Features and Functions | 2 |
Modulating Waveform Frequency
The range of the modulating waveform frequency is 2 mHz to 20 kHz. The default modulating waveform frequency is 100 Hz.
Soft Front Panel Operation
On the Mod Frequency panel as shown in Figure 2- 18, input the desired modulating frequency value and select the unit from the drop down list.
Remote Interface Operation
FM:INTernal:FREQuency <frequency>
Frequency Deviation
The frequency deviation setting represents the peak variation in frequency of the modulated waveform from the carrier frequency.
The range of the frequency deviation is 1 Hz to 500 kHz (limited to 100 kHz minus 1 μHz for Ramp and Arbitrary waveforms). The default frequency deviation is 100 Hz.
The carrier frequency must always be greater than or equal to the frequency deviation plus 1 μHz. If you attempt to set the deviation to a value plus 1 μHz greater than the carrier frequency (with FM enabled), the U2761A will automatically adjusts the deviation to the maximum value allowed with the present carrier frequency.
The sum of the carrier frequency and deviation must be less than or equal to the maximum frequency for the selected function (20 MHz for Sine and Square, and 200 kHz for Ramp and Arbitrary waveforms). If you attempt to set the deviation to a value that is not valid, the U2761A will automatically adjusts it to the maximum value allowed with the present carrier frequency.
U2761A User’s Guide | 59 |
