5-39
Hardkey and Softkey Reference
FM
FM Off On
This softkey toggles the frequency modulation on or off for whichever FM path
configuration (
FM Path 1 or FM Path 2) you have selected. Notice, however that
although you can turn on frequency 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 frequency modulation is enabled, the FM annunciator is turned on
in the display.
There are two paths for FM modulation which can be simultaneously enabled as
long as they use different sources (Int, Ext1, or Ext2).
FM Path 2 is limited to a
maximum rate of 1 MHz.
FM Path 2 must be set to a deviation less than or equal to
FM Path 1. The modulation signals from both paths are summed internally for
composite modulation.
Softkey Location: Press
FM/ΦM, FM Off On
Status after Normal Preset: Off
SCPI Commands:
[:SOURce]:FM[1]|2:STATe ON|OFF|1|0
[:SOURce]:FM[1]|2:STATe?