Modulation Operation
Giga-tronics 2500B Series Microwave Signal Generators
Page 48
Operation Manual, Part Number 34737, Rev C, June 30, 2011
FM Menus
Submenu
Parameter
Figure 24: ΦM External Menu
ΦM Ext Menu
The ΦM External menu allows you to view and modify settings for external phase
modulation mode, which is used when the modulating signal is provided externally.
In external ΦM mode, the RF output signal is modulated by a signal that is applied
to the rear panel FM/
φ
M IN connector.
Items in this submenu that can be modified are:
ΦM
Enables or disables modulation. The active menu, (the menu that is currently
displayed), determines the ΦM mode that is used. Pressing either the adjacent
softkey or the Step Up or Step Down buttons toggle the ΦM state.
Sensitivity
Use to view and modify the external ΦM sensitivity setting, which
determines how much the RF output phase deviates in radians per Volt of signal at
the rear panel FM/
φ
M IN connector.