Tektronix 2337, Инструкция по эксплуатации

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CH 1 SIGNAL
WITH UNWANTED
LINE FREQUENCY '«
COMPONENT *
CH 2 SIGNAL ,,
FROM LINE
FREQUENCY
SOURCE
(INVERTED)
tot
9C
SIGNAL WITH
LINE FREQUENCY
COMPONENT
CANCELED
OUT
K
.-*r
* —
>
y
S
*
*— *•»
\
\
>
__
r
....
(A) CH 1 AND CH 2 SIGNALS.
....
' 1 .
__ „ __
....
(8) RESULTANT SIGNAL. 173S-19
2. Apply the signal containing the unwanted line-
frequency components to the Channel 1 input.
3. A pply a line-frequency signal to the Channel 2 input.
4. Select A L T VE R TIC A L MODE and press in the
CH 2 INVERT push button.
5. Adjust the Channel 2 VO LTS/D IV switch and VAR
control so that the Channel 2 display is approxi­
mately the same amplitude as the undesired portion
o f the Channel 1 display (see Figure 16A).
6. Select ADD VE R TIC A L MODE and slightly readjust
the Channel 2 VO LTS/DIV VAR control fo r maxi­
mum cancellation o f the undesired signal component
(see Figure 16B).
Time Duration
To measure time between tw o points on a waveform, use
the following procedure:
1. Preset instrument controls and obtain a Normal
Sweep Display.
2337 Operators
@
46
Figure 16. Common-mode rejection.