Problem of connection between Signal Generator R&S SMG and GPIB

[Flod29]

Hello everybody,

I have many instruments that I control with GPIB including the signal generator R&S SMG, and I can communicate with the SMG but after a time, MAX NI doesn't recognize it and I can't do anything with it in local mode, It doesn't respond to any button, so to control it, I must turn off the device and then turn on to control it in local mode, but NI MAX doesn't recognize it. But if I wait 5 minutes before turn on the device, MAX recognize it. So I am confuse and I don't know why it happens.
 If you have a solution, it will be perfect,

Sorry for my english,

Regards,

Flo

[crossrulz]

How many other instruments?  Are you sure they all have unique addresses?

This sort of sounds like an issue with the firmware of your device.  You should probably get a hold of R&S tech support.

[Flod29]

Thank you for your answer

I have two others instruments, a spectrum analyzer which uses the adress 21, and a programmable filter which uses the adress 8, and the adress of the SMP is 21, so I'm sure they have unique addresses. I rensigner me if it is the firmware and I tell you if it is that,

Flo

[crossrulz]

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@Flod29 wrote:

Thank you for your answer

I have two others instruments, a spectrum analyzer which uses the adress 21, and a programmable filter which uses the adress 8, and the adress of the SMP is 21, so I'm sure they have unique addresses. I rensigner me if it is the firmware and I tell you if it is that,

Flo

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Your spectrum analyzer and SMP are both set to 21?  Those are not unique.  I'm really hoping you made a typo there.  Well, not really because that would be your problem.

[Flod29]

No sorry for this mistake, the adresse for the SMG is 28,

Flo

[Flod29]

I use a driver in LabVIEW which correspond to the driver of the SMH (R&S), maybe when I use this driver, there are a problem, but normally this driver is compatible,

Flo

[nyc_(is_out_of_here)]

Try swapping the GPIB cables.

Also make sure that they are connected securely.