60 Chapter 3
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 3-4 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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