IBM Car Amplifier 7220 Manuel d'utilisateur télécharger pdf (Page 71)

5-31

Chapter 5, FRONT PANEL OPERATION

MAG Volts (or Amps)

Figure 5-35, Magnitude Output in Volts or Amps

Shows the signal magnitude, where magnitude = √((X output)

+ (Y output)

directly in terms of volts or amps (depending on whether voltage or current input

mode is selected). Hence if the sensitivity setting were 100 mV and a 50 mV signal

were applied, regardless of the setting of the instrument’s reference phase, the display

would read 50.00 mV

Noise in Volts or Amps per Root Hertz

Figure 5-36, Noise Output in Volts or Amps per Root Hertz

Shows the noise accompanying the signal, in a noise bandwidth defined by the setting

of the output filter time constant, where it is assumed that the noise is Gaussian. Note

that the noise floor of the instrument is 2 nV and so the output value will always be

greater than this.

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IBM Car Amplifier 7220 Manuel d'utilisateur Page 71