HP ESG Series - Ext 2 DC-Coupled; FM; Φ M Normal High BW

5-109
Hardkey and Softkey Reference
Phase Modulation
Ext 2 DC-Coupled
This softkey lets you input an external, DC-coupled, phase modulation signal to
the EXT 2 INPUT connector.
The external 2 input has multiple uses but can be used for only one modulation at
a time. If, for example, you were using the external 2 input in an amplitude
modulation configuration for
AM Path 1, and then you configured ΦMPath2 to
also use the external 2 input, the signal generator would turn off
AM Path 1 and
assign the external 2 input to your
ΦMPath2 configuration. For the purposes of
this discussion, the external 2 AC-coupled input is the same as the external 2
DC-coupled source.
Softkey Location: Press
FM/ΦM hardkey, toggle FM/ΦM softkey to ΦM, press
ΦMSource, Ext 2 DC-Coupled
SCPI Commands:
[:SOURce]:PM[1]|2:SOURce EXTernal2
[:SOURce]:PM[1]|2:EXTernal2:COUPling DC
[:SOURce]:PM[1]|2:EXTernal2:COUPling?
FM/ΦM Normal High BW
This softkey toggles between the menus for FM, normal ΦM, and wideband ΦM.
Normal
ΦM lets you set the phase deviation as high as N x 90 radians with a 3 dB
bandwidth of 100 kHz. Wideband
ΦM provides increased bandwidth while
restricting the maximum deviation to deviation settings up to
π/2 radians (90°).
The modulation bandwidth is typically 6 MHz. For deviation settings between
π/2
and 2
π radians (360°), the modulation bandwidth is typically 1.5 MHz. (These
increased bandwidths are only available using
ΦMPath1. ΦMPath2 is limited to
1MHz.)
Softkey Location: Press
FM/ΦM hardkey, press FM/ΦM softkey once for normal
bandwidth or twice for high bandwidth
Status after Normal Preset: FM
SCPI Commands:
[:SOURce]:PM[1]|2:BANDwidth|BWIDth NORMalHIGH
[:SOURce]:PM[1]|2:BANDwidth|BWIDth?