UNI-T UTS3000B/A Series User Manual page 45

4. Edit Correction:
Select
Go To row
Insert row
Delete row
Delete Correction
5. Delete All: Remove all the saved revised data.
BW
Press [BW] key to enable the resolution bandwidth function, enter panel menu to control the
resolution bandwidth and video bandwidth.
RBW（Auto/Man）: Set the resolution bandwidth to distinguish two signals with similar frequency. In
manual mode, the user can change the resolution bandwidth value within the range 1Hz to 3MHz by
using the numeric key, rotary knob, direction key or touch panel menu.
Below to 1kHz, the optional bandwidth value are 1Hz, 3Hz, 10Hz, 30Hz, 100Hz or 300Hz. If the input
value is not one of these values, then select an available bandwidth value which closest to the input
value. As the resolution bandwidth decreases, the system corrects the sweep time to maintain the
calibration of the amplitude. The resolution bandwidth is also related to the sweep span, when the sweep
span is reduced, the resolution bandwidth is also reduced.
In auto-coupling mode, the video bandwidth changes along with the resolution bandwidth, thus the ratio
of the resolution bandwidth and the video bandwidth stay constant.
If the video bandwidth and resolution bandwidth are not coupled, a "#" mark will appear in the bottom left
corner of the screen next to "RBW". Press auto key to re-couple.
VBW （Auto/Man） : Set the video bandwidth to filter out ambient noise. In manual mode, user can change
the instrument's video bandwidth value from 1 Hz to 3 MHz by using the numeric key, rotary knob,
direction key or touch panel menu. If the input value is not an available bandwidth value, then select an
available bandwidth value which closest to the input value. As the video bandwidth decreases, the
system increases the sweep time to maintain calibration of the amplitude.
When the video bandwidth and resolution bandwidth are not coupled, a "#" mark will appear at the
bottom of the screen next to "VBW". Press auto key to re-couple.
VBW: 3dB RBW: Select the ratio of video bandwidth to resolution bandwidth. If the signal is similar to
the noise level and the signal response displayed on the screen is blurred, the ratio can be set to less
than 1 to reduce the noise. When reset with [Default], the ratio is set to 1.000. User can change the ratio
by using the numeric key, rotary knob, direction key or touch panel menu.
Provide 10 correction factors to save,
the default: correction 1
Select number of revised row
Add revised point
Delete select row at the current
Delete Corrected data at the current
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