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ESG Family Signal Generators Hardkey and Softkey Reference

Phase Modulation

User’s Guide 4-75

Ext 1 AC-Coupled

This softkey lets you input an external, AC-coupled, phase 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

ΦMPath2 to also use the external 1 input, the signal

generator would turn off

AM Path 1 and assign the external 1 input to

your

ΦMPath2 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 hardkey > FM ΦM softkey ΦM > ΦM Source >

Ext 1 AC-Coupled

Ext 1 DC-Coupled

This softkey lets you input an external, DC-coupled, phase modulation

signal to the EXT 1 INPUT connector.