Check Delay Time, A Time, And Trace Separation Ranges; Oscilloscope Mainframe - Tektronix 7B15 Instruction Manual

136. CHECK DELAY TIME, A TIME, AND
TRACE SEPARATION RANGES
If the preceding step was not performed, first
refer to the Horizontal System Preliminary
Control Settings,
then proceed with the
following instructions .
71315 Controls :
B DELAY MODE . . . . . . . . . . . . . . . . . . . . . . B STARTS AFTER IDLY
REV JUN 1983
SETUP CONDITIONS
1
BNC
Cable
NOTE
B6 . SETUP CONDITIONS
L]
Vert
Amp
~--0
Oscillo-
scope
Main-
frame
T71315 Time
Base
Time Base:
Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto, Ac, Int
Level . . . . . . . . . . . . . . . . . . . . . . . . . Stable display (Trig'd light on)
Time/div . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1O ps
Mainframe :
Horizontal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternate
Vertical Amplifier (HI Freq) . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V/div
Time-Mark Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
ms
a. CHECK-Set the DELAY TIME control fully clockwise
and check for a delay-time readout of 9.000 ms or greater.
b. CHECK--Set the
DELAY TIME control fully
counterclockwise and check for a delay-time readout of
0.200 ms or less .
c. Set the TRACE SEP control counterclockwise, out of
the switch detent, to enable A TIME operation.
d. CHECK--That the A symbol appears in the delay-time
readout.
e. CHECK--Set the 0 TIME control fully clockwise and
check for a A time reading of 9.000 ms or greater.
f. CHECK--Set the 0 TIME control fully counterclockwise
and check for a A time readout of 0.000 ms to 0.001 ms .
Check that the A symbol precedes the readout display.
g. Set the TRACE SEP control fully clockwise. Set the
mainframe vertical trace separation control to midrange .
Position the delayed-sweep trace, with the amplifier
plug-in unit position control, to the center graticule line .
h . CHECK--Set the TRACE SEP control fully
counterclockwise and check that the second delayed-
sweep trace is at least 3 divisions below graticule center .
B7 . CHECK A TIME ACCURACY
Time-Mark
Generator
SETUP CONDITIONS
BNC
Cable
NOTE
Calibration Part I--7815
Performance Check
if the preceding step was not performed, first
refer to the Horizontal System Preliminary
Control Settings,
then proceed with the
following instructions.
71315 Controls :
TIME/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 .1
Ns
B DELAY MODE . . . . . . . . . . . . . . . . . . . . . . B STARTS AF'T'ER IDLY
TRACE SEP . . . . . . . . . . . . . . . . . . . . . . . . . . . Out of switch detent
Time Base :
Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto, Ac, Int
Level . . . . . . . . . . . . . . . . . . . . . . . . . Stable display (Trig'd light on)
Time/div . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ns
Mainframe:
Horizontal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternate
Vertical Amplifier (HI Freq) . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V/div
Time-Mark Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 .1
Ns
a. Set the TRACE SEP control to position the second
delayed-sweep trace approximately 0.2 divisions below
the first delayed-sweep trace .
b. Position the display for 1 marker/division over the
center 8 divisions of intensified display.
c. Set the DELAY TIME control to start the first intensified
zone on the time marker which is nearest the second
graticule line . Set the A TIME control to start the second
intensified zone on the time marker which is nearest the
tenth graticule line .
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