Ametek Lx Series II Programming Manual Instrukcja Użytkownika Pobierz pdf (Strona 145)

Programming Manual Lx \ Ls Series II

141

6.8.4 Simultaneous Output Phase Measurements

You can return simultaneous measurements from all output phases of the source in the three

phase mode using the FETCh query. Unlike MEASure queries, FETCh queries do not trigger the

acquisition of new data when they are executed. First, you must initiate the measurement trigger

system and generate a measurement trigger as explained in the following section "Triggering

Measurements". When the measurement data has been acquired by the voltage and current data

buffers for each output phase, use INSTrument:NSELect to select each phase, and FETCh to

return the specified measurement data. The following commands return rms voltage:

INSTrument:NSELect 1

FETCh:VOLTage:AC?

INSTrument:NSELect 2

FETCh:VOLTage:AC?

INSTrument:NSELect 3

FETCh:VOLTage:AC?

6.8.5 Returning Voltage and Current Data From the Data Buffer

The MEASure and FETCh queries can also return all 4096 data values of the instantaneous

voltage and current buffers. These are:

MEASure:ARRay:CURRent?

MEASure:ARRay:VOLTage?

6.8.6 Triggering Measurements

You can use the data acquisition trigger system to synchronize the timing of the voltage and

current data acquisition with an external trigger source. Then use the FETCh commands to return

different calculations from the data acquired by the measurement trigger.

The following measurement trigger sources can be selected:

BUS selects IEEE-488 bus triggers.

EXTernal selects the external Trigger In1 SMA connector.

TTLTrg selects the signal driving the Trigger Out1 SMA connector.

1 2 ... 140 141 142 143 144 145 146 147 148 149 150 ... 241 242

Brak uwag

Ametek Lx Series II Programming Manual Instrukcja Użytkownika Strona 145