Gain - Tektronix 7A16A Instruction Manual

Calibration-7A 16A
3 . Insert t
h
e
time b ase unit into t
h
e cali
b
ration ε . R eturn t
h
e V O
L TS/D I
V
switc
h
to 5 m
V
.
oscilloscop e H orizontal com
p
artme
n
t .
4 . Turn oscillosco
p e on and allow 20 minutes warm-up
before p rocee
d
i
n
g .
B
A
L A
N
C
E
1 . C
h
ec
k
/Ad
ju
st DC ΒαΙ
ΝΟΤΕ
This instrument s
h
o
u ld be calibrated at an ambient
tem
p
e
r
atu
r e of +20 ° C to +30° C fo
r
best overall
acc
ur
acy. T
h e performance of t h e instrument can be
c
h
ec
k
e
d
at any temperatu
r e within t
h
e 0° C to +50° C
range.
P
reliminary Control Settings
Set t
h
e calibration oscilloscope a
nd time base unit for α
s
h arp, well d efined trace . Set t
h
e 7 Α 16 Α co
n
t
r
ol as follows :
7 Α 16 Α Control Settings
\/4 . Ad j ust GAI
N
P OSITIO
N
m
i
dr
a
n
ge
α . Con
n
ect t
h
e Standar d Am
p
lit
u
de Cali
b
rator to t
h
e
P O
L
A
R
ITY
+
UP 7 Α 16 Α I
NPU
T co
nn
ector wit
h
t
h
e 42-inc
h BN
C ca
b le .
B
A
N
D
W
IDT
H FULL
V
O
L
TS/DI
V 5 mV
AC-DC-G
N
D
GN
D
b . Set t
h
e AC-G
N
D-DC switc
h
to DC an d ad
ju st t
h
e
V A
R
IA
BLE
CA
L
IN
Stan d ard
Amp
lit ud e Cali
b
rato
r
to obtain α 20 m
V
s
q
u
are-wave .
α . C
h
ec
k
-t
h
at t
h
e vertical trace s
h
ift is 0 .2 d ivision o
r
less w
h
ile switc
h
i
n
g t
h
e POLARITY switc
h b
etwee
n
+
UP
a
nd
I
NVER
T .
2 . C
h
ec
k
/A d
j ust 2 Χ ΒαΙ
3 . C
h
ec
k
/A d j ust
V
ar ΒαΙ
α . C
h
ec
k
-t
h
at t
h
e vertical trace s
h
ift is 0 .2 d ivision or
less w
h
ile rotati
n
g t
h
e
V
A
R
IA
BLE
control t
h
ro
u
g
h
o
u
t t
h
e
ra
n
ge .
b . A d
ju
st-11553,
V
a
r
ΒαΙ control, for
α ve
r
tical
d eflection of 0 .2 d ivisio
n
or less w
h
ile rotati
n
g t
h
e
V A
R
IA
BLE
control t
h
ro
u
g
h
out t
h
e ra
n
ge .
ε .
R
et
u
rn t
h e V A
R
IA
BLE
control to t
h
e CA
L
IN
position .
GAI
N
c . Ad
ju
st-t
h
e front pa
n
el GAI
N
control to obtain α
d isp lay of exactly 4 divisio
n
s .
5 . C
h
ec
k
/A d
j ust 2 Χ Gain
α . Set t
h
e
V
O
L TS/DI V switc
h
to 10
mV
a
n
d a
dj
ust t
h
e
Stan dard Am
p litu d e Cali
b
rator to obtain α 50 m
V
s
q
uare-wave.
b.
Ad
ju
st-13160, DC
ΒαΙ control, fo
r
α vertical
deflection of 0 .2 d ivision or less w
h
ile switc
h
ing t
h
e b . C
h
ec
k
-t
h
at t
h
e d isp lay am p litu d e is 5 divisions ±0 .1
PO
L
A
R
ITY switc
h b
etween +
UP
an
d
I
NVER
T . d ivision .
c . R
eturn t
h
e POLARITY switc
h
to +
UP .
ε . Ad
j ust-11413, 2 Χ Gai
n
co
n
trol, to obtain α vertical
d
is
p
lay of 5
d
ivisions ±0 .1
d
ivision .
α . C
h
ec
k
-t
h
at t
h e vertical trace s
h
ift is 0 .2 divisio
n
or
J
6 . Check All
V
O
L
TS/DI
V
Gain Settings
less w
h
ile switc
h
ing t
h
e
V
O
L
TS/DI
V
switc
h
betwee
n
10 m
V
a
nd 5 m V
.
α .
Ch
ec
k
-t
h
at all
V
O
L TS/DI
V
gain setti
n
gs are wit
h
in
2% .
R
efer to Ta
b le 5-1 for control setti
n
gs a
n
d tolerances .
b . A d ju st-11453, 2 Χ ΒαΙ control, for α
vertical
d eflection of 0 .2 divisio
n
or less w
h
ile switc
h ing t
h
e b . R et
u
r
n
t
h
e V O
L
TS/DI
V
switc
h
to
10 m
V
a
nd
V
O
L TS/DI
V
switc
h
between 10 m
V
a
n
d 5 m
V
.
d isconnect t
h
e Sta
nd
ar d Am
p litu d e Calibrator .