Agilent Technologies E1441A user service FUNCtion:SHAPe?, PULSe:DCYCle, Parameters, Chapter

	Sine	Square	Triangle	Ramp	Noise	Arb
AM Carrier	X	X	X	X		X
AM Modulating Wave	X	X	X	X	X	X
FM Carrier	X	X	X	X		X
FM Modulating Wave	X	X	X	X	X	X
FSK Modulation	X	X	X	X		X
Burst Modulation	X	X	X	X		X
Frequency Sweep	X	X	X	X		X

•For arbitrary waveforms, the maximum amplitude will be limited if the data points do not span the full range of the output DAC (Digital- to-Analog Converter). For example, the built-in “SINC” waveform does not use the full range of values between ±1 and therefore its maximum amplitude is 6.084 Vpp (into 50 ohms).

•For arbitrary waveforms an inherent offset may be present (if the average of the waveform is not equal to zero). The function generator calculates the average of the data points and compares the average to zero volts. If the average is not within two DAC (Digital-to-Analog Converter) counts of zero volts, an inherent offset is present.

FUNCtion:SHAPe?

[SOURce:]FUNCtion:SHAPe? queries the output function. Returns “SIN”, “SQU”, “TRI”, “RAMP”, “NOIS”, “DC”, or “USER”.

PULSe:DCYCle

[SOURce:]PULSe:DCYCle <percent>MINMAX sets the duty cycle in percent for square waves only. Duty cycle represents the amount of time per cycle that the square wave is high. The default is 50%. [ Stored in volatile memory ]

Parameters

Parameter Name	Parameter Type	Range of Values	Default Units
percent	numeric	20 to 80	percent
		(see comments)

Comments • Duty cycle: 20% to 80%, in 1% increments (frequency ≤5 MHz). 40% to 60%, in 1% increments (frequency > 5 MHz). The default is 50%.

•The duty cycle setting is remembered when you change from square wave to another function. When you return to the square wave function, the previous duty cycle is used. The APPLy command automatically sets the duty cycle to

112 Agilent E1441A SCPI Command Reference Chapter 3