ESG Family Signal Generators Hardkey and Softkey Reference
LF Out
User’s Guide 4-55
LF Out Source
Reveals a menu of choices for LF output sources. You can choose to
output the signal from the internal source as it is being used by a
modulation or you can use the internal source as a function generator
and select that signal to output at the LF OUTPUT connector.
If you choose the internal source, the frequency and shape of the signal
at the LF OUTPUT connector is set by the internal source as it is being
used by a modulation. For example, if the internal source is currently
assigned to an AM path configuration and AM is turned on, the signal
output at the LF OUTPUT connector will have the frequency and shape
of the amplitude modulating signal. You can scale the amplitude of the
output signal using the
LF Out Amplitude softkey.
If you choose to set the internal source as a function generator, you can
select a frequency and shape in addition to selecting the amplitude for
the LF output signal. When you use the internal source in this capacity,
any modulation with the internal source selected is turned off.
Default Value: Internal Modulation
Softkey Location:
LF Out > LF Out Source
LF Out Start Freq
Use this softkey to change the starting frequency for swept-sine low
frequency output. To change the value, press the softkey once. The
current value for the LF Out start frequency is displayed in the active
entry area. To enter a new value, rotate the front panel knob until the
desired value is displayed, use the up and down arrow keys, or enter the
value using the numeric keypad and press the
Hz or kHz terminator
softkey. The range of values allowed is 0.1 Hz to 50 kHz. The minimum
increment allowed is 0.1 Hz.
This softkey is coupled to the
LF Out Freq softkey in the initial LF Out
Menu and the
LF Out Tone 1 Freq softkey in the LF Out Dual-Sine Menu.
Any value set for
LF Out Start Freq is reflected in the LF Out Freq and
LF Out Tone 1 Freq softkeys. Conversely, if you change the value for either
the
LF Out Freq softkey or the LF Out Tone 1 Freq softkey, the value for
LF Out Start Freq is changed to match.
This softkey is only active when you have selected the internal source to
operate as a function generator.
Default Value: 400.0 Hz
Softkey Location:
LF Out > LF Out Source > Function Generator >
LF Out Waveform > Swept-Sine > LF Out Start Freq
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