Tektronix 323, Инструкция по эксплуатации

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Performance Check— Type 3 2 3
only n partial check is desired, refer to the preceding
sfep(s) for setup information. External controls or adjust­
ments of the Type 323 referred to in this procedure are
capitalized (e.g., VOLTS/DIV).
The following procedure uses the equipment listed under
Recommended Test Equipment. If equipment is substituted,
control settings or setup may need to be altered to meet the
requirements of the equipment used.
Preliminary Procedure
1. Connect the Type 323 to the variable DC power supply
output (set for -(-8 volts) or directly to a power source (if
step 1 is deleted) which meets the voltage and frequency
requirements of this instrument.
NOTE
Battery operation can be used fo r this procedure
if the internal batteries are fu lly charged before
proceeding.
2. Set the Type 323 controls as follows:
Vertical Controls
VOLTS/DIV .01
VARIABLE CAL
INPUT GND
Vertical POSITION Midrange
X lO VERT GAIN
Pushed in
Triggering Controls
TRIGGER + AUTO
Trig/Horiz Coupling INT TRIG AC
EXT TRIG OR I X
HORIZ ATTEN
(side panel)
Horizontal Controls
TIME/DIV 1 ms
VARIABLE CAL
Horizontal POSITION Midrange
X lO HORIZ MAG Pushed in
CRT Controls
FOCUS
Adjust for focused display
INTENSITY
Adjust for visible display
Power Controls
POWER ON
Power Pack (rear panel)
As necessary for power
source
3. Set the POWER switch to ON. Allow several minutes
warm up before proceeding.
1. Check Low Batteries Indicator
REQUIREMENT— LOW BATT light begins to flash when
applied DC voltage is reduced to +6.25 volts, ±0.31 volt.
a. Slowly decrease the output voltage of the variable
DC power supply.
b. CHECK— LOW BATT light begins to flash when vari­
able DC power supply output voltage is +6.25 volts, ±0.31
volt (if variable DC power supply does not have an accu­
rate meter to indicate output voltage, use an accurate DC
voltmeter to monitor the output for this step).
c. Return variable DC power supply output voltage to
+ 8 volts.
2. Check V a ria b le V o lts /D iv is io n Balance
REQUIREMENT— Less than one division vertical trace
shift as the VARIABLE VOLTS/DIV control is rotated through­
out its range.
a. Position the trace to the center horizontal line with
the vertical POSITION control.
b. CHECK— Rotate the VARIABLE VOLTS/DIV control
throughout its range. Trace should not move more than one
division vertically (if the trace is not visible at all, preadjust
the VAR V/DIV BAL adjustment to bring the trace on
screen).
c. If there is excessive trace shift, adjust the VAR V/DIV
BAL adjustment (on bottom of instrument) for no trace shift
as the VARIABLE VOLTS/DIV control is rotated. If neces­
sary, use the vertical POSITION control to keep the trace
on screen during this adjustment.
3. Check V ertical X l O Balance
REQUIREMENT— Less than one division vertical trace shift
as the X lO VERT GAIN switch is pulled out.
a. Return the VARIABLE VOLTS/DIV control to CAL.
b. Position the trace to the center horizontal line with
the vertical POSITION control.
c. Pull the X lO VERT GAIN switch out. Be careful not
to change knob position as the X lO VERT GAIN switch
is pulled out.
d. CHECK—Trace shift less than 1.5 divisions vertically.
e. If there is excessive trace shift, adjust the VERT X lO
BAL adjustment (on bottom) for minimum trace shift as the
X lO VERT GAIN switch is pulled out (if adjustment is made,
recheck step 2).
4. Check A stigm atism
REQUIREMENT— Best definition of marker display.
a. Change the following control settings:
VOLTS/DIV .5
INPUT DC
X lO VERT GAIN Pushed in
b. Set the INTENSITY control midway between a barely
visible trace and fully clockwise.
c. Connect the time-mark generator (Type 184) to the
VERT INPUT connector with the 42-inch BNC cable.
5-2
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