3 Spectrum Analyzer Mode
3.10 TOI Measurement
NOTE
Significantly faster sweep times are available with Option FS1.
NOTE
The Meas Uncal (measurement uncalibrated) warning appears in the Status Bar
at the bottom of the screen if the manual Sweep Time entered is faster than the
time computed by the instrument’s Sweep time equations, that is, the Auto
Sweep Time. The instrument’s computed Sweep Time provides accurate
measurements; if you sweep faster than this your measurements may be
inaccurate. A Meas Uncal condition may be corrected by returning Sweep Time
to Auto; by entering a longer Sweep Time; or by choosing a wider RBW and/or
VBW.
Remote Command
[:SENSe]:TOI:SWEep:TIME <time>
[:SENSe]:TOI:SWEep:TIME?
Example Set Sweep Time to 1ms:
:TOI:SWE:TIME 1ms
Dependencies In certain instruments without sweeping hardware, such as VXT, this control is grayed-out, and the
Auto/Man toggle disappears
Couplings Coupled to RBW when Sweep Time is set to Auto; in this case the sweep time is changed as RBW
changes, to maintain amplitude calibration
Also coupled to "Video BW" on page 1807. As VBW changes, Sweep Time (when set to Auto) changes
to maintain amplitude calibration. This occurs because of common hardware between the two circuits
Preset Depends on the maximum span of the instrument
State Saved Saved in instrument state
Min 1 ms
Max 4000 s
Annotation The sweep time is displayed in the lower-right corner of the screen. The number of points is displayed
parenthetically, as
Sweep 13.3 ms (1001 points)
A “#” mark appears before “Sweep” in the annotation when it is switched from Auto to Manual
coupling
Status Bits/OPC
dependencies
Meas Uncal is Bit 0 in the STATus:QUEStionable:INTegrity:UNCalibrated register
Auto Function
Remote Command
[:SENSe]:TOI:SWEep:TIME:AUTO OFF | ON | 0 | 1
[:SENSe]:TOI:SWEep:TIME:AUTO?
Example
:TOI:SWE:TIME:AUTO OFF
:TOI:SWE:TIME:AUTO?
Preset
ON
Spectrum Analyzer Mode User's &Programmer's Reference 1837
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