ESG Family Signal Generators Hardkey and Softkey Reference
FM
User’s Guide 4-29
FM Sweep Trigger
Pressing this softkey reveals a menu of choices for triggering swept-sine
frequency modulation. You can choose triggering that occurs
immediately, triggering that is supplied via the GPIB bus, triggering on
either the positive or negative edge of a signal supplied to the
TRIGGER IN connector, external triggering, or triggering by the front
panel
Trigger key.
Default Value: Immediate
Softkey Location:
FM/ΦM > FM Waveform > Swept-Sine > FM Sweep Trigger
FM Tone 1 Rate
Press this softkey to set the internal modulation frequency for the FM
tone 1. Enter the desired rate using the up and down arrow keys, the
front panel knob, or enter a value using the numeric keypad and press
the
kHz or Hz terminator softkey. The range of values allowed is 0.1 Hz
through 50 kHz. The minimum increment allowed is 0.1 Hz.
This softkey is coupled to the
FM Rate softkey in the initial FM Menu
and the
FM Start Rate softkey in the FM Swept-Sine Menu. Any value set
for
FM Tone 1 Rate is reflected in the FM Rate and FM Start Rate softkeys.
Conversely, if you change the value for either the
FM Rate softkey or the
FM Start Rate softkey, the value for FM Tone 1 Rate is changed to match.
Default Value: 400.0 Hz
Softkey Location:
FM/ΦM > FM Waveform > Dual-Sine > FM Tone 1 Rate
FM Tone 2 Ampl Percent Of Peak
Press this softkey to set the amplitude of the alternate frequency/rate
as a percent of the peak LF analog modulation amplitude. The primary
frequency/rate will make up the remaining amplitude. This softkey is
for use with dual-sine modulation only.
For example, if the Tone 2 amplitude is 0%, then there would be no
amplitude for Tone 2; all of the signal strength would be present in Tone
1. If
FM Tone 2 Ampl Percent Of Peak is set to 50%, then Tone 2 and Tone 1
would have equal amplitudes, or half of the amplitude of both tones
combined.
Default Value: 50.0%
Softkey Location:
FM/ΦM > FM Waveform > Dual-Sine >
FM Tone 2 Ampl Percent Of Peak
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