Tektronix 323, Инструкция по эксплуатации

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Operating Instructions— Type 3 2 3
DC
Top Panel
FOCUS
INTENSITY
Extends triggering limit to DC so that a
trigger will be generated for even the
slowest change of signal through the se­
lected trigger level.
Automatically re­
verts to AC-coupling during AUTO Trig­
ger operation.
NOTE
The T rig /H oriz Coupling switch
must be in an EXT TRIG OR HORIZ
position when EXT HORIZ opera­
tion is selected by the TIME/DIV
switch. Leaving it in either o f the
INT TRIG positions when
EXT
HORIZ operation is selected ap­
plies the vertical signal to both
the vertical and horizontal axis,
creating a meaningless display.
Thumbwheel accessible through top panel.
Adjusts CRT electron beam for optimum
display sharpness.
Thumbwheel accessible through top panel.
Controls the brightness of the CRT display.
IMPORTANT
Battery operating time varies in­
versely with CRT trace intensity.
Use the minimum brightness nec­
essary fo r good viewing.
as probe calibration. Has approximately
10 kS2 source impedance. External load
will decrease its output in proportion to
the load.
Ground Banana jack type binding post connected
to chassis ground.
Right Side
Panel
EXT DC
POWER
AC POWER
Banana jack type input connectors (red
+ , black —). Accepts external DC power
source from 6 to 16 V for Oscilloscope
operation. Does not charge battery pack.
Negative input jack is connected to case
ground.
CAUTION
Reverse polarities applied to the
EXT DC POWER connectors w ill
blow the high voltage fuse.
3 terminal line plug connector. Accepts
90 to 136 V AC, 48 to 440 Hz (or 180 to
272 V AC, 48 to 440 Hz, if wired for 230
V AC nominal input voltage) for Oscillo­
scope operation and battery charging.
Batteries are on charge whenever power is
applied, regardless of Oscilloscope switch
positions.
Rear Panel
Left Side Panel
EXT TRIG OR
HORIZ
ATTEN Two position slide switch. When in 10X
position it attenuates the EXT TRIG OR
HORIZ INPUT signal by a factor of 10.
INPUT BNC connector with 62 pF input capaci­
tance. Capacitance changes slightly when
ATTEN is at 10X . Has 1 MU input resis­
tance whenever the Trig/Horiz coupling
switch is at DC or when the EXT TRIG OR
HORIZ ATTEN switch is at 10X. Maxi­
mum allowable input is 500 V DC -)- peak
AC.
EXT BLANK Banana jack which is DC coupled to the
unblanking circuits. Positive signals be­
tween 5 and 20 volts cause blanking of
CRT trace. 150 V DC - f peak AC maxi­
mum allowable input signal.
VERT INPUT BNC connector with 1 MU and 47 pF in­
put impedance. 500 V DC - f peak AC
maximum allowable input.
IMPORTANT
Battery operating time varies in ­
versely with input signal frequen­
cy and the display amplitude.
CAL OUT Banana jack which makes the vertical
amplifier's 0.5 V square wave signal avail­
able for monitoring or external use, such
Power Pack
Switch 3 position slide switch which allows se­
lection of the power source and the bat­
tery charge rate, as follows:
FULL CHG AC power applied to the line connector
charges the batteries at the maximum rate
(full charge in 16 hours), and supplies
power for Oscilloscope operation. If no
AC is present, internal battery power is
applied to the POWER switch for Oscil­
loscope operation.
TRICKLE
CHG Same conditions exist as for FULL CHG,
except that the charging rate is reduced.
Counteracts self-discharge, thus keeping
battery fully charged.
EXT DC Permits operation from a DC source of
between 6 and 16 volts. DC input does not
recharge the internal battery pack.
IMPORTANT
The oscilloscope w ill not operate
in any power mode if the switch
is in the EXT DC position and no
external DC power is applied.
Fuses Located internally. See Maintenance sec­
tion.
Cover
Securing
Screw Located near bottom-middle of rear panel.
Counterclockwise rotation disconnects cov­
er from oscilloscope chassis, allowing
chassis to be removed through front of
cover assembly.
2-4