4200-900-01 Rev. K / February 2017 Return to Section Topics 3-25
Model 4200-SCS User’s Manual Section 3: Common Device Characterization Tests
Figure 3-21
Forcing Function: CVU Frequency Sweep (bias)
When this test is run (see Figure 3-21), the following force-measure sequence
occurs:
1. The DC source goes to the PreSoak voltage of 5 V for the hold time period.
2. The DC bias goes to 1 V for the system delay and programmed delay time periods.
3. The 4210-CVU makes a measurement for the first frequency point (100 kHz). 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 the other frequency points. The system delay and programmed delay
are repeated for each subsequent measurement.
The sweep delay, hold time and output disable are set from the ITM timing
window for sweeping.
Figure 3-22
CVU Frequency Sweep (bias) output
HT
0V
1V
100kHz
(Start)
Delay
SD
Meas
Meas
Meas
300kHz
(Stop)
200kHz
Trigger
AC Voltage = 15mVRMS
Bias
5V
PreSoak
Delay
SD
Delay
SD
HT = Hold Time
SD = Built-In System Delay
Delay = Programmed Delay
Meas = Measure Time
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