User manual

Reference
Use the Normal m
ode when you want to see only valid triggered waveforms.
When you use this mode, the oscilloscope does not display a waveform until
after the first trigger.
To perform a Single Sequence acquisition, push the Single button.
Source Options.
Source option Details
CH1, CH2, CH3
1
, CH4
1
Triggers on a channel whether or not the waveform is
displayed
Ext Does not display the trigger signal; the Ext option uses the
signal co
nnected to the Ext Trig front-panel BNC and allows
a trigger level range of +1.6 V to -1.6 V
Ext/5 Same as Ext option, but attenuates the signal by a factor of
five, and allows a trigger level range of +8 V to -8 V; this
extends
the trigger level range
AC Line
2
Uses a si
gnal derived from the power line as the trigger source;
trigger coupling is set to DC and the trigger level to 0 volts.
You can use the AC Line when you need to analyze signals
relate
d to the frequency of the power line, such as lighting
equipment and power supply devices; the oscilloscope
automatically generates the trigger, sets the Trigger Coupling
to DC,
and sets the Trigger Level to zero volts.
1
Available only on a 4-channel oscilloscope.
2
Available only when you select the E dge trigger type.
NOTE. To view an Ext, Ext/5, or AC Line trigger signal, push and hold down
the Trig View button.
Coupling. Coupling allows you to filter the trigger signal used to trigger an
acquisition.
Option Details
DC Passes all components of the signal
Noise Reject Adds hysteresis to the trigger circuitry; this reduces sensitivity
which reduces the chance of falsely triggering on noise
HF Reject
Attenuates the high-frequency components above 80 kHz
LF Reject
Blocks the D C component and attenuates the low-frequency
components below 300 kHz
AC Blocks DC components and attenuates signals below 10 Hz
NOTE. Trigger coupling a ffects only the signal passed to the trigger system. It
does not affect the bandwidth or coupling of the signal displayed on the screen.
96 TBS1000 Series Oscilloscopes User Manual