Accessories Information; First Time Operation; Bal A Djustment - Tektronix 7a11 Instruction Manual

ACCESSOR I ES INF O RM ATIO N
Accessories are su pp lied with
t
he Probe to extend its
operating capabilities. These accessories are shown in Fig .
2-3 and are intended to
b
e
u
tilized as follows:
1 . AC Co upler. Slip-on type contai ning α .015 μF capac-
itor .
B locks DC from Prob e.
H
as a 15 Hz low-frequency -3
dB point. Adds 2.4 pF to inpu t ca p acitance in d icated at
VO LTS/DIV switch .
2.
R
etractable
H
oo k Ti p. Slip-on type for use with or
without AC Co up le r. Add s additional 1 pF inp ut capaci-
ta nce .
H
oo k Tip
b
ody moves toward rear of
P
robe to ex-
pose
h
oo k. Contai ns female-t hreaded ground co nnectio n
fo r use with either α 3 inch
o
r 12 inch screw-in ground lead .
3.
H ook Tip. Slip-on device for use with or without AC
Couple r.
4. Insulati ng Tube. Slip-on
d
evice for insulati ng grou nd
su rface at Pr ob e ti p or AC Coupler ti p.
5.
B
ayonet Ground . Slip-on
d evice fo r use with or with-
out AC Coupler. Spring loaded co n tact permits completi ng
the Probe ground circuit imme diately adjacent to Pr obe
signal input tip.
6. Grounding
L
ead,
N
ose. Slip-on
d
evice wh ich ma kes
co ntact wit h ground surface at Probe or AC Co up ler tip.
Ot h e r end equ ipp ed with 6-32 male thr ea d for attachment
to alligator clip.
7. G rounding
L
ead, Screw-in, 3 inch. Primarily for
u
se
with Retractable
H oo k Tip. Threa d e d
b
oth end s. One end
to
b
e attached to
R
etractable Hook Ti p, other end fo r use
with alligato r clip .
8. G r ou nd ing
L
ead, Screw-in, 12 inch. Threaded
b
ot h
ends .
F
or
u
se between th readed female grounding contact
at Probe and alligator clip . Can also
b
e attac h e d between
grounding female th read at
R
etracta ble
H ook Tip and alli-
gator clip.
10 . 50 Ω Terminatio n/A dapter, G R-to-probe tip. Ca n
be used in any situation requiring 50 Ω probe input im ped-
ance .
11 . Ca b le Assemb ly . Eq uipped with mi n iat u re
telephone- jac k plug, coaxial ca ble, an d alligato r clips.
F
or
use with O FF SET OUT
j
ac k.
9. Alligato r Clip s.
F
or use with grou nding leads.
Ge neral
Operatio n of the 7Α 11 Amplifie r and Probe in α vertical
p
lug-in compartment of an oscilloscope is explained
h
ere.
Operatio n of the unit with
t
he Probe stored is ex plained
first. Th is is followed by α description of operation with
t
he
Probe and its accessories.
P
reliminary
Install the 7 A 1 1 Amplifier into α vertical compartment
of α 7000-Series oscilloscope equ ipped with α time-base
u
nit. Set the equ ipment co ntrols as listed in Ta ble 2-1 .
F
I RST TIME
O
PERATIO N
TABLE 2-1
Preliminary Control Settings
ST EP ΑΤΤΕΝ
B
AL
A
djustment
Operating Instructions -7 Α11
1.
U
si ng the 7Α11 POSITION control, set the trace to
ve rtical center of the graticule . Then dep ress the I NVER T
b
utton and note the trace
p
ositio n .
2.
U si ng the ST EP ΑΤΤΕΝ
B
A L co ntrol, move the trace
to α
p
oint midway betwee n its pr esent
p
osition and
t
he
vertical ce nte r of the graticule.
3. Agai n usi ng the POSITION control, set the trace to
graticule center. Then
d
epress the +UP button and again
n
ote the trace
p
ositio n . It should have
r
emai ned at graticule
center. If
n
ot, agai n adjust ST EP ΑΤΤΕΝ BA L to
p
osition
t
he trace mi dway
b
etween its pr esent position and graticule
ve rtical ce nter.
2-5
7Α11 Am plifier
VO LTS/D 1V .1
POSITION
M idrange
O FF SET OFF
POLARITY
+UP
BANDWIDTH FULL
Time Base
T
riggering
M
ode Auto
Coup li ng AC
Source Int
M
agnifie r Χ1
Ti me/Div 1 ms
V
aria ble Cali brated
Oscilloscope
Intensity an d Focus Adjusted for Optimum Trace
Beam
F
ind e r N o rmal
Cali brator .4 V
Rate 1 kH z