HP 1740A - Page 9

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dl
Fe |
‘dg lad
Model
1740A
General
Information
Table
1-1.
Specifications
(Cont'd)
MAIN
AND
DELAYED
TIME
BASES
Single:
sweep
occurs
once
with
same
triggering
RANGES
as
Normal;
reset
pushbutton
arms
sweep
and
Main:
50
ns/div
to
2
s/div
(24
ranges)
in
1,
2,
5
se-
lights
indicator.
quence.
Delayed:
50
ns/div
to
20
ms/div
(18
ranges)
in
1,
2,5
DELAYED
SWEEP
(SWEEP
AFTER
DELAY)
sequence.
Auto:
delayed
sweep
automatically
starts
at
end
of
delay.
Accuracy
Trig:
delayed
sweep
is
armed
and
triggerable
at
end
of
delay
period.
Sweep
Time/Div
Temp
Range
0°C to +15°C
+15°C to +385°C
+35°C to +55°C
INTERNAL:
de
to
25
MHz
on
signals
causing
0.3
divi-
sions
or
more
vertical
deflection,
increasing
to
1
division
of
vertical
deflection
at
100
MHz
in
all
display
modes
(required
signal
level
is
increased
by
2
when
in
Chop
mode
and
by
5
when
X5
vertical
magnifier
is
used).
Triggering
on
Line
frequency
is
also
selectable.
*Add
1%
for
50
ms
to
2s
ranges.
EXTERNAL:
dc
to
50
MHz
on
signals
of
50
mV
p-p
or
more
increasing
to
100
mV
p-p
at
100
MHz
MAIN
SWEEP
VERNIER:
continuously
variable
be-
(required
signal
level
is
increased
by
tween
all
ranges,
extends
slowest
sweep
to
at
least
5
2
when
in
Chop
mode).
s/div.
UNCAL
light
indicates
when
vernier
is
not
in
CAL
position.
EXTERNAL
INPUT
RC:
approx
1
MQ
shunted
by
MAGNIFIER
(X10):
expands
all
sweeps
by
a
factor
of
approx
20
pF.
10,
extends
fastest
sweep
to
5
ns/div.
MAXIMUM
EXTERNAL
INPUT:
250
V
(dc
+
peak
ac)
or
500
V
p-p
ac
at
1
kHz
or
less.
CALIBRATED
SWEEP
DELAY
LEVEL
and
SLOPE
DELAY
TIME
RANGE:
0.5
to
10
X
Main
Time/
Internal:
at
any
point
on
the
positive
or
negative
slope
Div
settings
of
100
ns
to
2
s
(minimum
delay
of
the
displayed
waveform.
150
ns).
External:
continuously
variable
from
+1.5
V
to
—15V
on
either
slope
of
the
trigger
signal,
+15
V
to—15
V
in
divide
by
10
mode
(+10).
COUPLING:
AC,
DC,
Main
LF
REJ,
or
Main
HF
REJ.
AC:
attenuates
signals
below
approx
20
Hz.
LF
Reject
(Main
Sweep):
attenuates
signals
below
approx
4
kHz.
HF
Reject
(Main
Sweep):
attenuates
signals
above
approx
4
kHz.
TRIGGER
HOLDOFF
(Main
Sweep):
increases
sweep
holdoff
time
in
all
ranges.
DIFFERENTIAL
TIME
MEASUREMENT
ACCURACY
*Accuracy
(+15°C to +35°C)
Main
Time
Base
Setting
100
ns/div
to
20
ms/div
|
+(0.5%
+
0.1%
of
full
scale)
50
ms/div
to
2
s/div
+(1%
+
0.1%
of
full
scale)
*Add
1%
for
temperatures
from
0°C
to
+15°C
and
CALIBRATED
MIXED
TIME
BASE
+35°C
to
+55°C.,
Dual
time
base
in
which
the
main
time
base
drives
the
first
portion
of
sweep
and
the
delayed
time
base
completes
the
sweep
at
the
faster
delayed
sweep.
DELAY
JITTER:
<0.002%
(1
part
in
50
000)
of
maxi-
Also
operates
in
single
sweep
mode.
Accuracy,
add
mum
delay
in
each
step
from
+15°C
to
+35°C;
2%
to
main
time
base
accuracy.
<0.005%
(1
part
in
20
000)
from
0°C
to
+15°C
and
+35°C to +55°C.
A
vs.
B
OPERATION
TRIGGERING
BANDWIDTH
MAIN
SWEEP
Channel
A
(Y-axis):
same
as
channel
A.
Normal:
Sweep
is
triggered
by
internal
or
external
Channel
B
(X-axis):
dc
to
5
MHz.
signal.
DEFLECTION
FACTOR:
5
mV/div
to
90
V/div
(12
Automatic:
bright
baseline
displayed
in
absence
calibrated
positions)
in
1,
2,
5
sequence.
of
input
signal.
Triggering
is
same
as
Normal
PHASE
DIFFERENCE
BETWEEN
CHANNELS:
<3°,
above
40
Hz.
dc
to
100
kHz.
1-3