ESG Family Signal Generators Hardkey and Softkey Reference
AM
User’s Guide 4-3
AM Off On
This softkey enables the amplitude modulation for whichever AM path
configuration you have selected,
AM Path 1, AM Path 2, or AM Path WB, in the
case of a digitally equipped model. Notice, however, that although you can
enable amplitude 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 amplitude modulation is enabled, the AM
annunciator is turned on in the display.
There are two paths for AM modulation which can be simultaneously
enabled as long as they use different sources (Int, Ext1, or Ext2). The
modulation signals from both paths are summed internally for
composite modulation.
Default Value: Off
Softkey Location:
AM > AM Off On
AM Path 1 2 WB
NOTE For the ESG-A and ESG-AP series, this softkey is AM Path 1 2. Wideband
AM is not available on the ESG-A and ESG-AP series.
Use
AM Path 1 and AM Path 2 to define two unique amplitude modulation
configurations. For example, select
AM Path 1. (AM Path 1 is the default
after a normal preset. If
AM Path 1 is not highlighted, press the AM
Path 1 2 WB
softkey until the selection toggles to AM Path 1.) Configure the
modulation characteristics (such as depth, source, rate, and waveform)
using the remaining softkeys in the AM menu. Then enable AM by
setting
AM Off On to On.
To configure a second amplitude modulation configuration, toggle to
AM Path 2. Define the modulation characteristics for this second
configuration and enable AM by setting
AM Off On to On.
The RF carrier is available at the RF OUTPUT connector when you set
RF On/Off to On. Set Mod On/Off to On to modulate the RF carrier with the
modulations that you have enabled.
AM Path 1 and AM Path 2 are summed internally for composite modulation.
Either path can be switched to any one of the modulation sources: Int,
Ext1, or Ext2. All modulation types can be simultaneously enabled,
except FM with ΦM, AM with external burst source, and wideband AM
with I/Q. AM, FM, and ΦM can sum simultaneous inputs from any two
sources (Int, Ext1, and Ext2). Any given source (Int, Ext1, or Ext2) can
only be routed to one activated modulation type.
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