Triggering
222PS Operator Manual
3Ć67
Motor Trigger Function
The motor trigger function responds to pulse bursts such as those
produced by uninterruptable power supplies (UPS) and variableĆfreĆ
quency motor drives. This function triggers on the first pulse that
occurs in each burst if the interval between the bursts is at least
2.5 ms. If the interval between bursts is less than 2.5 ms, the motor
trigger function does not operate.
The motor trigger function also reduces noise on 50/60 Hz line signals
resulting in cleaner triggering in noisy line environments.
The trigger source, slope, level, and mode functions still operate
normally when you select MOTOR TRIG. Note, however, that even
though the trigger source selections include EXT, motor trigger does
not work with signals applied to the EXT TRIG INPUT.
Triggering on Motor Drive Signals
To trigger on the variableĆfrequency signal that drives a motor, use the
following procedure:
ĂĂStep 1:ă
Toggle MOTOR TRIG on and set the trigger level midway
between the top and bottom of the desired pulse group.
ĂĂStep 2:ă
Set the trigger slope to
+
for pulse groups separated by
a low" region (Figure 3Ć34). Set the trigger slope to
-
if the
region separating the pulse groups is high" (Figure 3Ć35).
ĂĂStep 3:ă
Use normal trigger mode if the oscilloscope has trouble
triggering on a slow motor speed.
Triggering on 50/60 Hz Line Signals
To trigger on 50/60 Hz line signals, toggle MOTOR TRIG on and set
the other trigger controls to trigger either on the rising edge or the
falling edge of the waveform. The motor trigger function suppresses
stray trigger signals that result from line transients and noise.
Triggering
222PS Operator Manual
3Ć67
Motor Trigger Function
The motor trigger function responds to pulse bursts such as those
produced by uninterruptable power supplies (UPS) and variableĆfreĆ
quency motor drives. This function triggers on the first pulse that
occurs in each burst if the interval between the bursts is at least
2.5 ms. If the interval between bursts is less than 2.5 ms, the motor
trigger function does not operate.
The motor trigger function also reduces noise on 50/60 Hz line signals
resulting in cleaner triggering in noisy line environments.
The trigger source, slope, level, and mode functions still operate
normally when you select MOTOR TRIG. Note, however, that even
though the trigger source selections include EXT, motor trigger does
not work with signals applied to the EXT TRIG INPUT.
Triggering on Motor Drive Signals
To trigger on the variableĆfrequency signal that drives a motor, use the
following procedure:
ĂĂStep 1:ă
Toggle MOTOR TRIG on and set the trigger level midway
between the top and bottom of the desired pulse group.
ĂĂStep 2:ă
Set the trigger slope to
+
for pulse groups separated by
a low" region (Figure 3Ć34). Set the trigger slope to
-
if the
region separating the pulse groups is high" (Figure 3Ć35).
ĂĂStep 3:ă
Use normal trigger mode if the oscilloscope has trouble
triggering on a slow motor speed.
Triggering on 50/60 Hz Line Signals
To trigger on 50/60 Hz line signals, toggle MOTOR TRIG on and set
the other trigger controls to trigger either on the rising edge or the
falling edge of the waveform. The motor trigger function suppresses
stray trigger signals that result from line transients and noise.
Summary of Contents for 222PS
Page 6: ......
Page 18: ...Contents xii Contents xii ...
Page 21: ...Overview Overview ...
Page 22: ......
Page 27: ...At a Glance At a Glance ...
Page 28: ......
Page 45: ...In Detail In Detail ...
Page 46: ......
Page 50: ...Acquisition Modes In Detail 3Ć4 Acquisition Modes In Detail 3Ć4 ...
Page 54: ...Auto Setup In Detail 3Ć8 Auto Setup In Detail 3Ć8 ...
Page 60: ...Calibration In Detail 3Ć14 Calibration In Detail 3Ć14 ...
Page 66: ...Channels In Detail 3Ć20 Channels In Detail 3Ć20 ...
Page 70: ...The Display In Detail 3Ć24 The Display In Detail 3Ć24 ...
Page 76: ...Horizontal Operation In Detail 3Ć30 Horizontal Operation In Detail 3Ć30 ...
Page 96: ...Probes In Detail 3Ć50 Probes In Detail 3Ć50 ...
Page 106: ...Saving and Recalling Data In Detail 3Ć60 Saving and Recalling Data In Detail 3Ć60 ...
Page 108: ...Store Mode In Detail 3Ć62 Store Mode In Detail 3Ć62 ...
Page 124: ...Vertical Operation In Detail 3Ć78 Vertical Operation In Detail 3Ć78 ...
Page 127: ...Appendices Appendices ...
Page 128: ......
Page 170: ...Appendix C Quick Checks Appendices AĆ42 Appendix C Quick Checks Appendices AĆ42 ...
Page 210: ...Appendix F Accessories Appendices AĆ82 Appendix F Accessories Appendices AĆ82 ...
Page 211: ...Glossary Index Glossary Index ...
Page 212: ......
Page 230: ...Index Index IĆ10 Index Index IĆ10 ...
Page 231: ......
Page 232: ......