4200-900-01 Rev. K / February 2017
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Model 4200-SCS User’s Manual
Section 1: Getting Started
Segment ARB waveform
Each channel of a pulse card can be configured to output its own unique Segment ARB
®
waveform. A Segment ARB waveform is composed of user-defined line segments (up to 1024 for
the 4205-PG2 or 2048 for the 4220-PGU and 4225-PMU). Each segment can have a unique time
interval, start value, stop value, output trigger level (TTL high or low) and output relay state (open
or closed).
shows an example of a Segment ARB waveform that contains seven segments. It also
shows the programmed trigger levels and open/closed states for the output relay.
Figure 1-21
Segment ARB waveform example
Start, stop, and time restrictions:
• The start level of the first segment and the stop level of the last segment must be the same.
, segment 1 start and segment 7 stop are both set for 0.0 V.
• The stop level for a segment must be the same as the start level for the next segment. In
, the stop level for Segment 1 is 1.0 V, as is the start level for Segment 2 (no
discontinuities are allowed).
• The minimum time per segment is 20 ns, with increments of 10 ns.
Trigger levels
: The segment trigger levels are available at the TRIGGER OUT connector. When
set high (1), a TTL high level will be present at TRIGGER OUT during that time
interval. When set low (0), the trigger goes low for that segment. In
trigger is set high for the first three segments, and low for the rest of the segments.
NOTE
If both channels of a pulse card are being used, the segment trigger levels for
CHANNEL 1 will be seen at the
TRIGGER OUT
connector. The trigger levels for
CHANNEL 2 are ignored.
1
1
1
1
1
1
0
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