Tektronix 47E5A

I
I
I
I
I
I
I
I
I
Determine the vertical conversion
factor using this
formula :
Vertical
reference signal amplitude (volt)
Conversion
Factor
vertical
VOLTS/DIV
deflection X
switch
(divisions)
setting
Determine the
arbitrary deflection factor using
the
formula :
Arbitrary Vertical
VOLTS/DIV
Deflection Conversion X switch
Factor
Factor setting
To measure the amplitude of an unknown signal. set the
VOL TS / DIV switch to a setting that provides sufficient
vertical deflection to make an accurate measurement . Do
not readjust the VAR VOL TS/DIV control. Measure the
vertical deflection in divisions and calculate the amplitude
of the unknown signal using the following formula:
Signal
Amplitude
Arbitrary
deflection
factor
or
Vertical
X deflection
(divisions)
Signal
Vertical
VOL TS/DIV Vertical
= Convers ion X
Amplitude
Factor
switch X deflection
setting (divisions)
EXAMPLE : The reference signal amplitude measured is
30 volts
with a VOL TS/DIV switch setting of 5 and the VAR
VOL TS/ DIV control adjusted to provide a vertical deflec-
tion of 4 divisions .
Substituting these values in the vertical conversion
factor formula:
Vertical
Conversion
Factor
30
4X5
1.5
Then with a VOL TS/DIV switch setting of 1, the peak-
to-peak amplitude of an unknown signal , 5 divisions high
can be determined by using the signal amplitude formula :
Signal Amplitude: = 1 V X 1.5 X 5 = 7.5 volts .
TIME-DURATION MEASUREMENTS
Obtain a Normal Sweep display . Be sure the VAR
TIME /OIV control is set to the calibrated detent. Set the
TIME/DIV switch for a single event and position the
display to place the time measurement pOints to the center
horizontal graticule line (see Fig. 18).
@
475A/OM44 Operators
37