, the noise floor of the

N8201A is somewhat compromised. So making measurements with ADC dither on gives you

improved amplitude linearity, but turning ADC dither off gives you a lower noise floor (better

sensitivity).

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Agilent Technologies N8201A Service Manual Page 86

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