Tektronix 7613 User Manual

HORIZONTAL DEFLECTION SYSTEM
Equipment Required
1. 7B53A plug-in unit
2. 7A15A plug-in unit (two)
3. Mainframe standardizer calibration fixture
4. Test-oscilloscope system with two 10X probes
5. Time-mark generator
6. Low-frequency generator
7. Medium-frequency generator
8. Dual-input coupler
9. Five-nanosecond GR cable
10. 50-ohm GR in-line termination
11. 42-inch 50-ohm BNC cable
12, 50-ohm BNC termination
13. Three-inch screwdriver
14. Low-capacitance screwdriver
Control Settings
Set the controls as given under Preliminary Control
Settings.
22. Adjust Horizontal Amplifier Limit Centering
a. Install the 7B53A in the horizontal compartment.
b. Set the 7B53A for auto, internal triggering at a sweep
rate of one millisecond/division with the magnifier on.
c. Connect 10X probes to both inputs of the test
oscilloscope. Connect the probe tips to the horizontal
deflection plate connectors of the 7613 (be sure probes are
compensated).
d. Set both channels of the test oscilloscope for a
vertical deflection factor of 1.0 volt/division (ten volts/
division at probe tip) in the chop dual-trace mode with the
input coupling set to ground.
e. Position the ground-reference traces displayed on the
test oscilloscope to the center horizontal line of the
graticule. Do not change the test-oscilloscope position
controls after establishing this ground reference.
Calibration—76 13/R7613 Service
f. Set the test oscilloscope for DC input coupling and
set the triggering controls so the test oscilloscope is
triggered from the signal on channel 1 only. Set the
triggering controls for a stable display at a sweep rate of
two milliseconds/division,
g. CHECK—The base line of both displayed waveforms
should be at the same DC level within 0.2 division (see Fig.
2-5).
h. ADJUST—Limit Centering adjustment R535 (see Fig.
2-6) to match the DC levels of both waveforms.
i. Disconnect all test equipment and remove the 7B53A.
23. Adjust Horizontal Amplifier Centering
a. Install the calibration fixture in the horizontal comp-
artment and set the Test Switch to Triggering Gain.
b. CHECK—Spot produced by 7B53A should align with
the vertical center line of the graticule within 0.3 division.
c. ADJUST—Horizontal Centering adjustment R525
(see Fig. 2-6) to position the spot to the vertical center line.
d. INTERACTION—If R525 is adjusted, re-check steps
22 and 23.
e. Remove the calibration fixture from the horizontal
compartment.
Fig. 25. Test oscilloscope waveforms when horizontal limit
centering is properly adjusted.
2-13
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English