AIR FORCE
T033A1-12-496-1
NAVELEX
0969-LP-1
70-0010
General
Information
c.
Leading
Particulars.
Tables
1-1
through
1-3
list the
electrical,
environmental,
and physical
characteristics
of
the
AN/USM-425(V)1 .
The electrical
characteristics
are
valid
under
these conditions:
(1
)
the instrument has
been
calibrated
(adjusted)
as described in Section V at
an am-
bient
temperature between
-(-20°
and +30°C (+68
°
to
-(-86°
F),
(2)
the
instrument is operating in
an ambient
temperature
between
—15°
and
•(•55°C
(-(-5°
to
-(-131
F)
and
(3)
the
instrument has
warmed-up for 20 minutes, or
5 minutes if
above 0°C
(-(-32°
F).
Table
1-1.
Electrical
Characters
Item
Characteristic
VERTICAL
DEFLECTION
SYSTEM
Deflection
Factor
Calibrated
Range 5
millivolts/division to 5
volts/division
in
10
calibrated
steps in
a
1-2-5
sequence.
Accuracy
Within 2%
from
0°
to
-(-40°C
(-(-32°
to
-(-104°F).
Within 3%
from
—15°
to
0°C
(-(-5°
to
-(-32°F) and from
-(-40°
to -(-55°C
(-(-104°
to
-(-131°F).
Uncalibrated
Variable
Range
Continuously
variable
between calibrated settings.
Extends
deflection factor to at
least
12.5
volts/division.
Bandwidth
at
—3
dB points
Dc
to at
least 100
megahertz. A limit selector sets a
bandwidth limit
at 20
megahertz
±5
megahertz.
AC
Low-Frequency
Response
at
-3
dB
points
Without
Probe or
With
P6101
Probe
10
hertz or less
at
all
deflection factors.
With
P6104
Probe
1
hertz or less
at
all
deflection
factors.
Maximum Input
Voltage
(dc or ac
coupled)
±250 volts dc
plus peak ac at
20 kilohertz.
±10 volts
dc
plus peak ac at
1
megahertz.
±5 volts dc plus peak ac at
100
megahertz.
Input
Impedance
Resistance
1
megohm
within
2%.
Capacitance
Approximately
20
picofarads.
Channel
Isolation
At
least
100:1,
dc to 10
megahertz.
At
least
50:1,
10 to
20
megahertz.
At
least
25:
1
, 20 to
50
megahertz.
At
least 15:1,
50 to 100
megahertz.
Common Mode Rejection
Ratio At least
25:
1 ,
dc to 10
megahertz.
At least
10:1,
10 to 50
megahertz.
DC
Drift
Not
more than 0.1
centimeter/hour from
0°
to
±55°C
(+32°
to
+131°F).
Not more
than 0.5
centimeter/hour from —1 5 to 0 C
(+5 to +32
F),
DC Balance
Within 0.2
division over
calibrated
vertical
deflection
range.
1-2