3 VMA Mode
3.6 Occupied BW Measurement
Min 1 Hz
Max 8 MHz is the max equivalent –3dB RBW, which means that the named RBW (the one shown on the
control etc.) can exceed 8MHz if using a filter other than –3dB Gaussian
Annotation A “#” mark appears before “RBW” in the annotation when it is switched from Auto to Manual coupling
Backwards
Compatibility
Notes
For backwards compatibility, this command supports both BANDwidth and BWIDth forms
For ESA, the maximum Res BW was 5 MHz; for X-Series it is 8 MHz
RBW Presets
Unless noted in the table below, the Preset value of RBW is Auto.
Mode Preset Value
WCDMA 30 kHz
BT 10 kHz
WLAN 100 kHz
MSR 30 kHz
LTE, LTETDD, LTEAFDD, LTEATDD, 5G NR 30 kHz
Video BW
Lets you change the instrument post-detection filter (VBW or “video bandwidth”)
from 1Hz to 8MHz, in approximately 10% steps. In addition, a wide-open video
filter bandwidth may be chosen by selecting 50MHz. The VBW is annotated at the
bottom of the display, in the center.
Video BW (Auto) selects automatic coupling of Video BW to "Res BW" on page 985.
To decouple the resolution bandwidth, press the Auto/Man toggle on the Video BW
control, or simply enter a different value for Video BW.
When Video BW is manually selected, it may be returned to the coupled state by
pressing the Auto/Man toggle on Video BW. This may also be done by pressing
"Auto Couple" on page 1825 or by performing a Preset.
Remote Command
[:SENSe]:OBWidth:BANDwidth:VIDeo <bandwidth>
[:SENSe]:OBWidth:BANDwidth:VIDeo?
[:SENSe]:OBWidth:BANDwidth:VIDeo:AUTO ON | OFF | 1 | 0
[:SENSe]:OBWidth:BANDwidth:VIDeo:AUTO?
Example
:OBW:BAND:VID 2.4 MHz
:OBW:BAND:VID?
:OBW:BAND:VID:AUTO ON
:OBW:BAND:VID:AUTO?
Vector Modulation Analyzer Mode User's &Programmer's Reference 986
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