Hardkey and Softkey Reference ESG Family Signal Generators
Phase Modulation
4-70 User’s Guide
Φ
MPath12
Use ΦMPath1 and ΦMPath2 to define two unique phase modulation
configurations. For example, select
ΦMPath1. (ΦMPath1 is the default
after a normal preset. If
ΦMPath1 is not highlighted, press the softkey
once and the selection will toggle from
ΦMPath2 to ΦMPath1.) Configure
the modulation characteristics (such as deviation, source, rate, and
waveform) using the remaining softkeys in the
Φ
M menu. Then enable
Φ
M by setting
ΦMOffOn to On.
To configure a second phase modulation configuration, toggle to
ΦMPath2. Define the modulation characteristics for this second
configuration and enable
Φ
M by setting
ΦMOffOn to On.
The RF carrier is available at the RF OUTPUT connector when you set
RF On/Off to On. Set Mod On/Off to On to modulate the RF carrier with the
modulations that you have enabled.
ΦM Path 1 and ΦM Path 2 are summed internally for composite modulation.
Either path can be switched to any one of the modulation sources: Int,
Ext1, or Ext2. All modulation types can be simultaneously enabled,
except FM with
Φ
M, AM with external burst source, and wideband AM
with I/Q. AM, FM, and
Φ
M can sum simultaneous inputs from any two
sources (Int, Ext1, and Ext2). Any given source (Int, Ext1, or Ext2) can
only be routed to one activated modulation type.
Default Value:
Φ
M Path 1
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM > ΦMPath12
ΦM Rate
Use this softkey to change the internal modulation frequency for the
ΦMPath1 and ΦMPath2 configurations. To change the value, press the
softkey once. The current value for
Φ
M rate 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
Hz or kHz terminator
softkey. The range of values 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.) The minimum increment allowed is 0.1 Hz. Notice that the
new value of ΦM rate applies only to whichever ΦM path configuration
you have currently selected.
Default Value: 400 Hz
Softkey Location:
FM/ΦM hardkey > FM/ΦM softkey ΦM > ΦMRate
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