Model 6220/6221 Reference Manual Wave Functions (6221 Only) 7-9
Return to Section 7 topics
Phase marker
The phase marker (Figure 7-3) allows you to set a pulse marker that defines a
specific point of a waveform over a range of 0 to 360°. The phase marker signal is
a 1μs pulse that appears on the selected line of the external trigger connector
(see “External trigger connector,” on page 8-13 for connector designations). You
can also define which trigger output line is used for the phase marker pulse
(default is line 3), but you cannot use the same line used for the external trigger
output (default is 2) or the waveform external trigger input line (default is 0 or dis-
abled). A 0
° marker setting for ramp waveforms corresponds to the minimum out-
put at the start of ramp-up. For sine and square wave, a 0
° marker setting for
square and sine waves is the zero-crossing point.
Figure 7-3
Phase marker
Output
Waveform
High (5V)
Low (0V)
Phase Marker Pulse
Example Shows
180 Degree
Marker Setting
1μs
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