S Ectio N Spe Ci Fication; Introduction; E Lectrical; Deflection Factor - Tektronix 7a11 Instruction Manual

I ntro
d
uction
T
he
7 A 1 1 Am p lifier is α versatile
p
l
u
g-in am plifier
u
nit
whic h provides α DC to 150 MHz
b
andwidth with Te k-
tronix 7700-Series Oscillosco pes . When
d
esired, the
u
p
per
f
requency -3 dB point can
b
e limited to 20 MHz by α
front-panel switch.
Calibrated deflection factors of from 5 mV to 20 V per
division are
p
rovi ded in 1-2-5 se que nce . In ad dition, α va ri-
able gain control makes it possible to set the amplifier to
any deflection facto r between 5 mV
a
nd 50 V pe r division.
Α
p
erma nently attached probe provides low-input capa-
citance (2 .0 pF at 2
V
/division, 5.8 pF at 5 mV/division)
while maintaining
h
ig h i np ut
r
esista nce (1 ΜΩ ). BN C-
connecto rs can be attached to the
p
r obe t hro ugh α
p
robe-
tip to BN C-female a
d
apter. This a
d
apter serves as t h e
p
ro be's in put co nn ecto r w h e n
t
he probe is sto r ed, but can
be attac h ed to th e p robe ti p wh et her or
n
ot the probe is
store
d
in
t
he
p
lug-in unit .
Α 50 Ω termination/adapte r (standard accesso ry) pe r-
mits im pedance matching fo r u se of the probe in 50 Ω
e
nvi ronme nts . Wh en
t
h e terminatio n/ada
p
ter is
u
sed, α low
standing wave
r
atio (VS WR) can
b
e ex pecte
d
. The
V
SWR
can be furt he r r e d uced
b
y inse rti ng α 2Χ atte nuator
i
n
t
he
signal
p
ath a h ea d of the 50 Ω termination/a
d
apter. Ap prox-
imate values of
V S WR wh ic h can
b
e expecte
d
un
d
er
b
oth
con
d
itions a r e s h ow n in Fig. 1-4.
T
he
p
erform ance sp ecification of the 7A 11 Amp lifier is
d
escribed in
d
etail in Ta ble 1-1 . The specification is valid
un der
t
he followi ng conditio n s:
(M
Change information, if any, affecting this section will be found at the
r ear of the manual .
Calib ration must
h
ave been pe rformed at an ambient
temperatu r e
b
etwee n +20°C and +30°C.
Operatio n must be wit h i n any specified enviro nme nt,
in α cali br ated Oscilloscope, after twenty minutes of
wa rmup.
S
E
CTIO
N
1
S
PE
CI
F
ICATIO
N
REV .
M
A R 1974
TA BLE 1-1
7Α11 Amplifie r Specificatio n
7 Α11
Characteristic Performance
R
equirement
ELECT R ICAL
Deflection Factor
(VOLTS/DI V)
Calibrate
d R
ange 5 mV/div to 20
V /div ; 12 ste p s in
5, 10, 20 sequ ence
Gain R
atio
W
it hin 2% of GAI N adjusted at 0.1
Accuracy
V
/div
U ncalib r ate d Continuously variable ; exte nd s de-
flection factor to at least 50
V
/div
GAI
N
Permits adjustment of deflection
facto r at 0.1 V/div for all Oscillo-
scopes
F
reque ncy
R
espo nse
(8 Division Reference)
Bandwi
d
th, Direct
Coupled In put
FULL Mode DC to 150 MHz with 7700-Series
Oscillosco pe
DC to 90 MHz with 7500-Series
Oscillosco pe
20 MHz
M
ode
DC to 20 MHz within 2 MHz
Ca pacitive Coup led 15 Hz or less
L
ower
F
requency
-3 dB Limit
R
isetime
2.4 ns or less wit h 7700-Series
Oscilloscope
3.9
n
s or less with 7500-Series
Oscilloscope
R
isetime (6 Div 1 .40
n s or less 5 mV-20 V/div with
R
eference)
7904 oscilloscope .