Tektronix DSA8300, Programmer'S Manual

Page: 416 / 455

Status and Events
ACQUIRE:STATE OFF
SELECT:CH1 ON
HORIZONTAL:RECORDLENGTH 500
ACQUIRE:MODE SAMPLE
ACQUIRE:STOPAFTER:CONDITION ACQWFMS
ACQUIRE:STOPAFTER:COUNT 100
ACQUIRE:STOPAFTER:MODE CONDITION
/** Enable the status registers **/
DESE 1
*ESE 1
*SRE 32
/** Set up measurement parameters **/
MEASUREMENT:MEAS1:TYPE AMPLITUDE
MEASUREMENT:MEAS1:SOURCE CH1
/** Acquire waveforms until conditional stop occurs**/
ACQUIRE:DATA:CLEAR
ACQUIRE:STATE ON
/**Wait until the acquisition is complete
before taking the measurement**/
*OPC
/**The program can now do different tasks such as
talk to other devices.
The SRQ, when it comes,
interrupts those tasks and returns control to this
task.**/
/** Take amplitude measurement **/
MEASUREMENT:MEAS1:VALUE?
This technique is more ef fi cient but requires more sophisticated programming.
*OPC?
The *OPC? query places a 1 in the Output Queue once an operation is complete.
A timeout could occur if you try to read the output queue before there is any
data in it.
The same command sequence using the *OPC? query for synchronization looks
like this:
/** Sets up conditional acquisition **/
ACQUIRE:STATE OFF
SELECT:CH1 ON
HORIZONTAL:RECORDLENGTH 500
ACQUIRE:MODE SAMPLE
ACQUIRE:STOPAFTER:COUNT 1
ACQUIRE:STOPAFTER:MODE CONDITION
/** Set up measurement parameters **/
MEASUREMENT:MEAS1:TYPE AMPLITUDE
EASUREMENT:MEAS1:SOURCE CH1
/** Clear data, and then acquire waveforms until
conditional stop occurs**/
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