Tektronix 7613 User Manual

Calibration—7613/R7613 Service
High-Voltage
Test Point
Readout Board
Remove
Fig. 2-1. (A) Location of power supply and high.voltage test points
(right side of instrument); (B) Location of —50 V adjustment (Low
Voltage Regulator board).
3. Check High-Voltage Power Supply
a. Turn off instrument.
b. Set the DC voltmeter (VOM) to measure at least
3000 volts. Then, connect it between the high-voltage test
point (see Fig. 2-1A) and chassis ground.
c. Press power switch (turn on instrument). Check
meter reading; —1475 volts +45 volts.
d. Turn off instrument. Disconnect the DC voltmeter.
e. Turn on instrument.
DISPLAY AND Z-AXIS
Equipment Required
1. Mainframe standardizer calibration fixture
2. 7B53A plug-in unit
3. DC Voltmeter (VOM)
4. 7A15A plug-in unit
5. Time-mark generator
6. Medium-frequency generator
7. BNC to pin-jack cable
8. 18-inch 50-ohm BNC cable
9. 42-inch 50-ohm BNC cable
10. Five-nanosecond GR cable
11. 50-ohm GR in-line termination
12. BNC T connector
13. Three-inch screwdriver
14. Low-capacitance screwdriver
Control Settings
Set the controls as given under Preliminary Control
Settings.
4A. Adjust CRT Grid Bias
a. Install the mainframe standardizer calibration fixture
(or a vertical plug-in) in the left vertical compartment and
depress the LEFT VERT MODE button. Set the fixture for
Vert or Horiz +Step Resp, amplitude fully counterclock-
wise, and Position to midrange.
b. Install the time base plug-in in the horizontal
compartment, and set it for 1.0 ms/division. Adjust trig-
gering for a free-running sweep. If a 7B53A time base
plug-in is to be used with the 7613 (R7613), set it for
Intensified sweep.
c. Adjust the fixture Position control to bring the trace
‘on screen, then rotate both the INTENSITY and READ-
OUT INTENSITY controls fully counterclockwise.
d. Connect a 10X probe from the test-oscilloscope to
the Z-Axis test point (see Fig. 2-2) and the probe ground
lead to chassis ground.
e. Set the test-oscilloscope to DC input and a display of
5 volts/division (including probe attenuation), position the
trace to the center graticule line.
f. ADJUST—INTENSITY control for a display ampli-
tude 2 volts above the center graticule line.
g. ADJUST—CRT Bias adjustment R1261 (see Fig. 2-2)
until the trace on the 7613 (R7613) is just extinguished.
Set INTENSITY for a viewable trace.
26 REV. JAN 1974
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English