Arbiter Systems 931A, Руководство по эксплуатации

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3.5.4.3 Performing the Measurement
Press the PHASE/FREQUENCY key to display the measured frequency
and produce a display similar to the one shown below:
The large number in the middle of the display indicates the frequency
of the signal on Channel 1. The indication for phase angle may consist of
dashes because only one signal is being input or the signal level is too low,
making phase comparison impossible.
The display shows dashes when the signal at Channel 1 is below a value
that can be accurately measured, indicating that the signal is insufficient.
3.5.5 Harmonic Measurement
The Model 931A can measure harmonic content up to the 50th harmonic
for fundamental signals of 50 or 60 Hz. Use either Channel 1 or 2 to
measure harmonics, but on only one channel at a time.
3.5.5.1 Input Connections
Make connections for harmonic measurement in the same manner as for AC
voltage or current magnitude measurements. Since the Model 931A derives
the harmonic value from the same inputs, simply press the HARMONICS
key to view them. See Section 3.2.2 (AC voltages) and Section 3.2.3 (AC
currents) for descriptions of AC Input connections.
3.5.5.2 Configuring the Channel(s)
To configure the Model 931A for harmonic measurement, press either the
CHANNEL 1 SELECT or CHANNEL 2 SELECT key and use the cursor
keys to select the measurement signal from the channel menu. The Model
931A measures harmonics on signals processed by either channel.
3.5.5.3 Performing the Measurement
Press the harmonics key to display harmonics. By default, Channel
1 initially displays harmonics. To switch between harmonics on either
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