3 VMA Mode
3.1 Digital Demod Measurement
states (1V Peak, 0.5V Peak, 0.25V Peak, and 0.125V Peak) will vary with Reference Z. Here are some
examples:
50 Ω: 10, 4, -2, -8
75 Ω: 8.2, 2.2, -3.8, -9.8
600 Ω: -0.8, -6.8, -12.8, -18.9
Preset 10.0 dBm
Range -20 dBm to 10 dBm
Min -20 dBm
Max 10 dBm
Q Range
The internal gain range for the Q channel. Q Range only applies to Input Path Q Only
and Ind I/Q. For input I+jQ "I Range" on page 1779 determines both I and Q channel
range settings.
Remote
Command
[:SENSe]:VOLTage:IQ:Q:RANGe[:UPPer] <voltage>
[:SENSe]:VOLTage:IQ:Q:RANGe[:UPPer]?
Example Set the Q Range to 0.5 V Peak:
:VOLT:IQ:Q:RANG 0.5 V
:VOLT:IQ:Q:RANG?
Notes The numeric entries are mapped to the smallest gain range whose break point is greater than or equal
to the value, or 1V Peak if the value is greater than 1V
Q Range is only used for Input Path Q Only and Ind I/Q. For input I+jQ, "I Range" on page 1779
determines both I and Q channel range settings
Couplings When "Q Same as I" on page 1782 is On, the "I Range" on page 1779 value is copied to Q Range and
the range value keys are disabled
Changing the value also sets Range = Man
Preset 1 V Peak
State Saved Saved in instrument state
Range 1 V Peak (10 dBm @ 50Ω) | 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: <Q Range>". When Range = Man the annotation is preceded by "#"
The Q Range is not annotated in Input Path I Only or I+jQ. 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:
"Rng: 1 V Peak" the Q Range is 1 V Peak
Vector Modulation Analyzer Mode User's &Programmer's Reference 252
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