Tektronix 7613 User Manual

Vertical Amplifier
TABLE 2-2A
High-Frequency Compensation
Primary Area
Adjustment of Pulse Affected Best Sweep Rate
C2416 (11) First 10 nano- 20 nanoseconds/
R2416 (12) seconds division
R2519 (13)
C2418 (9) First 5 nano- 20 nanoseconds/
R2418 (10) seconds division
C2456 (14) First 2 nano- 5 nanoseconds/
seconds division (X10 Mag
and 0.05 us)
C2469 Adjust for 20 nanoseconds/
(located off minimum overall division
the board, see aberrations
Fig. 6-7A).
p. ADJUST~Position the top of the 6 division display
to the center horizontal graticule line. Set the 7B53A to 5
nanoseconds/division (X10 Mag and 0.05 us). Adjust trig-
gering for a stable + Slope display. Adjust C2456 (adjust-
ment 14) for 0.2 divisions of aberration on the front corner
of the pulse top. Adjust calibration fixture position control
for a centered six-division display and check for aberrations
as in step 15b. Remove the calibration fixture from the left
vertical compartment and install it in the right vertical
compartment.
q. Set the VERT MODE switch to RIGHT.
r, CHECK—For optimum square leading corner and flat
top
on
the
displayed
pulse
with
aberrations
not
to
exceed
40.1
or
—0.1
division,
with
total
peak-to-peak
aberrations
not
to
exceed
0.2
division
(use
Time/Div
and
Rep
Rate
settings as fisted in steps a through 0).
5.
ADJUST—If
necessary,
compromise
the
adjustments
in
steps
a
through
o
to
obtain
best
response
for
both
left
and
right
vertical
compartments.
t.
To
verify
correct
high-frequency
compensation,
per-
form
the
bandwidth
check
as
given
in
step
16
of
the
7613/R7613
Service
Manual
Calibration
Procedure.
Refer to your 7613/R7613 Service Manual for the
remainder of the calibration procedure (Step 16 and
up).
M20610/1073
REV. MAY 1974
7613/R7613 SN B150000-up
CIRCUIT DESCRIPTION CHANGES
FOR 7613/R7613
VERTICAL AMPLIFIER SN B150000-up
Replace the text in your 7613/R7613 Service Manual
for VERTICAL INTERFACE, VERTICAL AMPLIFIER,
and Figures 3-16, 3-17, and 3-18 with the following:
VERTICAL INTERFACE
General
The Vertical Interface circuit selects the vertical deflec-
tion signal from the output of the left vertical or the right
vertical plug-in unit. Fig. 3-164 shows a detailed block
diagram of the Vertical Interface circuit. A schematic of
this circuit is shown on the accompanying diagram.
Vertical Channel Switch
The Vertical Channei Switch stage (controlled primarily
by the Mainframe Vertical Mode Command from the Logic
circuit) determines which vertical signal is to be sent to the
Delay-Line Driver stage. Resistors R2333-R2335 and
R2337-R2339 establish the input resistance of this stage
and provide a load for the left and right vertical units.
Resistors R2347-R2349 and R2357-R2359-R2329 establish
the operating levels for this stage. R2343 and R2353 set the
current gain for each channel, C2345-R2345 and
C2355-R2355 provide frequency compensation.
The Vertical Channel Switch stage is made up primarily
of integrated circuit U2340, which is the same type as used
for the Trigger Channel Switch. An input/output table for
U2340 is shown in Fig. 3-17A. U2340 provides a high
impedance differential input for the signal from the left
vertical unit at pins 2 and 15, and the signal from the right
vertical unit at pins 7 and 10. The output signal at pins 12
and 13 is a differential signal that is connected to the
Delay-Line Driver stage through R2366-R2376. The sum of
the DC output currents at pins 12 and 13 is always equal to
the sum of the DC input currents at pins 1,8,9, and 16 in
all modes. This provides a constant DC bias to the following
stage as the VERT MODE switch is changed.
When the VERT MODE switch is set to LEFT, the level
at pin 4 is LO. This level allows the signal from the left
vertical unit to pass to the output while the signal from the
right vertical unit is blocked. In the RIGHT position of the
VERT MODE switch, the level at pin 4 is HI. Now, the
signal from the right vertical unit is connected to the
output while the signal from the left vertical unit is
blocked.
Page 3 of 13
7613

Tektronix 7613 Specifications

General

Brand	Tektronix
Model	7613
Category	Test Equipment
Language	English