Agilent Technologies E1441A Selecting an Arbitrary Waveform, FSKey:SOURce?, FSKey:STATe

•When the external source is selected, the output frequency is determined by the signal level on the source selected by the TRIG:SOUR command. When a “low” TTL level is present, the carrier frequency is output. When a “high” TTL level is present, the hop frequency is output.

•The maximum external FSK rate is 1 MHz.

FSKey:SOURce?

[SOURce:]FSKey:SOURce? queries the internal FSK source. Returns “INT” or “EXT”.

FSKey:STATe

[SOURce:]FSKey:STATe OFFON disables or enables FSK modulation. To ensure proper operation, you should enable FSK after you have set up the other modulation parameters. Only one modulation mode can be enabled at a time. When you enable FSK, the previous modulation mode is turned off.

FSKey:STATe?

[SOURce:]FSKey:STATe? queries the state of the FSK mode. Returns “0” (OFF) or “1” (ON).

Selecting an Arbitrary Waveform

FUNCtion:USER

[SOURce:]FUNCtion:USER <arb name>VOLATILE selects one of the five built-in arbitrary waveforms, one of four user-defined waveforms, or the waveform currently downloaded to VOLATILE memory.

Parameters • The arb name may contain up to 8 characters. The first character must be a letter (A-Z), but the remaining characters can be numbers (0-9) or the underscore character (“ _ ”). Blank spaces are not allowed. If you specify a name with more than 8 characters, a +783, “Arb waveform name too long” error is generated.

•The function generator does not distinguish between upper- and lower-case letters for the arbitrary waveform name. Therefore, ARB_1 and arb_1 are the same name. All characters are converted to upper case.

110 Agilent E1441A SCPI Command Reference Chapter 3