Triggering and HP3458A connected through GPIB.

[Alexlari]

I have two HP3458A connected through GPIB. As them to start simultaneously during one moment of time (for synchronous work)? Whether it is possible to make it with the help TRIGGER?

[DiegoF]

Hi,

There are two standard commands you can use with IEE 488.2 compliant devices. The GET (group execute trigger) multiline message, which is defined in IEEE 488.1. And the *TRG command defined in the IEEE 488.2, which specifies the same behavior as the GET command.

In both cases you set both instruments as listeners and send the command. Both devices are triggered. There will be delay between the devices caused by the delay in the GPIB bus.

Notice that the GET command is sent in controller mode (ATN line asserted). For this command you would send byte 0x08 using ibcmd. *TRG, on the other hand, is sent as data. You would send the string "*TRG" using ibwrt.

DiegoF
National Instruments.