Specifications

2-8 Programming Guide
Programming Commands and Examples ESG Family Signal Generators
:AM Subsystem
*RST Value: Off
Amplitude Modulation Depth
:AM[1]|2[:DEPTh] <val><unit>
:AM[1]|2[:DEPTh]?
This command sets the depth of amplitude modulation.
This command is used to set the amplitude modulation depth, in percent, for the
AM Path 1
and
AM Path 2 configurations. The choices for the variables <val> and <unit> may range
from 0.1 PCT to 100 PCT. After executing the command, the current value for AM depth is
displayed in the active entry area. The minimum increment allowed is 0.1%. Notice that
the new value of AM depth applies only to whichever AM path configuration (
AM Path 1 or
AM Path 2) you have currently selected.
*RST Value: 0.1%
Amplitude Modulation Depth Coupling
:AM[1]|2[:DEPTh]:TRACk ON|OFF|1|0
:AM[1]|2[:DEPTh]:TRACk?
This command links the AM depth values of
AM Path 1 and AM Path 2 and allows the
amplitude modulation depth values on both path 1 and path 2 to track each other. If the
AM depth coupling function is activated, changing the AM depth on path 1 will cause an
equal change in AM depth on path 2, and visa versa. The choices are On (1) or Off (0).
*RST Value: Off
External Amplitude Modulation Source Coupling
:AM[1]|2:EXTernal[1]|2:COUPling AC|DC
:AM[1]|2:EXTernal[1]|2:COUPling?
This command sets the external coupling for the amplitude modulation source, if External
was selected as the AM[1]|2:SOURCe. The choices are AC or DC coupling. This command
does not change the currently active source, nor does it switch the current modulation on
or off. The modulating signal may be the sum of several signals, either internal or external
sources. If the coupling is set to DC, then both the AC and DC signal components pass.
AC coupling passes only AC signal components.
The command :AM[1]|2:EXTernal[1]|2:COUPling AC lets you input an external,
AC-coupled, amplitude modulation signal to the EXT 1 INPUT connector. The modulation
signal is tested for voltage and a display annunciator will report a high or low condition if
the voltage is >
±3% of 1 Vpk.
The command :AM[1]|2:EXTernal[1]|2:COUPling DC lets you input an external,
DC-coupled, amplitude modulation signal to the EXT 1 INPUT connector.
The external 1 source has multiple uses but can be used for only one modulation at a time.
If, for example, you were using the external 1 source in a frequency modulation
configuration for
FM Path 1, and then you configured AM Path 2 to also use the external 1