SIGLENT SSA5083A, User Manual, Page: 49 / 260

User Manual 19
analyzer is in Auto mode).
⚫ Generally, the frequency resolution ability is affected by RBW, RBW Filter shape factor, LO
Phase noise, and LO Residual FM.
⚫ RBW varies with the span (non-zero span) in Auto RBW mode.
⚫ Under EMI filter, RBW can only be set to 200 Hz, 9 kHz, 120 kHz and 1 MHz with a 6dB shape
factor.
Command Format [:SENSe]:BWIDth[:RESolution]
[:SENSe]:BWIDth[:RESolution]?
Instruction Specifies the resolution bandwidth. For numeric entries, all RBW types choose
the nearest (arithmetically, on a linear scale, rounding up) available RBW to the
value entered.
Gets the resolution bandwidth.
Parameter Type Discrete
Parameter Range
1Hz
、
3Hz
、
10 Hz
、
30 Hz
、
100 Hz
、
300 Hz
、
1 kHz
、
3 kHz
、
10 kHz
、
30 kHz
、
100 kHz
、
300 kHz
、
1 MHz
、
3 MHz
、
10 MHz
Return Float, unit: Hz
Example :BWIDth 1 kHz
Command Format [:SENSe]:BWIDth[:RESolution]:AUTO OFF|ON|0|1
[:SENSe]:BWIDth[:RESolution]:AUTO?
Instruction Turn on/off auto resolution bandwidth state.
Gets the resolution bandwidth auto state.
Parameter Type Boolean
Parameter Range OFF|ON|0|1
Return 0|1
Example :BWID:AUTO On
3.2.2 Video Bandwidth
Set the video bandwidth in order to filter out the noise outside the video band.
⚫ Reducing the VBW will smooth the trace and helps to highlight small signals from noise, but it
will also increase the sweep time (Sweep Time is affected by a combination of RBW and VBW
when it is in Auto mode).
⚫ VBW varies with RBW when it is in Auto mode. While in Manual mode, VBW is not affected by
RBW.