Speciflcatlon-2445A/2455A Service
Table
1-1
(cont)
Characteristics
Performance Requirements
VERTICAL DEFLECTION
SYSTEM-ALL
CHANNELS
Low-frequency Linearity
Bandwidth Limiter
Vertical
Signal
Delay
Chopped
Mode
Switching
Rate
Minimum
P-P
Signal
Amplitude for Stable Triggering
from
Channel
1 or
Channel
2
Source
2455A
DC
Coupled
NOISE
REJ
Coupled
AC
Coupled
HF
REJ
Coupled
LF
REJ
Coupled
2445A
DC
Coupled
NOISE
REJ
Coupled
AC
Coupled
HF
REJ
Coupled
LF
REJ
Coupled
(a) Performance
requirement
not
checked
In
manual.
0.1
division or
less
compression or expansion of a two-division,
center-screen
signal
when
positioned
anywhere
within graticule
area.
Reduces
upper 3 dB bandpass to a limit of 13
MHz
to
24
MHz.
At least
30
ns
of
the
sweep
is
displayed before
the
triggering event
is
displayed at
any
SEC/DIV
;;i.10
ns/div. At 5 ns/div, at least
10
ns
of
the
sweep is displayed before
the
triggering event.
8
With
displayed
SEC/DIV
in
the
20
µS
to 2 µs/div
range,
the
switching rate is 2.5 MHz ±0.2%. Otherwise,
the
switching rate is
1
MHz
± 0.
2%.
The
display cycle rate equals the chop switching
rate
divided
by
the
number of channels displayed.
The
chop
switching rate
is
modulated slightly to
minimize
waveform breaks
with repetitive
signals.
8
TRIGGERING
0.35
division
from
de
to
50
MHz; increasing to
1.0
division
at
300
MHz
and
1.5
divisions
at
500
MHz.
<= 1.2
divisions
from
de
to
50
MHz; increasing to 3 divisions at
300
MHz
and
4.5
divisions
at
500
MHz.
0.35
division
from
60
Hz
to
50
MHz;
Increasing
to 1.0 division at
300
MHz
and
1.5
divisions
at
500
MHz.
Attenuates signals below
60
Hz.
0.5
division from
de
to
30
kHz
.
0.5
division
from
80
kHz to
50
MHz; increasing to 1.0 division at
300
MHz
and
1.5
divisions
at
500
MHz.
0.35
division
from
de
to
50
MHz;
increasing to
1.5
divisions at
250
MHz.
<= 1.2
divisions
from
de
to
50
MHz; increasing to
4.5
divisions
at
250
MHz.
0.35
division
from
60
Hz
to
50
MHz; increasing to 1.5 divisions at
250
MHz
. Attenuates signals below
60
Hz.
0.5 division from
de
to
30
kHz
.
0.
50
division from
80
kHz to
50
MHz; increasing to
1.5
divisions at
250
MHz.
1-5
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