222 Appendix B
Information for Replacing 4278A with 4288A
Functional Comparison and GPIB Command Correspondence
GPIB command correspondence
Table B-10 List of instrument’s responses to UNBAL/OVLD and Low C
Notification on the display GPIB output
Activated handler interface
signal(s)
Measurement
results
Comparator
sorting results
Measurement
results
Comparator
sorting results
UNBAL
(OVLD)
4278A UNBAL OUT 2.0E20 0 /UNBAL
4288A OVLD **** 9.9E37 11 /OVLD
Low C
4278A
Normal
operation
NPP
Normal
operation
11 /PLO
4288A
Normal
operation
LOWC
Normal
operation
Normal
operation
*1
/LOW_C_REJECT
+ One of sorting result signals
(/BIN1-9, /OUT_OF_BINS,
/AUX_BIN) + /PLO or PHI
*2
*1.The measurement status (Nomal:0, OVLD:1, Low C:2) is used to detect Low C through
GPIB.
*2./LOW_C_REJECT becomes active together with the signal that corresponds to the
result of normal sorting judgment (judgment result when no error occurs).
Table B-11 Correspondence of comparator function commands
Setup
GPIB command
4278A 4288A
Comparator
OFF COMP0 :CALC:COMP OFF
ON COMP1 :CALC:COMP ON
Limit parameter
(sorting target
parameter)
*1
Cp-D LPAR1
:CALC1:FORM CP
:CALC2:FORM D
Cp-Q LPAR2 :CALC2:FORM Q
Cp-G LPAR3 :CALC2:FORM G
Cs-D LPAR4
:CALC1:FORM CS
:CALC2:FORM D
Cs-Q LPAR5 :CALC2:FORM Q
Cs-Rs LPAR6 :CALC2:FORM RS
Reverse parameter
function
OFF REVP0
Not available
ON REVP1
Limit mode selection
% tolerance LMOD1 :CALC:COMP:MODE PCNT
Absolute tolerance LMOD2 :CALC:COMP:MODE DEV
Sequential LMOD3 Not available
Absolute Not available :CALC:COMP:MODE ABS
Setting limit range in
the tolerance mode
Nominal value
(reference value)
NOM= :CALC:COMP:PRIM:NOM
BIN1 BIN1=
:CALC:COMP:PRIM:BIN1
:CALC:COMP:PRIM:BIN1:STAT ON
BIN2 BIN2=
:CALC:COMP:PRIM:BIN2
:CALC:COMP:PRIM:BIN2:STAT ON
BIN3 BIN3=
:CALC:COMP:PRIM:BIN3
:CALC:COMP:PRIM:BIN3:STAT ON