ESG Family Signal Generators Hardkey and Softkey Reference
FM
User’s Guide 4-23
Ext
This softkey is one of the choices in the FM Sweep Trigger menu.
Choosing
Ext allows you to trigger swept-sine frequency modulation
using a signal applied to the TRIGGER IN rear panel connector. Set the
polarity of the trigger signal using the
Trigger In Polarity Neg Pos softkey.
Softkey Location:
FM/ΦM > FM Waveform > Swept-Sine > FM Sweep Trigger >
Ext
Ext 1 AC-Coupled
This softkey lets you input an external, AC-coupled, frequency
modulation signal to the EXT 1 INPUT connector. The modulation
signal is tested for voltage and a display annunciator will report a high
or low condition if the voltage is >
±
3% of 1 Vpk.
The external 1 input has multiple uses but can be used for only one
modulation at a time. If, for example, you were using the external 1
input in an amplitude modulation configuration for
AM Path 1, and then
you configured
FM Path 2 to also use the external 1 input, the signal
generator would turn off
AM Path 1 and assign the external 1 input to
your
FM Path 2 configuration. For the purposes of this discussion, the
external 1 AC-coupled input is the same as the external 1 DC-coupled
source.
Softkey Location:
FM/ΦM > FM Source > Ext 1 AC-Coupled
Ext 1 DC-Coupled
This softkey lets you input an external, DC-coupled, frequency
modulation signal to the EXT 1 INPUT connector.
The external 1 input has multiple uses but can be used for only one
modulation at a time. If, for example, you were using the external 1
input in an amplitude modulation configuration for
AM Path 1, and then
you configured
FM Path 2 to also use the external 1 input, the signal
generator would turn off
AM Path 1 and assign the external 1 input to
your
FM Path 2 configuration. For the purposes of this discussion, the
external 1 AC-coupled input is the same as the external 1 DC-coupled
source.
Softkey Location:
FM/ΦM > FM Source > Ext 1 DC-Coupled
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