Tektronix 7613 User Manual

Calibration—-7613/R7613 Service
m, ADJUST—Level Preset (R1473) and Prep (R1467)
adjustments if necessary, decrease both levels to ~—10 volts
on the test oscilloscope. Increase both levels equally until
the screen turns bright. Increase the Prep adjustment level
for approximately 4 volts higher than the Level Preset
level.
n. Release ERASE switch. Turn PERSISTENCE control
clockwise, note 15-volt pulses on test oscilloscope. Turn
PERSISTENCE control counterclockwise and note change
in pulse width.
40. CHECK Stored Writing Rate
a. Connect a low frequency sine-wave generator set at
250 kHz through BNC cable and a 50 ohm termination to
the input of the 7A15A in the vertical compartment of the
7613. The sine-wave amplitude should be about 6 divisions.
b. Set the 7613 time base unit to single sweep, and
PERSISTENCE to Max. Press the ERASE button and reset
the time base unit.
c. CHECK—that the display is stored on the screen. If
no display is stored, increase the Stored intensity control
setting, and reset the time base sweep. Check that the
display is stored for more than 15 seconds.
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Fig. 2-10. Erase pulses from Storage Target Backptate Amplifier.
2-20
d. Change the frequency of the low frequency sine-wave
generator to 50 kHz. Reset the sweep of the time base unit.
e. CHECK—That the stored display is stored on the
screen for more than 60 sconds. For longer viewtimes,
reduce the STORED INTENSITY control setting.
41. Check Save Functions
a. Store a display.
b. Press the SAVE button (in).
ec. Turn SAVETIME control clockwise for a visible
display.
d. CHECK—that the erase switch will not erase the
display when pressed.
e. Turn SAVETIME control counterclockwise and into
switch detent. Press the SAVE button (out).
f. CHECK-—that display is not stored. Turn SAVETIME
control out of switch detent.
42. Check Remote Erase
a. Ground center pin of the remote erase connector on
rear panel.
b. CHECK-—for an erase cycle.
This completes the calibration/checkout procedure for
the 7613. Disconnect all test equipment and replace the
side panels. If the instrument has been completely checked
and adjusted to the tolerances given in this procedure, it
will meet or exceed the specifications given in the
Operators Manual.
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English