Keithley 4200-SCS, Руководство пользователя

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1-20 Return to Section Topics 4200-900-01 Rev. K / February 2017
Section 1: Getting Started Model 4200-SCS User’s Manual
Force-measure timing
Bias function
Timing for the force-measure process for a bias function is shown in Figure 1-18 .
When the test is started, the following timing sequence takes place:
1. The DC source outputs the presoak voltage for the hold time period.
2. The DC source goes to the DC bias voltage.
3. After the built-in system delay and time Interval periods, the Model 4210-CVU performs a
measurement. The AC test signal is applied just before the start of the measurement. AC
drive is turned off after the measurement is completed.
4. Step 3 is repeated for every measurement.
Figure 1-18
Force-measure timing
Sweep function
Force-measure timing for a sweep function is similar to the timing for a bias function (shown in
Figure 1-18 ), with the following differences:
• The hold time is repeated at the beginning each subsequent sweep step.
• A programmed delay is used in place of the interval.
Pulse cards
The Keithley Instruments pulse cards are two-channel, high speed, voltage pulse generator cards
that provide the following types of output:
There are two pulse generator instrument cards available for 4200-SCS:
• 4220-PGU Pulse Generator Unit
• 4225-PMU Ultra-Fast IV Module.
Both cards offer:
• Two output channels
• Standard (2-level) pulse
• Segment ARB
®
waveform
• Full Arb
Each output channels has two output ranges:
• 10 V (into high impedance, 5 V into 50
Ω
)
• 40 V (into high impedance, 20 V into 50 Ω )
HT
0V
1V
Meas Meas
Bias
HT = Hold Time
SD = Built-In System Delay
Int = Programmed Interval
Meas = Measure Time
Run
Test
5V PreSoak
Int
SD
Int
SD