Stanford Research Systems SR780, Operating Manual And Programming Reference

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4-64 Arbitrary Source Menu
SR780 Network Signal Analyzer
Arb. Source Start
Select the Arbitrary Source Start position within the selected source buffer (either
Arbitrary Waveform memory or Capture buffer. The start position is specified as a bin
number or individual point position. During Arbitrary playback, the points are separated
by a time equal to 1/Play Rate. The corresponding start time relative to the start of source
buffer is displayed as well.
Command: ASTR (?) {i}
Arb. Source Length
Select the \Arbitrary Source Length in 2 kPoint (2048 points) increments. The Arbitrary
Source Length (in points) plus the Arbitrary Source Start cannot exceed the length of the
Arbitrary source buffer, either the Arbitrary waveform memory or the Capture Length.
The corresponding source time length is displayed as well.
Command: ALEN (?) {i}
Set Left Edge
The Arbitrary Source playback must be from a Capture Buffer and the Measurement of
the active display must be the Capture Buffer for this key to be active.
Choose the correct Capture Buffer as the Measurement and use Zoom and Pan to show
the region of interest. Press <Set Left Edge> to set the Arbitrary Source Start to the
marker position. The Arbitrary Source Length is not changed.
If the requested Source Start plus the Source Length (in points) exceeds the Capture
Length of the buffer, the Source Length is reduced.
Set Right Edge
The Arbitrary Source playback must be from a Capture Buffer and the Measurement of
the active display must be the Capture Buffer for this key to be active.
Choose the correct Capture Buffer as the Measurement and use Zoom and Pan to show
the region of interest. Press <Set Right Edge> to set the Arbitrary Source Length to the
marker position minus the Source Start. The Source Start is not changed.
The Source Length is always set to a 2 kPoint (2048 points) increment.
If the marker position is to the left of the Source Start, then the Source Length is set to
the minimum (2 kPts).