Agilent Technologies 4288A, Руководство по программированию

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228 Appendix B
Information for Replacing 4278A with 4288A
Functional Comparison and GPIB Command Correspondence
Reading out the measurement result
Functional comparison
The 4288A does not provide a continuous data output function (spew-out mode). However,
by executing measurement (executing the
:READ? command and then supplying a
trigger), you can read out the measurement result upon completion of measurement.
Differences in usage of GPIB commands
4278A 4288A
Data output (data transfer) format ASCII format, binary (64-bit) format ASCII format, binary (64-bit) format
Measured data that can be
outputted (read out)
Measured primary/secondary
parameter values,
comparator sorting result,
BIN count value
Measurement status,
measured primary/secondary
parameter values,
comparator sorting result,
BIN count value,
measurement signal level monitor
value
Size of the block data transfer
(data buffer)
For 500 measurements
(only with scanner interface)
For 1000 measurements
(Data buffer 3)
Continuous data output
(spew-out mode)
Available Unavailable
Reading out the instrument setup
state list (
*LRN?
)
Available
Unavailable (The query is available
for all the setup commands. Therefore,
use each command for reading out.)
4278A 4288A
Read-out data
The measured primary parameter value,
measured secondary parameter value, and
comparator sorting result
are read out in this order.
You can select whether to read out the
comparator sorting result.
The measurement status,
measured primary parameter value,
measured secondary parameter value, and
comparator sorting result
are read out in this order.
You cannot select whether to read out the
comparator sorting result, which depends on
the ON/OFF state of the comparator
function.
Block data transfer
(data buffer)
ON/OFF:
Setting the multi-compensation function to
ON starts memorizing the measurement
result into the internal memory.
Read-out data:
Data sets of 2 (3) items consisting of the
measured primary parameter value and
measured secondary parameter value (and
comparator sorting result) are read out for the
number of measurements (up to 500) that
have been stored at the execution of the
command.
(You can select whether to read out the
comparator sorting result.)
ON/OFF:
Regardless of the ON/OFF state of the
multi-compensation function, making a setup
to memorize data into the data buffer
(internal memory) automatically starts the
process of memorizing the measurement
result.
Read-out data:
Data sets of 3 (4) items consisting of the
measurement status, measured primary
parameter value, and secondary parameter
value (and comparator sorting result) are
read out for the specified number of
measurements (up to 1000).
(The comparator sorting result is read out
when the comparator function is set to ON.)
Binary format
Header is 4 bytes (fixed). See Figure B-1. Header is (2 +
α
) bytes (not fixed). See
Figure B-1.