Keysight 53220A Mode D'emploi page 256

7 Formats and Data Flow
– when count number of readings have entered reading memory, bit 12 (Rdg
Once the threshold is reached, the number of readings in memory must drop
below the threshold level in order to detect when the threshold is reached again.
Memory threshold example
This program sets up the counter to take 1,250,000 readings. Because volatile
reading memory capacity is 1,000,000 readings, readings will be over-written
(memory overflow) if data is not retrieved before memory fills. To prevent memory
overflow, a reading threshold is set and monitored. When the number of readings
in memory reaches the threshold, all readings in memory at that time are
retrieved.
*RST;*CLS
SYST:TIM .001
CONF:FREQ 1E6, 0.1, (@1)
INIT
// loop until all readings complete
For (cnt=0;cnt<1.25E6;cnt +=10000)
R? 10E3
256
Mem Threshold) in the Standard Operation Register is set to '1'. By monitoring
this bit, readings can be transferred from memory to the output buffer once a
given number of measurements have occurred.
TRIG:COUN 5
SAMP:COUN 250E3
FORM:DATA REAL, 64
DATA:POIN:EVEN:THR 10E3 // set memory threshold to 10k
Do
{spoll=STAT:OPER:COND?;
sleep (100)
}while !(spoll&4096) // repeat until threshold is reached
// retrieve readings from memory 10k at a time
// reset, start from known state
// set a 1 ms measurement timeout
// configure measurements
// send 5 system triggers
// take 250k readings/trigger
// set data format to binary
// initiate readings
// serial poll condition reg
// wait 100 ms
Keysight 53220A/53230A User's Guide