OPERATION
— DELAY Setting
With conventional oscilloscopes, it is not possible to
observe a trace before triggering signal is developed.
This oscilloscope has " — D E L A Y " function to store a
w a v e f o r m in memory before triggering signal is developed,
thus permitting a wide variety of applications. T h e numbers
indicated by the setting T R I G G E R POINT s w i t c h ( 1 7 ) cor-
respond to the horizontal scale divisions so that trigger
points can be easily checked on the scope.
T h e diagram below s h o w s the — D E L A Y points indicated by
the setting T R I G G E R POINT s w i t c h ( 1 7 ) .
Read-out to Pen Recorder
This oscilloscope permits any high speed traces to be
stored in memory and converted into slow speed time base
which a recorder is able to follow. T h u s , it is possible to
record a memory data in a recorder at a speed suitable to
the recorder's response.
The standard readout speeds are 1 0 m s / w o r d , 2 0 m s / w o r d
and 5 0 m s / w o r d but can be applied to 1 0 0 m s / w o r d ,
2 0 0 m s / w o r d and 5 0 0 m s / w o r d by changing the connec-
tions of the jumper wire in control circuit board (Fig. 2 ) .
T o record a memory data in a pen recorder, perform the
following procedures:
When a trigger point indicated by the setting T R I G G E R
POINT s w i t c h ( 1 7 ) appears on the scale, the oscilloscope
provides a negative delay of up to 9 div. W h e n the
— D E L A Y s w i t c h is " 6 " position, the memory w a v e f o r m is
as s h o w n in Fig. 1 .
Note:
When the — D E L A Y is set for one-shot signal observation,
be sure to press the L E V E L (27) to N O R M A L T R I G G E R
(PUSH) and then press write S T A R T (16)
1 . Operate the digital memory and write input signal in
memory.
2 . Set the D I S P L A Y MODE to D U A L or M E M O R Y .
It may be set to R E A L mode while the F R E E RUN func-
tion is being used.
3 . Connect the pen recorder to the M E M O R Y O U T FOR
PEN.
4 . Set the C L O C K to I N T / P E N .
5 . Depress the S T A R T , and the memory waveform is read
out. T h e readout is completed at 1 0 2 4 words and is set
in the D/A conversion saturating point. T o resume the
readout, depress the S T A R T once again.
Memory w a v e f o r m
T h e left 6 div w a v e f o r m is memory w a v e f o r m ( 6 0 0 words)
before triggered. T h e right 4 div w a v e f o r m is a memory
w a v e f o r m ( 4 0 0 w o r d s ) after triggered.
T h e — D E L A Y setting s w i t c h is used in conjunction w i t h the
scale. W h e n the
—
D E L A Y is set to 6 , the trigger point is the 6 t h
division from the left end of the s c a l e .
Trigger point
1 0
« T R I G G E R P O I N T 6
S L O P E +-
L E V E L P U S H
D I S P L A Y M O D E M E M O R Y
Trigger level
W a v e f o r m b e f o r e t r i g g e r e d
W a v e f o r m a f t e r
t r i g g e r e d
Fig.
1
