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Keithley 2657A User Manual

Keithley 2657A
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Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012 7-49
Example 1
beeper.beep(0.5, 2400)
delay(0.250)
beeper.beep(0.5, 2400)
Emit a double-beep at 2400 Hz. The sequence is
0.5 s on, 0.25 s off, 0.5 s on.
Example 2
dataqueue.clear()
dataqueue.add(35)
timer.reset()
delay(0.5)
dt = timer.measure.t()
print("Delay time was " .. dt)
print(dataqueue.next())
Clear the data queue, add 35 to it, and then delay
0.5 seconds before reading it.
Output:
Delay time was 0.500099
3.50000e+01
Also see
None
digio.readbit()
This function reads one digital I/O line.
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
data = digio.readbit(N)
data
The state of the I/O line
N
Digital I/O line number to be read (1 to 14)
Details
A returned value of zero (0) indicates that the line is low. A returned value of one (1) indicates that the line is
high.
Example
print(digio.readbit(4))
Assume line 4 is set high, and it is then read.
Output:
1.00000e+00
Also see
digio.readport() (on page 7-50)
digio.writebit()
(on page 7-58)
digio.writeport()
(on page 7-58)
Digital I/O port
(on page 3-80)

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Keithley 2657A Specifications

General IconGeneral
TypeSource Measure Unit (SMU)
Resolution6.5 digits
Current Resolution10 pA
Digital I/OYes
Voltage Resolution100nV
ConnectivityLAN, USB, GPIB
Communication InterfaceLAN, USB, GPIB
Source/Sink4-Quadrant Source/Sink
InterfaceTouchscreen

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