Tektronix 7613 User Manual

Calibration—7613/R7613 Service
c. CHECK—Trace aligns with the center horizontal line
within 0.1 division.
d. ADJUST—Trace Rotation adjustment R1181 (see
Fig. 2-2) to align the trace with the center horizontal line.
7. Adjust Y-Axis Alignment
a. Inter-change the 7B53A and mainframe standardizer
plug-in units.
b. Move the trace to the center vertical line with the
mainframe standardizer Position control.
c. CHECK—Trace aligns with the center vertical !ine
within 0.1 division.
d. ADJUST—Y-Axis adjustment R1190 (see Fig. 2-2) to
align the trace with the center vertical line.
8. Adjust Geometry
a. Remove the mainframe standardizer and install the
7B53A in the horizontal compartment. Replace the main-
frame standardizer in the left vertical compartment.
b. Set the VERT MODE switch to LEFT.
c. Connect the marker output of the time-mark genera-
tor to the Aux In connector of the calibration fixture with
an 18-inch 50-ohm BNC cable.
d. Connect the trigger output of the time-mark genera-
tor to the external trigger input connector of the 7B53A
with a 42-inch 50-ohm BNC cable.
e. Set the time-mark generator for one-millisecond
markers and one-millisecond triggers.
f. Set the calibration fixture Test switch to Vert or
Horiz Aux In and the Amplitude Step or Aux control fully
clockwise.
g. Set the 7B53A for auto triggering from the externa!
source at a sweep rate of 0.5 millisecond/division (magnifier
off).
h. Set the 7B53A variable time/division control to
obtain exactly one marker for each major graticule division.
2-8
i. Set the time-mark generator for both one- and
0.1-millisecond markers.
j. Position the baseline of the markers as far toward the
bottom of the graticule as possible with the calibration
fixture Position control.
k. CHECK—Vertical bowing and tilt of the marker
display is less than 0.1 division (each 0.1-millisecond
marker represents 0.1 division).
1. ADJUST—Geometry adjustment R1184 (see Fig. 2-2)
for minimum bowing of time markers. Adjustment may
have to be compromised to obtain less than 0.1 division
bowing and tilt everywhere within the graticule area.
9. Check External Z-Axis Operation
a. Install the 7A15A in the right vertical compartment.
b. Connect the output of the medium-frequency
constant-amplitude signal generator to the input of the
7A15A through the five-nanosecond GR cable, 50-ohm GR
in-line termination, and the BNC T connector.
c. Set the 7A15A for a deflection factor of one
volt/division.
d. Set the 7B53A for auto, internal triggering at a
calibrated sweep rate of 10 microseconds/division.
e. Set the medium-frequency generator for a two-
division display at its reference frequency (50 kilohertz).
f. Connect the output of the BNC T connector to the
EXT Z-AXIS connector with the 42-inch 50-ohm BNC
cable.
g. CHECK—Top portion of displayed waveform blanked
out,
h. Disconnect cable from external Z-AXIS connector.
10. Check Beam Finder
a. Set the 7A15A deflection factor to 20 millivolts/
division. Notice that the display exceeds the viewing area.
b. Press the BEAM FINDER switch.
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English