Specification; Introduction - Tektronix 7A19 Instruction Manual

Section
1— 7A19
SPECIFICATION
Introduction
The
7A19
Amplifier plug-in unit
is
a
wide band
amplifier
designed
for use
with
TEKTRONIX
7000-Series
oscillo-
scopes.
Readout encoding
circuitry
is
provided
in
the
7A19
to
allow
probe coding, deflection factor readout,
and
IDENTIFY
functions.
The
7A19
can be operated
in
any
compartment
of the 7000-Series oscilloscopes,
but
is
pri-
marily
intended for use
in
the vertical plug-in
compartments.
The
following
electrical
characteristics are valid
over the
stated
environmental
range for
instruments
calibrated at
an
ambient temperature
of
+20°C to -t30°C, and
after a five
minute
warmup
unless otherwise noted.
Option 4
An
optional
VARIABLE DELAY
may
be ordered with
the 7
A
19
to
provide a
signal
delay
of
up
to
±500
ps.
TABLE
1-1
ELECTRICAL
Characteristic
Performance Requirement Supplemental Information
Deflection Factor
Calibrated
Range 10
mV/div
to
1
V/div,
7 steps in a
1 ,
2,
5
sequence
Pre-Charge
circuit
may
be used
as
a
calibrated
100X
attenuator
Gain
Ratio
Accuracy
Within
3%
with
GAIN
adjusted at
10
mV/div
when
driven
from 50
ohm
source.
Front
panel
GAIN
control allows
calibra-
tion to
mainframe.
Frequency Response
(8 divi-
sion reference,
mainframe
dependent)
Upper Bandwidth
AC
or
DC
coupled 10
mV/div
to
1
V/div
With 7400, 65
MHz;
With 7500, 100
MHz;
With 7700, 175
MHz;
With 7900,
500
MHz
Lower Bandwidth
AC
Coupled
1
kHz
or
less
Maximum
Input
Power
DC
or
AC
coupled
Voltage
(AC
coupled)
2 watts average or
50
divisions
peak
deflection.
100
volts
(DC
+ peak
AC)
not to
exceed
2 watts average or
50
divisions
peak.
CAUTION
Pre-charge circuit
must be used
for
both
charging
and
discharging
AC
coupling
capacitor to potentials
greater than
50
divisions
equivalent
voltage.
Input
Impedance
Resistance
(DC
or
DC GND)
50
ohms
±1
ohm
VSWR
is
typically
less
than 1.25
@
500
MHz
Reflection Coefficient
(Time Domain)
Less than
0.1
peak
to
peak
Maximum
Input Current Less than
0.2
mA
REV.
B,
SEPT. 1977
1-1