25
f) The original signal waveform is then displayed
together with an "envelope".
g) "XH" denotes that the relevant POSITION
knob (depends on the channel, 16 or 17) can
be used to move the original signal out of the
envelope (the assessment area) to allow bet-
ter signal comparison. "OH" denotes that the
original signal cannot be moved out of the
envelope. As soon as the edge of the envelope
is reached, the Hold function is activated.
h) To reset this function or quit it, simply briefly
press the HOLD button.
(13) Explanation for "MENU" button
The MENU button has been mentioned several
times in connection with the sub-functions
stated above. This button can be used to select
any of the sub-functions below:
ITPL = Interpolation
SMTH = Smoothing
PROB = Probe
AVG = Average
ROLL = Roll function
AMAG = ALT MAG, alternate magnification
G-NG = Go-NoGo, used to set an envelope.
As soon as the MENU button is pressed in stor-
age mode, the LED under the button cap is lit.
The SELECT button located under the MENU
button is a kind of "Help" button and is used to
"set" a sub-function.
13.1 PROBE "probe setting"
Press the MENU button until PROB X1 appears.
Use the "SELECT" button to select either "X1" or
"X10".
P R O B X 1 0
13.2 SMOOTHING
Keep pressing the MENU button until "SMTH
OFF" appears at the top of the screen.
The SELECT button switches the "smoothing
filter" ON or OFF.
S M T H O F F
If smoothing is switched off, a series of dots are
displayed in storage mode rather than con-
tinuous lines. However, if more than five "zero
crossings" of a signal are displayed, it is advisable
to switch smoothing on ( SMTH ON.
13.3 AVERAGING (AVG)
Keep pressing the MENU button until "AVG
NORM" appears at the top of the screen in the
middle. Use the SELECT button to set the "num-
ber" of averaging calculations to be performed.
For example, setting "4" means that a mean-
value will be generated from 4 samples before
the signal waveform is next displayed. The
higher this setting, e.g. 256, the slower the dis-
play is refreshed. This makes it possible, for
example, to acquire non-continuous periodic
signals where there is no trigger.
A V G N O R M
NORM: no averaging
4 : 4 passes
16 : 16 passes
64 : 64 passes
256 : 256 passes
Note:
Averaging is not possible in "ROLL" mode
13.4 "ROLL" mode
Keep pressing the MENU button until ROLL OFF
(or ROLL ON) appears.
Use the SELECT button to switch this operating
mode ON or OFF.
R O L L O N
13.5 Interpolation (ITPL)
Keep pressing the MENU button until ITPL OFF
appears at the top of the screen in the middle.
Use the SELECT button to select sine interpolation
(ITPL SIN), linear interpolation (ITPL LIN) or to
switch interpolation off (ITPL OFF).
I T P L O F F
The INTERPOLATION function is used to "clean
up" the display of horizontally expanded
"reconstituted" signals. In the ITPL SIN position,
"reconstituted" signals are similar to a sinus-
oidal function. However, if a rectangular-pulse
signal is applied to the input and "reconstitu-
ted"/distorted in storage mode, and the ITPL SIN
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