ESG Family Signal Generators Hardkey and Softkey Reference
LF Out
User’s Guide 4-53
Internal Modulation
This softkey lets you output a signal at the LF OUTPUT connector
where the frequency and shape of the signal 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.
For internal square pulse modulation, the internal source is a sinewave
which is later squared by the modulator to generate the pulse
squarewave. The LF OUTPUT signal for this internal source, therefore,
is a sinewave. For internal pulse modulation, a true variable-width
pulse will be seen on the LF OUTPUT.
Softkey Location:
LF Out > LF Out Source > Internal Modulation
LF Out Amplitude
Use this softkey to scale the output of the signal at the LF OUTPUT
connector. To change the value, press the softkey once. The current
value for LF output amplitude 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
V, or mV terminator softkey. The range of
values allowed is 0 to 5 Vpk in increments from 1 mV to 5 V.
Default Value: 0V
Softkey Location:
LF Out > LF Out Amplitude
LF Out Freq
Use this softkey to set the modulating frequency for the LF output
signal when you have selected the internal source as a function
generator. To change the frequency, press the softkey once. The current
modulating frequency is displayed in the active entry area. To enter a
new frequency, 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
frequencies allowed is 0.1 Hz to 10 kHz. (0.1 Hz to 50 kHz is the range
allowed if sinewave is selected as the internal waveform.)
This softkey is only active when you have selected the internal source to
operate as a function generator.
Default Value: 400 Hz
Softkey Location:
LF Out > LF Out Source > Function Generator > LF Out Freq
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