Agilent Technologies 4288A, Programming Manual

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Chapter 9 113
Measurement Applications (Sample Programs)
Measurement with changing channels (scanning)
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Measurement with changing channels (scanning)
Example 9-3 shows a sample program to measure a capacitor (1 nF) that is used in a
four-channel scanning system. This program is stored on the sample program disk under
the filename “meas_scn.bas”.
Prepare the scanning system and then start the program. “Set the Scanner's Channel to
No.0, and Set Open-Connection” is displayed. Set the channel of the scanner in the system
to No. 0, bring the measurement terminal of channel 0 (for example, a contact probe) to the
OPEN state, and press the
[y] key and [Enter] key in this order. The OPEN compensation
data for channel 0 is measured. In the same way, measure the OPEN compensation data for
channels 1 to 3.
When measurement of the OPEN compensation data for all of the channels is finished,
“Set the Scanner's Channel to No.0, and Set Short-Connection” is displayed. Set the
channel of the scanner in the system to No. 0, bring the measurement terminal of channel 0
to the SHORT state, and press the
[y] key and [Enter] key in this order. The SHORT
compensation data for channel 0 is measured. In the same way, measure the SHORT
compensation data for channels 1 to 3.
When measurement of the SHORT compensation data for all of the channels is finished,
“Set the Scanner's Channel to No.0, and Input Load(Cp) Value @1kHz” is displayed. Set
the channel of the scanner in the system to No. 0. According to the on-screen instructions,
enter the Cp value of the LOAD standard (pre-valued working standard) for channel 0 at 1
kHz. In the same way, enter the D value at 1 kHz and the Cp and D values at 1 MHz.
When you finish defining the LOAD standard values, “Set Load-Connection” is displayed.
Connect the working standard to the measurement terminal of channel 0 and press the
[y]
key and [Enter] key in this order. The LOAD compensation data for channel 0 is measured.
In the same way, measure the LOAD compensation data for channels 1 to 3.
When the measurement of the compensation data is finished, “Set DUT of All Channels.
Set the Scanner's Channel to No.0. Input External Trigger!” is displayed. Connect the
DUTs to the measurement terminals of all channels, set the channel of the scanner to No. 0,
and then input an external trigger signal from the scanner (or handler) interface. The
measurement is performed. In the same way, perform measurement for channels 1 to 3.
When measurement for all the channels is finished, the sorting judgment result for the BIN
setup (see table below), measurement status, and measured primary and secondary
parameter values for all of the channels are displayed at the same time. Repeat this
operation 10 times.
When the 10 measurements for each channel (total 40 times) are finished, the counts sorted
to each BIN for each channel are displayed and the program finishes.
Lower limit value Upper limit value
BIN1 -1% 1%
BIN2 -2% 2%
BIN3 -3% 3%
Secondary parameter 0 0.1