
46 Chapter 2
Basic Operation
Modulating the Carrier Signal
Modulating the Carrier Signal
The carrier signal is modulated when the Mod On/Off key is set to on and a modulation format
is active. When the key is set to on, the MOD ON annunciator shows in the display. The MOD OFF
annunciator appears when the key is set to off. The MOD ON annunciator may be showing even
when there are no active modulation formats. This just indicates that the carrier signal will
be modulated when a modulation format is turned on.
To Turn the Modulation On
Press the Mod On/Off key until the MOD ON annunciator appears in the display.
The carrier signal is now modulated with all active modulation formats. This is the factory
default.
To Turn the Modulation Off
Press the Mod On/Off key until the MOD OFF annunciator appears in the display.
The carrier signal is no longer modulated or capable of being modulated when a modulation
format is active.
Figure 2-4 Carrier Signal Modulation Status
Mod set to On—Carrier is Modulated
AM Modulation Format is Active
AM Modulation Format is Active
Mod set to Off—Carrier is
not Modulated
Mod set to On—Carrier is
not Modulated
No Active Modulation Format
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