Keysight E6680A - I Range

3 IQ Analyzer (Basic) Mode
3.1 Complex Spectrum 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
I Range
The internal gain range for the I channel when the Input Path is I Only or I and I/Q.
Used for both the I and Q channels when the Input Path is I+jQ.
Remote
Command
[:SENSe]:VOLTage:IQ[:I]:RANGe[:UPPer] <voltage>
[:SENSe]:VOLTage:IQ[:I]:RANGe[:UPPer]?
Example Set the I Range to 0.5 V Peak
:VOLT:IQ:RANG 0.5 V
:VOLT:IQ:RANG?
Notes The numeric entries are mapped to the smallest gain range whose break point is greater than or equal
to the value, or 1V Peak if the value is greater than 1V
Couplings When "Q Same as I" on page 312 is On, the I Range value will be copied to "Q Range" on page 311
Changing the value also sets Range = Man
Preset Complex SPECtrum Measurement: 0.5 V Peak
All others: 1 V Peak
State Saved Saved in instrument state
Range 1 V Peak (10 dBm @ 50 Ω) | 0.5 V Peak (4 dBm @ 50Ω) | 0.25 V Peak (-2 dBm @ 50Ω) | 0.125 V Peak (-
8 dBm @ 50Ω)
Min 0.125 V
Max 1 V
Annotation The Range annotation replaces the RF Input context's "Atten" annotation
"Rng: <I Range>". When Range = Man the annotation is preceded by "#"
The I Range is not annotated in Input Path Q Only. When I Range and Q Range are the same, the
annotation is "Rng: <Range>". When I Range and Q Range are different and the Input Path is Ind I/Q,
the annotation is "Rng: <I Range>, <Q Range>" and "Peak" is removed from the text. Examples:
IQ Analyzer Mode User's &Programmer's Reference 164