Operat i ng I nstructions-5812N
Example: Fig.
' ·3
sh ows a complex waveform d isplayed
on the A sweep. The i nd icated pulse cannot be v i ewed in
any greater detail because th e sweep is triggered by the
larger ampli tud e pulses at th e start of the d i splay, and a
faster sweep rate moves th is area of th e waveform off the
v i ewing area. The second waveform sh ows the area of
i n terest magnif i ed 1 00 t i mes usi ng the delayed sweep . T h e
D E LAY T I M E MU L T dial has been ad justed so the delayed
sweep starts just before the area of interest.
Pulse Jitter Measurements
In some applicati ons, it is necessary to measure the
amount of jitter on the lead ing edge of a pulse, or j i tter
between pulses.
1 . Apply a signal to the i nput connectors of both verti ·
cal plug·in u nits. Push in both the A and B buttons of the
M O D E switch to establish a dual ·sweep display . Set the
Volts/Div sw itches to produce d isplays about fou r divisions
in amp l i tude.
2. Set the A S E CO N DS/D I V swi tch to a cali brated
sweep rate wh ich d isplays th e complete waveform . Adjust
the A Triggering controls for a stab le d isplay .
3 .
Push in t h e A I N T E N · B D L Y 'D button and pos i t ion
the start of the intensified portion with the D E LA Y T I M E
MU LT dial to the pulse to be measured . Set t h e B
S E CO N DS/D I V switch to a setting that i ntensifies th e full
portion of the pulse of interest.
4. Pulse j i tter is shown by h o r i z ontal movement of the
pulse
( take
into account inherent jitter of De layed Sweep ;
F ig.
'·4.
Measuring pulse jitter
.
1 -9
see Electrical Characteristics! . Measure the amou nt of hori·
zontal movement, then multiply th is d i stance by the B
SECO N D S/D I V swi tch setting to obtain pulse jitter in time.
Example : The horizontal m ovement show n in Fig. 1 -4 is
0.5 division, and th e B S ECO N D S/D I V swi tc h set t i ng is 0 . 2
J.l. s . F rom th e formula given in step 4 :
Pulse J itter
=
0.5 (d ivisions)
X
0.2 J.l.s (B S ECO N DS/D I V
sett i ng )
=
0. 1 0 J.l.s.
The pulse j i tter is 0 . 1 microsecond .
E L ECTR ICAL C H A R ACT E R IST I CS
Performance Cond itions
The following ch aracterist i cs apply when the 5B 1 2 N is
operating with in the envi ronment descri bed in the 5 1 00·
Series Osc i lloscope System manual. In add i t i on , the 5B 1 2 N
must have been calibrated at an ambien t temperature
b20° C and +30° C.
I n t h i s manual the word V olts/ D iv or division refers to
major graticule div i s i o n .
A
Sweep R ate
CA L I B R ATED R A N G E : 5 s/di v to , J.l.s/d i v in a
2 1
step , ' ·2·5 sequence .
X
1 0 magnifier extends sweep rate to
1 00 ns/div.
D I SP LAY ED ACCUR ACY : W i t h i n
3%
from 1 J.l.s/div to
s/div . W i thin 4% from 2 s/d i v to 5 s/d i v . ( Add 1 % to
magnif i ed sweep. )
U N C A L I B R ATED
( V A R I A B L E )
R A NG E : Conti no
uously variable between steps and to 1 2 . 5 s/div .
B
Sweep Rate
CA L I B R AT ED R A N G E : 0.5 s/div to 0.2 J.l.s/div in a 20
step . ' ·2 · 5 sequence .
D I SP LAY E D ACCU R A CY : W i t h i n
3%
from 1 J.l.s/d iv
to 0. ' s/div. W i t h i n 4% at 0 . 2 J.l. s/d iv. 0.5 J.l.s/d i v. 0 . 2 s/div
and 0 . 5 s/d i v.
Position Range
Any port i on of the sweep can be p osi tioned on screen .
Sweep Delay
D E L AY T I M E M U LTI P L I E R R A N G E : 0.2 to 1 0. 2 t i mes
the A SECO N DS/ D I V setting ( continuously variable from 1
J.l. S to 50 s) .
Summary of Contents for 5B12N
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