Rigol DSA815 User Manual

RIGOL Chapter 2 Front Panel Operation
User’s Guide for DSA800/E Series
2-24
VBW
Set the desired video bandwidth in order to filter out the noise outside the video
band.
Key Points:
 Reducing the VBW will smooth the spectrum line to differentiate small signals
from noise, but will 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 set to Auto. While in Manual mode, VBW is
not affected by RBW.
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.
Table 2-14 VBW
Parameter Explanation
Default 1 MHz
Range 1 Hz to 3 MHz
Unit GHz, MHz, kHz, Hz
Knob Step
in 1, 3, 10 sequence
Direction Key Step
in 1, 3, 10 sequence
V/R Ratio
Set the ratio of VBW to RBW.
Key Points:
 This value is different while measuring different kinds of signals:
Sine signal: use 1 to 3 (for faster sweeps)
Pulse signal: use 10 (to reduce the influence on the amplitude of transient
signals)
Noise signal: generally use 0.1 (to obtain the average of noises)
 You can modify this parameter using the numeric keys, knob or direction keys.
For more details, please refer to “Parameter Setting”.

Rigol DSA815 Specifications

General

Frequency Range	9 kHz to 1.5 GHz
Input Impedance	50 Ω
Input Connector	N-type female
Weight	4.25 kg
Power Supply	100-240 V AC, 50/60 Hz
Phase Noise	-80 dBc/Hz @ 10 kHz offset
Amplitude Accuracy	±1.5 dB
Display	8 inch LCD (800x480 pixels)
Video Bandwidth (VBW)	1 Hz to 3 MHz
Maximum Input Level	+20 dBm
Interfaces	USB, LAN
Resolution Bandwidth (RBW)	100 Hz to 1 MHz
Dimensions	361 mm x 178 mm x 128 mm