Keysight 81150A - Modulating Depth

Appendix
186
3.7.6 Modulating Depth
Introduction
The modulation depth is expressed as a percentage and represents the
extent of the amplitude variation. At 0% depth, the output amplitude is half
of the selected value. At 100% depth, the output amplitude equals the
selected value.
Modulation depth: 0% to 120%. The default is 100%.

 Even at greater than 100% depth, the 81150A / 81160A will not
exceed the specified amplifier’s output voltage window or specified
output amplitude.
 The modulation depth setting is only used when DSSC is disabled.
Modulating Depth
Characteristics
If you select the External modulating source, the carrier waveform is
modulated with an external waveform. The modulation depth is controlled by
the ±2.5V/±5V signal level present on the rear-panel Modulation In
connector. For example, if you have set the modulation depth to 100%, then
when the modulating signal is at +2.5V/+5V, the output will be at the
maximum amplitude. When the modulating signal is at -2.5V/-5V, then the
output will be at the minimum amplitude.

 The 81160A offers a fix ±2.5V input range. The 81150A offers a
selectable ±2.5V or ±5V input range.
Front-Panel
Operation
After enabling AM, press the AM Depth softkey. Then use the knob or
numeric keypad to enter the depth.
Remote Interface
Operation
:AM[1|2]:DEPTh{<depth
in percent>|MINimum|MAXimum}