Keithley 4200-SCS Reference Manual page 808

Section 9: Keithley External Control Interface (KXCI)
Corresponding LPTLIB functions:
Example
The following command resets pulse card 2:
PS 3
PT command: Set pulse timing parameters
This command is used to set pulse period, pulse width, pulse rise time and pulse fall time. The
pulse period setting affects both channels of a pulse card. For example, setting channel 1 of pulse
card 1 to 100 ms also sets the pulse period of channel 2 to 100 ms. For the other timing
parameters (pulse width and rise/fall time), each available channel can have its own unique
setting.
Use the following command string to set these parameters:
PT A, BBB.BBBB, CCC.CCCC, DDD.DDDD, EEE.EEEE
PT
Pulse card channel
A=1, 2, ... or n pulse card channel number. The largest permissible value of n equals the
number of channels in the system (8 maximum).
Pulse period in seconds (floating point number)
BBB.BBBB
Pulse width in seconds (floating point number)
CCC.CCCC
Rise time in seconds (floating point number)
DDD.DDDD
Fall time in seconds (floating point number)
EEE.EEEE
Corresponding LPTLIB functions: pulse_period, pulse_width, pulse_rise,
Example
The following command string sets the pulse period of pulse card 1 to 100µs. It also sets channel
1 for a pulse width of 20µs and rise/fall times for 200 ns:
PT 1, 100e-6, 20e-6, 200e-9, 200e-9
PV command: Set pulse voltage parameters
Using this command string, pulse high, pulse low, range and current limit can be independently set
for each channel of the selected pulse card.
36. The minimum transition time for pulse source only (no measurement) on the slow speed 40 V range is 50 ns for
the Model 4225-PMU and Model 4220-PGU. The Model 4200-PG2 and Model 4205-PG2 have a minimum transi-
tion time of 100 ns.
9-62
pulse_init
= Command string prefix
= 20 e-9 to 1 5 V range
= 250 e-9 to 120 V range
Default: 1e-6
= 10 e-9 to (Period - 10 e-9) Fast speed
= 250 e-9 to (Period - 10 e-9) Slow speed
Default: 500 e-9
= 10 e-9 to 33 e-3 Fast speed
= 50 e-9 to 33 e-3 Slow speed
Default: 100 e-9
= 10 e-9 to 33 e-3 Fast speed
= 50 e-9 to 33 e-3 Slow speed
Default: 100 e-9
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Model 4200-SCS Reference Manual
36
36
4200-901-01 Rev. S / May 2017
pulse_fall