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User Manual 301/302

Figure 3.29 Channel to Channel Phase adjustment in WaveWiz

Amplitude

Modulation

Commands

The AM input is used for modulating the amplitude at the main output

connector. The carrier signal is any continuous waveform, which was

programmed for the output. The envelope signal is supplied from an

external source to the AM input.

The command:

AM {OFF | ON}

controls the AM input where ON enables AM and OFF is the default.

The query:

AM?

queries the AM input state and returns “1” (ON) or “0” (OFF).

There is no specific control in WaveWiz to perform this function. In

order to control AM, the SCPI command can be directly entered from

the system tab in the Instrument Control Panel.

System-Related

Commands

System-related commands are used to place the instrument in a

known state, clear the instrument to its defaults, or query the

generator for system errors or identification. The following is an

overview of the system-related commands.

The query:

SYSTem:ERRor?

reads one error from the error queue. Up to 30 errors can be stored in

the generator's error queue. Errors are retrieved in first-in-first-out

(FIFO) order. The first error returned is the first error that was stored.

When all errors have been read from the queue, the generator returns

+0, "No error".

If more than 30 errors have occurred, the last error stored in the

queue (the most current error) is replaced with -350,"Too many

errors". No additional errors are stored until all errors have been

removed from the queue. The error queue is cleared only when power

is cycled off or after the execution of a *CLS command. The *RST

command does not clear the error queue.

Configuring the Instrument

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Wavetek 39A Especificações Página 86