Audio Analyzer Measurement Functions 4
Keysight U8903B User’s Guide 247
Range
Press the Range softkey to select the input voltage range. This setting is only available when the auto range is disabled.
– 140 V
– 100 V
–32 V
–10 V
–3.2 V
–1 V
– 320 mV
Band width
Press the Band width softkey to select the input bandwidth value. This setting is only available with Option N3431A. Refer
to “U8903B Options” on page 37 for more information.
– 90 kHz
(This is the default setting with sampling rate of 192 kHz)
– 1.5 MHz
Coupling
Press the Coupling softkey to select the input coupling type.
–DC
DC coupling allows both the AC and DC analog input signals to pass through to the analog analyzer and to be measured
down to 0 Hz. This setting should be selected when making DC voltage measurements.
–AC
AC coupling blocks the DC component of the analog input signal by switching a capacitor in series to the input path.
This setting should be selected when you need to measure only the AC component of a signal. For example, use AC
coupling when you are making an rms or peak-to-peak voltage measurement.
Ext. Gain
Press the Ext. Gain softkey to set the input external gain value.
The external gain can be set in the range of –60 dB to 60 dB. The default external gain is 0 dB. External gain is used to
correct the effects of any external gain or loss that may be part of a measurement setup.
For example, if an amplifier is part of a measurement setup, the external gain value is used to remove the effects of its gain.
However, if an external attenuator is used in a high voltage measurement, the external gain value is used to correct the
loss. The external gain value can be set in unit dB or x.
Table 4-31 Analog Analyzer > Input Config menu description (continued)
Menu Description
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