Checks and Adjustment—7T11A
Part II—
Performance Check and Adjustment
C2.
CHECK
LOW-FREQUENCY TRIGGERING
C3.
CHECK
MEDIUM-FREQUENCY TRIGGERING
NOTE
First
perform step
C1,
then proceed.
NOTE
If the
previous step was
not performed, first perform
step C1.
C2. SETUP CONDITIONS
C3.
SETUP CONDITIONS
7T11A Controls:
INT pushbutton
...............................................................
Pressed in
TRIG
AMP X1 pushbutton.................................... Pressed in
SWEEP
RANGE..................................................................... 5 ms
TIME/DIV
......................................................
1 ms
IN TABLE 5-9)
Test Equipment Controls:
Low
Frequency Sine
Wave Generator
Frequency
.......................................
Sampling
Unit
Units/Div
.........................................
7T11A Controls:
INT
pushbutton.................................... Pressed in
TRIG
AMP X10 pushbutton.........................................
Pressed in
SWEEP
RANGE................................................................................5 µS
TIME/DIV............................................. 10 ns
18-INCH
ATTENUATOR
BNC
CABLES
Test Equipment
Controls:
Medium
Frequency
Sine Wave
Generator
Frequency
..............................................
Sampling
Unit
Units/Div
................................................
a. CHECK—7T11A low-frequency
triggering capability
by
using the control settings and requirements
given in Ta
ble
5-9
to
obtain a
stable, triggered display. The signal gen
erator output
amplitude is correct
when its
signal causes the
amount of vertical deflection
shown under the display size
column.
Add
a 10X BNC Attenuator to the 7T11A
trigger
signal as
indicated
in the right-hand column of Table 5-9.
Set 7T11A
STABILIY and TRIG LEVEL as necessary for a
stable
display. On real-time ranges, TIME
POSITION also
aids
in
stabilizing triggering. Changes
in control settings be
tween
successive steps are indicated
in the table with an
asterisk.
NOTE
To check
internai triggering from
the mainframe's
other
vertical
compartment, an additional Sampling
Unit may be
installed
and the internal
triggering steps
repeated
for
that compartment.
a. CHECK—7T11A
medium-frequency triggering ca
pability by
using the control settings and requirements given
in
Table 5-10 to obtain a
stable, triggered display. The signal
generator output
amplitude is correct when its signal causes
the
amount
of vertical deflection
shown under the Display
Size
column.
Set 7T11A
STABILIY and TRIG LEVEL as
necessary for
a
stable
display.
Add
a 10X BNC Attenuator
to
the
7T11A trigger
signal as
indicated in the right-hand
column
ot Table 5-10. Changes in control settings between
successive steps are
indicated
in the table with an asterisk.
5-44
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 ...