Specifications

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FREQuency?

queries the frequency setting for the standard function currently active

and returns a value in hertz.

The command:

FREQuency:RASTer {<frequency> | MINimum |MAXimum}

Sets the sample clock frequency for the user and sequenced mode

parameters. MIN selects the lowest frequency allowed for the currently

active segment or sequence. MAX selects the highest frequency

allowed for the currently active segment or sequence. The default

sample clock frequency setting is 10 MHz for all.

The query:

FREQuency:RASTer?

queries the sample clock frequency setting for the arbitrary segment

or sequence currently active and returns a value in Hertz.

Using WaveWiz, frequency of standard signals is also set in the

Standard tab in the Instrument Control Panel. See Figure 3.9 above.

Selecting the

External SCLK

In cases where synchronization to other instrument in the system is

needed, one may use the front panel SCLK input for replacing the

internal sample clock generators. Use the following command to

select the external SCLK input:

FREQuency:RASTer:SOURce {INTernal | EXTernal}

INT is the default state of the instrument after power up. Select EXT to

activate the front panel SCLK input.

The query:

FREQuency:RASTer:SOURce?

queries the sample clock source and returns INT or EXT.

WaveWiz has no specific command control for this function; it is set by

sending a SCPI command directly from the system menu in the

Instrument Front Panel. (For a more detailed description see later in

this chapter).

Configuring The Instrument