Formats and Data Flow 7
Keysight 53220A/53230A User’s Guide 249
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 memory.
When FETC?(ed) from memory to the output buffer the readings are converted 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.
Reading transfer size
Each reading read from the output buffer in ASCII format is 23 bytes. Each
readings in REAL format is eight bytes.
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