California Instruments 2253iX Manual de instrucciones descargar pdf (Pagina 142)

Programming Manual Compact i / iX Series

AMETEK Programmable Power Division 142

6.8.9 Initiating the Measurement Trigger System

When the AC source is turned on, the trigger system is in the idle state. In this state, the trigger

system ignores all triggers. Sending the following commands at any time returns the trigger

system to the Idle state:

ABORt *RST *RCL

The INITiate commands move the trigger system from the Idle state to the Initiated state. This

enables the AC source to receive triggers. To initiate for a measurement trigger, use:

INITiate:IMMediate:SEQuence3 or

INITiate:IMMediate:NAME ACQuire

After a trigger is received and the data acquisition completes, the trigger system will return to the

Idle state. Thus it will be necessary to initiate the system each time a triggered acquisition is

desired.

Note: You cannot initiate measurement triggers continuously. Otherwise, the measurement data

in the data buffer would continuously be overwritten by each triggered measurement.

6.8.10 Selecting the Measurement Trigger Source

The trigger system is waiting for a trigger signal in the Initiated state. Before you generate a

trigger, you must select a trigger source. To select the external Trigger In1 SMA as the source,

use:

TRIGger:SEQuence3:SOURce EXTernal or

TRIGger:ACQuire:SOURce EXTernal

To select IEEE-488 bus triggers (group execute trigger, device trigger, or *TRG command), use:

TRIGger:SEQuence3:SOURce BUS or

TRIGger:ACQuire:SOURce BUS

To select the signal driving the Trigger Out1 SMA connector, use:

TRIGger:SEQuence3:SOURce TTLTrg or

TRIGger:ACQuire:SOURce TTLTrg

6.8.11 Generating Measurement Triggers

Providing that you have specified the appropriate trigger source, you can generate triggers as

follows:

• By sending one of the following over the IEEE-488:

• TRIGger:SEQuence3:IMMediate

• TRIGger:ACQuire:IMMediate

• *TRG

• a group execute trigger

• By applying a signal with a high-to-low transition to the Trig In1 SMA connector.

• By generating an output transient that causes the Trig Out1 SMA connector to output a pulse.

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California Instruments 2253iX Manual de instrucciones Pagina 142