Specifications

Programming Guide 2-11
ESG Family Signal Generators Programming Commands and Examples
:AM Subsystem
Using the command :AM[1]|2:INTernal[1]:FUNCtion:SHAPe SWEPtsine allows you to set
the swept-sine amplitude modulation waveform for the
AM Path 1 and AM Path 2
configurations. In this mode you can set the start and stop AM rate and the sweep time.
You can set the signal generator to a single, externally-triggered sweep on either a
negative or positive TTL level or you can choose continuous sweep, triggered immediately.
In this menu you can also select either a positive or negative polarity for the
TRIGGER OUT signal.
*RST Value: Sine
Wideband Amplitude Modulation State
:AM:WIDeband:STATe ON|OFF|1|0
:AM:WIDeband:STATe?
This command sets the operating state of the wideband amplitude modulation source. The
choices are On (1) or Off (0). AM wideband (ESG-D and ESG-DP Series) provides
bandwidth beyond the standard AM with fixed depth (100%). The modulation source is the
I input.
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 burst envelope, 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.
The wideband AM selection (
AM Path WB) eliminates the bandwidth limitations of the ALC
loop thereby increasing the bandwidth beyond that of the standard amplitude modulation.
Typical rates for wideband AM are listed in the technical specifications document. When
you select
AM Path WB in the AM menu, you must apply your modulating signal to the I
input. The sensitivity is 0.5 V = 100% AM depth. With
AM Path WB selected, the modulated
RF signal will be available at the RF OUTPUT connector when you turn on both
Mod On/Off and RF On/Off.
*RST Value: Off