Agilent Technologies E1441A user service

the maximum value allowed with the present offset voltage. (Vmax is either 10 volts for a high impedance termination or 5 volts for a 50 ohm termination; Vpp is the output amplitude in volts peak-to-peak.)

Voffset

Vpp	≤ V		and
+ -------		max
2

Voffset

≤2Vpp

A -221, “Settings conflict” error is generated and the amplitude is adjusted.

A momentary glitch occurs in the output waveform at certain voltages due to output attenuator switching. This positive-going glitch occurs when the output voltage crosses the break-point voltage either from a lower voltage or a higher voltage. The voltages are shown below (inVpp) for a 0 volt dc offset: .252, .399, .502, .796, 1, 1.59, 2.0, 3.17, 3.99, 6.32, 7.96

The output voltage will momentarily drop to 0 volts at certain voltages due to output relay switching. This occurs when the output voltage crosses the break-point voltage either from a lower voltage or a higher voltage. The voltages are shown below (in Vpp) for a 0 volt dc offset:

.317, .632, 1.26, 2.52, 5.02

You can set the units for output amplitude to Vpp, Vrms, or dBm. See “Output Units” on page 25. for more information.

For dc volts, the output level is actually controlled by setting the offset voltage. You can set the dc voltage to any value between ±5 Vdc into 50 ohms or ±10 Vdc into an open circuit. See “DC Offset Voltage” on page 24. for more information.

Use the following command to set the output amplitude:

VOLTage <amplitude>MINimumMAXimum

You can also use the APPLy command to select the function, frequency, amplitude, and offset with a single command. Because the APPLy command also changes duty cycle, modulation type, trigger source, and trigger slope, you must place the APPLy command first in any sequence of configuration commands.

DC Offset Voltage At power-on, the dc offset is set to 0 volts. You can set the offset to a positive or negative number with the restrictions shown below. If the specified offset voltage is not valid, the function generator will automatically adjust it to the maximum dc voltage allowed with the present amplitude. (Vmax is either 10 volts for a high impedance termination or 5 volts for a 50 ohm termination; Vpp is the output amplitude in volts peak-to-peak.)

Voffset

Vpp	≤ V		and
+ --------		max
2

Voffset

≤2Vpp

A -221, “Settings conflict” error is generated and the offset is adjusted.

DC Offset and Output Termination: The offset voltage is automatically adjusted (and no error is generated) if you change the output termination. For example, if you set the offset to 100 mVdc and then change the

24 Agilent E1441A Application Information Chapter 2