Tektronix 503, Instruction Manual

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Operating Instructions— Type 503
TABLE 2-1
SLOPE Determines whether triggering occurs on
rising portion ( + slope) or falling portion
(— slope) of triggering waveform.
COUPLING Selects whether triggering w ill occur at
a specific DC level or a t an AC level.
SOURCE Selects the source of the triggering signal.
EXTERNAL TRIG. Input connector for external triggering
IN
signals.
DC BAL.
+INPU T and
-IN P U T con­
nectors
+INPU T and
— INPUT
switches
Provides for vertical stability o f no-signal
trace for all positions o f the SENSITIVITY
control.
Input connectors for signal to be displayed
vertically. (Signals connected to the — IN ­
PUT connector w ill be displayed inverted.)
Select desired coupling for incoming sig­
nal.
HORIZONTAL CHANNEL
LEVEL Selects the voltage point on the trigger­
ing waveform at which the horizontal
sweep is triggered. This control also selects
automatic triggering (AUTO, position) or
allows the sweep to free run (FREE RUN
position.)
SWEEP TIME/CM Selects the desired horizontal sweep rate
from a choice of 21 calibrated steps.
SWEEP TIME/CM Provides a continuous range of sweep
VARIABLE (red) rates between the fixed steps selected by
the SWEEP TIME/CM switch. (The sweep
rates are calibrated only when the VARI­
ABLE control is set fully clockwise to the
CALIBRATED position.)
SWEEP STABIL- Provides for a stable presentation when
ITY ADJUST the LEVEL control is in the AUTO, posi­
tion.
DC BAL. Provides for horizontal stability of no­
signal trace for all positions of SENSI­
TIVITY control.
SENSITIVITY Selects the sensitivity of the Horizontal
Am plifier from 14 calibrated steps.
SENSITIVITY Provides a continuous range o f sensitivity
VARIABLE (red) values between the fixed calibrated steps
selected by the SENSITIVITY control. (Nor­
mally, sensitivity is calibrated only when
VARIABLE control is in CALIBRATED posi­
tion.)
POSITION
+INPU T and
-IN P U T con­
nectors
Controls horizontal positioning of the dis­
play on the screen.
Input connectors for signal to be dis­
played horizontally. (Signals connected to
the — INPUT connector w ill be displayed
inverted.)
FOCUS
ASTIGMATISM
INTENSITY
POWER AND
SCALE ILLUM.
CAL. OUT con
nectors
HORIZONTAL
DISPLAY
POSITION
SENSITIVITY
SENSITIVITY
VARIABLE (red)
Focuses the trace or spot on the screen.
Controls roundness of the spot on the
screen. (This control is located inside on
instruments with serial numbers 000270
and above).
Controls the brightness of the trace or
spot on the screen.
Turns instrument power on and off, and
controls graticule illumination.
Provide amplitude-calibrated square waves
of 5 and 500 millivolts for use in calibrat­
ing gain of amplifiers.
Selects conventional (horizontal sweep) or
X-Y mode of operation.
Also provides
magnification of sweep rate selected by
SWEEP TIME/CM control.
VERTICAL CHANNEL
Controls vertical positioning of the display
on the screen.
Selects the sensitivity of the Vertical Am­
plifier from 14 calibrated steps.
Provides a continuous range of sensitivity
values between the fixed calibrated steps
selected by SENSITIVITY control. (Nor­
mally, sensitivity is calibrated only when
VARIABLE control is in CALIBRATED posi­
tion.)
-(-INPUT and Select desired coupling for incoming sig-
— INPUT nal.
switches
PRELIMINARY INSTRUCTIONS
To set up the Type 503 Oscilloscope for operation, pro­
ceed as follows:
1. Connect the oscilloscope to a suitable source of power
and turn the POWER switch clockwise from the POWER
OFF position. Set the INTENSITY control fully counterclock­
wise. Let the instrument warm up for about 15 minutes.
2. Set the HORIZONTAL DISPLAY switch to the HORIZ.
AMPLIFIER position.
3. Set all of the INPUT switches to the G N D position.
4. Set the two SENSITIVITY switches to the .2 VOLTS/CM
position and the SENSITIVITY VARIABLE controls to the
CALIBRATED position (fully clockwise until they snap into
position).
5. Set both POSITION controls to midrange and advance
the INTENSITY control to produce a spot on the screen.
The INTENSITY control should be set to produce an easily
seen, but not bright, spot. Too bright a spot may damage
the phosphor on the face of the CRT. The intensity should
never be turned up to the point where a halo forms around
the spot.
6. Adjust the FOCUS control to produce the smallest,
roundest spot possible. Note the position of the spot on the
CRT.
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