8.3.2 Gain / Phase
The Gain / Phase measurement mode is designed to measure the transfer function of a DUT using the
external reference connection. This means that both Channel 1 and Channel 2 are active.
The Gain Measurement
Bode 100 measures
Gain therefore equals the transfer function of a 2-port DUT if Channel 1 is connected to the DUT input
port and Channel 2 is connected to the DUT output port. The inputs Channel 1 and Channel 2 are set
to 1 MΩ by default.
Details on the gain measurement can be found in 8.1 Gain measurement introduction on page 37.
Calibration
The Gain / Phase measurement mode does not require calibration to perform a measurement.
However, to remove the influence of probes and cables Gain (Thru) calibration is recommended. For
more details regarding the Gain calibration please refer to 10 Calibration / Correction on page 85.
Typical applications
Typical applications for the Gain / Phase measurement mode are:
• Measuring the transfer function of filters or other circuits.
• Measuring in-circuit transfer functions using high-impedance probes.
• Measuring the transfer function of amplifiers etc.
• Measuring loop stability of power supplies.
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OMICRON Lab
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