Agilent Technologies 77-4 Guia do Utilizador Página 125

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ESG Family Signal Generators Hardkey and Softkey Reference
Phase Modulation
User’s Guide 4-69
Φ
M Dev Couple Off On
This softkey toggles the
Φ
M deviation coupling on and off. Turning on
Φ
M deviation coupling links the
Φ
M deviation values of
ΦMPath1 and
ΦMPath2. When the values are coupled, any change you make to one
Φ
M deviation value is applied to both
Φ
M deviation values.
Default Value: Off
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM >
ΦM Dev Couple Off On
Φ
M Off On
This softkey toggles the phase modulation on or off for whichever
Φ
M
configuration (
ΦMPath1 or ΦMPath2) you have selected. Notice, however
that although you can turn on phase modulation with this softkey, the
RF carrier is modulated by the enabled modulation only when you have
also set
Mod On/Off to On. Whenever phase modulation is enabled, the Φ
M
annunciator is turned on in the display.
There are two paths for
Φ
M modulation which can be simultaneously
enabled as long as they use different sources (Int, Ext1, or Ext2).
ΦMPath2 is limited to a maximum rate of 1 MHz. ΦMPath2 must be s et
to a deviation less than or equal to
ΦMPath1. The modulation signals
from both paths are summed internally for composite modulation.
Default Value: Off
Softkey Location:
FM/ΦM hardkey > FM ΦM softkey ΦM > ΦMOffOn
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