Tektronix 7613 User Manual

Vertical Amplifier
7613/R7613 SN B150000-up
VERTICAL AMPLIFIER CIRCUIT
USING
670-3154- and 670-3186- CIRCUIT BOARDS
GENERAL
The 7613 and R7613 with serial numbers above
8150000 contain different vertical output amplitier and
vertical interface circuitry fram the ones shown in the main
portion of the 7613/R7613 manual. Instrument specifica-
tions are not affected, and portions of the manual other
than those listed in the following paragraph are unaltered
by this change.
This insert includes the Calibration Procedure, Circuit
Description, Electrical Parts List, Mechanical Parts List,
Board Layouts with Adjustment Locations, and Schematic
Diagrams that replace the existing Diagram 4 and part of
Diagram 3 in the 7613/R7613 Service Manual. Future
changes affecting this circuitry will be mentioned by inserts
that refer to M20610 insert or Serial Numbers B150000
and up. Where possible, any such changes will be incor-
porated in revisions of this M20610 insert.
CALIBRATION PROCEDURE
FOR 7613/R7613
VERTICAL AMPLIFIER SN B150000-up
(Replaces Steps 11 through 15 of existing procedure)
NOTE
Adjustable components in this procedure are marked
with an adjustment number. This number is marked
on the circuit board, board layout drawing, and
schematic diagram to aid in locating the component
to be adjusted.
if the instrument being calibrated is not equipped
with the readout feature, set the Thermal Balance
control R2527 (adjustment 3) for a reading of +8.65
volts at the R2527 end of C2524 (see Fig. 6-7A} and
omit step 13 of this procedure.
11. Adjust Vertical Centering
a. Install the 7B53A in the horizontal compartment and
set it for auto, internal + Slope triggering at the sweep rate
of one millisecond/division.
b. Install the mainframe standardizer calibration fixture
(067-0587-01) in the teft vertical compartment. Set the
calibration fixture Test switch to Triggering Gain, and the
Rep Rate switch to 1 kHz.
M20610/ 1073
REV. MAY 1974
c. CHECK—That the trace is within 0.3 division of the
graticule center line.
d. ADJUST—Vertical Centering adjustment R2433 (ad-
justment 1), see Fig. 6-7A, to position the trace to the
center horizontal line.
e. Set VERT MODE to RIGHT and repeat step c.
Readjust R2433 for steps c and e if necessary.
f. Set VERT MODE to LEFT.
12. Adjust Vertical Gain
a. Set the calibration fixture Test switch to Vert or
Horiz Gain, and set the Time Base to 50 ps.
b. Position the bright center line of the display to the
center horizontal graticule line.
c. CHECK—Deflection for the center seven traces
should be six divisions 0.06 division.
d. ADJUST—Vertical Gain adjustment R2446 (adjust-
ment 2) (see Fig. 6-7A) for exactly six divisions of
deflection for the center seven traces.
e. Remove the calibration fixture from the left vertical
compartment and install it in the right vertical
compartment.
f. Set the VERT MODE switch to RIGHT.
g. CHECK—Deflection for the center seven traces
should be the same as in part c or d 1%.
h. ADJUST—If necessary, re-adjust R2446 (adjustment
2) for correct tolerances in both parts d and h.
13. Adjust Thermal Balance (See NOTE preceding
step 11)
a. Set the calibration fixture to + Step Resp and
Amplitude to minimum, Position the trace to the top
graticule line.
Page 1 of 13
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English