Tektronix 422, Инструкция по эксплуатации

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SECTION 1
TYPE 422 SPECIFICATION
W ith A C -D C P o w e r S upply
Change information, if any, affecting this section will be found at the rear of this manual.
In tro d u ctio n
The Tektronix Type 422 Oscilloscope is a solid-state
portable instrument that combines small size and light
weight w ith the ability to make precision waveform meas­
urements. The instrument is mechanically designed to w ith ­
stand the shock, vibration and other extremes of environ­
ment associated w ith portability. The dual-channel DC-to-
15 megahertz vertical system provides calibrated deflection
factors from 0.01 to 20 volts/division. A X I 0 gain feature
in Channel 2 allows each Channel 2 deflection factor to be
increased 10 times and provides a minimum deflection
factor fo r Channel 2 o f 0.001 volt/division in the 0.01 posi­
tion (AC-coupled with reduced frequency response). The
trigger circuits provide stable triggering over the full range
of vertical frequency response. The horizontal deflection
system provides calibrated sweep rates from 0.5 second to
0.5 microsecond/division. A X I 0 horizontal magnifier
allows each sweep rate to be increased 10 times and pro­
vides a maximum sweep rate o f 0.05 microsecond/division
in the 0.5 jus position. X-Y measurements can be made by
applying the vertical (Y) signal to either the INPUT 1 or
INPUT 2 connector and the horizontal (X) signal to the
HORIZ IN OR TRIG IN connector (TIM E /D IV switch set
to EXT HORIZ).
The Type 422 w ith AC-DC Power Supply can be op­
erated from any one o f three power sources; AC line, exter­
nal DC, or internal rechargeable batteries. The regulated
low-voltage power supply assures that instrument perform ­
ance is not affected by variations in internal battery charge
level, applied DC voltage, or AC line voltage and frequency.
Maximum total power consumption is 26 watts fo r external
DC operation and 30 watts fo r AC operation. The instru­
ment w ill operate about four hours from the internal bat­
teries when fu lly charged.
This instrument w ill meet the electrical characteristics
listed in Table 1-1 follow ing complete calibration as given
in Section 5. The performance check procedure given in
Section 5 provides a convenient method o f checking instru­
ment performance w itho ut making internal checks or
adjustments. The following electrical characteristics apply
over a calibration interval o f 1000 hours and an ambient
temperature range o f —15° C to +55° C, except as other­
wise indicated. Warmup tim e fo r given accuracy is 20
minutes.
TABLE 1-1
ELECTRICAL
Characteristic
Performance
VERTICAL DEFLECTION SYSTEM
Deflection Factor
Channel 1 or 2 cali­
brated range, X I
gain
W ithout probe 10 m illivolts/division to 20 volts/
division in 11 steps. Steps in 1-2-
5 sequence.
With P6012 Probe 100 m illivolts/division to 200
volts/division in 11 steps. Steps
in 1-2-5 sequence.
Channel 2 only cali­
brated range, X I 0
gain
W ithout probe
One m illivolt/division to two
volts/division in 11 steps. Steps
in 1 -2-5 sequence.
Characteristic
Performance
With P6012 Probe 10 m illiv o lts /d iv is io n to 20
volts/division in 11 steps. Steps
in 1-2-5 sequence.
Channel 1 or 2 accu­
racy, X I gain
With or w itho ut
probe
Within 3% o f indicated deflec­
tion.
Channel 2 only "accu­
racy, X10 gain
With or w itho ut
probe
+20° C to +30°
C
—15° C to +55°
C
Within 4% of
indicated de­
flection.
W ithin 7.5% of
indicated de­
flection.
Uncalibrated (variable)
range
Continuously variable between
c a lib ra te d d e fle c tio n factor
settings. Extends maximum un­
calibrated deflection factor to at
least 50 volts/division.
1-1