Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.13 Phase and Amplitude vs Time Measurement
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
Range Auto/Man
The Auto setting for Range causes the range to be set based on the Y Scale settings.
When Range is Auto, the I & Q Range are set based on the top of the Y Scale when
the Y scale is in dB units (for example, power), or to the max(abs(top), abs(bottom))
when the Y scale reference is not at the top of the screen.
Not all measurements support Range Auto/Man. If Auto is not supported in the
current measurement, this control is grayed-out, displaying Man, and MAN is
returned to a SCPI query, but this does not change the Auto/Man setting for Range.
When you switch to a measurement that supports Auto, it goes back to Auto if it was
previously in Auto mode.
Remote Command
[:SENSe]:VOLTage:IQ:RANGe:AUTO OFF | ON | 0 | 1
[:SENSe]:VOLTage:IQ:RANGe:AUTO?
Example Put the I Range and Q Range in manual
:VOLT:IQ:RANG:AUTO OFF
:VOLT:IQ:RANG:AUTO?
Dependencies If Auto is not supported, sending the SCPI command generates an error
Couplings When in Auto, both I Range and Q Range are set to the same value, computed as follows:
Maximum absolute value is computed for the Y Scale. The top and bottom of the graph are computed
based on Ref Value, Scale/Div, and Ref Position. Formula: YMax = max(abs(top), abs(bottom))
The I Range and Q Range are then set to YMax
Preset
ON
State Saved Saved in instrument state
Annotation When in Man, the Range annotation is preceded by "#"
This is an alternate form of the command to match the POWer form of the I Range
and Q Range SCPI.
Spectrum Analyzer Mode User's &Programmer's Reference 1971

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)