Tektronix 2335, Instruction Manual, Page: 52 / 104

10. Set the A SEC/D1V switch to a position that displays
several cycles o f the signal.
11. Measure the divisions o f vertical deflection between
the reference line and the desired point on the waveform
at which the dc level is to be determined (see Figure 13).
Figure 13. Instantaneous voltage measurement.
12. Calculate the instantaneous voltage, using the follow ­
ing formula:
Instantaneous
Voltage
vertical
deflection
(divisions)
polarity
(+ or - }
VO LTS/DIV
x switch x
setting
probe
attenuation
factor
EXAMPLE: The measured vertical deflection from the
reference line is 4.6 divisions (see Figure 13), the wave­
form is above the reference line, the VO LTS/D IV switch
is set to 2, and a 10X attenuator probe is being used.
Substituting the given values:
Instantaneous Voltage = 4.6 div x (+1) x 2 V/div
x 10 = 92 V.
Algebraic Addition
W ith the VER TICAL MODE switch in the ADD posi­
tion, the waveform displayed is the algebraic sum o f the
signals applied to the Channel 1 and Channel 2 inputs
2335 Operators
39