Agilent Technologies 53220A, Руководство пользователя

Страница: 155 / 294

53220A/53230A User’s Guide 155
Triggering and Gating 5
INITiate[:IMMediate]
- places the counter in the wait-for-trigger state. In this state, trigger signals
are recognized and accepted. Readings taken after the counter is initiated by
INITiate[:IMMediate]
are displayed and stored in the counter’s reading
memory (see Chapter 7 “Formats and Data Flow” for more information).
Initiating Example
//configure for frequency, set system trigger parameters
CONF:FREQ 5E6,0.1,(@2)
TRIG:SOUR EXT // trigger source external
TRIG:SLOP POS // external trigger slope - positive
TRIG:DEL 1
// 1s delay after trigger received
TRIG:COUN 2 // accept 2 system triggers
SAMP:COUN 100 // take 100 readings per system trigger
INIT // initiate the counter - wait for trigger state
FETc? // retrieve measurements from reading memory
READ?
- equivalent to executing
INITiate:IMMediate
directly followed by
FETCh?
.
With
READ?
, readings are displayed, stored in reading memory, and instanta-
neously read into the output buffer (see Chapter 7 “Formats and Data Flow”
for more information).
READ? Example
//configure for frequency, set system trigger parameters
CONF:FREQ 5E6,0.1,(@2)
TRIG:SOUR EXT // trigger source external
TRIG:SLOP POS // external trigger slope - positive
TRIG:DEL 1
// 1s delay after trigger received
TRIG:COUN 2 // accept 2 system triggers
SAMP:COUN 100 // take 100 readings per system trigger
READ? //initiate the counter - fetch readings from memory
Once initiated, a valid trigger signal and a satisfied delay period (if specified)