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Chapter 2 51
Basic Operation
Modulating a Signal
Applying a Modulation Format to the RF Output
The carrier signal is modulated when the Mod On/Off key is set to On, and an individual modulation format is
active.
When the
Mod On/Off key is set to Off, the MOD OFF annunciator appears on the display.When the key is set
to On, the MOD ON annunciator shows in the display, whether or not there is an active modulation format.
The annunciators simply indicate whether the carrier signal will be modulated when a modulation format is
turned on.
To Turn RF Output Modulation On
Press the
Mod On/Off key until the MOD ON annunciator appears in the display.
The carrier signal should be modulated with all active modulation formats. This is the factory default.
To Turn RF Output 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 2-12 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