SFRA45 User Manual
12-1
12
Oscilloscope Mode.
The oscilloscope is can be either single or dual trace and
has a sample rate of 5Msamples/s and a time base sweep
of 5µs/div to 5s/div, this provides the user with a
convenient tool for displaying and analyzing input
waveforms.
The oscilloscope has six functions available: ‘
timebase
’,
‘
trigger level’
, ‘
trigger mode’
, ‘
trigger polarity’
, ‘
pretrigger
’
and ‘
traces
’.
Timebase -
Sets the sweep rate of the oscilloscope, the
setting can be adjusted by following the “Keypad
Operation” instructions in section 4.1.
Trigger level –
Sets the minimum voltage required to
start a sweep and can be adjusted by following the
“Keypad Operation” instructions in section 4.1.
Trigger mode –
Has three options: ‘
auto
’, ‘
normal
’ and
‘
single shot’
.
‘Auto’ puts the oscilloscope in the
auto run
mode where
the trace is synchronized to the trigger event. However, in
this mode it draws a trace even if no trigger event is seen.
‘Normal’: Sets the trace to respond to each trigger event.
If there are no trigger events the display is not updated
until a trigger event occurs.
‘Single shot’: Sets the trace to respond only to the first
trigger event captured. By pressing the “Home/Esc” key
re-arms the trigger circuit for the next event capture.
Trigger Polarity -
Has two options: ‘
rising edge’
and
‘
falling edge’
. Selecting ‘rising edge’ sets the oscilloscope
to start the sweep when the trigger voltage goes positive.
