Atten AT7016, Руководство пользователя

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AT7016 User Manual
11
4.2.2 DC VOLTAGE MEASUREMENT
STEP:
(1) Setup front panel connector to obtain a sweep baseline on the screen.
(2) Setup input coupling options as “ ⊥ ”.
(3) Setup POSITION, let sweep baseline to coincide with horizontal center, define it as
the zero reference level.
(4) Input signal into terminal.
(5) Set input coupling to “DC”, adjust VOLTS/DIV, so that the waveform is shown centrally on the
screen, turn VAR to the calibration position.
(6) Read the divisions between the zero reference level to the waveform from the test input.
(7) Calculate the DC voltage:
V= divisions on vertical axis × sensitivity × dir/-)
Shown in Figure 4-4, zero reference level at the center, use 10:1probe, sensitivity is 2V/Div, 2
points as A & B, A is 1.5 Div. over the zero reference level, B is 3Div. below the zero reference
level. DC voltage level of the 2 points are :
VA = 1.5 x 2 x (+) = 3 V VB = 3 x 2 x (-) = -6 V
Fig 4-4
4.3 TIME MEASUREMENTS
4.3.1 TIME SPACE MEASUREMENTS
This is a procedure for making time (period) measurements between two points on a waveform:
(1) Connect the signal to be measured to the input terminal [19].
(2) Adjust level to obtain steady waveform.
(3) Turn VAR clockwise to the calibration position, and set sweep controls to obtain a normal
display of 1-2 signal cycles.
(4) Using the vertical and horizontal positions, set two points to be measured in the waveform on
the same horizontal level.
(5) Measure the distance between the two points , the measurement is calculated by the following
equation:
Distance between 2 points (DIV)
×
rate of sweep (t/Div)
TIME (S) = --------------------------------------------------------------------
B
A
Zero-volt
Reference
Level
Level