Hardkey and Softkey Reference ESG Family Signal Generators
Phase Modulation
4-78 User’s Guide
Square
This softkey lets you to specify square as the phase modulation
waveform for the
ΦMPath1 and ΦMPath2 configurations. Notice that the
selected waveform applies only to whichever
Φ
M path configuration you
have currently selected.
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM > ΦM Waveform >
Square
Swept-Sine
Pressing this softkey reveals a menu of choices for setting the
swept-sine phase modulation parameters. In this menu you can set the
start and stop
Φ
M rate and the sweep time. You can set the signal
generator to a single, externally-triggered sweep on either a negative or
positive TTL level or you can choose continuous sweep, triggered
immediately. In this menu you can also select either a positive or
negative polarity for the TRIGGER OUT signal.
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM > ΦM Waveform >
Swept-Sine
Triangle
Specifies triangle as the frequency modulation waveform for the
ΦMPath1 and ΦMPath2 configurations. Notice that the selected
waveform applies only to whichever
Φ
M path configuration you have
currently selected.
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM > ΦM Waveform >
Triangle
Trigger In Polarity Neg Pos
Toggles between a negative TTL level trigger (0 V) and a positive TTL
level trigger (+5 V) for externally triggering swept-sine phase
modulation.
This softkey is coupled to the
Trigger In Polarity Neg Pos softkey for
swept-sine AM, FM, and LF Out, and to the
Ext Neg and Ext Pos sweep
trigger selections in the Sweep/List Menu. If you set the
Trigger In Polarity Neg Pos softkey in the ΦM Swept-Sine Menu to Neg, the
Trigger In Polarity Neg Pos softkey is also set to Neg for swept-sine AM, FM,
and LF Out. And, in addition, if the step or list sweep trigger is set to
Ext Pos, the trigger selection will automatically be changed to Ext Neg.
The same softkeys will toggle to
Pos or to Ext Pos if you select Pos in the
Swept-Sine ΦM Menu.
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