A N Y I N D I V I D U A L A D D R E S S O R F U N C T I O N
D A T A B I T M A Y B E P O S I T I V E O R N E G A T I V E
D E P E N D I N G U P O N T H E C O D E D I N P U T
S U B = D I S T O R T I O N
A D J U S T P O S I T I O N C O N T R O L S T O
S U P E R I M P O S E W A V E F O R M S D I R E C T L Y
O V E R E A C H ' O T H E R
F i g . 10 Distortion measurement
T3
Fig.
9
Family of time-related waveforms from typical digital circuit in Fig.
8
Distortion M e a s u r e m e n t :
An amplifier stage or an entire amplifier unit may
be measured for distortion with this oscilloscope.
This type of measurement is especially variable
when the slope of a waveform must be faithfully
reproduced by an amplifier. F i g . 1 0 shows the
testing of a circuit using a triangular wave, such as
is typically encountered in the recovered audio out-
put of limiting circuit w h i c h procedes the
modulator of transmitter. The measurement may
be made using any type of signal; merely use the
type of signal for testing that is normally applied to
the amplifier during normal operation. T h e
procedure for distortion testing is as follows.
A D J U S T T O B O T H
W A V E F O R M S A R E
S A M E A M P L I T U D E
A M P
No.
1
A M P
No.
2
