The center of the display shows the amplitude of the selected channel.
Pressing the upper center soft key will select among the available
units. The usual absolute and relative amplitude units are available.
The phase measurement is always the phase of the selected channel,
using another channel as a reference. Pressing the INPUT A button
will cycle through the following combinations:
.
A-B – This option will measure the phase of input A with input
B as a reference.
.
A-G (analog only) – This option will measure the phase of input
A with the channel A gen-mon path as a reference. This is used
to measure phase shift through a device (input to output).
.
GA (analog only) – This option will measure the phase of
gen-mon channel A with gen-mon channel B as a reference.
Pressing the INPUT B button will cycle through the following
combinations:
.
B-A – This option will measure the phase of input B with input
A as a reference.
.
B-G (analog only) - This option will measure the phase of input
B with the channel B gen-mon path as a reference. This is used
to measure phase shift through a device (input to output).
.
GB (analog only) – This option will measure the phase of
gen-mon channel B with gen-mon channel A as a reference.
The gen-mon paths are only available in analog modes. This is
because both digital channels travel along the same path and
therefore if one channel of digital gen-mon is enabled the other will be
also. The phase reading would always read zero because the digital
generator cannot generate out-of-phase sinewaves.
The lower left soft key controls the range over which the phase
measurement is displayed. The allowable ranges are +180 to –180
degrees, -270 to +90 degrees, and –90 to +270 degrees. The latter
two ranges should generally be used for polarity checks, where the
reading will either be very close to 0 or very close to 180 degrees. If
the +180 to -180 degree range is used for these measurements,
readings near zero could read on either end of the range.
4 Functions
Phase Function Descriptions
4-24 ATS-1 Dual Domain User's Manual
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