Tektronix 2335, Instruction Manual, Page: 54 / 104

o v
L J L
/ T 7
i
POSITIVE LE VE L
X
i
0 ■..
1 __ '
1
i_
J
ov-
NEGATIVE OFFSET
j
l —
w • •
I
!
/ -
y -
y
1
(A) CHANNEL 1 SIGNAL
WITH 3 DIVISIONS OF
POSITIVE DC LEVEL.
(8) CHANNEL 2 DISPLAY
WITH 3 DIVISIONS OF
NEGATIVE OFFSET.
1C} RESULTANT DISPLAY
4 6 5 / D M - 0 - 1 9
Figure 14. Algebraic addition.
Common-Mode Rejection
The ADD mode can also be used to display signals that
contain undesirable frequency components. These undesir­
able components can be eliminated through common-mode
rejection. The precautions given under the preceding
"Algebraic A d d itio n " procedure should be observed.
EXAMPLE: The signal applied to the Channel 1 input
connector contains unwanted ac-input-power-source
frequency components (see Figure 15A). To remove the
undesired components, use the following procedure:
1. Preset instrument controls and obtain a Normal
Sweep Display.
2335 Operators
41