Tektronix 422, Instruction Manual

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Specification—Type 4 22 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,
X I 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,
X I gain
W ithout 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 w itho ut
probe
Five hertz or less to five mega­
hertz or greater (—3 dB points).
Step Response
Risetime
Channel 1 or 2,
X I 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.
D ual-trace, alternate between
channels.
D ual-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 V o lt­
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 V O LTS /D IV
switch positions.
DC D rift
D rift with time
Short term (with
temperature and
line voltage con­
stant)
0.1 division or less during any
minute w ithin first hour after
20-minute warmup.
Long term (temper­
ature b20°
C and +30° C and
line voltage con­
stant)
0.2 division or less total during
first hour after 20-minute warm­
up.
D rift with line voltage
change (temperature
held constant)
0.1 division or less w ith line v o lt­
age varied from low line to high
line.
D rift with temperature
(line voltage constant)
0.2 division or less fo r each 10°
C change in temperature.
Common Mode Rejection
Ratio
100:1 or greater at 50 kilohertz
w ith optimized setting o f Chan­
nel 1 and 2 GAIN adjustments at
one kilohertz.
Channel Isolation (at 15
megahertz)
Equal deflection fac­
tors
A t least 100:1.
Unequal deflection
factors
A t 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