Appendix B 221
Information for Replacing 4278A with 4288A
Functional Comparison and GPIB Command Correspondence
B. Information for Replacing
4278A with 4288A
Comparator
Functional comparison
Differences in usage of GPIB commands
4278A 4288A
Sorting target parameter
Cp-D, Cp-Q, Cp-G, Cs-D,
Cs-Q, Cs-Rs
Cp-D, Cp-Q, Cp-G, Cp-Rp,
Cs-D, Cs-Q, Cs-Rs
Reverse parameter function Available N/A
Limit mode (way of
designating the limit
range)
Using a deviation from
the reference value for
designation
% tolerance mode, absolute
tolerance mode
% tolerance mode, absolute
tolerance mode
Using an absolute
value for designation
Sequential mode Absolute mode
BIN sorting
Primary parameter 9 BINs + OUT_OF_BINS 9 BINs + OUT_OF_BINS
Secondary parameter PASS/FAIL judgment PASS/FAIL judgment
AUX BIN function Available Available
BIN count function
Counting all sorting results,
counting for each channel
Counting all sorting results,
counting for each channel
Low C reject function
Select the detection limit value
from 1%, 2%, 3%, 4%, 5%, or
6%.
Set up the detection limit value
freely within the range of 0 to
10%.
4278A 4288A
Sorting target
parameter
Can be set up independently of the
measurement parameter.
Depends on the measurement parameter
and cannot be set up independently.
ON/OFF of BIN
You cannot turn ON/OFF each BIN
separately. Sorting targets are all of the
BINs for which the limit range has been set
up. Therefore, to exclude BINs that have
been set up from sorting targets, you need
to clear all the limit ranges and set them
again.
You can turn ON/OFF each BIN separately.
Sorting targets are the BINs set to ON only.
Therefore, when setting up BINs, you need
to set up the limit range for each BIN and
then turn it ON.
Setting limit ranges
in absolute values
You use a single command to set up the
limit ranges for all BINs (sequential mode).
The limit ranges of each BIN must be
continuous.
You use several commands to set up the
limit range for each BIN separately
(absolute mode). The limit range of each
BIN does not have to be continuous (that is,
gaps are allowed).
ON/OFF of Low C
reject function
Executing the limit value setup command
(the boundary value to detect Low C) turns
ON the Low C reject function.
Executing the limit value setup command
does not turn ON the Low C reject function
automatically. Therefore, you need to set
up the limit value and then turn ON the
Low C reject function.
Sorting result when
Low C occurs
Sorts into NPP reserved only for Low C. Sorts into suitable BIN according to
measurement results. (The 4288A does not
have a BIN reserved for only Low C.)
BIN count function
UNVAL: Counts into OUT_OF_BINS.
Low C: No count
OVLD: Counts into OVLD.
Low C: Counts into a suitable BIN
according to measurement results.
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