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3 VMA Mode

3.1 Digital Demod Measurement

Mixer Lvl Offset

This is an advanced setting to adjust target Range at the input mixer, which in turn

affects the signal level in the instrument’s IF. This setting can be used when

additional optimization is needed after setting "Peak-to-Average Ratio" on page

1784. Positive values of offset optimize noise performance over distortion, negative

values optimize distortion performance over noise.

Remote Command

[:SENSe]:POWer[:RF]:RANGe:MIXer:OFFSet <real>

[:SENSe]:POWer[:RF]:RANGe:MIXer:OFFSet?

Example

:POW:RANG:MIX:OFFS -5 dB

Preset 0dB

State Saved Saved in instrument state

Min

VXT Models M9410A/11A -34dB

All Others -35dB

Max 30dB

3.1.4.4 Range (Baseband Input models)

Only available when Option BBA is present (I/Q Baseband Inputs), the current

measurement supports option BBA, and I/Q is the selected input. In these cases,

replaces the Attenuation tab.

Each input channel (I and Q) has four internal gain ranges. The maximum allowed

voltage in each gain range is slightly more than the nominal value, so the break

point between ranges is a few millivolts higher than the nominal (setting a peak

voltage of 0.502mV will still map to the 0.5V Peak range).

Gain Setting Volts RMS Volts Peak Volts Peak - Peak dBm (50Ω ) Break Point

0 dB 0.7071 1.0 2.0 10 n/a

6 dB 0.3536 0.5 1.0 4 0.502 V Peak

12 dB 0.1768 0.25 0.5 -2 0.252 V Peak

18 dB 0.0884 0.125 0.25 -8 0.127 V Peak

Dependencies Available only when the selected input is I/Q. If the current measurement does not support baseband

inputs, an error will be displayed: “No result; Meas invalid with I/Q inputs”

State Saved No

249 Vector Modulation Analyzer Mode User's &Programmer's Reference

Keysight x-series Programmer's Reference

Other manuals for Keysight x-series