Section
5-7T11A
SECTION
5
CHECKS
AND
ADJUSTMENT
This
section
provides information necessary to: (1) verify that the instrument meets applicable electrical specifications in
Section 1,
(2) verify that
controls function property, and (3) perform all internal adjustments.
The
Part I-Performance Check
procedure checks the electrical specifications listed in Section 1 with out making any
internal
adjustments.
The
Part II-Performance Check and Adjustment procedure provides a complete sequential check of instrument perfor
mance concurrent with a complete sequential adjustment of internal controls.
A seperate Operators
Checkout Procedure is provided in Section 2 of this manual for familiarization with the instrument
and
to verify that
all front-panel
controls and connectors function properly.
PRELIMINARY
INFORMATION
Using
These Procedures
Both
Part I—Performance Check and Part
II-Performance
Check and Adjustment
are divided into
functional block
subsections (e.g., A. TRIGGER ADJUST
MENTS,
B. SCAN
AND TIMING, etc.) The order in which
the
subsections and steps
(A1, A2,
B1, B2, etc.) appear in
each
procedure is the recommended sequence for accom
plishing
a performance check or adjustment of the instru
ment.
Subsections
within either
procedure can be
performed independently, as can each step within any sub
section.
Refer
to
Partial Procedures
for specific instructions
on
performing
either a partial
Performance Check
or partial
Performance
Check and
Adjustment.
All
functional
block
subsections begin
with a list of re
quired
test equipment,
followed
by
instructions for Before
You
Begin and the list
of Preliminary Control Settings for
that
subsection (e.g.,
A1.
TRIGGER ADJUSTMENTS
PRE
LIMINARY
CONTROL
SETTINGS). Each step contains
separate
Setup Conditions which,
if applicable, include the
instrument control settings, an illustrated test
setup, and
test
equipment control settings. The instrument and test
equipment
control settings
listed in the Setup Conditions for
each
step
may include additional settings, changes from the
previous
step, or
changes to the Preliminary Control
Settings
making it possible to perform partial procedures.
The
illustrated test setup in the
Setup Conditions shows all
test
equipment
needed to
perform the entire step, as well as
the setup necessary to begin
the step instructions.
In this
procedure, capital
letters within the body of text
identify
front-panel controls, indicators and connectors on
the
7T11A (e.g., SCAN). Initial
capital letters identify con
trols, indicators,
and connectors (e.g., Position) on associ
ated test equipment used in this
procedure. Initial
capitals
also
identify adjustments inside the 7T11A (e.g., Memory
Gate
Bal).
A
heading system is
provided to readily identify the steps
(A1,
A2, B1, B2, etc.) that contain performance check
and/or
adjustment
instructions. For example, if
CHECK is
the
first word
in the title of a step,
an electrical specification
is
checked. If
ADJUST is the
first word in the title, the step
concerns
one or more internal adjustments.
If
CHECK/ADJUST
appears
in the title, the
step involves elec
trical
specification checks and related adjustments. If EX
AMINE is the
first word
in the
step title, the step concerns
measurement
limits that
indicate whether
the
instrument is
operating properly; these limits are not to be interpreted as
electrical
specifications.
The
alphabetical instructions under each step (a, b, c,
etc.) may also
contain CHECK,
EXAMINE, ADJUST, or IN
TERACTION as the the first word of the instruction. These
terms are defined as follows:
1.
ADJUST
—describes which adjustment
to make and
the desired
result.
We recommend that the adjustments not
be
made
if
a previous CHECK
or EXAMINE instruction indi
cates that no
adjustment is necessary.
5-1
Summary of Contents for 7T11A
Page 10: ...7T11A Instruction Manual 7T11A Sampling Sweep Unit viii ...
Page 39: ...Theory of Operation 7T11A 3 11 ...
Page 44: ...Theory of Operation 7T11A Figure 3 11 7T11A Blanking Logic 3 16 ...
Page 47: ...Theory of Operation 7T11A Figure 3 14 Random mode block diagram 3 19 ...
Page 179: ...y TRIGGER INPUT HF Sync Selected HF Sync Selected ...
Page 180: ...THIA SAMPLING SWEEP UNIT 6176 127 ...
Page 181: ...TRIGGER INPUT J TRIGGER INPUT 6 76 127 ...
Page 182: ...7T11A A3 TRIGGER BOARD Figure 8 3 A3 Trigger circuit ...
Page 183: ......
Page 185: ...Ext Trig ...
Page 186: ......
Page 187: ......
Page 189: ......
Page 191: ...Time position CW SEQUENTIAL OV Ext Trig Time position CW RANDOM ...
Page 192: ......
Page 193: ...TIME TO HEIGHT CONVERTER 176 12 5 TIME TO HEIGHT CONVERTER s 9 ...
Page 194: ...7T11A A1 LOGIC BOARD ...
Page 195: ......
Page 197: ...1000 Ω resistor between pins 17 18 of J641 ...
Page 198: ...NOTfcS UEADLE55 CAPACITOR l FOR DECOUPLING NETWORKS SEE H THIA SAMPLING SWEEP UNIT GITG I3Ö ...
Page 199: ......
Page 200: ...7T11A A4 INTERFACE BOARD Figure 8 6 A4 lnterface circuit ...
Page 201: ...b 8 6 A4 lnterface circuit board assembly ...
Page 203: ......
Page 204: ......
Page 205: ......
Page 206: ...5 ns DIV 5 ns DIV 5 ns DIV 5 ns DIV Ext Trig 5 ns DIV ...
Page 207: ......
Page 208: ......
Page 209: ...Ext Trig ...
Page 210: ......
Page 211: ......
Page 212: ......
Page 213: ......
Page 214: ......
Page 215: ... 7TII SAMPLING SWEEP UNIT W7G 135 ...
Page 216: ...W7G 35 TIMING SWITCHES TIMING SWITCHES ...
Page 218: ...OUTPUT CONNECTORS 136 OUTPUT CONNECTORS 0 ...
Page 219: ...PARTIAL A4 INTERFACE OARD Gl7 i I37 7T11A SAMPLING SWEEP UNIT ...
Page 220: ... 137 VOLTAGE DISTRIBUTION DECOUPLING VOLTAGE DISTRIBUTION DECOUPLING H ...
Page 221: ... 174 136 1T11R SAMPLING SWEEP UNIT ...
Page 222: ...FRONT PANEL SWITCHING ...
Page 223: ...TP884 TP658 Figure 8 7 Location of Logic adjustments A2 5 im R ...
Page 231: ...12 ...
Page 232: ...FIG 1 EXPLODED VIEW 7T11A ...
Page 234: ...F IG 2 ACCESSORIES 7T11A ...