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53220A/53230A User’s Guide 239
Formats and Data Flow 7
Format
ASCII
is set following an instrument reset (
*RST
) or front panel pre-
set (
PRESet
). A line feed (LF) and End-Or-Identify (EOI) follow the last reading
in both formats.
Specifying a Format
Data formats can be specified during counter configuration as shown in the
following segment:
CONF:FREQ 1.0E6
FORM REAL, 64
SAMP:COUN 5
INIT
FETC?
In this segment, measurements initiated by
INIT
are stored in reading mem-
ory. When
FETC?
(ed) from memory to the output buffer the readings are con-
verted to REAL format.
Setting the Block Transfer Byte Order
Indefinite-length and definite-length REAL (binary) data transfers (Table 7-1)
associated with the
READ?
,
FETCh?
,
R?
, and
DATA:REMove?
commands have
a default byte order of
NORMal
in which the most-significant byte (MSB) is
sent first (big-endian byte order). The command used to specify or change the
byte order is:
FORMat:BORDer {NORMal | SWAPped}
FORMat:BORDer?
(query form)
With the
SWAPped
byte order the least-significant byte of each data point
(reading) is sent first (little-endian byte order). Most PCs use the swapped
(little-endian) byte order.
Following a reset (
*RST
) or front panel preset (
Preset
), the byte order is set to
NORMal.