Stanford Research Systems SR785, Operating Manual And Programming Reference

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1-28 Capture
SR785 Dynamic Signal Analyzer
Press [0] and [Enter]. Decrease the Waterfall allocation to the minimum
allowed. Note that the analyzer displays an
allocation of 4 blocks. The analyzer always
maintains a minimum allocation for each function
that uses memory..
Press <Capture Memory> Select the Capture allocation.
Press [9] [0] [0] and [Enter]. Increase it to 900 blocks. (1,843,200 points).
Press <Confirm Allocation> and <Return>. You must confirm the new allocation. Changing the
memory allocation destroys previously stored data
in the memory.
5. Press <Capture Channels>
Select which inputs to capture.
Use the knob to select (Ch1) and press [Enter]. Choose Ch1 only. In this case, the entire capture
buffer is available for Ch1. When both channels are
captured, half of the buffer is available for each
channel.
Press <Capture Length> Increase the capture length.
Press [1] [8] [0] [0] and [Enter]. All of the capture allocation (900 blocks) is
available. Each block stores 2 kPoints for a total of
1800 kPoints.
6. Press [Start Capture]
Start the capture. The buffer will take 7.03 seconds
to fill. Since the Capture Mode is 1-Shot, the
capture stops once the buffer is full. During this
time, Capture indicator is highlighted and the
Capture Progress indicator shows how much of the
buffer has been filled (up to 100%).
After capture is complete, the Capture indicator
shows ‘Cap Data’ indicating that the Capture buffer
contains data.
Press [Active Display] Make DisplayB (bottom) the active display.
Press [Display Setup] Select the Display Setup menu.
Press <Measurement> Change the measurement of DisplayB.
Use the knob to select (Capture1) and press
[Enter]. Choose Capture1 to show the contents of the Ch1
Capture buffer.