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Pulse Current Measurements 3-25

Figure 3-5

4 Up

3 Down

0 Up

4 Down

5 Up

0 Down

Sample pulse forms for step method

Figure 3-6

0 Up

5 Down

5 Up

0 Down

Sample one-shot only pulses for step method

Trigger level settings

The trigger level may be set to a unique value for each active step. Use the TLEVx command

to set appropriate trigger levels for each active step in the waveform. Make sure that the maxi-

mum setting for the selected trigger level range is not exceeded. (See “Trigger level range” on

page 3-29.)

Figure 3-7 has 5 rising

edge steps and 4 falling edge steps. Set the trigger levels for each step

measurement according to the expected pulses. Based on the wave form, the nine trigger levels

could be se

t as follows:

Rising: Falling:

TLEV1 100mA TLEV6 900mA

TLEV2 300mA TLEV7 600mA

TLEV3 500mA TLEV8 400mA

TLEV4 700mA TLEV9 300mA

TLEV5 900mA

For a programming example of this sample, see “Sample step method” on page 3-32.

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Keithley 2306 User Manual

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