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Press Mode > to access the FM Mode Selection
menu (below).
This menu lets you select the FM operating mode.
Press Locked Low Noise to select the Locked
Low-Noise FM operating mode; press Locked to se
-
lect the Locked FM operating mode; press
Unlocked Narrow to select the Unlocked Narrow
FM operating mode; or press Unlocked Wide to se-
lect the Unlocked Wide FM operating mode. The FM
status display will reflect your selection.
Press < Previous to return to the FM Status menu
display.
Phase
Modulation
Operating
Modes
The MG369XB can provide phase modulation (FM)
of the output signal using modulating signals from
either its internal FM generator or an external
source.
The MG369XB has two FM operating modes—Nar
-
row FM and Wide FM. In Narrow FM mode, the
maximum FM deviation is the lesser of ±3 radians
or ±5 MHz for DC to 8 MHz rates. In Wide FM
mode, the maximum FM deviation is the lesser of
±400 radians or ±10 MHz for DC to 1 MHz rates.
NOTE
FM and FM can not be active simultaneously.
FM and FM share the same rear panel input
connector and internal signal generator.
MG369XB OM 3-101
Local (Front Panel) Operation Signal Modulation
UNLOCKED
When Unlocked Narrow FM or Un-
locked Wide FM is selected ON, this
warning message is displayed on all
menu displays to remind you that
the carrier frequency is not phase-
locked.