Publicité
Les langues disponibles
Les langues disponibles
7
Formats and Data Flow
2 all readings are stored in an internal counter format - the programmed format
3 if read ing memory overflows the first (oldest) readings are overwritten and the
Output buffer
Data is available to the PC over the LAN, USB, and GPIB interfaces once it is in the
output buffer
transferred from memory to the buffer. If during a transfer the output buffer fills,
command execution is paused until readings are removed by the PC - creating
room in the buffer. No readings are lost.
Transferring readings from memory to the output buffer
The following commands transfer readings from volatile reading memory to the
buffer.
READ?
FETCh?. With READ?, once all readings specified by TRIGger:COUNt and
SAMPle:COUNt are complete and in memory, they are instantaneously read into
the output buffer
If the data format is REAL (FORMat subsystem), each block of readings generated
by READ? is preceded by an IEEE 488.2 Indefinite-Length block header
(Table
string, READ? should always be the last command in the string.
READ? example
// frequency meas of 500 kHz signal with uHz resolution
CONF:FREQ 500E3, 1E-6, (@1)
READ?
252
(FORMat subsystem) is set when readings are transferred to the output buffer.
'Reading Mem Ovfl' bit (14) in the Questionable Data Register is set. The most
recent measurements are retained.
(Figure
7-1). The following section explains how readings are
- is equivalent to executing INITiate:IMMediate directly followed by
(Figure
7-1). As such, when sending multiple commands in a single command
TRIG:COUN 1
SAMP:COUN 10
7-1).
// configure counter
// set trigger count
// take 10 readings
// read readings when complete
Keysight 53220A/53230A User's Guide
Publicité
