Tektronix 1A1, Инструкция по эксплуатации

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IMPORTANT
VOLTAGE AND WAVEFORM CONDITIONS
Circuit voltages were measured with a 20,000 O/V DC
VOM. All readings are in volts. Voltages were measured
with respect to ground unless otherwise indicated.
Waveforms shown are actual waveform photographs taken
with a Tektronix Oscilloscope Camera equipped with a
projected graticule. Each division of the graticule repre­
sents one centimeter.
Voltages and waveforms (shown in blue) on the diagrams
are not absolute and may vary between Type 1A1 units.
A 30-inch flexible cable plug-in extension (012-0038-00) was
used to operate the Type 1A1 outside the oscilloscope plug­
in opening and a rigid extender card (
0 1 2
-
0100
-
00
) was used
for access to the Channel 1 and Output Amplifier cards test
points. Any apparent differences between voltages measured
with the voltmeter and the DC levels shown at the right side
of the waveforms are due to differences in circuit loading,
operating mode, and measurement resolution.
NOTE
Waveforms for Channel 2 are the same as for
Channel 1 except that Channel 1 has a TRIGGER
OUT amplifier and a CH 1 SIGNAL OUT amplifier.
The waveforms were obtained using a test oscilloscope with
a 10X probe. The system characteristics are as follows: Min­
imum vertical deflection factor of 0.05 V/cm with the probe
10X attenuation factor included, frequency response of DC
to 10 MHz. The procedure for obtaining the time related
waveforms and DC levels is described in the Maintenance
section.
CAUTION
If the Type 1A1 is used with the Type 544, 546
or 547 Oscilloscope and the plug-in extension
is used, be sure to pull the Oscilloscope plug-in
sensing switch to its outward position before turn­
ing on the oscilloscope power. The switch con­
nects the + 7 5 -V supply to pin 15 of the 16-pin
interconnecting plug. Use care when obtaining
voltage and waveform measurements in an oper­
ating unit. An inadvertant movement of the test
prods or probe may cause a short between cir­
cuits and seriously damage circuit components,
such as solid state devices.
Control Settings
Type 1A1
(See individual diagrams for remaining control settings.)
VOLTS/CM
VARIABLE (VOLTS/CM)
POSITION
(both channels)
PULL FOR INVERT
(both channels)
.5
CALIB
Near midrange
Normal or in
Type 547 Oscilloscope with 1A1
Triggering controls
Triggering Level Near 0 and knob pushed
for all voltages and wave­
forms except ALT and
CHOP waveforms. Fully
CW to free run sweep for
Mode
Slope
Coupling
Source
Time Base Controls
Time/Cm
Variable (Time/Cm)
Other controls
Amplitude Calibrator
Sweep Magnifier
Power
Test Oscilloscope
External Trigger signal
applied to Trigger Input
connector
Internal Trigger
Time/Cm
V/Cm
Input Coupling
SCHEMATIC SYMBOLS
©
<§>
ALT and CHOP wave­
forms on switching Cir­
cuit 5
Auto Stability
+
AC
Normal Int
,5mSec to display 1-kHz
c a l i br a t o r signal (Dia­
grams 2 and 4) 1 jaSec for
Diagram 5
Calibrated
2
volts
XI (Off)
On
(for signal tracing)
2-V peak-to-peak 1-kHz
c a l i b r a t o r signal (from
Type 547 with
1
A
1
) to
obtain time-related wave­
forms or diagrams
2
and
4.
Waveform photographs
for ALT and CHOP modes
on diagram 5 are not
time-related.
See waveforms
See waveforms
AC, to photograph wave­
forms. DC, to obtain DC
levels (when shown) at
right side of waveforms.
Use appropriate V/Cm
setting (not given).
Screwdriver adjustment
Front or rear control
Refer to indicated dia­
gram
Connection to circuit
board mode with pin
connector at indicated
pin.
Connection soldered to
etched-wiring board.
Blue line encloses compo­
nents located on
etched-wiring card or
board.