General
Information—7A42
TABLE
1-2 (CONT)
Electrical Characteristics
Characteristic
Performance
Supplemental
Requirement
Information
DISPLAY
(CONT)
Input
Characteristics
(cont)
High
Impedance
1
Megohm
±1%,
in
parallel
with
approx
imately
15
pF.
Low
Impedance
50
ohms
±1
ohm
at
de.
VSWR
<1.15:1,
DC
to
300
MHz.
VOLTS/DIV
Shift
0.2
divisions
or
less
shift
when VOLTS/DIV
is
changed in
either
TTL
or
ECL
Families
or
between
Families.
POSITION
Range
At
least
+7
divisions
to
-7
divisions
but
less
than
+9
divisions
to
-9
divisions
from
graticule center
with
gain
calibrated.
Displayed
Noise
Grounded
input
at
maximum
sensitivity,
7A42
triggered
on
another
channel,
tested
at
1
ms/div
and
10
ns/div,
not more
than
0.02
divisions
RMS,
as
measured
in
a
7854.
DC
Drift
Drift
with
Time
Not
more
than 0.2
divisions
in any 10
minutes
after
twenty
minute
warm-up
(ambient
temperature
and
line
voltage
constant).
REV
JUL
1984
1-9