Data Formats and Destinations
The HP E1326B/E1411B multimeter allows you to specify the
measurement (data) format and reading destination parameters which affect
throughput speed. This section identifies the formats available and shows
you how to display and store measurements.
Data Formats
The multimeter data formats are selected with the command:
FORMat[:DATA] <
type
> [,<
length
>]
The formats (and lengths) are shown in Table 4-2.
Table 4-2. Multimeter Data Formats
Type
Representation
Bytes/Reading
ASCII
+-1.-123
15
REAL 64
# <non-zero digit> <block length> <8-bit data bytes>
8
REAL 32
# <non-zero digit> <block length> <8-bit data bytes>
4
REAL 64 and REAL 32 numbers are transferred to the computer in the IEEE 488.2-1987
Definite Length Arbitrary Block format. Data in this format is preceded by a header
consisting of # <non-zero digit> <block length>. <non-zero digit> indicates the number of
digits representing <block length>. <block length> indicates the number of 8-bit data bytes
which follow. The following examples show how to interpret the Arbitrary block header.
REAL, 32 #14 <4 bytes> 1 reading
#240 <40 bytes> 10 readings
#44000 <4000 bytes> 1,000 readings
REAL, 64 #18 <8 bytes> 1 reading
#280 <80 bytes> 10 readings
#48000 <8000 bytes> 1,000 readings
The default format is ASCII. Readings in ASCII are followed by a comma (,).
A line feed (LF) and End-Or-Identify (EOI) follow the last reading in all
formats.
Specifying a Format
The following program segment shows you how to select a data format.
Chapter 3 contains an example on selecting a format and entering data with the
definite length arbitrary block header into an HP Series 200/300 computer.
FORM REAL,64
CONF:FRES 1861,MAX,(@100:103)
RES:OCOM ON
TRIG:COUN 3
READ?
80 Understanding the HP E1326B/E1411B Multimeter
Chapter 4
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