Specification—Type 422 AC-DC
Characteristic
Performance
Low-Frequency Line
arity
0.15 division or less compression
or expansion of a center-screen
two-division signal when posi
tioned to the top and bottom of
the graticule area.
Bandwidth with Four-
Division Reference
DC input coupling
Channel 1 or 2,
XI gain
DC to 15 megahertz or greater
(—3 dB points).
Channel 2 only,
X10 gain
DC to five megahertz or greater
(—3 dB points).
AC input coupling
Channel 1 or 2,
XI gain
Without probe Two hertz or less to 15 mega
hertz or greater (—3 dB points).
With P6012 Probe
0.2 hertz of less to 15 megahertz
or greater (—3 dB points).
Channel 2 only,
X10 gain
With or without
probe
Five hertz or less to five mega
hertz or greater (—3 dB points).
Step Response
Risetime
Channel 1 or 2,
XI gain
24 nanoseconds or less.
Channel 2 only,
X10 gain
70 nanoseconds or less.
Aberrations
With four-division
pulse centered
vertically
Peak aberrations not to exceed
+3% or —3%; total peak-to-peak
aberrations not to exceed 3%.
With eight-division
pulse centered
vertically
Peak aberrations not to exceed
+5% or —5%; total peak-to-peak
aberrations not to exceed 5%.
Vertical Display Modes
(selected by front-
panel vertical Mode
switch)
Channel 1 only.
Channel 2 only.
Dual-trace, alternate between
channels.
Dual-trace, chopped between
channels.
Added algebraically.
Input Coupling Modes
(selected by front-
panel Input Coupling
switch)
AC (capacitive) coupled or DC
(direct) coupled.
Characteristic
Performance
Maximum Input Volt
age
AC and DC input
coupling
300 volts (DC + peak AC). Peak-
to-peak AC less than 300 volts
(one kilohertz or less).
Input RC Characteris
tics
Resistance
One Megohm ±2%.
Capacitance
33 picofarads ±1 pF.
Time constant
33 microseconds ±1%.
1 nput Current at +20°
C to +30° C
Negligible.
Step Attenuator Balance
0.1 division or less trace shift be
tween calibrated VOLTS/DIV
switch positions.
DC Drift
Drift with time
Short term (with
temperature and
line voltage con
stant)
0.1 division or less during any
minute within first hour after
20-minute warmup.
Long term (temper
ature between +20°
C and +30° C and
line voltage con
stant)
0.2 division or less total during
first hour after 20-minute warm
up.
Drift with line voltage
change (temperature
held constant)
0.1 division or less with line volt
age varied from low line to high
line.
Drift with temperature
(line voltage constant)
0.2 division or less for each 10°
C change in temperature.
Common Mode Rejection
Ratio
100:1 or greater at 50 kilohertz
with optimized setting of Chan
nel 1 and 2 GAIN adjustments at
one kilohertz.
Channel Isolation (at 15
megahertz)
Equal deflection fac
tors
At least 100:1.
Unequal deflection
factors
At least 10,000:1.
Chopped Mode
Repetition rate
150 kilohertz ±20%.
Time segment from
each channel
2.0 to 4.7 microseconds.
Polarity Inversion (select
ed by Channel 2 IN
VERT switch)
Displayed signal from Channel 2
can be inverted.
1-2
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