Tektronix TBS2072, Руководство пользователя

Страница: 70 / 142

Analyzing a waveform
Automatic measurement descriptions
The following tables list the automatic measurements, grouped as shown on the measurements menu. Measurement
descriptions can also be shown on the oscilloscope by enabling
Help Everywhere ( Function > Help Everywhere ). (See
page 21, Getting on-screen help for settings: Help Everywhere .)
Frequency measurement descriptions
Frequency measurements
Measurement Description
Frequency The fi rst cycle in a waveform or gated region. Frequency is the reciprocal of the period; it
is measured in hertz (Hz) where one Hz is one cycle per second.
+Pulses The number of positive pulses that rise above the mid reference crossing in the
waveform or gated region.
–Pulses The number of negative pulses that fall below the mid reference crossing in the waveform
or gated region.
+Edges
The number of positive transitions from the low reference value to the high reference
value in the waveform or gated region.
–Edges The number of negative transitions from the high reference value to the low reference
value in the waveform or gated region.
Time measurement descriptions
Time measurements
Measurement Description
Period The time required to complete the fi rst cycle in a waveform or gated region. Period is
the reciprocal of frequency and is measured in seconds.
Rise Time The time required for the leading edge of the fi rst pulse in the waveform or gated region
to rise from the low reference value to the high reference value of the fi nal value.
52 TBS2000 Series User Manual