Tektronix 570, Manual

Page: 24 / 134

ST ART ADJUST
o
0
o
Fig.
2-4.
The affect the ST
A
R
T ADJUST
Control has on the grid- step waveform.
o -1 -2 -3 -4 -5 -6 -7 -8
Control Settings for Triode section
of a 6U8
PEAK VOLTS
SER IES LOAD
STEPS/SEC
VOLTS/STEP
START ADJUST
PLATE -GRID
PLATE -SCREEN-GRID
MA/DIV
VOLTS/DIV
300
50k
240
1
o
PLATE
PLATE
.5
SO
.5MA/D IV
ov
V
-
5
OLTS/DI Ep
Ep
Il"
Eg"
I
Ip
l
Ep
rp=
T
1
Eg
i
Fig .
2-5.
Plate Current vs. Plate Voltage curve for the triode section of a
6US.
Grid Current
vs.
Plate Voltage
the PL A TE-SCREEN-G RID Control to GRID.
Grid current c an be plotted ag ainst plate
volt age by s etting the controls as for the plate
c urrent versus plate voltage display and moving
Incre ase the vertical sensitivity with the VER T-
1cAL MA/DIV switch as required. Normally the
grid current will not be me asurable until the
grid approaches zero bias or goes positive.
2 - 6
O per ating Instructions - Type
570
AA