Promax OD-405, Manual, Page: 184 / 218

USER’S MANUAL. OD-405/410B/411/415
11-2011 Page 68
5.6.9 Probe attenuation level and type (OD-411/OD-415)
On the OD-411/OD-415 models, the probe can be set to either voltage
or current. A signal probe has an attenuation switch to lower the original DUT
signal level to the oscilloscope input range, if necessary. The probe
attenuation selection adjusts the vertical scale so that the voltage or current
level on the display reflects the real value, not the attenuated level.
Procedure
1. Press the CH1 or CH2 key.
2. Press F4 repeatedly to select voltage or current probes.
3. Use the variable knob to edit the voltage or current attenuation.
4. The voltage/current scale in the channel indicator changes
accordingly. There is no change in the waveform shape.
Range 0.1X~2000X (1-2-5 steps)
Note: The attenuation factor adds no influence on the real signal; it only
changes the voltage/current scale on the display.
5.7 Trigger
The trigger function configures the conditions by which the oscilloscope
captures the incoming signals.
5.7.1 Trigger type
Edge Triggers when the signals crosses an amplitude threshold in
either positive or negative slope.
Video Extracts a sync pulse from a video format signal and
triggers on a specific line or field.
Pulse Triggers when the pulse width of the signal matches the
trigger settings.