ADInstruments DSA2016TG, Руководство пользователя

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Key Points:
• Reduce VBW can make the spectral line be smooth, and the small signal which is submerged
in noise can stand out. But the scan time will be longer. (When scan time is automatic, it is
influenced by RBW and VBW together).
• When VBW is automatic, it changes with RBW. But it is not influenced by RBW when
manually.
• You can use numeric keys, knobs or direction keys to modify this parameter. The detail
method refers to the specification in “Parameter Setting”.
VBW Reference
Parameter Instruction
Default 1 MHz
Range 1 Hz to 1 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 and RBW.
Key Points:
• Choose the ratio according to different signals:
• When measure sine signals, normally choose 1~3 (to get shorter scan time). When measure
pulse signals, choose 10 (to reduce the influence to the amplitude of nstantaneous signal).
When measure noise signals, normally choose 0.1 (to get the average value of noise).
• You can use numeric keys, knobs or direction keys to modify this parameter. The detail
method refers to the specification in “Parameter Setting”.
V/R Ratio Reference
Parameter Instruction
Default 1 MHz
Range 0.000001 ~ 30000
Unit N/A
Knob Step in 1, 3, 10 sequence
Direction Key Step in 1, 3, 10 sequence
3.2.2 Sweep
Set parameters about the Sweep and Trigger functions, including Time, Auto SWT, Mode,
Numbers, Trigger type, etc.
Mode
Set the sweep mode to “Single” or “Continue”, the default is “Continue”. The corresponding icon of
the sweep mode will be displayed in the status bar at the left side of the screen.
1. Single
Set the sweep mode to “Single”. The number 10 on the parameter icon denotes the current sweep